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修改单例实现为qtsingleapplication

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hewenfei 2023-04-10 18:01:18 +08:00
parent 3b22b2bac8
commit 544f7c8894
78 changed files with 5228 additions and 1483 deletions
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224
3rd-parties/SingleApplication/CHANGELOG.md
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Changelog
=========
__3.0.18__
----------
* Fallback to standard QApplication class on iOS and Android systems where
the library is not supported.
__3.0.17__
----------
* Fixed compilation warning/error caused by `geteuid()` on unix based systems.
_Iakov Kirilenko_
* Added CMake support
_Hennadii Chernyshchyk_
__3.0.16__
----------
* Use geteuid and getpwuid to get username on Unix, fallback to environment variable.
_Jonas Kvinge_
__3.0.15__
----------
* Bug Fix: sendMessage() might return false even though data was actually written.
_Jonas Kvinge_
__3.0.14__
----------
* Fixed uninitialised variables in the `SingleApplicationPrivate` constructor.
__3.0.13a__
----------
* Process socket events asynchronously
* Fix undefined variable error on Windows
_Francis Giraldeau_
__3.0.12a__
----------
* Removed signal handling.
__3.0.11a__
----------
* Fixed bug where the message sent by the second process was not received
correctly when the message is sent immediately following a connection.
_Francis Giraldeau_
* Refactored code and implemented shared memory block consistency checks
via `qChecksum()` (CRC-16).
* Explicit `qWarning` and `qCritical` when the library is unable to initialise
correctly.
__3.0.10__
----------
* Removed C style casts and eliminated all clang warnings. Fixed `instanceId`
reading from only one byte in the message deserialization. Cleaned up
serialization code using `QDataStream`. Changed connection type to use
`quint8 enum` rather than `char`.
* Renamed `SingleAppConnectionType` to `ConnectionType`. Added initialization
values to all `ConnectionType` enum cases.
_Jedidiah Buck McCready_
__3.0.9__
---------
* Added SingleApplicationPrivate::primaryPid() as a solution to allow
bringing the primary window of an application to the foreground on
Windows.
_Eelco van Dam from Peacs BV_
__3.0.8__
---------
* Bug fix - changed QApplication::instance() to QCoreApplication::instance()
_Evgeniy Bazhenov_
__3.0.7a__
----------
* Fixed compilation error with Mingw32 in MXE thanks to Vitaly Tonkacheyev.
* Removed QMutex used for thread safe behaviour. The implementation now uses
QCoreApplication::instance() to get an instance to SingleApplication for
memory deallocation.
__3.0.6a__
----------
* Reverted GetUserName API usage on Windows. Fixed bug with missing library.
* Fixed bug in the Calculator example, preventing it's window to be raised
on Windows.
Special thanks to Charles Gunawan.
__3.0.5a__
----------
* Fixed a memory leak in the SingleApplicationPrivate destructor.
_Sergei Moiseev_
__3.0.4a__
----------
* Fixed shadow and uninitialised variable warnings.
_Paul Walmsley_
__3.0.3a__
----------
* Removed Microsoft Windows specific code for getting username due to
multiple problems and compiler differences on Windows platforms. On
Windows the shared memory block in User mode now includes the user's
home path (which contains the user's username).
* Explicitly getting absolute path of the user's home directory as on Unix
a relative path (`~`) may be returned.
__3.0.2a__
----------
* Fixed bug on Windows when username containing wide characters causes the
library to crash.
_Le Liu_
__3.0.1a__
----------
* Allows the application path and version to be excluded from the server name
hash. The following flags were added for this purpose:
* `SingleApplication::Mode::ExcludeAppVersion`
* `SingleApplication::Mode::ExcludeAppPath`
* Allow a non elevated process to connect to a local server created by an
elevated process run by the same user on Windows
* Fixes a problem with upper case letters in paths on Windows
_Le Liu_
__v3.0a__
---------
* Deprecated secondary instances count.
* Added a sendMessage() method to send a message to the primary instance.
* Added a receivedMessage() signal, emitted when a message is received from a
secondary instance.
* The SingleApplication constructor's third parameter is now a bool
specifying if the current instance should be allowed to run as a secondary
instance if there is already a primary instance.
* The SingleApplication constructor accept a fourth parameter specifying if
the SingleApplication block should be User-wide or System-wide.
* SingleApplication no longer relies on `applicationName` and
`organizationName` to be set. It instead concatenates all of the following
data and computes a `SHA256` hash which is used as the key of the
`QSharedMemory` block and the `QLocalServer`. Since at least
`applicationFilePath` is always present there is no need to explicitly set
any of the following prior to initialising `SingleApplication`.
* `QCoreApplication::applicationName`
* `QCoreApplication::applicationVersion`
* `QCoreApplication::applicationFilePath`
* `QCoreApplication::organizationName`
* `QCoreApplication::organizationDomain`
* User name or home directory path if in User mode
* The primary instance is no longer notified when a secondary instance had
been started by default. A `Mode` flag for this feature exists.
* Added `instanceNumber()` which represents a unique identifier for each
secondary instance started. When called from the primary instance will
return `0`.
__v2.4__
--------
* Stability improvements
* Support for secondary instances.
* The library now recovers safely after the primary process has crashed
and the shared memory had not been deleted.
__v2.3__
--------
* Improved pimpl design and inheritance safety.
_Vladislav Pyatnichenko_
__v2.2__
--------
* The `QAPPLICATION_CLASS` macro can now be defined in the file including the
Single Application header or with a `DEFINES+=` statement in the project file.
__v2.1__
--------
* A race condition can no longer occur when starting two processes nearly
simultaneously.
Fix issue [#3](https://github.com/itay-grudev/SingleApplication/issues/3)
__v2.0__
--------
* SingleApplication is now being passed a reference to `argc` instead of a
copy.
Fix issue [#1](https://github.com/itay-grudev/SingleApplication/issues/1)
* Improved documentation.

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3rd-parties/SingleApplication/CMakeLists.txt
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cmake_minimum_required(VERSION 3.1.0)
project(SingleApplication)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
# SingleApplication base class
set(QAPPLICATION_CLASS QApplication CACHE STRING "Inheritance class for SingleApplication")
set_property(CACHE QAPPLICATION_CLASS PROPERTY STRINGS QApplication QGuiApplication QCoreApplication)
# Libary target
add_library(${PROJECT_NAME} STATIC
singleapplication.cpp
singleapplication_p.cpp
)
# Find dependencies
find_package(Qt5Network)
if(QAPPLICATION_CLASS STREQUAL QApplication)
find_package(Qt5 COMPONENTS Widgets REQUIRED)
elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
find_package(Qt5 COMPONENTS Gui REQUIRED)
else()
find_package(Qt5 COMPONENTS Core REQUIRED)
endif()
add_compile_definitions(QAPPLICATION_CLASS=${QAPPLICATION_CLASS})
# Link dependencies
target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Network)
if(QAPPLICATION_CLASS STREQUAL QApplication)
target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Widgets)
elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Gui)
else()
target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Core)
endif()
if(WIN32)
target_link_libraries(${PROJECT_NAME} PRIVATE advapi32)
endif()
target_include_directories(${PROJECT_NAME} PUBLIC .)

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3rd-parties/SingleApplication/LICENSE
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The MIT License (MIT)
Copyright (c) Itay Grudev 2015 - 2016
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
Note: Some of the examples include code not distributed under the terms of the
MIT License.

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3rd-parties/SingleApplication/README.md
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SingleApplication
=================
This is a replacement of the QtSingleApplication for `Qt5`.
Keeps the Primary Instance of your Application and kills each subsequent
instances. It can (if enabled) spawn secondary (non-related to the primary)
instances and can send data to the primary instance from secondary instances.
Usage
-----
The `SingleApplication` class inherits from whatever `Q[Core|Gui]Application`
class you specify via the `QAPPLICATION_CLASS` macro (`QCoreApplication` is the
default). Further usage is similar to the use of the `Q[Core|Gui]Application`
classes.
The library sets up a `QLocalServer` and a `QSharedMemory` block. The first
instance of your Application is your Primary Instance. It would check if the
shared memory block exists and if not it will start a `QLocalServer` and listen
for connections. Each subsequent instance of your application would check if the
shared memory block exists and if it does, it will connect to the QLocalServer
to notify the primary instance that a new instance had been started, after which
it would terminate with status code `0`. In the Primary Instance
`SingleApplication` would emit the `instanceStarted()` signal upon detecting
that a new instance had been started.
The library uses `stdlib` to terminate the program with the `exit()` function.
You can use the library as if you use any other `QCoreApplication` derived
class:
```cpp
#include <QApplication>
#include <SingleApplication.h>
int main( int argc, char* argv[] )
{
SingleApplication app( argc, argv );
return app.exec();
}
```
To include the library files I would recommend that you add it as a git
submodule to your project and include it's contents with a `.pri` file. Here is
how:
```bash
git submodule add git@github.com:itay-grudev/SingleApplication.git singleapplication
```
**Qmake:**
Then include the `singleapplication.pri` file in your `.pro` project file.
```qmake
include(singleapplication/singleapplication.pri)
DEFINES += QAPPLICATION_CLASS=QApplication
```
**CMake:**
Then include the subdirectory in your `CMakeLists.txt` project file.
```cmake
set(QAPPLICATION_CLASS QApplication CACHE STRING "Inheritance class for SingleApplication")
add_subdirectory(src/third-party/singleapplication)
```
Also don't forget to specify which `QCoreApplication` class your app is using if it
is not `QCoreApplication` as in examples above.
The `Instance Started` signal
------------------------
The SingleApplication class implements a `instanceStarted()` signal. You can
bind to that signal to raise your application's window when a new instance had
been started, for example.
```cpp
// window is a QWindow instance
QObject::connect(
&app,
&SingleApplication::instanceStarted,
&window,
&QWindow::raise
);
```
Using `SingleApplication::instance()` is a neat way to get the
`SingleApplication` instance for binding to it's signals anywhere in your
program.
__Note:__ On Windows the ability to bring the application windows to the
foreground is restricted. See [Windows specific implementations](Windows.md)
for a workaround and an example implementation.
Secondary Instances
-------------------
If you want to be able to launch additional Secondary Instances (not related to
your Primary Instance) you have to enable that with the third parameter of the
`SingleApplication` constructor. The default is `false` meaning no Secondary
Instances. Here is an example of how you would start a Secondary Instance send
a message with the command line arguments to the primary instance and then shut
down.
```cpp
int main(int argc, char *argv[])
{
SingleApplication app( argc, argv, true );
if( app.isSecondary() ) {
app.sendMessage( app.arguments().join(' ')).toUtf8() );
app.exit( 0 );
}
return app.exec();
}
```
*__Note:__ A secondary instance won't cause the emission of the
`instanceStarted()` signal by default. See `SingleApplication::Mode` for more
details.*
You can check whether your instance is a primary or secondary with the following
methods:
```cpp
app.isPrimary();
// or
app.isSecondary();
```
*__Note:__ If your Primary Instance is terminated a newly launched instance
will replace the Primary one even if the Secondary flag has been set.*
API
---
### Members
```cpp
SingleApplication::SingleApplication( int &argc, char *argv[], bool allowSecondary = false, Options options = Mode::User, int timeout = 100 )
```
Depending on whether `allowSecondary` is set, this constructor may terminate
your app if there is already a primary instance running. Additional `Options`
can be specified to set whether the SingleApplication block should work
user-wide or system-wide. Additionally the `Mode::SecondaryNotification` may be
used to notify the primary instance whenever a secondary instance had been
started (disabled by default). `timeout` specifies the maximum time in
milliseconds to wait for blocking operations.
*__Note:__ `argc` and `argv` may be changed as Qt removes arguments that it
recognizes.*
*__Note:__ `Mode::SecondaryNotification` only works if set on both the primary
and the secondary instance.*
*__Note:__ Operating system can restrict the shared memory blocks to the same
user, in which case the User/System modes will have no effect and the block will
be user wide.*
---
```cpp
bool SingleApplication::sendMessage( QByteArray message, int timeout = 100 )
```
Sends `message` to the Primary Instance. Uses `timeout` as a the maximum timeout
in milliseconds for blocking functions
---
```cpp
bool SingleApplication::isPrimary()
```
Returns if the instance is the primary instance.
---
```cpp
bool SingleApplication::isSecondary()
```
Returns if the instance is a secondary instance.
---
```cpp
quint32 SingleApplication::instanceId()
```
Returns a unique identifier for the current instance.
---
```cpp
qint64 SingleApplication::primaryPid()
```
Returns the process ID (PID) of the primary instance.
### Signals
```cpp
void SingleApplication::instanceStarted()
```
Triggered whenever a new instance had been started, except for secondary
instances if the `Mode::SecondaryNotification` flag is not specified.
---
```cpp
void SingleApplication::receivedMessage( quint32 instanceId, QByteArray message )
```
Triggered whenever there is a message received from a secondary instance.
---
### Flags
```cpp
enum SingleApplication::Mode
```
* `Mode::User` - The SingleApplication block should apply user wide. This adds
user specific data to the key used for the shared memory and server name.
This is the default functionality.
* `Mode::System` – The SingleApplication block applies system-wide.
* `Mode::SecondaryNotification` – Whether to trigger `instanceStarted()` even
whenever secondary instances are started.
* `Mode::ExcludeAppPath` – Excludes the application path from the server name
(and memory block) hash.
* `Mode::ExcludeAppVersion` – Excludes the application version from the server
name (and memory block) hash.
*__Note:__ `Mode::SecondaryNotification` only works if set on both the primary
and the secondary instance.*
*__Note:__ Operating system can restrict the shared memory blocks to the same
user, in which case the User/System modes will have no effect and the block will
be user wide.*
---
Versioning
----------
Each major version introduces either very significant changes or is not
backwards compatible with the previous version. Minor versions only add
additional features, bug fixes or performance improvements and are backwards
compatible with the previous release. See [`CHANGELOG.md`](CHANGELOG.md) for
more details.
Implementation
--------------
The library is implemented with a QSharedMemory block which is thread safe and
guarantees a race condition will not occur. It also uses a QLocalSocket to
notify the main process that a new instance had been spawned and thus invoke the
`instanceStarted()` signal and for messaging the primary instance.
Additionally the library can recover from being forcefully killed on *nix
systems and will reset the memory block given that there are no other
instances running.
License
-------
This library and it's supporting documentation are released under
`The MIT License (MIT)` with the exception of the Qt calculator examples which
is distributed under the BSD license.

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Windows Specific Implementations
================================
Setting the foreground window
-----------------------------
In the `instanceStarted()` example in the `README` we demonstrated how an
application can bring it's primary instance window whenever a second copy
of the application is started.
On Windows the ability to bring the application windows to the foreground is
restricted, see [`AllowSetForegroundWindow()`][AllowSetForegroundWindow] for more
details.
The background process (the primary instance) can bring its windows to the
foreground if it is allowed by the current foreground process (the secondary
instance). To bypass this `SingleApplication` must be initialized with the
`allowSecondary` parameter set to `true` and the `options` parameter must
include `Mode::SecondaryNotification`, See `SingleApplication::Mode` for more
details.
Here is an example:
```cpp
if( app.isSecondary() ) {
// This API requires LIBS += User32.lib to be added to the project
AllowSetForegroundWindow( DWORD( app.primaryPid() ) );
}
if( app.isPrimary() ) {
QObject::connect(
&app,
&SingleApplication::instanceStarted,
this,
&App::instanceStarted
);
}
```
```cpp
void App::instanceStarted() {
QApplication::setActiveWindow( [window/widget to set to the foreground] );
}
```
[AllowSetForegroundWindow]: https://msdn.microsoft.com/en-us/library/windows/desktop/ms632668.aspx

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// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2018
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include <QtCore/QTime>
#include <QtCore/QThread>
#include <QtCore/QDateTime>
#include <QtCore/QByteArray>
#include <QtCore/QSharedMemory>
#include "singleapplication.h"
#include "singleapplication_p.h"
/**
* @brief Constructor. Checks and fires up LocalServer or closes the program
* if another instance already exists
* @param argc
* @param argv
* @param {bool} allowSecondaryInstances
*/
SingleApplication::SingleApplication(int &argc, char *argv[], const char* appName, bool allowSecondary, Options options, int timeout )
: app_t( argc, argv ), d_ptr( new SingleApplicationPrivate( this ) )
{
Q_D(SingleApplication);
#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
// On Android and iOS since the library is not supported fallback to
// standard QApplication behaviour by simply returning at this point.
qWarning() << "SingleApplication is not supported on Android and iOS systems.";
return;
#endif
// Store the current mode of the program
d->options = options;
// Generating an application ID used for identifying the shared memory
// block and QLocalServer
d->genBlockServerName(appName);
#ifdef Q_OS_UNIX
// By explicitly attaching it and then deleting it we make sure that the
// memory is deleted even after the process has crashed on Unix.
d->memory = new QSharedMemory( d->blockServerName );
d->memory->attach();
delete d->memory;
#endif
// Guarantee thread safe behaviour with a shared memory block.
d->memory = new QSharedMemory( d->blockServerName );
// Create a shared memory block
if( d->memory->create( sizeof( InstancesInfo ) ) ) {
// Initialize the shared memory block
d->memory->lock();
d->initializeMemoryBlock();
d->memory->unlock();
} else {
// Attempt to attach to the memory segment
if( ! d->memory->attach() ) {
qCritical() << "SingleApplication: Unable to attach to shared memory block.";
qCritical() << d->memory->errorString();
delete d;
::exit( EXIT_FAILURE );
}
}
InstancesInfo* inst = static_cast<InstancesInfo*>( d->memory->data() );
QTime time;
time.start();
// Make sure the shared memory block is initialised and in consistent state
while( true ) {
d->memory->lock();
if( d->blockChecksum() == inst->checksum ) break;
if( time.elapsed() > 5000 ) {
qWarning() << "SingleApplication: Shared memory block has been in an inconsistent state from more than 5s. Assuming primary instance failure.";
d->initializeMemoryBlock();
}
d->memory->unlock();
// Random sleep here limits the probability of a collision between two racing apps
qsrand( QDateTime::currentMSecsSinceEpoch() % std::numeric_limits<uint>::max() );
QThread::sleep( 8 + static_cast <unsigned long>( static_cast <float>( qrand() ) / RAND_MAX * 10 ) );
}
if( inst->primary == false) {
d->startPrimary();
d->memory->unlock();
return;
}
// Check if another instance can be started
if( allowSecondary ) {
inst->secondary += 1;
inst->checksum = d->blockChecksum();
d->instanceNumber = inst->secondary;
d->startSecondary();
if( d->options & Mode::SecondaryNotification ) {
d->connectToPrimary( timeout, SingleApplicationPrivate::SecondaryInstance );
}
d->memory->unlock();
return;
}
d->memory->unlock();
d->connectToPrimary( timeout, SingleApplicationPrivate::NewInstance );
delete d;
::exit( EXIT_SUCCESS );
}
/**
* @brief Destructor
*/
SingleApplication::~SingleApplication()
{
Q_D(SingleApplication);
delete d;
}
bool SingleApplication::isPrimary()
{
Q_D(SingleApplication);
return d->server != nullptr;
}
bool SingleApplication::isSecondary()
{
Q_D(SingleApplication);
return d->server == nullptr;
}
quint32 SingleApplication::instanceId()
{
Q_D(SingleApplication);
return d->instanceNumber;
}
qint64 SingleApplication::primaryPid()
{
Q_D(SingleApplication);
return d->primaryPid();
}
bool SingleApplication::sendMessage( QByteArray message, int timeout )
{
Q_D(SingleApplication);
// Nobody to connect to
if( isPrimary() ) return false;
// Make sure the socket is connected
d->connectToPrimary( timeout, SingleApplicationPrivate::Reconnect );
d->socket->write( message );
bool dataWritten = d->socket->waitForBytesWritten( timeout );
d->socket->flush();
return dataWritten;
}

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// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2018
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#ifndef SINGLE_APPLICATION_H
#define SINGLE_APPLICATION_H
#include <QtCore/QtGlobal>
#include <QtNetwork/QLocalSocket>
#ifndef QAPPLICATION_CLASS
#define QAPPLICATION_CLASS QCoreApplication
#endif
#include QT_STRINGIFY(QAPPLICATION_CLASS)
class SingleApplicationPrivate;
/**
* @brief The SingleApplication class handles multiple instances of the same
* Application
* @see QCoreApplication
*/
class SingleApplication : public QAPPLICATION_CLASS
{
Q_OBJECT
typedef QAPPLICATION_CLASS app_t;
public:
/**
* @brief Mode of operation of SingleApplication.
* Whether the block should be user-wide or system-wide and whether the
* primary instance should be notified when a secondary instance had been
* started.
* @note Operating system can restrict the shared memory blocks to the same
* user, in which case the User/System modes will have no effect and the
* block will be user wide.
* @enum
*/
enum Mode {
User = 1 << 0,
System = 1 << 1,
SecondaryNotification = 1 << 2,
ExcludeAppVersion = 1 << 3,
ExcludeAppPath = 1 << 4
};
Q_DECLARE_FLAGS(Options, Mode)
/**
* @brief Intitializes a SingleApplication instance with argc command line
* arguments in argv
* @arg {int &} argc - Number of arguments in argv
* @arg {const char *[]} argv - Supplied command line arguments
* @arg {bool} allowSecondary - Whether to start the instance as secondary
* if there is already a primary instance.
* @arg {Mode} mode - Whether for the SingleApplication block to be applied
* User wide or System wide.
* @arg {int} timeout - Timeout to wait in milliseconds.
* @note argc and argv may be changed as Qt removes arguments that it
* recognizes
* @note Mode::SecondaryNotification only works if set on both the primary
* instance and the secondary instance.
* @note The timeout is just a hint for the maximum time of blocking
* operations. It does not guarantee that the SingleApplication
* initialisation will be completed in given time, though is a good hint.
* Usually 4*timeout would be the worst case (fail) scenario.
* @see See the corresponding QAPPLICATION_CLASS constructor for reference
*/
explicit SingleApplication(int &argc, char *argv[], const char *appName = "SingleApplication", bool allowSecondary = false, Options options = Mode::User, int timeout = 1000 );
~SingleApplication();
/**
* @brief Returns if the instance is the primary instance
* @returns {bool}
*/
bool isPrimary();
/**
* @brief Returns if the instance is a secondary instance
* @returns {bool}
*/
bool isSecondary();
/**
* @brief Returns a unique identifier for the current instance
* @returns {qint32}
*/
quint32 instanceId();
/**
* @brief Returns the process ID (PID) of the primary instance
* @returns {qint64}
*/
qint64 primaryPid();
/**
* @brief Sends a message to the primary instance. Returns true on success.
* @param {int} timeout - Timeout for connecting
* @returns {bool}
* @note sendMessage() will return false if invoked from the primary
* instance.
*/
bool sendMessage( QByteArray message, int timeout = 100 );
Q_SIGNALS:
void instanceStarted();
void receivedMessage( quint32 instanceId, QByteArray message );
private:
SingleApplicationPrivate *d_ptr;
Q_DECLARE_PRIVATE(SingleApplication)
};
Q_DECLARE_OPERATORS_FOR_FLAGS(SingleApplication::Options)
#endif // SINGLE_APPLICATION_H

19
3rd-parties/SingleApplication/singleapplication.pri
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@ -1,19 +0,0 @@
QT += core network
CONFIG += c++11
HEADERS += $$PWD/singleapplication.h \
$$PWD/singleapplication_p.h
SOURCES += $$PWD/singleapplication.cpp \
$$PWD/singleapplication_p.cpp
INCLUDEPATH += $$PWD
win32 {
msvc:LIBS += Advapi32.lib
gcc:LIBS += -ladvapi32
}
DISTFILES += \
$$PWD/README.md \
$$PWD/CHANGELOG.md \
$$PWD/Windows.md

407
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// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2018
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// W A R N I N G !!!
// -----------------
//
// This file is not part of the SingleApplication API. It is used purely as an
// implementation detail. This header file may change from version to
// version without notice, or may even be removed.
//
#include <cstdlib>
#include <cstddef>
#include <QtCore/QDir>
#include <QtCore/QByteArray>
#include <QtCore/QDataStream>
#include <QtCore/QCryptographicHash>
#include <QtNetwork/QLocalServer>
#include <QtNetwork/QLocalSocket>
#include "singleapplication.h"
#include "singleapplication_p.h"
#ifdef Q_OS_UNIX
#include <unistd.h>
#include <sys/types.h>
#include <pwd.h>
#endif
#ifdef Q_OS_WIN
#include <windows.h>
#include <lmcons.h>
#endif
SingleApplicationPrivate::SingleApplicationPrivate( SingleApplication *q_ptr )
: q_ptr( q_ptr )
{
server = nullptr;
socket = nullptr;
memory = nullptr;
instanceNumber = -1;
}
SingleApplicationPrivate::~SingleApplicationPrivate()
{
if( socket != nullptr ) {
socket->close();
delete socket;
}
memory->lock();
InstancesInfo* inst = static_cast<InstancesInfo*>(memory->data());
if( server != nullptr ) {
server->close();
delete server;
inst->primary = false;
inst->primaryPid = -1;
inst->checksum = blockChecksum();
}
memory->unlock();
delete memory;
}
void SingleApplicationPrivate::genBlockServerName(const char* appName)
{
QCryptographicHash appData( QCryptographicHash::Sha256 );
appData.addData( appName, 17 );
appData.addData( SingleApplication::app_t::applicationName().toUtf8() );
appData.addData( SingleApplication::app_t::organizationName().toUtf8() );
appData.addData( SingleApplication::app_t::organizationDomain().toUtf8() );
if( ! (options & SingleApplication::Mode::ExcludeAppVersion) ) {
appData.addData( SingleApplication::app_t::applicationVersion().toUtf8() );
}
if( ! (options & SingleApplication::Mode::ExcludeAppPath) ) {
#ifdef Q_OS_WIN
appData.addData( SingleApplication::app_t::applicationFilePath().toLower().toUtf8() );
#else
appData.addData( SingleApplication::app_t::applicationFilePath().toUtf8() );
#endif
}
// User level block requires a user specific data in the hash
if( options & SingleApplication::Mode::User ) {
#ifdef Q_OS_WIN
wchar_t username [ UNLEN + 1 ];
// Specifies size of the buffer on input
DWORD usernameLength = UNLEN + 1;
if( GetUserNameW( username, &usernameLength ) ) {
appData.addData( QString::fromWCharArray(username).toUtf8() );
} else {
appData.addData( qgetenv("USERNAME") );
}
#endif
#ifdef Q_OS_UNIX
QByteArray username;
uid_t uid = geteuid();
struct passwd *pw = getpwuid(uid);
if( pw ) {
username = pw->pw_name;
}
if( username.isEmpty() ) {
username = qgetenv("USER");
}
appData.addData(username);
#endif
}
appData.addData(qgetenv("DISPLAY"));
// Replace the backslash in RFC 2045 Base64 [a-zA-Z0-9+/=] to comply with
// server naming requirements.
blockServerName = appData.result().toBase64().replace("/", "_");
}
void SingleApplicationPrivate::initializeMemoryBlock()
{
InstancesInfo* inst = static_cast<InstancesInfo*>( memory->data() );
inst->primary = false;
inst->secondary = 0;
inst->primaryPid = -1;
inst->checksum = blockChecksum();
}
void SingleApplicationPrivate::startPrimary()
{
Q_Q(SingleApplication);
// Successful creation means that no main process exists
// So we start a QLocalServer to listen for connections
QLocalServer::removeServer( blockServerName );
server = new QLocalServer();
// Restrict access to the socket according to the
// SingleApplication::Mode::User flag on User level or no restrictions
if( options & SingleApplication::Mode::User ) {
server->setSocketOptions( QLocalServer::UserAccessOption );
} else {
server->setSocketOptions( QLocalServer::WorldAccessOption );
}
server->listen( blockServerName );
QObject::connect(
server,
&QLocalServer::newConnection,
this,
&SingleApplicationPrivate::slotConnectionEstablished
);
// Reset the number of connections
InstancesInfo* inst = static_cast <InstancesInfo*>( memory->data() );
inst->primary = true;
inst->primaryPid = q->applicationPid();
inst->checksum = blockChecksum();
instanceNumber = 0;
}
void SingleApplicationPrivate::startSecondary()
{
}
void SingleApplicationPrivate::connectToPrimary( int msecs, ConnectionType connectionType )
{
// Connect to the Local Server of the Primary Instance if not already
// connected.
if( socket == nullptr ) {
socket = new QLocalSocket();
}
// If already connected - we are done;
if( socket->state() == QLocalSocket::ConnectedState )
return;
// If not connect
if( socket->state() == QLocalSocket::UnconnectedState ||
socket->state() == QLocalSocket::ClosingState ) {
socket->connectToServer( blockServerName );
}
// Wait for being connected
if( socket->state() == QLocalSocket::ConnectingState ) {
socket->waitForConnected( msecs );
}
// Initialisation message according to the SingleApplication protocol
if( socket->state() == QLocalSocket::ConnectedState ) {
// Notify the parent that a new instance had been started;
QByteArray initMsg;
QDataStream writeStream(&initMsg, QIODevice::WriteOnly);
#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
writeStream.setVersion(QDataStream::Qt_5_6);
#endif
writeStream << blockServerName.toLatin1();
writeStream << static_cast<quint8>(connectionType);
writeStream << instanceNumber;
quint16 checksum = qChecksum(initMsg.constData(), static_cast<quint32>(initMsg.length()));
writeStream << checksum;
// The header indicates the message length that follows
QByteArray header;
QDataStream headerStream(&header, QIODevice::WriteOnly);
#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
headerStream.setVersion(QDataStream::Qt_5_6);
#endif
headerStream << static_cast <quint64>( initMsg.length() );
socket->write( header );
socket->write( initMsg );
socket->flush();
socket->waitForBytesWritten( msecs );
}
}
quint16 SingleApplicationPrivate::blockChecksum()
{
return qChecksum(
static_cast <const char *>( memory->data() ),
offsetof( InstancesInfo, checksum )
);
}
qint64 SingleApplicationPrivate::primaryPid()
{
qint64 pid;
memory->lock();
InstancesInfo* inst = static_cast<InstancesInfo*>( memory->data() );
pid = inst->primaryPid;
memory->unlock();
return pid;
}
/**
* @brief Executed when a connection has been made to the LocalServer
*/
void SingleApplicationPrivate::slotConnectionEstablished()
{
QLocalSocket *nextConnSocket = server->nextPendingConnection();
connectionMap.insert(nextConnSocket, ConnectionInfo());
QObject::connect(nextConnSocket, &QLocalSocket::aboutToClose,
[nextConnSocket, this]() {
auto &info = connectionMap[nextConnSocket];
Q_EMIT this->slotClientConnectionClosed( nextConnSocket, info.instanceId );
}
);
QObject::connect(nextConnSocket, &QLocalSocket::disconnected,
[nextConnSocket, this]() {
connectionMap.remove(nextConnSocket);
nextConnSocket->deleteLater();
}
);
QObject::connect(nextConnSocket, &QLocalSocket::readyRead,
[nextConnSocket, this]() {
auto &info = connectionMap[nextConnSocket];
switch(info.stage) {
case StageHeader:
readInitMessageHeader(nextConnSocket);
break;
case StageBody:
readInitMessageBody(nextConnSocket);
break;
case StageConnected:
Q_EMIT this->slotDataAvailable( nextConnSocket, info.instanceId );
break;
default:
break;
};
}
);
}
void SingleApplicationPrivate::readInitMessageHeader( QLocalSocket *sock )
{
if (!connectionMap.contains( sock )) {
return;
}
if( sock->bytesAvailable() < ( qint64 )sizeof( quint64 ) ) {
return;
}
QDataStream headerStream( sock );
#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
headerStream.setVersion( QDataStream::Qt_5_6 );
#endif
// Read the header to know the message length
quint64 msgLen = 0;
headerStream >> msgLen;
ConnectionInfo &info = connectionMap[sock];
info.stage = StageBody;
info.msgLen = msgLen;
if ( sock->bytesAvailable() >= (qint64) msgLen ) {
readInitMessageBody( sock );
}
}
void SingleApplicationPrivate::readInitMessageBody( QLocalSocket *sock )
{
Q_Q(SingleApplication);
if (!connectionMap.contains( sock )) {
return;
}
ConnectionInfo &info = connectionMap[sock];
if( sock->bytesAvailable() < ( qint64 )info.msgLen ) {
return;
}
// Read the message body
QByteArray msgBytes = sock->read(info.msgLen);
QDataStream readStream(msgBytes);
#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
readStream.setVersion( QDataStream::Qt_5_6 );
#endif
// server name
QByteArray latin1Name;
readStream >> latin1Name;
// connection type
ConnectionType connectionType = InvalidConnection;
quint8 connTypeVal = InvalidConnection;
readStream >> connTypeVal;
connectionType = static_cast <ConnectionType>( connTypeVal );
// instance id
quint32 instanceId = 0;
readStream >> instanceId;
// checksum
quint16 msgChecksum = 0;
readStream >> msgChecksum;
const quint16 actualChecksum = qChecksum( msgBytes.constData(), static_cast<quint32>( msgBytes.length() - sizeof( quint16 ) ) );
bool isValid = readStream.status() == QDataStream::Ok &&
QLatin1String(latin1Name) == blockServerName &&
msgChecksum == actualChecksum;
if( !isValid ) {
sock->close();
return;
}
info.instanceId = instanceId;
info.stage = StageConnected;
if( connectionType == NewInstance ||
( connectionType == SecondaryInstance &&
options & SingleApplication::Mode::SecondaryNotification ) )
{
Q_EMIT q->instanceStarted();
}
if (sock->bytesAvailable() > 0) {
Q_EMIT this->slotDataAvailable( sock, instanceId );
}
}
void SingleApplicationPrivate::slotDataAvailable( QLocalSocket *dataSocket, quint32 instanceId )
{
Q_Q(SingleApplication);
Q_EMIT q->receivedMessage( instanceId, dataSocket->readAll() );
}
void SingleApplicationPrivate::slotClientConnectionClosed( QLocalSocket *closedSocket, quint32 instanceId )
{
if( closedSocket->bytesAvailable() > 0 )
Q_EMIT slotDataAvailable( closedSocket, instanceId );
}

99
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@ -1,99 +0,0 @@
// The MIT License (MIT)
//
// Copyright (c) Itay Grudev 2015 - 2016
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// W A R N I N G !!!
// -----------------
//
// This file is not part of the SingleApplication API. It is used purely as an
// implementation detail. This header file may change from version to
// version without notice, or may even be removed.
//
#ifndef SINGLEAPPLICATION_P_H
#define SINGLEAPPLICATION_P_H
#include <QtCore/QSharedMemory>
#include <QtNetwork/QLocalServer>
#include <QtNetwork/QLocalSocket>
#include "singleapplication.h"
struct InstancesInfo {
bool primary;
quint32 secondary;
qint64 primaryPid;
quint16 checksum;
};
struct ConnectionInfo {
explicit ConnectionInfo() :
msgLen(0), instanceId(0), stage(0) {}
qint64 msgLen;
quint32 instanceId;
quint8 stage;
};
class SingleApplicationPrivate : public QObject {
Q_OBJECT
public:
enum ConnectionType : quint8 {
InvalidConnection = 0,
NewInstance = 1,
SecondaryInstance = 2,
Reconnect = 3
};
enum ConnectionStage : quint8 {
StageHeader = 0,
StageBody = 1,
StageConnected = 2,
};
Q_DECLARE_PUBLIC(SingleApplication)
SingleApplicationPrivate( SingleApplication *q_ptr );
~SingleApplicationPrivate();
void genBlockServerName(const char *appName);
void initializeMemoryBlock();
void startPrimary();
void startSecondary();
void connectToPrimary(int msecs, ConnectionType connectionType );
quint16 blockChecksum();
qint64 primaryPid();
void readInitMessageHeader(QLocalSocket *socket);
void readInitMessageBody(QLocalSocket *socket);
SingleApplication *q_ptr;
QSharedMemory *memory;
QLocalSocket *socket;
QLocalServer *server;
quint32 instanceNumber;
QString blockServerName;
SingleApplication::Options options;
QMap<QLocalSocket*, ConnectionInfo> connectionMap;
public Q_SLOTS:
void slotConnectionEstablished();
void slotDataAvailable( QLocalSocket*, quint32 );
void slotClientConnectionClosed( QLocalSocket*, quint32 );
};
#endif // SINGLEAPPLICATION_P_H

13
3rd-parties/qtsingleapplication/CMakeLists.txt Normal file
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cmake_minimum_required(VERSION 3.16)
project(qtsingleapplication)
find_package(Qt5 COMPONENTS
Core Gui Widgets Network
REQUIRED)
include_directories(src)
set(SRCS src/qtsingleapplication.h src/qtsingleapplication.cpp src/qtlocalpeer.h src/qtlocalpeer.cpp)
add_library(${PROJECT_NAME} STATIC ${SRCS})
target_include_directories(${PROJECT_NAME} PRIVATE src)
target_link_libraries(${PROJECT_NAME} PRIVATE Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Network)

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INSTALLATION INSTRUCTIONS
These instructions refer to the package you are installing as
some-package.tar.gz or some-package.zip. The .zip file is intended for use
on Windows.
The directory you choose for the installation will be referred to as
your-install-dir.
Note to Qt Visual Studio Integration users: In the instructions below,
instead of building from command line with nmake, you can use the menu
command 'Qt->Open Solution from .pro file' on the .pro files in the
example and plugin directories, and then build from within Visual
Studio.
Unpacking and installation
--------------------------
1. Unpacking the archive (if you have not done so already).
On Unix and Mac OS X (in a terminal window):
cd your-install-dir
gunzip some-package.tar.gz
tar xvf some-package.tar
This creates the subdirectory some-package containing the files.
On Windows:
Unpack the .zip archive by right-clicking it in explorer and
choosing "Extract All...". If your version of Windows does not
have zip support, you can use the infozip tools available
from www.info-zip.org.
If you are using the infozip tools (in a command prompt window):
cd your-install-dir
unzip some-package.zip
2. Configuring the package.
The configure script is called "configure" on unix/mac and
"configure.bat" on Windows. It should be run from a command line
after cd'ing to the package directory.
You can choose whether you want to use the component by including
its source code directly into your project, or build the component
as a dynamic shared library (DLL) that is loaded into the
application at run-time. The latter may be preferable for
technical or licensing (LGPL) reasons. If you want to build a DLL,
run the configure script with the argument "-library". Also see
the note about usage below.
(Components that are Qt plugins, e.g. styles and image formats,
are by default built as a plugin DLL.)
The configure script will prompt you in some cases for further
information. Answer these questions and carefully read the license text
before accepting the license conditions. The package cannot be used if
you do not accept the license conditions.
3. Building the component and examples (when required).
If a DLL is to be built, or if you would like to build the
examples, next give the commands
qmake
make [or nmake if your are using Microsoft Visual C++]
The example program(s) can be found in the directory called
"examples" or "example".
Components that are Qt plugins, e.g. styles and image formats, are
ready to be used as soon as they are built, so the rest of this
installation instruction can be skipped.
4. Building the Qt Designer plugin (optional).
Some of the widget components are provided with plugins for Qt
Designer. To build and install the plugin, cd into the
some-package/plugin directory and give the commands
qmake
make [or nmake if your are using Microsoft Visual C++]
Restart Qt Designer to make it load the new widget plugin.
Note: If you are using the built-in Qt Designer from the Qt Visual
Studio Integration, you will need to manually copy the plugin DLL
file, i.e. copy
%QTDIR%\plugins\designer\some-component.dll
to the Qt Visual Studio Integration plugin path, typically:
C:\Program Files\Trolltech\Qt VS Integration\plugins
Note: If you for some reason are using a Qt Designer that is built
in debug mode, you will need to build the plugin in debug mode
also. Edit the file plugin.pro in the plugin directory, changing
'release' to 'debug' in the CONFIG line, before running qmake.
Solutions components are intended to be used directly from the package
directory during development, so there is no 'make install' procedure.
Using a component in your project
---------------------------------
To use this component in your project, add the following line to the
project's .pro file (or do the equivalent in your IDE):
include(your-install-dir/some-package/src/some-package.pri)
This adds the package's sources and headers to the SOURCES and HEADERS
project variables respectively (or, if the component has been
configured as a DLL, it adds that library to the LIBS variable), and
updates INCLUDEPATH to contain the package's src
directory. Additionally, the .pri file may include some dependencies
needed by the package.
To include a header file from the package in your sources, you can now
simply use:
#include <SomeClass>
or alternatively, in pre-Qt 4 style:
#include <some-class.h>
Refer to the documentation to see the classes and headers this
components provides.
Install documentation (optional)
--------------------------------
The HTML documentation for the package's classes is located in the
your-install-dir/some-package/doc/html/index.html. You can open this
file and read the documentation with any web browser.
To install the documentation into Qt Assistant (for Qt version 4.4 and
later):
1. In Assistant, open the Edit->Preferences dialog and choose the
Documentation tab. Click the Add... button and select the file
your-install-dir/some-package/doc/html/some-package.qch
For Qt versions prior to 4.4, do instead the following:
1. The directory your-install-dir/some-package/doc/html contains a
file called some-package.dcf. Execute the following commands in a
shell, command prompt or terminal window:
cd your-install-dir/some-package/doc/html/
assistant -addContentFile some-package.dcf
The next time you start Qt Assistant, you can access the package's
documentation.
Removing the documentation from assistant
-----------------------------------------
If you have installed the documentation into Qt Assistant, and want to uninstall it, do as follows, for Qt version 4.4 and later:
1. In Assistant, open the Edit->Preferences dialog and choose the
Documentation tab. In the list of Registered Documentation, select
the item com.nokia.qtsolutions.some-package_version, and click
the Remove button.
For Qt versions prior to 4.4, do instead the following:
1. The directory your-install-dir/some-package/doc/html contains a
file called some-package.dcf. Execute the following commands in a
shell, command prompt or terminal window:
cd your-install-dir/some-package/doc/html/
assistant -removeContentFile some-package.dcf
Using the component as a DLL
----------------------------
1. Normal components
The shared library (DLL) is built and placed in the
some-package/lib directory. It is intended to be used directly
from there during development. When appropriate, both debug and
release versions are built, since the run-time linker will in some
cases refuse to load a debug-built DLL into a release-built
application or vice versa.
The following steps are taken by default to help the dynamic
linker to locate the DLL at run-time (during development):
Unix: The some-package.pri file will add linker instructions to
add the some-package/lib directory to the rpath of the
executable. (When distributing, or if your system does not support
rpath, you can copy the shared library to another place that is
searched by the dynamic linker, e.g. the "lib" directory of your
Qt installation.)
Mac: The full path to the library is hardcoded into the library
itself, from where it is copied into the executable at link time,
and ready by the dynamic linker at run-time. (When distributing,
you will want to edit these hardcoded paths in the same way as for
the Qt DLLs. Refer to the document "Deploying an Application on
Mac OS X" in the Qt Reference Documentation.)
Windows: the .dll file(s) are copied into the "bin" directory of
your Qt installation. The Qt installation will already have set up
that directory to be searched by the dynamic linker.
2. Plugins
For Qt Solutions plugins (e.g. image formats), both debug and
release versions of the plugin are built by default when
appropriate, since in some cases the release Qt library will not
load a debug plugin, and vice versa. The plugins are automatically
copied into the plugins directory of your Qt installation when
built, so no further setup is required.
Plugins may also be built statically, i.e. as a library that will be
linked into your application executable, and so will not need to
be redistributed as a separate plugin DLL to end users. Static
building is required if Qt itself is built statically. To do it,
just add "static" to the CONFIG variable in the plugin/plugin.pro
file before building. Refer to the "Static Plugins" section in the
chapter "How to Create Qt Plugins" for explanation of how to use a
static plugin in your application. The source code of the example
program(s) will also typically contain the relevant instructions
as comments.
Uninstalling
------------
The following command will remove any fils that have been
automatically placed outside the package directory itself during
installation and building
make distclean [or nmake if your are using Microsoft Visual C++]
If Qt Assistant documentation or Qt Designer plugins have been
installed, they can be uninstalled manually, ref. above.
Enjoy! :)
- The Qt Solutions Team.

1
3rd-parties/qtsingleapplication/QtLockedFile Normal file
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#include "qtlockedfile.h"

1
3rd-parties/qtsingleapplication/QtSingleApplication Normal file
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#include "qtsingleapplication.h"

33
3rd-parties/qtsingleapplication/README.TXT Normal file
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Qt Solutions Component: Single Application
The QtSingleApplication component provides support for
applications that can be only started once per user.
Version history:
2.0: - Version 1.3 ported to Qt 4.
2.1: - Fix compilation problem on Mac.
2.2: - Really fix the Mac compilation problem.
- Mac: fix crash due to wrong object releasing.
- Mac: Fix memory leak.
2.3: - Windows: Force creation of internal widget to make it work
with Qt 4.2.
2.4: - Fix the system for automatic window raising on message
reception. NOTE: minor API change.
2.5: - Mac: Fix isRunning() to work and report correctly.
2.6: - - initialize() is now obsolete, no longer necessary to call
it
- - Fixed race condition where multiple instances migth be started
- - QtSingleCoreApplication variant provided for non-GUI (console)
usage
- Complete reimplementation. Visible changes:
- LGPL release.

13
3rd-parties/qtsingleapplication/buildlib/buildlib.pro Normal file
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TEMPLATE=lib
CONFIG += qt dll qtsingleapplication-buildlib
mac:CONFIG += absolute_library_soname
win32|mac:!wince*:!win32-msvc:!macx-xcode:CONFIG += debug_and_release build_all
include(../src/qtsingleapplication.pri)
TARGET = $$QTSINGLEAPPLICATION_LIBNAME
DESTDIR = $$QTSINGLEAPPLICATION_LIBDIR
win32 {
DLLDESTDIR = $$[QT_INSTALL_BINS]
QMAKE_DISTCLEAN += $$[QT_INSTALL_BINS]\\$${QTSINGLEAPPLICATION_LIBNAME}.dll
}
target.path = $$DESTDIR
INSTALLS += target

14
3rd-parties/qtsingleapplication/common.pri Normal file
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exists(config.pri):infile(config.pri, SOLUTIONS_LIBRARY, yes): CONFIG += qtsingleapplication-uselib
TEMPLATE += fakelib
greaterThan(QT_MAJOR_VERSION, 5)|\
if(equals(QT_MAJOR_VERSION, 5):greaterThan(QT_MINOR_VERSION, 4))|\
if(equals(QT_MAJOR_VERSION, 5):equals(QT_MINOR_VERSION, 4):greaterThan(QT_PATCH_VERSION, 1)) {
QTSINGLEAPPLICATION_LIBNAME = $$qt5LibraryTarget(QtSolutions_SingleApplication-head)
} else {
QTSINGLEAPPLICATION_LIBNAME = $$qtLibraryTarget(QtSolutions_SingleApplication-head)
}
TEMPLATE -= fakelib
QTSINGLEAPPLICATION_LIBDIR = $$PWD/lib
unix:qtsingleapplication-uselib:!qtsingleapplication-buildlib:QMAKE_RPATHDIR += $$QTSINGLEAPPLICATION_LIBDIR

25
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#!/bin/sh
if [ "x$1" != "x" -a "x$1" != "x-library" ]; then
echo "Usage: $0 [-library]"
echo
echo "-library: Build the component as a dynamic library (DLL). Default is to"
echo " include the component source code directly in the application."
echo
exit 0
fi
rm -f config.pri
if [ "x$1" = "x-library" ]; then
echo "Configuring to build this component as a dynamic library."
echo "SOLUTIONS_LIBRARY = yes" > config.pri
fi
echo
echo "This component is now configured."
echo
echo "To build the component library (if requested) and example(s),"
echo "run qmake and your make command."
echo
echo "To remove or reconfigure, run make distclean."
echo

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:: Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
:: SPDX-License-Identifier: BSD-3-Clause
@echo off
rem
rem "Main"
rem
if not "%1"=="" (
if not "%1"=="-library" (
call :PrintUsage
goto EOF
)
)
if exist config.pri. del config.pri
if "%1"=="-library" (
echo Configuring to build this component as a dynamic library.
echo SOLUTIONS_LIBRARY = yes > config.pri
)
echo .
echo This component is now configured.
echo .
echo To build the component library (if requested) and example(s),
echo run qmake and your make or nmake command.
echo .
echo To remove or reconfigure, run make (nmake) distclean.
echo .
goto EOF
:PrintUsage
echo Usage: configure.bat [-library]
echo .
echo -library: Build the component as a dynamic library (DLL). Default is to
echo include the component source directly in the application.
echo A DLL may be preferable for technical or licensing (LGPL) reasons.
echo .
goto EOF
:EOF

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th.largeheader {
border-width: 1px 0px 1px 0px;
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border-color: #444;
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p {
margin-left: 4px;
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}
a:link
{
color: #0046ad;
text-decoration: none
}
a:visited
{
color: #672967;
text-decoration: none
}
a.obsolete
{
color: #661100;
text-decoration: none
}
a.compat
{
color: #661100;
text-decoration: none
}
a.obsolete:visited
{
color: #995500;
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}
a.compat:visited
{
color: #995500;
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}
body
{
background: #ffffff;
color: black
}
table.generic, table.annotated
{
border-width: 1px;
border-color:#bbb;
border-style:solid;
border-collapse:collapse;
}
table td.memItemLeft {
width: 180px;
padding: 2px 0px 0px 8px;
margin: 4px;
border-width: 1px;
border-color: #E0E0E0;
border-style: none;
font-size: 100%;
white-space: nowrap
}
table td.memItemRight {
padding: 2px 8px 0px 8px;
margin: 4px;
border-width: 1px;
border-color: #E0E0E0;
border-style: none;
font-size: 100%;
}
table tr.odd {
background: #f0f0f0;
color: black;
}
table tr.even {
background: #e4e4e4;
color: black;
}
table.annotated th {
padding: 3px;
text-align: left
}
table.annotated td {
padding: 3px;
}
table tr pre
{
padding-top: 0px;
padding-bottom: 0px;
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tr.qt-style
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{
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table tr.qt-code pre
{
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border: #e7e7e7 1px solid;
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}

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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- index.qdoc -->
<head>
<title>Single Application</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1">&nbsp;&nbsp;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">Single Application<br /><span class="subtitle"></span>
</h1>
<a name="description"></a>
<h2>Description</h2>
<p>The <a href="qtsingleapplication.html">QtSingleApplication</a> component provides support for applications that can be only started once per user.</p>
<p>For some applications it is useful or even critical that they are started only once by any user. Future attempts to start the application should activate any already running instance, and possibly perform requested actions, e.g&#x2e; loading a file, in that instance.</p>
<p>The <a href="qtsingleapplication.html">QtSingleApplication</a> class provides an interface to detect a running instance, and to send command strings to that instance. For console (non-GUI) applications, the <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a> variant is provided, which avoids dependency on <a href="http://qt.nokia.com/doc/4.6/qtgui.html">QtGui</a>.</p>
<a name="classes"></a>
<h2>Classes</h2>
<ul>
<li><a href="qtsingleapplication.html">QtSingleApplication</a></li>
<li><a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a></li>
</ul>
<a name="examples"></a>
<h2>Examples</h2>
<ul>
<li><a href="qtsingleapplication-example-trivial.html">A Trivial Example</a></li>
<li><a href="qtsingleapplication-example-loader.html">Loading Documents</a></li>
<li><a href="qtsinglecoreapplication-example-console.html">A Non-GUI Example</a></li>
</ul>
<a name="tested-platforms"></a>
<h2>Tested platforms</h2>
<ul>
<li>Qt 4.4, 4.5 / Windows XP / MSVC.NET 2005</li>
<li>Qt 4.4, 4.5 / Linux / gcc</li>
<li>Qt 4.4, 4.5 / MacOS X 10.5 / gcc</li>
</ul>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="30%" align="left">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
<td width="30%" align="right"><div align="right">Qt Solutions</div></td>
</tr></table></div></address></body>
</html>

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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- loader.qdoc -->
<head>
<title>Loading Documents</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1">&nbsp;&nbsp;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">Loading Documents<br /><span class="subtitle"></span>
</h1>
<p>The application in this example loads or prints the documents passed as commandline parameters to further instances of this application.</p>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** You may use this file under the terms of the BSD license as follows:
**
** &quot;Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
**
****************************************************************************/</span>
#include &lt;qtsingleapplication.h&gt;
#include &lt;QtCore/QFile&gt;
#include &lt;QtGui/QMainWindow&gt;
#include &lt;QtGui/QPrinter&gt;
#include &lt;QtGui/QPainter&gt;
#include &lt;QtGui/QTextEdit&gt;
#include &lt;QtGui/QMdiArea&gt;
#include &lt;QtCore/QTextStream&gt;
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void handleMessage(const QString&amp; message);
signals:
void needToShow();
private:
QMdiArea *workspace;
};</pre>
<p>The user interface in this application is a <a href="http://qt.nokia.com/doc/4.6/qmainwindow.html">QMainWindow</a> subclass with a <a href="http://qt.nokia.com/doc/4.6/qmdiarea.html">QMdiArea</a> as the central widget. It implements a slot <tt>handleMessage()</tt> that will be connected to the messageReceived() signal of the <a href="qtsingleapplication.html">QtSingleApplication</a> class.</p>
<pre> MainWindow::MainWindow()
{
workspace = new QMdiArea(this);
setCentralWidget(workspace);
}</pre>
<p>The <a href="http://qt.nokia.com/doc/4.6/designer-to-know.html">MainWindow</a> constructor creates a minimal user interface.</p>
<pre> void MainWindow::handleMessage(const QString&amp; message)
{
enum Action {
Nothing,
Open,
Print
} action;
action = Nothing;
QString filename = message;
if (message.toLower().startsWith(&quot;/print &quot;)) {
filename = filename.mid(7);
action = Print;
} else if (!message.isEmpty()) {
action = Open;
}
if (action == Nothing) {
emit needToShow();
return;
}
QFile file(filename);
QString contents;
if (file.open(QIODevice::ReadOnly))
contents = file.readAll();
else
contents = &quot;[[Error: Could not load file &quot; + filename + &quot;]]&quot;;
QTextEdit *view = new QTextEdit;
view-&gt;setPlainText(contents);
switch(action) {</pre>
<p>The handleMessage() slot interprets the message passed in as a filename that can be prepended with <i>/print</i> to indicate that the file should just be printed rather than loaded.</p>
<pre> case Print:
{
QPrinter printer;
view-&gt;print(&amp;printer);
delete view;
}
break;
case Open:
{
workspace-&gt;addSubWindow(view);
view-&gt;setWindowTitle(message);
view-&gt;show();
emit needToShow();
}
break;
default:
break;
};
}</pre>
<p>Loading the file will also activate the window.</p>
<pre> #include &quot;main.moc&quot;
int main(int argc, char **argv)
{
QtSingleApplication instance(&quot;File loader QtSingleApplication example&quot;, argc, argv);
QString message;
for (int a = 1; a &lt; argc; ++a) {
message += argv[a];
if (a &lt; argc-1)
message += &quot; &quot;;
}
if (instance.sendMessage(message))
return 0;</pre>
<p>The <tt>main</tt> entry point function creates a <a href="qtsingleapplication.html">QtSingleApplication</a> object, and creates a message to send to a running instance of the application. If the message was sent successfully the process exits immediately.</p>
<pre> MainWindow mw;
mw.handleMessage(message);
mw.show();
QObject::connect(&amp;instance, SIGNAL(messageReceived(const QString&amp;)),
&amp;mw, SLOT(handleMessage(const QString&amp;)));
instance.setActivationWindow(&amp;mw, false);
QObject::connect(&amp;mw, SIGNAL(needToShow()), &amp;instance, SLOT(activateWindow()));
return instance.exec();
}</pre>
<p>If the message could not be sent the application starts up. Note that <tt>false</tt> is passed to the call to setActivationWindow() to prevent automatic activation for every message received, e.g&#x2e; when the application should just print a file. Instead, the message handling function determines whether activation is requested, and signals that by emitting the needToShow() signal. This is then simply connected directly to <a href="qtsingleapplication.html">QtSingleApplication</a>'s activateWindow() slot.</p>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="30%" align="left">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
<td width="30%" align="right"><div align="right">Qt Solutions</div></td>
</tr></table></div></address></body>
</html>

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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- trivial.qdoc -->
<head>
<title>A Trivial Example</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1">&nbsp;&nbsp;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">A Trivial Example<br /><span class="subtitle"></span>
</h1>
<p>The application in this example has a log-view that displays messages sent by further instances of the same application.</p>
<p>The example demonstrates the use of the <a href="qtsingleapplication.html">QtSingleApplication</a> class to detect and communicate with a running instance of the application using the sendMessage() API. The messageReceived() signal is used to display received messages in a <a href="http://qt.nokia.com/doc/4.6/qtextedit.html">QTextEdit</a> log.</p>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** You may use this file under the terms of the BSD license as follows:
**
** &quot;Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
**
****************************************************************************/</span>
#include &lt;qtsingleapplication.h&gt;
#include &lt;QtGui/QTextEdit&gt;
class TextEdit : public QTextEdit
{
Q_OBJECT
public:
TextEdit(QWidget *parent = 0)
: QTextEdit(parent)
{}
public slots:
void append(const QString &amp;str)
{
QTextEdit::append(str);
}
};
#include &quot;main.moc&quot;
int main(int argc, char **argv)
{
QtSingleApplication instance(argc, argv);</pre>
<p>The example has only the <tt>main</tt> entry point function. A <a href="qtsingleapplication.html">QtSingleApplication</a> object is created immediately.</p>
<pre> if (instance.sendMessage(&quot;Wake up!&quot;))
return 0;</pre>
<p>If another instance of this application is already running, sendMessage() will succeed, and this instance just exits immediately.</p>
<pre> TextEdit logview;
logview.setReadOnly(true);
logview.show();</pre>
<p>Otherwise the instance continues as normal and creates the user interface.</p>
<pre> instance.setActivationWindow(&amp;logview);
QObject::connect(&amp;instance, SIGNAL(messageReceived(const QString&amp;)),
&amp;logview, SLOT(append(const QString&amp;)));
return instance.exec();</pre>
<p>The <tt>logview</tt> object is also set as the application's activation window. Every time a message is received, the window will be raised and activated automatically.</p>
<p>The messageReceived() signal is also connected to the <a href="http://qt.nokia.com/doc/4.6/qtextedit.html">QTextEdit</a>'s append() slot. Every message received from further instances of this application will be displayed in the log.</p>
<p>Finally the event loop is entered.</p>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="30%" align="left">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
<td width="30%" align="right"><div align="right">Qt Solutions</div></td>
</tr></table></div></address></body>
</html>

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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- qtsingleapplication.cpp -->
<head>
<title>List of All Members for QtSingleApplication</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1">&nbsp;&nbsp;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">List of All Members for QtSingleApplication</h1>
<p>This is the complete list of members for <a href="qtsingleapplication.html">QtSingleApplication</a>, including inherited members.</p>
<p><table class="propsummary" width="100%" border="0" cellpadding="0" cellspacing="0">
<tr><td width="45%" valign="top"><ul>
<li><div class="fn">enum <b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#ColorSpec-enum">ColorSpec</a></b></div></li>
<li><div class="fn">enum <b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#Encoding-enum">Encoding</a></b></div></li>
<li><div class="fn">typedef <b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#EventFilter-typedef">EventFilter</a></b></div></li>
<li><div class="fn">typedef <b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#QS60MainApplicationFactory-typedef">QS60MainApplicationFactory</a></b></div></li>
<li><div class="fn">enum <b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#Type-enum">Type</a></b></div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#QtSingleApplication">QtSingleApplication</a></b> ( int &amp;, char **, bool )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#QtSingleApplication-2">QtSingleApplication</a></b> ( const QString &amp;, int &amp;, char ** )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#QtSingleApplication-3">QtSingleApplication</a></b> ( int &amp;, char **, Type )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#QtSingleApplication-4">QtSingleApplication</a></b> ( Display *, Qt::HANDLE, Qt::HANDLE )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#QtSingleApplication-5">QtSingleApplication</a></b> ( Display *, int &amp;, char **, Qt::HANDLE, Qt::HANDLE )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#QtSingleApplication-6">QtSingleApplication</a></b> ( Display *, const QString &amp;, int, char **, Qt::HANDLE, Qt::HANDLE )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#aboutQt">aboutQt</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#aboutToQuit">aboutToQuit</a></b> ()</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#activateWindow">activateWindow</a></b> ()</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#activationWindow">activationWindow</a></b> () const : QWidget *</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#activeModalWidget">activeModalWidget</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#activePopupWidget">activePopupWidget</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#activeWindow">activeWindow</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#addLibraryPath">addLibraryPath</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#alert">alert</a></b> ( QWidget *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#allWidgets">allWidgets</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationDirPath">applicationDirPath</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">applicationFilePath</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationName-prop">applicationName</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationPid">applicationPid</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationVersion-prop">applicationVersion</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#arguments">arguments</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#autoMaximizeThreshold-prop">autoMaximizeThreshold</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#autoSipEnabled-prop">autoSipEnabled</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#beep">beep</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#blockSignals">blockSignals</a></b> ( bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#changeOverrideCursor">changeOverrideCursor</a></b> ( const QCursor &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#childEvent">childEvent</a></b> ( QChildEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#children">children</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#clipboard">clipboard</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#closeAllWindows">closeAllWindows</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#closingDown">closingDown</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#colorSpec">colorSpec</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#commitData">commitData</a></b> ( QSessionManager &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#commitDataRequest">commitDataRequest</a></b> ( QSessionManager &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#connect">connect</a></b> ( const QObject *, const char *, const QObject *, const char *, Qt::ConnectionType )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#connect-2">connect</a></b> ( const QObject *, const char *, const char *, Qt::ConnectionType ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#connectNotify">connectNotify</a></b> ( const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#cursorFlashTime-prop">cursorFlashTime</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#customEvent">customEvent</a></b> ( QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#d_ptr-var">d_ptr</a></b> : </div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#deleteLater">deleteLater</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#desktop">desktop</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#desktopSettingsAware">desktopSettingsAware</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#destroyed">destroyed</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnect">disconnect</a></b> ( const QObject *, const char *, const QObject *, const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnect-2">disconnect</a></b> ( const char *, const QObject *, const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnect-3">disconnect</a></b> ( const QObject *, const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnectNotify">disconnectNotify</a></b> ( const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#doubleClickInterval-prop">doubleClickInterval</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#dumpObjectInfo">dumpObjectInfo</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#dumpObjectTree">dumpObjectTree</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#dynamicPropertyNames">dynamicPropertyNames</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#event">event</a></b> ( QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#eventFilter">eventFilter</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#exec">exec</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#exit">exit</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#filterEvent">filterEvent</a></b> ( void *, long * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#findChild">findChild</a></b> ( const QString &amp; ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#findChildren">findChildren</a></b> ( const QString &amp; ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#findChildren-2">findChildren</a></b> ( const QRegExp &amp; ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#flush">flush</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#focusChanged">focusChanged</a></b> ( QWidget *, QWidget * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#focusWidget">focusWidget</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#font">font</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#font-2">font</a></b> ( const QWidget * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#font-3">font</a></b> ( const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#fontDatabaseChanged">fontDatabaseChanged</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#fontMetrics">fontMetrics</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#globalStrut-prop">globalStrut</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#hasPendingEvents">hasPendingEvents</a></b> ()</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#id">id</a></b> () const : QString</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#inherits">inherits</a></b> ( const char * ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#inputContext">inputContext</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#installEventFilter">installEventFilter</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#installTranslator">installTranslator</a></b> ( QTranslator * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#instance">instance</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#isEffectEnabled">isEffectEnabled</a></b> ( Qt::UIEffect )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#isLeftToRight">isLeftToRight</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#isRightToLeft">isRightToLeft</a></b> ()</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#isRunning">isRunning</a></b> () : bool</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#isSessionRestored">isSessionRestored</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#isWidgetType">isWidgetType</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#keyboardInputDirection">keyboardInputDirection</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#keyboardInputInterval-prop">keyboardInputInterval</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#keyboardInputLocale">keyboardInputLocale</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#keyboardModifiers">keyboardModifiers</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#keypadNavigationEnabled">keypadNavigationEnabled</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#killTimer">killTimer</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#lastWindowClosed">lastWindowClosed</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#layoutDirection-prop">layoutDirection</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#libraryPaths">libraryPaths</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#macEventFilter">macEventFilter</a></b> ( EventHandlerCallRef, EventRef )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#messageReceived">messageReceived</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#metaObject">metaObject</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#mouseButtons">mouseButtons</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#moveToThread">moveToThread</a></b> ( QThread * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#navigationMode">navigationMode</a></b> ()</div></li>
</ul></td><td valign="top"><ul>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#notify">notify</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#objectName-prop">objectName</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#organizationDomain-prop">organizationDomain</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#organizationName-prop">organizationName</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#overrideCursor">overrideCursor</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#palette">palette</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#palette-2">palette</a></b> ( const QWidget * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#palette-3">palette</a></b> ( const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#parent">parent</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#postEvent">postEvent</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#postEvent-2">postEvent</a></b> ( QObject *, QEvent *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#processEvents">processEvents</a></b> ( QFlags&lt;QEventLoop::ProcessEventsFlag&gt; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#processEvents-2">processEvents</a></b> ( QFlags&lt;QEventLoop::ProcessEventsFlag&gt;, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#property">property</a></b> ( const char * ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#quit">quit</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#quitOnLastWindowClosed-prop">quitOnLastWindowClosed</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#qwsDecoration">qwsDecoration</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#qwsEventFilter">qwsEventFilter</a></b> ( QWSEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#qwsSetCustomColors">qwsSetCustomColors</a></b> ( QRgb *, int, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#qwsSetDecoration">qwsSetDecoration</a></b> ( QDecoration * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#qwsSetDecoration-2">qwsSetDecoration</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#receivers">receivers</a></b> ( const char * ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#removeEventFilter">removeEventFilter</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removeLibraryPath">removeLibraryPath</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removePostedEvents">removePostedEvents</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removePostedEvents-2">removePostedEvents</a></b> ( QObject *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removeTranslator">removeTranslator</a></b> ( QTranslator * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#restoreOverrideCursor">restoreOverrideCursor</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#saveState">saveState</a></b> ( QSessionManager &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#saveStateRequest">saveStateRequest</a></b> ( QSessionManager &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#sendEvent">sendEvent</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#sendMessage">sendMessage</a></b> ( const QString &amp;, int ) : bool</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#sendPostedEvents">sendPostedEvents</a></b> ( QObject *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#sendPostedEvents-2">sendPostedEvents</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#sender">sender</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#sessionId">sessionId</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#sessionKey">sessionKey</a></b> () const</div></li>
<li><div class="fn"><b><a href="qtsingleapplication.html#setActivationWindow">setActivationWindow</a></b> ( QWidget *, bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#setActiveWindow">setActiveWindow</a></b> ( QWidget * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationName-prop">setApplicationName</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationVersion-prop">setApplicationVersion</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#setAttribute">setAttribute</a></b> ( Qt::ApplicationAttribute, bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#autoMaximizeThreshold-prop">setAutoMaximizeThreshold</a></b> ( const int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#autoSipEnabled-prop">setAutoSipEnabled</a></b> ( const bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#setColorSpec">setColorSpec</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#cursorFlashTime-prop">setCursorFlashTime</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#setDesktopSettingsAware">setDesktopSettingsAware</a></b> ( bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#doubleClickInterval-prop">setDoubleClickInterval</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qapplication.html#setEffectEnabled">setEffectEnabled</a></b> ( Qt::UIEffect, bool )</div></li>
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<p><b>The following class members are obsolete.</b> They are provided to keep old source code working. We strongly advise against using them in new code.</p>
<p><ul><li><a href="qtsingleapplication.html">QtSingleApplication class reference</a></li></ul></p>
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<h3 class="fn"><a name="initialize"></a>void QtSingleApplication::initialize ( bool <i>dummy</i> = true )</h3>
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<p>The QtSingleApplication class provides an API to detect and communicate with running instances of an application. <a href="#details">More...</a></p>
<pre> #include &lt;QtSingleApplication&gt;</pre><p>Inherits <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a>.</p>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsingleapplication.html#QtSingleApplication">QtSingleApplication</a></b> ( int &amp; <i>argc</i>, char ** <i>argv</i>, bool <i>GUIenabled</i> = true )</td></tr>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsingleapplication.html#QtSingleApplication-3">QtSingleApplication</a></b> ( int &amp; <i>argc</i>, char ** <i>argv</i>, Type <i>type</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsingleapplication.html#QtSingleApplication-4">QtSingleApplication</a></b> ( Display * <i>dpy</i>, Qt::HANDLE <i>visual</i> = 0, Qt::HANDLE <i>cmap</i> = 0 )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsingleapplication.html#QtSingleApplication-5">QtSingleApplication</a></b> ( Display * <i>dpy</i>, int &amp; <i>argc</i>, char ** <i>argv</i>, Qt::HANDLE <i>visual</i> = 0, Qt::HANDLE <i>cmap</i> = 0 )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsingleapplication.html#QtSingleApplication-6">QtSingleApplication</a></b> ( Display * <i>dpy</i>, const QString &amp; <i>appId</i>, int <i>argc</i>, char ** <i>argv</i>, Qt::HANDLE <i>visual</i> = 0, Qt::HANDLE <i>cmap</i> = 0 )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QWidget * </td><td class="memItemRight" valign="bottom"><b><a href="qtsingleapplication.html#activationWindow">activationWindow</a></b> () const</td></tr>
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<li><div bar="2" class="fn"></div>29 public functions inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#public-functions">QObject</a></li>
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<li><div bar="2" class="fn"></div>7 public slots inherited from <a href="http://qt.nokia.com/doc/4.6/qapplication.html#public-slots">QApplication</a></li>
<li><div bar="2" class="fn"></div>1 public slot inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#public-slots">QCoreApplication</a></li>
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<h2>Signals</h2>
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<h3>Additional Inherited Members</h3>
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<li><div class="fn"></div>1 property inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#properties">QObject</a></li>
<li><div class="fn"></div>1 public type inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#public-variables">QObject</a></li>
<li><div class="fn"></div>73 static public members inherited from <a href="http://qt.nokia.com/doc/4.6/qapplication.html#static-public-members">QApplication</a></li>
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<li><div class="fn"></div>7 protected functions inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#protected-functions">QObject</a></li>
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<h2>Detailed Description</h2>
<p>The QtSingleApplication class provides an API to detect and communicate with running instances of an application.</p>
<p>This class allows you to create applications where only one instance should be running at a time. I.e&#x2e;, if the user tries to launch another instance, the already running instance will be activated instead. Another usecase is a client-server system, where the first started instance will assume the role of server, and the later instances will act as clients of that server.</p>
<p>By default, the full path of the executable file is used to determine whether two processes are instances of the same application. You can also provide an explicit identifier string that will be compared instead.</p>
<p>The application should create the QtSingleApplication object early in the startup phase, and call <a href="qtsingleapplication.html#isRunning">isRunning</a>() to find out if another instance of this application is already running. If <a href="qtsingleapplication.html#isRunning">isRunning</a>() returns false, it means that no other instance is running, and this instance has assumed the role as the running instance. In this case, the application should continue with the initialization of the application user interface before entering the event loop with <a href="http://qt.nokia.com/doc/4.6/qapplication.html#exec">exec</a>(), as normal.</p>
<p>The <a href="qtsingleapplication.html#messageReceived">messageReceived</a>() signal will be emitted when the running application receives messages from another instance of the same application. When a message is received it might be helpful to the user to raise the application so that it becomes visible. To facilitate this, QtSingleApplication provides the <a href="qtsingleapplication.html#setActivationWindow">setActivationWindow</a>() function and the <a href="qtsingleapplication.html#activateWindow">activateWindow</a>() slot.</p>
<p>If <a href="qtsingleapplication.html#isRunning">isRunning</a>() returns true, another instance is already running. It may be alerted to the fact that another instance has started by using the <a href="qtsingleapplication.html#sendMessage">sendMessage</a>() function. Also data such as startup parameters (e.g&#x2e; the name of the file the user wanted this new instance to open) can be passed to the running instance with this function. Then, the application should terminate (or enter client mode).</p>
<p>If <a href="qtsingleapplication.html#isRunning">isRunning</a>() returns true, but <a href="qtsingleapplication.html#sendMessage">sendMessage</a>() fails, that is an indication that the running instance is frozen.</p>
<p>Here's an example that shows how to convert an existing application to use QtSingleApplication. It is very simple and does not make use of all QtSingleApplication's functionality (see the examples for that).</p>
<pre><span class="comment"> // Original</span>
int main(int argc, char **argv)
{
QApplication app(argc, argv);
MyMainWidget mmw;
mmw.show();
return app.exec();
}
<span class="comment"> // Single instance</span>
int main(int argc, char **argv)
{
QtSingleApplication app(argc, argv);
if (app.isRunning())
return !app.sendMessage(someDataString);
MyMainWidget mmw;
app.setActivationWindow(&amp;mmw);
mmw.show();
return app.exec();
}</pre>
<p>Once this QtSingleApplication instance is destroyed (normally when the process exits or crashes), when the user next attempts to run the application this instance will not, of course, be encountered. The next instance to call <a href="qtsingleapplication.html#isRunning">isRunning</a>() or <a href="qtsingleapplication.html#sendMessage">sendMessage</a>() will assume the role as the new running instance.</p>
<p>For console (non-GUI) applications, <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a> may be used instead of this class, to avoid the dependency on the <a href="http://qt.nokia.com/doc/4.6/qtgui.html">QtGui</a> library.</p>
<p>See also <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a>.</p>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QtSingleApplication"></a>QtSingleApplication::QtSingleApplication ( int &amp; <i>argc</i>, char ** <i>argv</i>, bool <i>GUIenabled</i> = true )</h3>
<p>Creates a <a href="qtsingleapplication.html">QtSingleApplication</a> object. The application identifier will be <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">QCoreApplication::applicationFilePath</a>(). <i>argc</i>, <i>argv</i>, and <i>GUIenabled</i> are passed on to the QAppliation constructor.</p>
<p>If you are creating a console application (i.e&#x2e; setting <i>GUIenabled</i> to false), you may consider using <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a> instead.</p>
<h3 class="fn"><a name="QtSingleApplication-2"></a>QtSingleApplication::QtSingleApplication ( const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>appId</i>, int &amp; <i>argc</i>, char ** <i>argv</i> )</h3>
<p>Creates a <a href="qtsingleapplication.html">QtSingleApplication</a> object with the application identifier <i>appId</i>. <i>argc</i> and <i>argv</i> are passed on to the QAppliation constructor.</p>
<h3 class="fn"><a name="QtSingleApplication-3"></a>QtSingleApplication::QtSingleApplication ( int &amp; <i>argc</i>, char ** <i>argv</i>, <a href="http://qt.nokia.com/doc/4.6/qapplication.html#Type-enum">Type</a> <i>type</i> )</h3>
<p>Creates a <a href="qtsingleapplication.html">QtSingleApplication</a> object. The application identifier will be <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">QCoreApplication::applicationFilePath</a>(). <i>argc</i>, <i>argv</i>, and <i>type</i> are passed on to the QAppliation constructor.</p>
<h3 class="fn"><a name="QtSingleApplication-4"></a>QtSingleApplication::QtSingleApplication ( Display * <i>dpy</i>, <a href="http://qt.nokia.com/doc/4.6/qt.html#HANDLE-typedef">Qt::HANDLE</a> <i>visual</i> = 0, <a href="http://qt.nokia.com/doc/4.6/qt.html#HANDLE-typedef">Qt::HANDLE</a> <i>cmap</i> = 0 )</h3>
<p>Special constructor for X11, ref. the documentation of <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a>'s corresponding constructor. The application identifier will be <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">QCoreApplication::applicationFilePath</a>(). <i>dpy</i>, <i>visual</i>, and <i>cmap</i> are passed on to the <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a> constructor.</p>
<h3 class="fn"><a name="QtSingleApplication-5"></a>QtSingleApplication::QtSingleApplication ( Display * <i>dpy</i>, int &amp; <i>argc</i>, char ** <i>argv</i>, <a href="http://qt.nokia.com/doc/4.6/qt.html#HANDLE-typedef">Qt::HANDLE</a> <i>visual</i> = 0, <a href="http://qt.nokia.com/doc/4.6/qt.html#HANDLE-typedef">Qt::HANDLE</a> <i>cmap</i> = 0 )</h3>
<p>Special constructor for X11, ref. the documentation of <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a>'s corresponding constructor. The application identifier will be <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">QCoreApplication::applicationFilePath</a>(). <i>dpy</i>, <i>argc</i>, <i>argv</i>, <i>visual</i>, and <i>cmap</i> are passed on to the <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a> constructor.</p>
<h3 class="fn"><a name="QtSingleApplication-6"></a>QtSingleApplication::QtSingleApplication ( Display * <i>dpy</i>, const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>appId</i>, int <i>argc</i>, char ** <i>argv</i>, <a href="http://qt.nokia.com/doc/4.6/qt.html#HANDLE-typedef">Qt::HANDLE</a> <i>visual</i> = 0, <a href="http://qt.nokia.com/doc/4.6/qt.html#HANDLE-typedef">Qt::HANDLE</a> <i>cmap</i> = 0 )</h3>
<p>Special constructor for X11, ref. the documentation of <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a>'s corresponding constructor. The application identifier will be <i>appId</i>. <i>dpy</i>, <i>argc</i>, <i>argv</i>, <i>visual</i>, and <i>cmap</i> are passed on to the <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a> constructor.</p>
<h3 class="fn"><a name="activateWindow"></a>void QtSingleApplication::activateWindow ()&nbsp;&nbsp;<tt> [slot]</tt></h3>
<p>De-minimizes, raises, and activates this application's activation window. This function does nothing if no activation window has been set.</p>
<p>This is a convenience function to show the user that this application instance has been activated when he has tried to start another instance.</p>
<p>This function should typically be called in response to the <a href="qtsingleapplication.html#messageReceived">messageReceived</a>() signal. By default, that will happen automatically, if an activation window has been set.</p>
<p>See also <a href="qtsingleapplication.html#setActivationWindow">setActivationWindow</a>(), <a href="qtsingleapplication.html#messageReceived">messageReceived</a>(), and <a href="qtsingleapplication-obsolete.html#initialize" class="obsolete">initialize</a>().</p>
<h3 class="fn"><a name="activationWindow"></a><a href="http://qt.nokia.com/doc/4.6/qwidget.html">QWidget</a> * QtSingleApplication::activationWindow () const</h3>
<p>Returns the applications activation window if one has been set by calling <a href="qtsingleapplication.html#setActivationWindow">setActivationWindow</a>(), otherwise returns 0.</p>
<p>See also <a href="qtsingleapplication.html#setActivationWindow">setActivationWindow</a>().</p>
<h3 class="fn"><a name="id"></a><a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> QtSingleApplication::id () const</h3>
<p>Returns the application identifier. Two processes with the same identifier will be regarded as instances of the same application.</p>
<h3 class="fn"><a name="isRunning"></a>bool QtSingleApplication::isRunning ()</h3>
<p>Returns true if another instance of this application is running; otherwise false.</p>
<p>This function does not find instances of this application that are being run by a different user (on Windows: that are running in another session).</p>
<p>See also <a href="qtsingleapplication.html#sendMessage">sendMessage</a>().</p>
<h3 class="fn"><a name="messageReceived"></a>void QtSingleApplication::messageReceived ( const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>message</i> )&nbsp;&nbsp;<tt> [signal]</tt></h3>
<p>This signal is emitted when the current instance receives a <i>message</i> from another instance of this application.</p>
<p>See also <a href="qtsingleapplication.html#sendMessage">sendMessage</a>(), <a href="qtsingleapplication.html#setActivationWindow">setActivationWindow</a>(), and <a href="qtsingleapplication.html#activateWindow">activateWindow</a>().</p>
<h3 class="fn"><a name="sendMessage"></a>bool QtSingleApplication::sendMessage ( const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>message</i>, int <i>timeout</i> = 5000 )&nbsp;&nbsp;<tt> [slot]</tt></h3>
<p>Tries to send the text <i>message</i> to the currently running instance. The <a href="qtsingleapplication.html">QtSingleApplication</a> object in the running instance will emit the <a href="qtsingleapplication.html#messageReceived">messageReceived</a>() signal when it receives the message.</p>
<p>This function returns true if the message has been sent to, and processed by, the current instance. If there is no instance currently running, or if the running instance fails to process the message within <i>timeout</i> milliseconds, this function return false.</p>
<p>See also <a href="qtsingleapplication.html#isRunning">isRunning</a>() and <a href="qtsingleapplication.html#messageReceived">messageReceived</a>().</p>
<h3 class="fn"><a name="setActivationWindow"></a>void QtSingleApplication::setActivationWindow ( <a href="http://qt.nokia.com/doc/4.6/qwidget.html">QWidget</a> * <i>aw</i>, bool <i>activateOnMessage</i> = true )</h3>
<p>Sets the activation window of this application to <i>aw</i>. The activation window is the widget that will be activated by <a href="qtsingleapplication.html#activateWindow">activateWindow</a>(). This is typically the application's main window.</p>
<p>If <i>activateOnMessage</i> is true (the default), the window will be activated automatically every time a message is received, just prior to the <a href="qtsingleapplication.html#messageReceived">messageReceived</a>() signal being emitted.</p>
<p>See also <a href="qtsingleapplication.html#activationWindow">activationWindow</a>(), <a href="qtsingleapplication.html#activateWindow">activateWindow</a>(), and <a href="qtsingleapplication.html#messageReceived">messageReceived</a>().</p>
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<file>qtsingleapplication.html</file>
<file>index.html</file>
<file>qtsingleapplication-example-trivial.html</file>
<file>qtsinglecoreapplication.html</file>
<file>qtsingleapplication-example-loader.html</file>
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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- console.qdoc -->
<head>
<title>A non-GUI example</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1">&nbsp;&nbsp;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">A non-GUI example<br /><span class="subtitle"></span>
</h1>
<p>This example shows how to use the single-application functionality in a console application. It does not require the <tt>QtGui</tt> library at all.</p>
<p>The only differences from the GUI application usage demonstrated in the other examples are:</p>
<p>1) The <tt>.pro</tt> file should include <tt>qtsinglecoreapplication.pri</tt> instead of <tt>qtsingleapplication.pri</tt></p>
<p>2) The class name is <tt>QtSingleCoreApplication</tt> instead of <tt>QtSingleApplication</tt>.</p>
<p>3) No calls are made regarding window activation, for obvious reasons.</p>
<p>console.pro:</p>
<pre> TEMPLATE = app
CONFIG += console
SOURCES += main.cpp
include(../../src/qtsinglecoreapplication.pri)
QT -= gui</pre>
<p>main.cpp:</p>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** You may use this file under the terms of the BSD license as follows:
**
** &quot;Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.&quot;
**
****************************************************************************/</span>
#include &quot;qtsinglecoreapplication.h&quot;
#include &lt;QtCore/QDebug&gt;
void report(const QString&amp; msg)
{
qDebug(&quot;[%i] %s&quot;, (int)QCoreApplication::applicationPid(), qPrintable(msg));
}
class MainClass : public QObject
{
Q_OBJECT
public:
MainClass()
: QObject()
{}
public slots:
void handleMessage(const QString&amp; message)
{
report( &quot;Message received: \&quot;&quot; + message + &quot;\&quot;&quot;);
}
};
int main(int argc, char **argv)
{
report(&quot;Starting up&quot;);
QtSingleCoreApplication app(argc, argv);
if (app.isRunning()) {
QString msg(QString(&quot;Hi master, I am %1.&quot;).arg(QCoreApplication::applicationPid()));
bool sentok = app.sendMessage(msg, 2000);
QString rep(&quot;Another instance is running, so I will exit.&quot;);
rep += sentok ? &quot; Message sent ok.&quot; : &quot; Message sending failed; the other instance may be frozen.&quot;;
report(rep);
return 0;
} else {
report(&quot;No other instance is running; so I will.&quot;);
MainClass mainObj;
QObject::connect(&amp;app, SIGNAL(messageReceived(const QString&amp;)),
&amp;mainObj, SLOT(handleMessage(const QString&amp;)));
return app.exec();
}
}
#include &quot;main.moc&quot;</pre>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="30%" align="left">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
<td width="30%" align="right"><div align="right">Qt Solutions</div></td>
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<?xml version="1.0" encoding="iso-8859-1"?>
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PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<!-- qtsinglecoreapplication.cpp -->
<head>
<title>List of All Members for QtSingleCoreApplication</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
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</tr></table><h1 class="title">List of All Members for QtSingleCoreApplication</h1>
<p>This is the complete list of members for <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a>, including inherited members.</p>
<p><table class="propsummary" width="100%" border="0" cellpadding="0" cellspacing="0">
<tr><td width="45%" valign="top"><ul>
<li><div class="fn">enum <b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#Encoding-enum">Encoding</a></b></div></li>
<li><div class="fn">typedef <b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#EventFilter-typedef">EventFilter</a></b></div></li>
<li><div class="fn"><b><a href="qtsinglecoreapplication.html#QtSingleCoreApplication">QtSingleCoreApplication</a></b> ( int &amp;, char ** )</div></li>
<li><div class="fn"><b><a href="qtsinglecoreapplication.html#QtSingleCoreApplication-2">QtSingleCoreApplication</a></b> ( const QString &amp;, int &amp;, char ** )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#aboutToQuit">aboutToQuit</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#addLibraryPath">addLibraryPath</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationDirPath">applicationDirPath</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">applicationFilePath</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationName-prop">applicationName</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationPid">applicationPid</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationVersion-prop">applicationVersion</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#arguments">arguments</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#blockSignals">blockSignals</a></b> ( bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#childEvent">childEvent</a></b> ( QChildEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#children">children</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#closingDown">closingDown</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#connect">connect</a></b> ( const QObject *, const char *, const QObject *, const char *, Qt::ConnectionType )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#connect-2">connect</a></b> ( const QObject *, const char *, const char *, Qt::ConnectionType ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#connectNotify">connectNotify</a></b> ( const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#customEvent">customEvent</a></b> ( QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#d_ptr-var">d_ptr</a></b> : </div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#deleteLater">deleteLater</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#destroyed">destroyed</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnect">disconnect</a></b> ( const QObject *, const char *, const QObject *, const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnect-2">disconnect</a></b> ( const char *, const QObject *, const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnect-3">disconnect</a></b> ( const QObject *, const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#disconnectNotify">disconnectNotify</a></b> ( const char * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#dumpObjectInfo">dumpObjectInfo</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#dumpObjectTree">dumpObjectTree</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#dynamicPropertyNames">dynamicPropertyNames</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#event">event</a></b> ( QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#eventFilter">eventFilter</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#exec">exec</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#exit">exit</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#filterEvent">filterEvent</a></b> ( void *, long * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#findChild">findChild</a></b> ( const QString &amp; ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#findChildren">findChildren</a></b> ( const QString &amp; ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#findChildren-2">findChildren</a></b> ( const QRegExp &amp; ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#flush">flush</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#hasPendingEvents">hasPendingEvents</a></b> ()</div></li>
<li><div class="fn"><b><a href="qtsinglecoreapplication.html#id">id</a></b> () const : QString</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#inherits">inherits</a></b> ( const char * ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#installEventFilter">installEventFilter</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#installTranslator">installTranslator</a></b> ( QTranslator * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#instance">instance</a></b> ()</div></li>
<li><div class="fn"><b><a href="qtsinglecoreapplication.html#isRunning">isRunning</a></b> () : bool</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#isWidgetType">isWidgetType</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#killTimer">killTimer</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#libraryPaths">libraryPaths</a></b> ()</div></li>
</ul></td><td valign="top"><ul>
<li><div class="fn"><b><a href="qtsinglecoreapplication.html#messageReceived">messageReceived</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#metaObject">metaObject</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#moveToThread">moveToThread</a></b> ( QThread * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#notify">notify</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#objectName-prop">objectName</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#organizationDomain-prop">organizationDomain</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#organizationName-prop">organizationName</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#parent">parent</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#postEvent">postEvent</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#postEvent-2">postEvent</a></b> ( QObject *, QEvent *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#processEvents">processEvents</a></b> ( QFlags&lt;QEventLoop::ProcessEventsFlag&gt; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#processEvents-2">processEvents</a></b> ( QFlags&lt;QEventLoop::ProcessEventsFlag&gt;, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#property">property</a></b> ( const char * ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#quit">quit</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#receivers">receivers</a></b> ( const char * ) const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#removeEventFilter">removeEventFilter</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removeLibraryPath">removeLibraryPath</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removePostedEvents">removePostedEvents</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removePostedEvents-2">removePostedEvents</a></b> ( QObject *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#removeTranslator">removeTranslator</a></b> ( QTranslator * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#sendEvent">sendEvent</a></b> ( QObject *, QEvent * )</div></li>
<li><div class="fn"><b><a href="qtsinglecoreapplication.html#sendMessage">sendMessage</a></b> ( const QString &amp;, int ) : bool</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#sendPostedEvents">sendPostedEvents</a></b> ( QObject *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#sendPostedEvents-2">sendPostedEvents</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#sender">sender</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationName-prop">setApplicationName</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationVersion-prop">setApplicationVersion</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#setAttribute">setAttribute</a></b> ( Qt::ApplicationAttribute, bool )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#setEventFilter">setEventFilter</a></b> ( EventFilter )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#setLibraryPaths">setLibraryPaths</a></b> ( const QStringList &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#objectName-prop">setObjectName</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#organizationDomain-prop">setOrganizationDomain</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#organizationName-prop">setOrganizationName</a></b> ( const QString &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#setParent">setParent</a></b> ( QObject * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#setProperty">setProperty</a></b> ( const char *, const QVariant &amp; )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#signalsBlocked">signalsBlocked</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#startTimer">startTimer</a></b> ( int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#startingUp">startingUp</a></b> ()</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#staticMetaObject-var">staticMetaObject</a></b> : </div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#staticQtMetaObject-var">staticQtMetaObject</a></b> : </div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#testAttribute">testAttribute</a></b> ( Qt::ApplicationAttribute )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#thread">thread</a></b> () const</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#timerEvent">timerEvent</a></b> ( QTimerEvent * )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#tr">tr</a></b> ( const char *, const char *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qobject.html#trUtf8">trUtf8</a></b> ( const char *, const char *, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#translate">translate</a></b> ( const char *, const char *, const char *, Encoding, int )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#translate-2">translate</a></b> ( const char *, const char *, const char *, Encoding )</div></li>
<li><div class="fn"><b><a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#winEventFilter">winEventFilter</a></b> ( MSG *, long * )</div></li>
</ul>
</td></tr>
</table></p>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="30%" align="left">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
<td width="30%" align="right"><div align="right">Qt Solutions</div></td>
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<?xml version="1.0" encoding="iso-8859-1"?>
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PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
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<head>
<title>QtSingleCoreApplication Class Reference</title>
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</head>
<body>
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<tr>
<td align="left" valign="top" width="32"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td>
<td width="1">&nbsp;&nbsp;</td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td>
</tr></table><h1 class="title">QtSingleCoreApplication Class Reference</h1>
<p>A variant of the <a href="qtsingleapplication.html">QtSingleApplication</a> class for non-GUI applications. <a href="#details">More...</a></p>
<pre> #include &lt;QtSingleCoreApplication&gt;</pre><p>Inherits <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html">QCoreApplication</a>.</p>
<ul>
<li><a href="qtsinglecoreapplication-members.html">List of all members, including inherited members</a></li>
</ul>
<hr />
<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsinglecoreapplication.html#QtSingleCoreApplication">QtSingleCoreApplication</a></b> ( int &amp; <i>argc</i>, char ** <i>argv</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qtsinglecoreapplication.html#QtSingleCoreApplication-2">QtSingleCoreApplication</a></b> ( const QString &amp; <i>appId</i>, int &amp; <i>argc</i>, char ** <i>argv</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QString </td><td class="memItemRight" valign="bottom"><b><a href="qtsinglecoreapplication.html#id">id</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qtsinglecoreapplication.html#isRunning">isRunning</a></b> ()</td></tr>
</table>
<ul>
<li><div bar="2" class="fn"></div>4 public functions inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#public-functions">QCoreApplication</a></li>
<li><div bar="2" class="fn"></div>29 public functions inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#public-functions">QObject</a></li>
</ul>
<hr />
<a name="public-slots"></a>
<h2>Public Slots</h2>
<table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qtsinglecoreapplication.html#sendMessage">sendMessage</a></b> ( const QString &amp; <i>message</i>, int <i>timeout</i> = 5000 )</td></tr>
</table>
<ul>
<li><div bar="2" class="fn"></div>1 public slot inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#public-slots">QCoreApplication</a></li>
<li><div bar="2" class="fn"></div>1 public slot inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#public-slots">QObject</a></li>
</ul>
<hr />
<a name="signals"></a>
<h2>Signals</h2>
<table class="alignedsummary" border="0" cellpadding="0" cellspacing="0" width="100%">
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qtsinglecoreapplication.html#messageReceived">messageReceived</a></b> ( const QString &amp; <i>message</i> )</td></tr>
</table>
<ul>
<li><div bar="2" class="fn"></div>1 signal inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#signals">QCoreApplication</a></li>
<li><div bar="2" class="fn"></div>1 signal inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#signals">QObject</a></li>
</ul>
<h3>Additional Inherited Members</h3>
<ul>
<li><div class="fn"></div>4 properties inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#properties">QCoreApplication</a></li>
<li><div class="fn"></div>1 property inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#properties">QObject</a></li>
<li><div class="fn"></div>1 public type inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#public-variables">QObject</a></li>
<li><div class="fn"></div>38 static public members inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#static-public-members">QCoreApplication</a></li>
<li><div class="fn"></div>4 static public members inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#static-public-members">QObject</a></li>
<li><div class="fn"></div>1 protected function inherited from <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#protected-functions">QCoreApplication</a></li>
<li><div class="fn"></div>7 protected functions inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#protected-functions">QObject</a></li>
<li><div class="fn"></div>2 protected variables inherited from <a href="http://qt.nokia.com/doc/4.6/qobject.html#protected-variables">QObject</a></li>
</ul>
<a name="details"></a>
<hr />
<h2>Detailed Description</h2>
<p>A variant of the <a href="qtsingleapplication.html">QtSingleApplication</a> class for non-GUI applications.</p>
<p>This class is a variant of <a href="qtsingleapplication.html">QtSingleApplication</a> suited for use in console (non-GUI) applications. It is an extension of <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html">QCoreApplication</a> (instead of <a href="http://qt.nokia.com/doc/4.6/qapplication.html">QApplication</a>). It does not require the <a href="http://qt.nokia.com/doc/4.6/qtgui.html">QtGui</a> library.</p>
<p>The API and usage is identical to <a href="qtsingleapplication.html">QtSingleApplication</a>, except that functions relating to the &quot;activation window&quot; are not present, for obvious reasons. Please refer to the <a href="qtsingleapplication.html">QtSingleApplication</a> documentation for explanation of the usage.</p>
<p>A QtSingleCoreApplication instance can communicate to a <a href="qtsingleapplication.html">QtSingleApplication</a> instance if they share the same application id. Hence, this class can be used to create a light-weight command-line tool that sends commands to a GUI application.</p>
<p>See also <a href="qtsingleapplication.html">QtSingleApplication</a>.</p>
<hr />
<h2>Member Function Documentation</h2>
<h3 class="fn"><a name="QtSingleCoreApplication"></a>QtSingleCoreApplication::QtSingleCoreApplication ( int &amp; <i>argc</i>, char ** <i>argv</i> )</h3>
<p>Creates a <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a> object. The application identifier will be <a href="http://qt.nokia.com/doc/4.6/qcoreapplication.html#applicationFilePath">QCoreApplication::applicationFilePath</a>(). <i>argc</i> and <i>argv</i> are passed on to the QCoreAppliation constructor.</p>
<h3 class="fn"><a name="QtSingleCoreApplication-2"></a>QtSingleCoreApplication::QtSingleCoreApplication ( const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>appId</i>, int &amp; <i>argc</i>, char ** <i>argv</i> )</h3>
<p>Creates a <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a> object with the application identifier <i>appId</i>. <i>argc</i> and <i>argv</i> are passed on to the QCoreAppliation constructor.</p>
<h3 class="fn"><a name="id"></a><a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> QtSingleCoreApplication::id () const</h3>
<p>Returns the application identifier. Two processes with the same identifier will be regarded as instances of the same application.</p>
<h3 class="fn"><a name="isRunning"></a>bool QtSingleCoreApplication::isRunning ()</h3>
<p>Returns true if another instance of this application is running; otherwise false.</p>
<p>This function does not find instances of this application that are being run by a different user (on Windows: that are running in another session).</p>
<p>See also <a href="qtsinglecoreapplication.html#sendMessage">sendMessage</a>().</p>
<h3 class="fn"><a name="messageReceived"></a>void QtSingleCoreApplication::messageReceived ( const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>message</i> )&nbsp;&nbsp;<tt> [signal]</tt></h3>
<p>This signal is emitted when the current instance receives a <i>message</i> from another instance of this application.</p>
<p>See also <a href="qtsinglecoreapplication.html#sendMessage">sendMessage</a>().</p>
<h3 class="fn"><a name="sendMessage"></a>bool QtSingleCoreApplication::sendMessage ( const <a href="http://qt.nokia.com/doc/4.6/qstring.html">QString</a> &amp; <i>message</i>, int <i>timeout</i> = 5000 )&nbsp;&nbsp;<tt> [slot]</tt></h3>
<p>Tries to send the text <i>message</i> to the currently running instance. The <a href="qtsinglecoreapplication.html">QtSingleCoreApplication</a> object in the running instance will emit the <a href="qtsinglecoreapplication.html#messageReceived">messageReceived</a>() signal when it receives the message.</p>
<p>This function returns true if the message has been sent to, and processed by, the current instance. If there is no instance currently running, or if the running instance fails to process the message within <i>timeout</i> milliseconds, this function return false.</p>
<p>See also <a href="qtsinglecoreapplication.html#isRunning">isRunning</a>() and <a href="qtsinglecoreapplication.html#messageReceived">messageReceived</a>().</p>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="30%" align="left">Copyright &copy; 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td>
<td width="30%" align="right"><div align="right">Qt Solutions</div></td>
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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*!
\page index.html
\title Single Application
\section1 Description
The QtSingleApplication component provides support
for applications that can be only started once per user.
For some applications it is useful or even critical that they are started
only once by any user. Future attempts to start the application should
activate any already running instance, and possibly perform requested
actions, e.g. loading a file, in that instance.
The QtSingleApplication class provides an interface to detect a running
instance, and to send command strings to that instance.
For console (non-GUI) applications, the QtSingleCoreApplication variant is provided, which avoids dependency on QtGui.
\section1 Classes
\list
\i QtSingleApplication \i QtSingleCoreApplication\endlist
\section1 Examples
\list
\i \link qtsingleapplication-example-trivial.html A Trivial Example \endlink \i \link qtsingleapplication-example-loader.html Loading Documents \endlink \i \link qtsinglecoreapplication-example-console.html A Non-GUI Example \endlink \endlist
\section1 Tested platforms
\list
\i Qt 4.4, 4.5 / Windows XP / MSVC.NET 2005
\i Qt 4.4, 4.5 / Linux / gcc
\i Qt 4.4, 4.5 / MacOS X 10.5 / gcc
\endlist
*/

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TEMPLATE = app
CONFIG += console
SOURCES += main.cpp
include(../../src/qtsinglecoreapplication.pri)
QT -= gui

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*! \page qtsinglecoreapplication-example-console.html
\title A non-GUI example
This example shows how to use the single-application functionality
in a console application. It does not require the \c QtGui library
at all.
The only differences from the GUI application usage demonstrated
in the other examples are:
1) The \c.pro file should include \c qtsinglecoreapplication.pri
instead of \c qtsingleapplication.pri
2) The class name is \c QtSingleCoreApplication instead of \c
QtSingleApplication.
3) No calls are made regarding window activation, for obvious reasons.
console.pro:
\quotefile console/console.pro
main.cpp:
\quotefile console/main.cpp
*/

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtsinglecoreapplication.h"
#include <QDebug>
void report(const QString& msg)
{
qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg));
}
class MainClass : public QObject
{
Q_OBJECT
public:
MainClass()
: QObject()
{}
public slots:
void handleMessage(const QString& message)
{
report( "Message received: \"" + message + "\"");
}
};
int main(int argc, char **argv)
{
report("Starting up");
QtSingleCoreApplication app(argc, argv);
if (app.isRunning()) {
QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid()));
bool sentok = app.sendMessage(msg, 2000);
QString rep("Another instance is running, so I will exit.");
rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen.";
report(rep);
return 0;
} else {
report("No other instance is running; so I will.");
MainClass mainObj;
QObject::connect(&app, SIGNAL(messageReceived(const QString&)),
&mainObj, SLOT(handleMessage(const QString&)));
return app.exec();
}
}
#include "main.moc"

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TEMPLATE = subdirs
SUBDIRS = trivial \
loader \
console

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greaterThan(QT_MAJOR_VERSION, 4): QT += printsupport
TEMPLATE = app
include(../../src/qtsingleapplication.pri)
SOURCES += main.cpp

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*! \page qtsingleapplication-example-loader.html
\title Loading Documents
The application in this example loads or prints the documents
passed as commandline parameters to further instances of this
application.
\quotefromfile loader/main.cpp
\printuntil };
The user interface in this application is a QMainWindow subclass
with a QMdiArea as the central widget. It implements a slot
\c handleMessage() that will be connected to the messageReceived()
signal of the QtSingleApplication class.
\printuntil }
The MainWindow constructor creates a minimal user interface.
\printto case Print:
The handleMessage() slot interprets the message passed in as a
filename that can be prepended with \e /print to indicate that
the file should just be printed rather than loaded.
\printto #include
Loading the file will also activate the window.
\printto mw
The \c main entry point function creates a QtSingleApplication
object, and creates a message to send to a running instance
of the application. If the message was sent successfully the
process exits immediately.
\printuntil }
If the message could not be sent the application starts up. Note
that \c false is passed to the call to setActivationWindow() to
prevent automatic activation for every message received, e.g. when
the application should just print a file. Instead, the message
handling function determines whether activation is requested, and
signals that by emitting the needToShow() signal. This is then
simply connected directly to QtSingleApplication's
activateWindow() slot.
*/

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include <qtsingleapplication.h>
#include <QFile>
#include <QMainWindow>
#include <QPrinter>
#include <QPainter>
#include <QTextEdit>
#include <QMdiArea>
#include <QTextStream>
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow();
public slots:
void handleMessage(const QString& message);
signals:
void needToShow();
private:
QMdiArea *workspace;
};
MainWindow::MainWindow()
{
workspace = new QMdiArea(this);
setCentralWidget(workspace);
}
void MainWindow::handleMessage(const QString& message)
{
enum Action {
Nothing,
Open,
Print
} action;
action = Nothing;
QString filename = message;
if (message.toLower().startsWith("/print ")) {
filename = filename.mid(7);
action = Print;
} else if (!message.isEmpty()) {
action = Open;
}
if (action == Nothing) {
emit needToShow();
return;
}
QFile file(filename);
QString contents;
if (file.open(QIODevice::ReadOnly))
contents = file.readAll();
else
contents = "[[Error: Could not load file " + filename + "]]";
QTextEdit *view = new QTextEdit;
view->setPlainText(contents);
switch(action) {
case Print:
{
QPrinter printer;
view->print(&printer);
delete view;
}
break;
case Open:
{
workspace->addSubWindow(view);
view->setWindowTitle(message);
view->show();
emit needToShow();
}
break;
default:
break;
};
}
#include "main.moc"
int main(int argc, char **argv)
{
QtSingleApplication instance("File loader QtSingleApplication example", argc, argv);
QString message;
for (int a = 1; a < argc; ++a) {
message += argv[a];
if (a < argc-1)
message += " ";
}
if (instance.sendMessage(message))
return 0;
MainWindow mw;
mw.handleMessage(message);
mw.show();
QObject::connect(&instance, SIGNAL(messageReceived(const QString&)),
&mw, SLOT(handleMessage(const QString&)));
instance.setActivationWindow(&mw, false);
QObject::connect(&mw, SIGNAL(needToShow()), &instance, SLOT(activateWindow()));
return instance.exec();
}

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include <qtsingleapplication.h>
#include <QTextEdit>
class TextEdit : public QTextEdit
{
Q_OBJECT
public:
TextEdit(QWidget *parent = 0)
: QTextEdit(parent)
{}
public slots:
void append(const QString &str)
{
QTextEdit::append(str);
}
};
#include "main.moc"
int main(int argc, char **argv)
{
QtSingleApplication instance(argc, argv);
if (instance.sendMessage("Wake up!"))
return 0;
TextEdit logview;
logview.setReadOnly(true);
logview.show();
instance.setActivationWindow(&logview);
QObject::connect(&instance, SIGNAL(messageReceived(const QString&)),
&logview, SLOT(append(const QString&)));
return instance.exec();
}

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TEMPLATE = app
include(../../src/qtsingleapplication.pri)
SOURCES += main.cpp

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*! \page qtsingleapplication-example-trivial.html
\title A Trivial Example
The application in this example has a log-view that displays
messages sent by further instances of the same application.
The example demonstrates the use of the QtSingleApplication
class to detect and communicate with a running instance of
the application using the sendMessage() API. The messageReceived()
signal is used to display received messages in a QTextEdit log.
\quotefromfile trivial/main.cpp
\printuntil instance
The example has only the \c main entry point function.
A QtSingleApplication object is created immediately.
\printuntil return
If another instance of this application is already running,
sendMessage() will succeed, and this instance just exits
immediately.
\printuntil show()
Otherwise the instance continues as normal and creates the
user interface.
\printuntil return instance.exec();
The \c logview object is also set as the application's activation
window. Every time a message is received, the window will be raised
and activated automatically.
The messageReceived() signal is also connected to the QTextEdit's
append() slot. Every message received from further instances of
this application will be displayed in the log.
Finally the event loop is entered.
*/

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtlocalpeer.h"
#include <QCoreApplication>
#include <QDataStream>
#include <QTime>
#if defined(Q_OS_WIN)
#include <QLibrary>
#include <qt_windows.h>
typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
static PProcessIdToSessionId pProcessIdToSessionId = 0;
#endif
#if defined(Q_OS_UNIX)
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#endif
namespace QtLP_Private {
#include "qtlockedfile.cpp"
#if defined(Q_OS_WIN)
#include "qtlockedfile_win.cpp"
#else
#include "qtlockedfile_unix.cpp"
#endif
}
const char* QtLocalPeer::ack = "ack";
QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
: QObject(parent), id(appId)
{
QString prefix = id;
if (id.isEmpty()) {
id = QCoreApplication::applicationFilePath();
#if defined(Q_OS_WIN)
id = id.toLower();
#endif
prefix = id.section(QLatin1Char('/'), -1);
}
prefix.remove(QRegExp("[^a-zA-Z]"));
prefix.truncate(6);
QByteArray idc = id.toUtf8();
quint16 idNum = qChecksum(idc.constData(), idc.size());
socketName = QLatin1String("qtsingleapp-") + prefix
+ QLatin1Char('-') + QString::number(idNum, 16);
#if defined(Q_OS_WIN)
if (!pProcessIdToSessionId) {
QLibrary lib("kernel32");
pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
}
if (pProcessIdToSessionId) {
DWORD sessionId = 0;
pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
socketName += QLatin1Char('-') + QString::number(sessionId, 16);
}
#else
socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
#endif
server = new QLocalServer(this);
QString lockName = QDir(QDir::tempPath()).absolutePath()
+ QLatin1Char('/') + socketName
+ QLatin1String("-lockfile");
lockFile.setFileName(lockName);
lockFile.open(QIODevice::ReadWrite);
}
bool QtLocalPeer::isClient()
{
if (lockFile.isLocked())
return false;
if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
return true;
bool res = server->listen(socketName);
#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
// ### Workaround
if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
res = server->listen(socketName);
}
#endif
if (!res)
qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
return false;
}
bool QtLocalPeer::sendMessage(const QString &message, int timeout)
{
if (!isClient())
return false;
QLocalSocket socket;
bool connOk = false;
for(int i = 0; i < 2; i++) {
// Try twice, in case the other instance is just starting up
socket.connectToServer(socketName);
connOk = socket.waitForConnected(timeout/2);
if (connOk || i)
break;
int ms = 250;
#if defined(Q_OS_WIN)
Sleep(DWORD(ms));
#else
struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
nanosleep(&ts, NULL);
#endif
}
if (!connOk)
return false;
QByteArray uMsg(message.toUtf8());
QDataStream ds(&socket);
ds.writeBytes(uMsg.constData(), uMsg.size());
bool res = socket.waitForBytesWritten(timeout);
if (res) {
res &= socket.waitForReadyRead(timeout); // wait for ack
if (res)
res &= (socket.read(qstrlen(ack)) == ack);
}
return res;
}
void QtLocalPeer::receiveConnection()
{
QLocalSocket* socket = server->nextPendingConnection();
if (!socket)
return;
while (true) {
if (socket->state() == QLocalSocket::UnconnectedState) {
qWarning("QtLocalPeer: Peer disconnected");
delete socket;
socket = nullptr;
return;
}
if (socket->bytesAvailable() >= qint64(sizeof(quint32)))
break;
socket->waitForReadyRead();
}
QDataStream ds(socket);
QByteArray uMsg;
quint32 remaining;
ds >> remaining;
uMsg.resize(remaining);
int got = 0;
char* uMsgBuf = uMsg.data();
do {
got = ds.readRawData(uMsgBuf, remaining);
remaining -= got;
uMsgBuf += got;
} while (remaining && got >= 0 && socket->waitForReadyRead(2000));
if (got < 0) {
qWarning("QtLocalPeer: Message reception failed %s", socket->errorString().toLatin1().constData());
delete socket;
socket = nullptr;
return;
}
QString message(QString::fromUtf8(uMsg));
socket->write(ack, qstrlen(ack));
socket->waitForBytesWritten(1000);
socket->waitForDisconnected(1000); // make sure client reads ack
delete socket;
socket = nullptr;
Q_EMIT messageReceived(message); //### (might take a long time to return)
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTLOCALPEER_H
#define QTLOCALPEER_H
#include <QLocalServer>
#include <QLocalSocket>
#include <QDir>
#include "qtlockedfile.h"
class QtLocalPeer : public QObject
{
Q_OBJECT
public:
QtLocalPeer(QObject *parent = 0, const QString &appId = QString());
bool isClient();
bool sendMessage(const QString &message, int timeout);
QString applicationId() const
{ return id; }
Q_SIGNALS:
void messageReceived(const QString &message);
protected Q_SLOTS:
void receiveConnection();
protected:
QString id;
QString socketName;
QLocalServer* server;
QtLP_Private::QtLockedFile lockFile;
private:
static const char* ack;
};
#endif // QTLOCALPEER_H

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtlockedfile.h"
/*!
\class QtLockedFile
\brief The QtLockedFile class extends QFile with advisory locking
functions.
A file may be locked in read or write mode. Multiple instances of
\e QtLockedFile, created in multiple processes running on the same
machine, may have a file locked in read mode. Exactly one instance
may have it locked in write mode. A read and a write lock cannot
exist simultaneously on the same file.
The file locks are advisory. This means that nothing prevents
another process from manipulating a locked file using QFile or
file system functions offered by the OS. Serialization is only
guaranteed if all processes that access the file use
QLockedFile. Also, while holding a lock on a file, a process
must not open the same file again (through any API), or locks
can be unexpectedly lost.
The lock provided by an instance of \e QtLockedFile is released
whenever the program terminates. This is true even when the
program crashes and no destructors are called.
*/
/*! \enum QtLockedFile::LockMode
This enum describes the available lock modes.
\value ReadLock A read lock.
\value WriteLock A write lock.
\value NoLock Neither a read lock nor a write lock.
*/
/*!
Constructs an unlocked \e QtLockedFile object. This constructor
behaves in the same way as \e QFile::QFile().
\sa QFile::QFile()
*/
QtLockedFile::QtLockedFile()
: QFile()
{
#ifdef Q_OS_WIN
wmutex = 0;
rmutex = 0;
#endif
m_lock_mode = NoLock;
}
/*!
Constructs an unlocked QtLockedFile object with file \a name. This
constructor behaves in the same way as \e QFile::QFile(const
QString&).
\sa QFile::QFile()
*/
QtLockedFile::QtLockedFile(const QString &name)
: QFile(name)
{
#ifdef Q_OS_WIN
wmutex = 0;
rmutex = 0;
#endif
m_lock_mode = NoLock;
}
/*!
Opens the file in OpenMode \a mode.
This is identical to QFile::open(), with the one exception that the
Truncate mode flag is disallowed. Truncation would conflict with the
advisory file locking, since the file would be modified before the
write lock is obtained. If truncation is required, use resize(0)
after obtaining the write lock.
Returns true if successful; otherwise false.
\sa QFile::open(), QFile::resize()
*/
bool QtLockedFile::open(OpenMode mode)
{
if (mode & QIODevice::Truncate) {
qWarning("QtLockedFile::open(): Truncate mode not allowed.");
return false;
}
return QFile::open(mode);
}
/*!
Returns \e true if this object has a in read or write lock;
otherwise returns \e false.
\sa lockMode()
*/
bool QtLockedFile::isLocked() const
{
return m_lock_mode != NoLock;
}
/*!
Returns the type of lock currently held by this object, or \e
QtLockedFile::NoLock.
\sa isLocked()
*/
QtLockedFile::LockMode QtLockedFile::lockMode() const
{
return m_lock_mode;
}
/*!
\fn bool QtLockedFile::lock(LockMode mode, bool block = true)
Obtains a lock of type \a mode. The file must be opened before it
can be locked.
If \a block is true, this function will block until the lock is
aquired. If \a block is false, this function returns \e false
immediately if the lock cannot be aquired.
If this object already has a lock of type \a mode, this function
returns \e true immediately. If this object has a lock of a
different type than \a mode, the lock is first released and then a
new lock is obtained.
This function returns \e true if, after it executes, the file is
locked by this object, and \e false otherwise.
\sa unlock(), isLocked(), lockMode()
*/
/*!
\fn bool QtLockedFile::unlock()
Releases a lock.
If the object has no lock, this function returns immediately.
This function returns \e true if, after it executes, the file is
not locked by this object, and \e false otherwise.
\sa lock(), isLocked(), lockMode()
*/
/*!
\fn QtLockedFile::~QtLockedFile()
Destroys the \e QtLockedFile object. If any locks were held, they
are released.
*/

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTLOCKEDFILE_H
#define QTLOCKEDFILE_H
#include <QFile>
#ifdef Q_OS_WIN
#include <QVector>
#endif
#if defined(Q_OS_WIN)
# if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
# define QT_QTLOCKEDFILE_EXPORT
# elif defined(QT_QTLOCKEDFILE_IMPORT)
# if defined(QT_QTLOCKEDFILE_EXPORT)
# undef QT_QTLOCKEDFILE_EXPORT
# endif
# define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
# elif defined(QT_QTLOCKEDFILE_EXPORT)
# undef QT_QTLOCKEDFILE_EXPORT
# define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
# endif
#else
# define QT_QTLOCKEDFILE_EXPORT
#endif
namespace QtLP_Private {
class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
{
public:
enum LockMode { NoLock = 0, ReadLock, WriteLock };
QtLockedFile();
QtLockedFile(const QString &name);
~QtLockedFile();
bool open(OpenMode mode);
bool lock(LockMode mode, bool block = true);
bool unlock();
bool isLocked() const;
LockMode lockMode() const;
private:
#ifdef Q_OS_WIN
Qt::HANDLE wmutex;
Qt::HANDLE rmutex;
QVector<Qt::HANDLE> rmutexes;
QString mutexname;
Qt::HANDLE getMutexHandle(int idx, bool doCreate);
bool waitMutex(Qt::HANDLE mutex, bool doBlock);
#endif
LockMode m_lock_mode;
};
}
#endif

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "qtlockedfile.h"
bool QtLockedFile::lock(LockMode mode, bool block)
{
if (!isOpen()) {
qWarning("QtLockedFile::lock(): file is not opened");
return false;
}
if (mode == NoLock)
return unlock();
if (mode == m_lock_mode)
return true;
if (m_lock_mode != NoLock)
unlock();
struct flock fl;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = (mode == ReadLock) ? F_RDLCK : F_WRLCK;
int cmd = block ? F_SETLKW : F_SETLK;
int ret = fcntl(handle(), cmd, &fl);
if (ret == -1) {
if (errno != EINTR && errno != EAGAIN)
qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
return false;
}
m_lock_mode = mode;
return true;
}
bool QtLockedFile::unlock()
{
if (!isOpen()) {
qWarning("QtLockedFile::unlock(): file is not opened");
return false;
}
if (!isLocked())
return true;
struct flock fl;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = F_UNLCK;
int ret = fcntl(handle(), F_SETLKW, &fl);
if (ret == -1) {
qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
return false;
}
m_lock_mode = NoLock;
return true;
}
QtLockedFile::~QtLockedFile()
{
if (isOpen())
unlock();
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtlockedfile.h"
#include <qt_windows.h>
#include <QFileInfo>
#define MUTEX_PREFIX "QtLockedFile mutex "
// Maximum number of concurrent read locks. Must not be greater than MAXIMUM_WAIT_OBJECTS
#define MAX_READERS MAXIMUM_WAIT_OBJECTS
#if QT_VERSION >= 0x050000
#define QT_WA(unicode, ansi) unicode
#endif
Qt::HANDLE QtLockedFile::getMutexHandle(int idx, bool doCreate)
{
if (mutexname.isEmpty()) {
QFileInfo fi(*this);
mutexname = QString::fromLatin1(MUTEX_PREFIX)
+ fi.absoluteFilePath().toLower();
}
QString mname(mutexname);
if (idx >= 0)
mname += QString::number(idx);
Qt::HANDLE mutex;
if (doCreate) {
QT_WA( { mutex = CreateMutexW(NULL, FALSE, (TCHAR*)mname.utf16()); },
{ mutex = CreateMutexA(NULL, FALSE, mname.toLocal8Bit().constData()); } );
if (!mutex) {
qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
return 0;
}
}
else {
QT_WA( { mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (TCHAR*)mname.utf16()); },
{ mutex = OpenMutexA(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, mname.toLocal8Bit().constData()); } );
if (!mutex) {
if (GetLastError() != ERROR_FILE_NOT_FOUND)
qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
return 0;
}
}
return mutex;
}
bool QtLockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock)
{
Q_ASSERT(mutex);
DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
switch (res) {
case WAIT_OBJECT_0:
case WAIT_ABANDONED:
return true;
break;
case WAIT_TIMEOUT:
break;
default:
qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
}
return false;
}
bool QtLockedFile::lock(LockMode mode, bool block)
{
if (!isOpen()) {
qWarning("QtLockedFile::lock(): file is not opened");
return false;
}
if (mode == NoLock)
return unlock();
if (mode == m_lock_mode)
return true;
if (m_lock_mode != NoLock)
unlock();
if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
return false;
if (!waitMutex(wmutex, block))
return false;
if (mode == ReadLock) {
int idx = 0;
for (; idx < MAX_READERS; idx++) {
rmutex = getMutexHandle(idx, false);
if (!rmutex || waitMutex(rmutex, false))
break;
CloseHandle(rmutex);
}
bool ok = true;
if (idx >= MAX_READERS) {
qWarning("QtLockedFile::lock(): too many readers");
rmutex = 0;
ok = false;
}
else if (!rmutex) {
rmutex = getMutexHandle(idx, true);
if (!rmutex || !waitMutex(rmutex, false))
ok = false;
}
if (!ok && rmutex) {
CloseHandle(rmutex);
rmutex = 0;
}
ReleaseMutex(wmutex);
if (!ok)
return false;
}
else {
Q_ASSERT(rmutexes.isEmpty());
for (int i = 0; i < MAX_READERS; i++) {
Qt::HANDLE mutex = getMutexHandle(i, false);
if (mutex)
rmutexes.append(mutex);
}
if (rmutexes.size()) {
DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
TRUE, block ? INFINITE : 0);
if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
if (res != WAIT_TIMEOUT)
qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky
unlock();
return false;
}
}
}
m_lock_mode = mode;
return true;
}
bool QtLockedFile::unlock()
{
if (!isOpen()) {
qWarning("QtLockedFile::unlock(): file is not opened");
return false;
}
if (!isLocked())
return true;
if (m_lock_mode == ReadLock) {
ReleaseMutex(rmutex);
CloseHandle(rmutex);
rmutex = 0;
}
else {
foreach(Qt::HANDLE mutex, rmutexes) {
ReleaseMutex(mutex);
CloseHandle(mutex);
}
rmutexes.clear();
ReleaseMutex(wmutex);
}
m_lock_mode = QtLockedFile::NoLock;
return true;
}
QtLockedFile::~QtLockedFile()
{
if (isOpen())
unlock();
if (wmutex)
CloseHandle(wmutex);
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtsingleapplication.h"
#include "qtlocalpeer.h"
#include <QWidget>
/*!
\class QtSingleApplication qtsingleapplication.h
\brief The QtSingleApplication class provides an API to detect and
communicate with running instances of an application.
This class allows you to create applications where only one
instance should be running at a time. I.e., if the user tries to
launch another instance, the already running instance will be
activated instead. Another usecase is a client-server system,
where the first started instance will assume the role of server,
and the later instances will act as clients of that server.
By default, the full path of the executable file is used to
determine whether two processes are instances of the same
application. You can also provide an explicit identifier string
that will be compared instead.
The application should create the QtSingleApplication object early
in the startup phase, and call isRunning() to find out if another
instance of this application is already running. If isRunning()
returns false, it means that no other instance is running, and
this instance has assumed the role as the running instance. In
this case, the application should continue with the initialization
of the application user interface before entering the event loop
with exec(), as normal.
The messageReceived() signal will be emitted when the running
application receives messages from another instance of the same
application. When a message is received it might be helpful to the
user to raise the application so that it becomes visible. To
facilitate this, QtSingleApplication provides the
setActivationWindow() function and the activateWindow() slot.
If isRunning() returns true, another instance is already
running. It may be alerted to the fact that another instance has
started by using the sendMessage() function. Also data such as
startup parameters (e.g. the name of the file the user wanted this
new instance to open) can be passed to the running instance with
this function. Then, the application should terminate (or enter
client mode).
If isRunning() returns true, but sendMessage() fails, that is an
indication that the running instance is frozen.
Here's an example that shows how to convert an existing
application to use QtSingleApplication. It is very simple and does
not make use of all QtSingleApplication's functionality (see the
examples for that).
\code
// Original
int main(int argc, char **argv)
{
QApplication app(argc, argv);
MyMainWidget mmw;
mmw.show();
return app.exec();
}
// Single instance
int main(int argc, char **argv)
{
QtSingleApplication app(argc, argv);
if (app.isRunning())
return !app.sendMessage(someDataString);
MyMainWidget mmw;
app.setActivationWindow(&mmw);
mmw.show();
return app.exec();
}
\endcode
Once this QtSingleApplication instance is destroyed (normally when
the process exits or crashes), when the user next attempts to run the
application this instance will not, of course, be encountered. The
next instance to call isRunning() or sendMessage() will assume the
role as the new running instance.
For console (non-GUI) applications, QtSingleCoreApplication may be
used instead of this class, to avoid the dependency on the QtGui
library.
\sa QtSingleCoreApplication
*/
void QtSingleApplication::sysInit(const QString &appId)
{
actWin = 0;
peer = new QtLocalPeer(this, appId);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Creates a QtSingleApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc, \a
argv, and \a GUIenabled are passed on to the QAppliation constructor.
If you are creating a console application (i.e. setting \a
GUIenabled to false), you may consider using
QtSingleCoreApplication instead.
*/
QtSingleApplication::QtSingleApplication(int &argc, char **argv, bool GUIenabled)
: QApplication(argc, argv, GUIenabled)
{
sysInit();
}
/*!
Creates a QtSingleApplication object with the application
identifier \a appId. \a argc and \a argv are passed on to the
QAppliation constructor.
*/
QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char **argv)
: QApplication(argc, argv)
{
sysInit(appId);
}
#if QT_VERSION < 0x050000
/*!
Creates a QtSingleApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc, \a
argv, and \a type are passed on to the QAppliation constructor.
*/
QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
: QApplication(argc, argv, type)
{
sysInit();
}
# if defined(Q_WS_X11)
/*!
Special constructor for X11, ref. the documentation of
QApplication's corresponding constructor. The application identifier
will be QCoreApplication::applicationFilePath(). \a dpy, \a visual,
and \a cmap are passed on to the QApplication constructor.
*/
QtSingleApplication::QtSingleApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE cmap)
: QApplication(dpy, visual, cmap)
{
sysInit();
}
/*!
Special constructor for X11, ref. the documentation of
QApplication's corresponding constructor. The application identifier
will be QCoreApplication::applicationFilePath(). \a dpy, \a argc, \a
argv, \a visual, and \a cmap are passed on to the QApplication
constructor.
*/
QtSingleApplication::QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
: QApplication(dpy, argc, argv, visual, cmap)
{
sysInit();
}
/*!
Special constructor for X11, ref. the documentation of
QApplication's corresponding constructor. The application identifier
will be \a appId. \a dpy, \a argc, \a
argv, \a visual, and \a cmap are passed on to the QApplication
constructor.
*/
QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
: QApplication(dpy, argc, argv, visual, cmap)
{
sysInit(appId);
}
# endif // Q_WS_X11
#endif // QT_VERSION < 0x050000
/*!
Returns true if another instance of this application is running;
otherwise false.
This function does not find instances of this application that are
being run by a different user (on Windows: that are running in
another session).
\sa sendMessage()
*/
bool QtSingleApplication::isRunning()
{
return peer->isClient();
}
/*!
Tries to send the text \a message to the currently running
instance. The QtSingleApplication object in the running instance
will emit the messageReceived() signal when it receives the
message.
This function returns true if the message has been sent to, and
processed by, the current instance. If there is no instance
currently running, or if the running instance fails to process the
message within \a timeout milliseconds, this function return false.
\sa isRunning(), messageReceived()
*/
bool QtSingleApplication::sendMessage(const QString &message, int timeout)
{
return peer->sendMessage(message, timeout);
}
/*!
Returns the application identifier. Two processes with the same
identifier will be regarded as instances of the same application.
*/
QString QtSingleApplication::id() const
{
return peer->applicationId();
}
/*!
Sets the activation window of this application to \a aw. The
activation window is the widget that will be activated by
activateWindow(). This is typically the application's main window.
If \a activateOnMessage is true (the default), the window will be
activated automatically every time a message is received, just prior
to the messageReceived() signal being emitted.
\sa activateWindow(), messageReceived()
*/
void QtSingleApplication::setActivationWindow(QWidget* aw, bool activateOnMessage)
{
actWin = aw;
if (activateOnMessage)
connect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
else
disconnect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
}
/*!
Returns the applications activation window if one has been set by
calling setActivationWindow(), otherwise returns 0.
\sa setActivationWindow()
*/
QWidget* QtSingleApplication::activationWindow() const
{
return actWin;
}
/*!
De-minimizes, raises, and activates this application's activation window.
This function does nothing if no activation window has been set.
This is a convenience function to show the user that this
application instance has been activated when he has tried to start
another instance.
This function should typically be called in response to the
messageReceived() signal. By default, that will happen
automatically, if an activation window has been set.
\sa setActivationWindow(), messageReceived(), initialize()
*/
void QtSingleApplication::activateWindow()
{
if (actWin) {
//actWin->setWindowState(actWin->windowState() & ~Qt::WindowMinimized);
actWin->raise();
actWin->activateWindow();
}
}
/*!
\fn void QtSingleApplication::messageReceived(const QString& message)
This signal is emitted when the current instance receives a \a
message from another instance of this application.
\sa sendMessage(), setActivationWindow(), activateWindow()
*/
/*!
\fn void QtSingleApplication::initialize(bool dummy = true)
\obsolete
*/

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTSINGLEAPPLICATION_H
#define QTSINGLEAPPLICATION_H
#include <QApplication>
class QtLocalPeer;
#if defined(Q_OS_WIN)
# if !defined(QT_QTSINGLEAPPLICATION_EXPORT) && !defined(QT_QTSINGLEAPPLICATION_IMPORT)
# define QT_QTSINGLEAPPLICATION_EXPORT
# elif defined(QT_QTSINGLEAPPLICATION_IMPORT)
# if defined(QT_QTSINGLEAPPLICATION_EXPORT)
# undef QT_QTSINGLEAPPLICATION_EXPORT
# endif
# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllimport)
# elif defined(QT_QTSINGLEAPPLICATION_EXPORT)
# undef QT_QTSINGLEAPPLICATION_EXPORT
# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllexport)
# endif
#else
# define QT_QTSINGLEAPPLICATION_EXPORT
#endif
class QT_QTSINGLEAPPLICATION_EXPORT QtSingleApplication : public QApplication
{
Q_OBJECT
public:
QtSingleApplication(int &argc, char **argv, bool GUIenabled = true);
QtSingleApplication(const QString &id, int &argc, char **argv);
#if QT_VERSION < 0x050000
QtSingleApplication(int &argc, char **argv, Type type);
# if defined(Q_WS_X11)
QtSingleApplication(Display* dpy, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap= 0);
QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
# endif // Q_WS_X11
#endif // QT_VERSION < 0x050000
bool isRunning();
QString id() const;
void setActivationWindow(QWidget* aw, bool activateOnMessage = true);
QWidget* activationWindow() const;
// Obsolete:
void initialize(bool dummy = true)
{ isRunning(); Q_UNUSED(dummy) }
public Q_SLOTS:
bool sendMessage(const QString &message, int timeout = 5000);
void activateWindow();
Q_SIGNALS:
void messageReceived(const QString &message);
private:
void sysInit(const QString &appId = QString());
QtLocalPeer *peer;
QWidget *actWin;
};
#endif // QTSINGLEAPPLICATION_H

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INCLUDEPATH += $$PWD
DEPENDPATH += $$PWD
QT *= network
greaterThan(QT_MAJOR_VERSION, 4): QT *= widgets
qtsingleapplication-uselib:!qtsingleapplication-buildlib {
LIBS += -L$$QTSINGLEAPPLICATION_LIBDIR -l$$QTSINGLEAPPLICATION_LIBNAME
} else {
SOURCES += $$PWD/qtsingleapplication.cpp $$PWD/qtlocalpeer.cpp
HEADERS += $$PWD/qtsingleapplication.h $$PWD/qtlocalpeer.h
}
win32 {
contains(TEMPLATE, lib):contains(CONFIG, shared):DEFINES += QT_QTSINGLEAPPLICATION_EXPORT
else:qtsingleapplication-uselib:DEFINES += QT_QTSINGLEAPPLICATION_IMPORT
}

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TEMPLATE=subdirs
CONFIG += ordered
include(common.pri)
qtsingleapplication-uselib:SUBDIRS=buildlib
SUBDIRS+=examples

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qtsinglecoreapplication.h"
#include "qtlocalpeer.h"
/*!
\class QtSingleCoreApplication qtsinglecoreapplication.h
\brief A variant of the QtSingleApplication class for non-GUI applications.
This class is a variant of QtSingleApplication suited for use in
console (non-GUI) applications. It is an extension of
QCoreApplication (instead of QApplication). It does not require
the QtGui library.
The API and usage is identical to QtSingleApplication, except that
functions relating to the "activation window" are not present, for
obvious reasons. Please refer to the QtSingleApplication
documentation for explanation of the usage.
A QtSingleCoreApplication instance can communicate to a
QtSingleApplication instance if they share the same application
id. Hence, this class can be used to create a light-weight
command-line tool that sends commands to a GUI application.
\sa QtSingleApplication
*/
/*!
Creates a QtSingleCoreApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc and \a
argv are passed on to the QCoreAppliation constructor.
*/
QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv)
: QCoreApplication(argc, argv)
{
peer = new QtLocalPeer(this);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Creates a QtSingleCoreApplication object with the application
identifier \a appId. \a argc and \a argv are passed on to the
QCoreAppliation constructor.
*/
QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv)
: QCoreApplication(argc, argv)
{
peer = new QtLocalPeer(this, appId);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Returns true if another instance of this application is running;
otherwise false.
This function does not find instances of this application that are
being run by a different user (on Windows: that are running in
another session).
\sa sendMessage()
*/
bool QtSingleCoreApplication::isRunning()
{
return peer->isClient();
}
/*!
Tries to send the text \a message to the currently running
instance. The QtSingleCoreApplication object in the running instance
will emit the messageReceived() signal when it receives the
message.
This function returns true if the message has been sent to, and
processed by, the current instance. If there is no instance
currently running, or if the running instance fails to process the
message within \a timeout milliseconds, this function return false.
\sa isRunning(), messageReceived()
*/
bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout)
{
return peer->sendMessage(message, timeout);
}
/*!
Returns the application identifier. Two processes with the same
identifier will be regarded as instances of the same application.
*/
QString QtSingleCoreApplication::id() const
{
return peer->applicationId();
}
/*!
\fn void QtSingleCoreApplication::messageReceived(const QString& message)
This signal is emitted when the current instance receives a \a
message from another instance of this application.
\sa sendMessage()
*/

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QTSINGLECOREAPPLICATION_H
#define QTSINGLECOREAPPLICATION_H
#include <QCoreApplication>
class QtLocalPeer;
class QtSingleCoreApplication : public QCoreApplication
{
Q_OBJECT
public:
QtSingleCoreApplication(int &argc, char **argv);
QtSingleCoreApplication(const QString &id, int &argc, char **argv);
bool isRunning();
QString id() const;
public Q_SLOTS:
bool sendMessage(const QString &message, int timeout = 5000);
Q_SIGNALS:
void messageReceived(const QString &message);
private:
QtLocalPeer* peer;
};
#endif // QTSINGLECOREAPPLICATION_H

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INCLUDEPATH += $$PWD
DEPENDPATH += $$PWD
HEADERS += $$PWD/qtsinglecoreapplication.h $$PWD/qtlocalpeer.h
SOURCES += $$PWD/qtsinglecoreapplication.cpp $$PWD/qtlocalpeer.cpp
QT *= network
win32:contains(TEMPLATE, lib):contains(CONFIG, shared) {
DEFINES += QT_QTSINGLECOREAPPLICATION_EXPORT=__declspec(dllexport)
}

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#include "qtlockedfile.h"

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#include "qtsingleapplication.h"

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtlocalpeer.h"
#include <QCoreApplication>
#include <QDataStream>
#include <QRegularExpression>
#include <QTime>
#if defined(Q_OS_WIN)
#include <QLibrary>
#include <qt_windows.h>
typedef BOOL(WINAPI*PProcessIdToSessionId)(DWORD,DWORD*);
static PProcessIdToSessionId pProcessIdToSessionId = 0;
#endif
#if defined(Q_OS_UNIX)
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#endif
namespace QtLP_Private {
#include "qtlockedfile.cpp"
#if defined(Q_OS_WIN)
#include "qtlockedfile_win.cpp"
#else
#include "qtlockedfile_unix.cpp"
#endif
}
const char* QtLocalPeer::ack = "ack";
QtLocalPeer::QtLocalPeer(QObject* parent, const QString &appId)
: QObject(parent), id(appId)
{
QString prefix = id;
if (id.isEmpty()) {
id = QCoreApplication::applicationFilePath();
#if defined(Q_OS_WIN)
id = id.toLower();
#endif
prefix = id.section(QLatin1Char('/'), -1);
}
prefix.remove(QRegularExpression("[^a-zA-Z]"));
prefix.truncate(6);
QByteArray idc = id.toUtf8();
quint16 idNum = qChecksum(idc.constData(), idc.size());
socketName = QLatin1String("qtsingleapp-") + prefix
+ QLatin1Char('-') + QString::number(idNum, 16);
#if defined(Q_OS_WIN)
if (!pProcessIdToSessionId) {
QLibrary lib("kernel32");
pProcessIdToSessionId = (PProcessIdToSessionId)lib.resolve("ProcessIdToSessionId");
}
if (pProcessIdToSessionId) {
DWORD sessionId = 0;
pProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
socketName += QLatin1Char('-') + QString::number(sessionId, 16);
}
#else
socketName += QLatin1Char('-') + QString::number(::getuid(), 16);
#endif
server = new QLocalServer(this);
QString lockName = QDir(QDir::tempPath()).absolutePath()
+ QLatin1Char('/') + socketName
+ QLatin1String("-lockfile");
lockFile.setFileName(lockName);
lockFile.open(QIODevice::ReadWrite);
}
bool QtLocalPeer::isClient()
{
if (lockFile.isLocked())
return false;
if (!lockFile.lock(QtLP_Private::QtLockedFile::WriteLock, false))
return true;
bool res = server->listen(socketName);
#if defined(Q_OS_UNIX) && (QT_VERSION >= QT_VERSION_CHECK(4,5,0))
// ### Workaround
if (!res && server->serverError() == QAbstractSocket::AddressInUseError) {
QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
res = server->listen(socketName);
}
#endif
if (!res)
qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
QObject::connect(server, SIGNAL(newConnection()), SLOT(receiveConnection()));
return false;
}
bool QtLocalPeer::sendMessage(const QString &message, int timeout)
{
if (!isClient())
return false;
QLocalSocket socket;
bool connOk = false;
for(int i = 0; i < 2; i++) {
// Try twice, in case the other instance is just starting up
socket.connectToServer(socketName);
connOk = socket.waitForConnected(timeout/2);
if (connOk || i)
break;
int ms = 250;
#if defined(Q_OS_WIN)
Sleep(DWORD(ms));
#else
struct timespec ts = { ms / 1000, (ms % 1000) * 1000 * 1000 };
nanosleep(&ts, NULL);
#endif
}
if (!connOk)
return false;
QByteArray uMsg(message.toUtf8());
QDataStream ds(&socket);
ds.writeBytes(uMsg.constData(), uMsg.size());
bool res = socket.waitForBytesWritten(timeout);
if (res) {
res &= socket.waitForReadyRead(timeout); // wait for ack
if (res)
res &= (socket.read(qstrlen(ack)) == ack);
}
return res;
}
void QtLocalPeer::receiveConnection()
{
QLocalSocket* socket = server->nextPendingConnection();
if (!socket)
return;
while (true) {
if (socket->state() == QLocalSocket::UnconnectedState) {
qWarning("QtLocalPeer: Peer disconnected");
delete socket;
return;
}
if (socket->bytesAvailable() >= qint64(sizeof(quint32)))
break;
socket->waitForReadyRead();
}
QDataStream ds(socket);
QByteArray uMsg;
quint32 remaining;
ds >> remaining;
uMsg.resize(remaining);
int got = 0;
char* uMsgBuf = uMsg.data();
do {
got = ds.readRawData(uMsgBuf, remaining);
remaining -= got;
uMsgBuf += got;
} while (remaining && got >= 0 && socket->waitForReadyRead(2000));
if (got < 0) {
qWarning("QtLocalPeer: Message reception failed %s", socket->errorString().toLatin1().constData());
delete socket;
return;
}
QString message(QString::fromUtf8(uMsg));
socket->write(ack, qstrlen(ack));
socket->waitForBytesWritten(1000);
socket->waitForDisconnected(1000); // make sure client reads ack
delete socket;
emit messageReceived(message); //### (might take a long time to return)
}

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#ifndef QTLOCALPEER_H
#define QTLOCALPEER_H
#include <QLocalServer>
#include <QLocalSocket>
#include <QDir>
#include "qtlockedfile.h"
class QtLocalPeer : public QObject
{
Q_OBJECT
public:
QtLocalPeer(QObject *parent = 0, const QString &appId = QString());
bool isClient();
bool sendMessage(const QString &message, int timeout);
QString applicationId() const
{ return id; }
Q_SIGNALS:
void messageReceived(const QString &message);
protected Q_SLOTS:
void receiveConnection();
protected:
QString id;
QString socketName;
QLocalServer* server;
QtLP_Private::QtLockedFile lockFile;
private:
static const char* ack;
};
#endif // QTLOCALPEER_H

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtlockedfile.h"
/*!
\class QtLockedFile
\brief The QtLockedFile class extends QFile with advisory locking
functions.
A file may be locked in read or write mode. Multiple instances of
\e QtLockedFile, created in multiple processes running on the same
machine, may have a file locked in read mode. Exactly one instance
may have it locked in write mode. A read and a write lock cannot
exist simultaneously on the same file.
The file locks are advisory. This means that nothing prevents
another process from manipulating a locked file using QFile or
file system functions offered by the OS. Serialization is only
guaranteed if all processes that access the file use
QLockedFile. Also, while holding a lock on a file, a process
must not open the same file again (through any API), or locks
can be unexpectedly lost.
The lock provided by an instance of \e QtLockedFile is released
whenever the program terminates. This is true even when the
program crashes and no destructors are called.
*/
/*! \enum QtLockedFile::LockMode
This enum describes the available lock modes.
\value ReadLock A read lock.
\value WriteLock A write lock.
\value NoLock Neither a read lock nor a write lock.
*/
/*!
Constructs an unlocked \e QtLockedFile object. This constructor
behaves in the same way as \e QFile::QFile().
\sa QFile::QFile()
*/
QtLockedFile::QtLockedFile()
: QFile()
{
#ifdef Q_OS_WIN
wmutex = 0;
rmutex = 0;
#endif
m_lock_mode = NoLock;
}
/*!
Constructs an unlocked QtLockedFile object with file \a name. This
constructor behaves in the same way as \e QFile::QFile(const
QString&).
\sa QFile::QFile()
*/
QtLockedFile::QtLockedFile(const QString &name)
: QFile(name)
{
#ifdef Q_OS_WIN
wmutex = 0;
rmutex = 0;
#endif
m_lock_mode = NoLock;
}
/*!
Opens the file in OpenMode \a mode.
This is identical to QFile::open(), with the one exception that the
Truncate mode flag is disallowed. Truncation would conflict with the
advisory file locking, since the file would be modified before the
write lock is obtained. If truncation is required, use resize(0)
after obtaining the write lock.
Returns true if successful; otherwise false.
\sa QFile::open(), QFile::resize()
*/
bool QtLockedFile::open(OpenMode mode)
{
if (mode & QIODevice::Truncate) {
qWarning("QtLockedFile::open(): Truncate mode not allowed.");
return false;
}
return QFile::open(mode);
}
/*!
Returns \e true if this object has a in read or write lock;
otherwise returns \e false.
\sa lockMode()
*/
bool QtLockedFile::isLocked() const
{
return m_lock_mode != NoLock;
}
/*!
Returns the type of lock currently held by this object, or \e
QtLockedFile::NoLock.
\sa isLocked()
*/
QtLockedFile::LockMode QtLockedFile::lockMode() const
{
return m_lock_mode;
}
/*!
\fn bool QtLockedFile::lock(LockMode mode, bool block = true)
Obtains a lock of type \a mode. The file must be opened before it
can be locked.
If \a block is true, this function will block until the lock is
aquired. If \a block is false, this function returns \e false
immediately if the lock cannot be aquired.
If this object already has a lock of type \a mode, this function
returns \e true immediately. If this object has a lock of a
different type than \a mode, the lock is first released and then a
new lock is obtained.
This function returns \e true if, after it executes, the file is
locked by this object, and \e false otherwise.
\sa unlock(), isLocked(), lockMode()
*/
/*!
\fn bool QtLockedFile::unlock()
Releases a lock.
If the object has no lock, this function returns immediately.
This function returns \e true if, after it executes, the file is
not locked by this object, and \e false otherwise.
\sa lock(), isLocked(), lockMode()
*/
/*!
\fn QtLockedFile::~QtLockedFile()
Destroys the \e QtLockedFile object. If any locks were held, they
are released.
*/

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#ifndef QTLOCKEDFILE_H
#define QTLOCKEDFILE_H
#include <QFile>
#ifdef Q_OS_WIN
#include <QVector>
#endif
#if defined(Q_OS_WIN)
# if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
# define QT_QTLOCKEDFILE_EXPORT
# elif defined(QT_QTLOCKEDFILE_IMPORT)
# if defined(QT_QTLOCKEDFILE_EXPORT)
# undef QT_QTLOCKEDFILE_EXPORT
# endif
# define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
# elif defined(QT_QTLOCKEDFILE_EXPORT)
# undef QT_QTLOCKEDFILE_EXPORT
# define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
# endif
#else
# define QT_QTLOCKEDFILE_EXPORT
#endif
namespace QtLP_Private {
class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
{
public:
enum LockMode { NoLock = 0, ReadLock, WriteLock };
QtLockedFile();
QtLockedFile(const QString &name);
~QtLockedFile();
bool open(OpenMode mode);
bool lock(LockMode mode, bool block = true);
bool unlock();
bool isLocked() const;
LockMode lockMode() const;
private:
#ifdef Q_OS_WIN
Qt::HANDLE wmutex;
Qt::HANDLE rmutex;
QVector<Qt::HANDLE> rmutexes;
QString mutexname;
Qt::HANDLE getMutexHandle(int idx, bool doCreate);
bool waitMutex(Qt::HANDLE mutex, bool doBlock);
#endif
LockMode m_lock_mode;
};
}
#endif

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>
#include "qtlockedfile.h"
bool QtLockedFile::lock(LockMode mode, bool block)
{
if (!isOpen()) {
qWarning("QtLockedFile::lock(): file is not opened");
return false;
}
if (mode == NoLock)
return unlock();
if (mode == m_lock_mode)
return true;
if (m_lock_mode != NoLock)
unlock();
struct flock fl;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = (mode == ReadLock) ? F_RDLCK : F_WRLCK;
int cmd = block ? F_SETLKW : F_SETLK;
int ret = fcntl(handle(), cmd, &fl);
if (ret == -1) {
if (errno != EINTR && errno != EAGAIN)
qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
return false;
}
m_lock_mode = mode;
return true;
}
bool QtLockedFile::unlock()
{
if (!isOpen()) {
qWarning("QtLockedFile::unlock(): file is not opened");
return false;
}
if (!isLocked())
return true;
struct flock fl;
fl.l_whence = SEEK_SET;
fl.l_start = 0;
fl.l_len = 0;
fl.l_type = F_UNLCK;
int ret = fcntl(handle(), F_SETLKW, &fl);
if (ret == -1) {
qWarning("QtLockedFile::lock(): fcntl: %s", strerror(errno));
return false;
}
m_lock_mode = NoLock;
return true;
}
QtLockedFile::~QtLockedFile()
{
if (isOpen())
unlock();
}

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtlockedfile.h"
#include <qt_windows.h>
#include <QFileInfo>
#define MUTEX_PREFIX "QtLockedFile mutex "
// Maximum number of concurrent read locks. Must not be greater than MAXIMUM_WAIT_OBJECTS
#define MAX_READERS MAXIMUM_WAIT_OBJECTS
#if QT_VERSION >= 0x050000
#define QT_WA(unicode, ansi) unicode
#endif
Qt::HANDLE QtLockedFile::getMutexHandle(int idx, bool doCreate)
{
if (mutexname.isEmpty()) {
QFileInfo fi(*this);
mutexname = QString::fromLatin1(MUTEX_PREFIX)
+ fi.absoluteFilePath().toLower();
}
QString mname(mutexname);
if (idx >= 0)
mname += QString::number(idx);
Qt::HANDLE mutex;
if (doCreate) {
QT_WA( { mutex = CreateMutexW(NULL, FALSE, (TCHAR*)mname.utf16()); },
{ mutex = CreateMutexA(NULL, FALSE, mname.toLocal8Bit().constData()); } );
if (!mutex) {
qErrnoWarning("QtLockedFile::lock(): CreateMutex failed");
return 0;
}
}
else {
QT_WA( { mutex = OpenMutexW(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, (TCHAR*)mname.utf16()); },
{ mutex = OpenMutexA(SYNCHRONIZE | MUTEX_MODIFY_STATE, FALSE, mname.toLocal8Bit().constData()); } );
if (!mutex) {
if (GetLastError() != ERROR_FILE_NOT_FOUND)
qErrnoWarning("QtLockedFile::lock(): OpenMutex failed");
return 0;
}
}
return mutex;
}
bool QtLockedFile::waitMutex(Qt::HANDLE mutex, bool doBlock)
{
Q_ASSERT(mutex);
DWORD res = WaitForSingleObject(mutex, doBlock ? INFINITE : 0);
switch (res) {
case WAIT_OBJECT_0:
case WAIT_ABANDONED:
return true;
break;
case WAIT_TIMEOUT:
break;
default:
qErrnoWarning("QtLockedFile::lock(): WaitForSingleObject failed");
}
return false;
}
bool QtLockedFile::lock(LockMode mode, bool block)
{
if (!isOpen()) {
qWarning("QtLockedFile::lock(): file is not opened");
return false;
}
if (mode == NoLock)
return unlock();
if (mode == m_lock_mode)
return true;
if (m_lock_mode != NoLock)
unlock();
if (!wmutex && !(wmutex = getMutexHandle(-1, true)))
return false;
if (!waitMutex(wmutex, block))
return false;
if (mode == ReadLock) {
int idx = 0;
for (; idx < MAX_READERS; idx++) {
rmutex = getMutexHandle(idx, false);
if (!rmutex || waitMutex(rmutex, false))
break;
CloseHandle(rmutex);
}
bool ok = true;
if (idx >= MAX_READERS) {
qWarning("QtLockedFile::lock(): too many readers");
rmutex = 0;
ok = false;
}
else if (!rmutex) {
rmutex = getMutexHandle(idx, true);
if (!rmutex || !waitMutex(rmutex, false))
ok = false;
}
if (!ok && rmutex) {
CloseHandle(rmutex);
rmutex = 0;
}
ReleaseMutex(wmutex);
if (!ok)
return false;
}
else {
Q_ASSERT(rmutexes.isEmpty());
for (int i = 0; i < MAX_READERS; i++) {
Qt::HANDLE mutex = getMutexHandle(i, false);
if (mutex)
rmutexes.append(mutex);
}
if (rmutexes.size()) {
DWORD res = WaitForMultipleObjects(rmutexes.size(), rmutexes.constData(),
TRUE, block ? INFINITE : 0);
if (res != WAIT_OBJECT_0 && res != WAIT_ABANDONED) {
if (res != WAIT_TIMEOUT)
qErrnoWarning("QtLockedFile::lock(): WaitForMultipleObjects failed");
m_lock_mode = WriteLock; // trick unlock() to clean up - semiyucky
unlock();
return false;
}
}
}
m_lock_mode = mode;
return true;
}
bool QtLockedFile::unlock()
{
if (!isOpen()) {
qWarning("QtLockedFile::unlock(): file is not opened");
return false;
}
if (!isLocked())
return true;
if (m_lock_mode == ReadLock) {
ReleaseMutex(rmutex);
CloseHandle(rmutex);
rmutex = 0;
}
else {
foreach(Qt::HANDLE mutex, rmutexes) {
ReleaseMutex(mutex);
CloseHandle(mutex);
}
rmutexes.clear();
ReleaseMutex(wmutex);
}
m_lock_mode = QtLockedFile::NoLock;
return true;
}
QtLockedFile::~QtLockedFile()
{
if (isOpen())
unlock();
if (wmutex)
CloseHandle(wmutex);
}

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtsingleapplication.h"
#include "qtlocalpeer.h"
#include <QWidget>
/*!
\class QtSingleApplication qtsingleapplication.h
\brief The QtSingleApplication class provides an API to detect and
communicate with running instances of an application.
This class allows you to create applications where only one
instance should be running at a time. I.e., if the user tries to
launch another instance, the already running instance will be
activated instead. Another usecase is a client-server system,
where the first started instance will assume the role of server,
and the later instances will act as clients of that server.
By default, the full path of the executable file is used to
determine whether two processes are instances of the same
application. You can also provide an explicit identifier string
that will be compared instead.
The application should create the QtSingleApplication object early
in the startup phase, and call isRunning() to find out if another
instance of this application is already running. If isRunning()
returns false, it means that no other instance is running, and
this instance has assumed the role as the running instance. In
this case, the application should continue with the initialization
of the application user interface before entering the event loop
with exec(), as normal.
The messageReceived() signal will be emitted when the running
application receives messages from another instance of the same
application. When a message is received it might be helpful to the
user to raise the application so that it becomes visible. To
facilitate this, QtSingleApplication provides the
setActivationWindow() function and the activateWindow() slot.
If isRunning() returns true, another instance is already
running. It may be alerted to the fact that another instance has
started by using the sendMessage() function. Also data such as
startup parameters (e.g. the name of the file the user wanted this
new instance to open) can be passed to the running instance with
this function. Then, the application should terminate (or enter
client mode).
If isRunning() returns true, but sendMessage() fails, that is an
indication that the running instance is frozen.
Here's an example that shows how to convert an existing
application to use QtSingleApplication. It is very simple and does
not make use of all QtSingleApplication's functionality (see the
examples for that).
\code
// Original
int main(int argc, char **argv)
{
QApplication app(argc, argv);
MyMainWidget mmw;
mmw.show();
return app.exec();
}
// Single instance
int main(int argc, char **argv)
{
QtSingleApplication app(argc, argv);
if (app.isRunning())
return !app.sendMessage(someDataString);
MyMainWidget mmw;
app.setActivationWindow(&mmw);
mmw.show();
return app.exec();
}
\endcode
Once this QtSingleApplication instance is destroyed (normally when
the process exits or crashes), when the user next attempts to run the
application this instance will not, of course, be encountered. The
next instance to call isRunning() or sendMessage() will assume the
role as the new running instance.
For console (non-GUI) applications, QtSingleCoreApplication may be
used instead of this class, to avoid the dependency on the QtGui
library.
\sa QtSingleCoreApplication
*/
void QtSingleApplication::sysInit(const QString &appId)
{
actWin = 0;
peer = new QtLocalPeer(this, appId);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Creates a QtSingleApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc, \a
argv, and \a GUIenabled are passed on to the QAppliation constructor.
If you are creating a console application (i.e. setting \a
GUIenabled to false), you may consider using
QtSingleCoreApplication instead.
*/
QtSingleApplication::QtSingleApplication(int &argc, char **argv, bool GUIenabled)
: QApplication(argc, argv, GUIenabled)
{
sysInit();
}
/*!
Creates a QtSingleApplication object with the application
identifier \a appId. \a argc and \a argv are passed on to the
QAppliation constructor.
*/
QtSingleApplication::QtSingleApplication(const QString &appId, int &argc, char **argv)
: QApplication(argc, argv)
{
sysInit(appId);
}
#if QT_VERSION < 0x050000
/*!
Creates a QtSingleApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc, \a
argv, and \a type are passed on to the QAppliation constructor.
*/
QtSingleApplication::QtSingleApplication(int &argc, char **argv, Type type)
: QApplication(argc, argv, type)
{
sysInit();
}
# if defined(Q_WS_X11)
/*!
Special constructor for X11, ref. the documentation of
QApplication's corresponding constructor. The application identifier
will be QCoreApplication::applicationFilePath(). \a dpy, \a visual,
and \a cmap are passed on to the QApplication constructor.
*/
QtSingleApplication::QtSingleApplication(Display* dpy, Qt::HANDLE visual, Qt::HANDLE cmap)
: QApplication(dpy, visual, cmap)
{
sysInit();
}
/*!
Special constructor for X11, ref. the documentation of
QApplication's corresponding constructor. The application identifier
will be QCoreApplication::applicationFilePath(). \a dpy, \a argc, \a
argv, \a visual, and \a cmap are passed on to the QApplication
constructor.
*/
QtSingleApplication::QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
: QApplication(dpy, argc, argv, visual, cmap)
{
sysInit();
}
/*!
Special constructor for X11, ref. the documentation of
QApplication's corresponding constructor. The application identifier
will be \a appId. \a dpy, \a argc, \a
argv, \a visual, and \a cmap are passed on to the QApplication
constructor.
*/
QtSingleApplication::QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual, Qt::HANDLE cmap)
: QApplication(dpy, argc, argv, visual, cmap)
{
sysInit(appId);
}
# endif // Q_WS_X11
#endif // QT_VERSION < 0x050000
/*!
Returns true if another instance of this application is running;
otherwise false.
This function does not find instances of this application that are
being run by a different user (on Windows: that are running in
another session).
\sa sendMessage()
*/
bool QtSingleApplication::isRunning()
{
return peer->isClient();
}
/*!
Tries to send the text \a message to the currently running
instance. The QtSingleApplication object in the running instance
will emit the messageReceived() signal when it receives the
message.
This function returns true if the message has been sent to, and
processed by, the current instance. If there is no instance
currently running, or if the running instance fails to process the
message within \a timeout milliseconds, this function return false.
\sa isRunning(), messageReceived()
*/
bool QtSingleApplication::sendMessage(const QString &message, int timeout)
{
return peer->sendMessage(message, timeout);
}
/*!
Returns the application identifier. Two processes with the same
identifier will be regarded as instances of the same application.
*/
QString QtSingleApplication::id() const
{
return peer->applicationId();
}
/*!
Sets the activation window of this application to \a aw. The
activation window is the widget that will be activated by
activateWindow(). This is typically the application's main window.
If \a activateOnMessage is true (the default), the window will be
activated automatically every time a message is received, just prior
to the messageReceived() signal being emitted.
\sa activateWindow(), messageReceived()
*/
void QtSingleApplication::setActivationWindow(QWidget* aw, bool activateOnMessage)
{
actWin = aw;
if (activateOnMessage)
connect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
else
disconnect(peer, SIGNAL(messageReceived(const QString&)), this, SLOT(activateWindow()));
}
/*!
Returns the applications activation window if one has been set by
calling setActivationWindow(), otherwise returns 0.
\sa setActivationWindow()
*/
QWidget* QtSingleApplication::activationWindow() const
{
return actWin;
}
/*!
De-minimizes, raises, and activates this application's activation window.
This function does nothing if no activation window has been set.
This is a convenience function to show the user that this
application instance has been activated when he has tried to start
another instance.
This function should typically be called in response to the
messageReceived() signal. By default, that will happen
automatically, if an activation window has been set.
\sa setActivationWindow(), messageReceived(), initialize()
*/
void QtSingleApplication::activateWindow()
{
if (actWin) {
actWin->setWindowState(actWin->windowState() & ~Qt::WindowMinimized);
actWin->raise();
actWin->activateWindow();
}
}
/*!
\fn void QtSingleApplication::messageReceived(const QString& message)
This signal is emitted when the current instance receives a \a
message from another instance of this application.
\sa sendMessage(), setActivationWindow(), activateWindow()
*/
/*!
\fn void QtSingleApplication::initialize(bool dummy = true)
\obsolete
*/

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#ifndef QTSINGLEAPPLICATION_H
#define QTSINGLEAPPLICATION_H
#include <QApplication>
class QtLocalPeer;
#if defined(Q_OS_WIN)
# if !defined(QT_QTSINGLEAPPLICATION_EXPORT) && !defined(QT_QTSINGLEAPPLICATION_IMPORT)
# define QT_QTSINGLEAPPLICATION_EXPORT
# elif defined(QT_QTSINGLEAPPLICATION_IMPORT)
# if defined(QT_QTSINGLEAPPLICATION_EXPORT)
# undef QT_QTSINGLEAPPLICATION_EXPORT
# endif
# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllimport)
# elif defined(QT_QTSINGLEAPPLICATION_EXPORT)
# undef QT_QTSINGLEAPPLICATION_EXPORT
# define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllexport)
# endif
#else
# define QT_QTSINGLEAPPLICATION_EXPORT
#endif
class QT_QTSINGLEAPPLICATION_EXPORT QtSingleApplication : public QApplication
{
Q_OBJECT
public:
QtSingleApplication(int &argc, char **argv, bool GUIenabled = true);
QtSingleApplication(const QString &id, int &argc, char **argv);
#if QT_VERSION < 0x050000
QtSingleApplication(int &argc, char **argv, Type type);
# if defined(Q_WS_X11)
QtSingleApplication(Display* dpy, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
QtSingleApplication(Display *dpy, int &argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE cmap= 0);
QtSingleApplication(Display* dpy, const QString &appId, int argc, char **argv, Qt::HANDLE visual = 0, Qt::HANDLE colormap = 0);
# endif // Q_WS_X11
#endif // QT_VERSION < 0x050000
bool isRunning();
QString id() const;
void setActivationWindow(QWidget* aw, bool activateOnMessage = true);
QWidget* activationWindow() const;
// Obsolete:
void initialize(bool dummy = true)
{ isRunning(); Q_UNUSED(dummy) }
public Q_SLOTS:
bool sendMessage(const QString &message, int timeout = 5000);
void activateWindow();
Q_SIGNALS:
void messageReceived(const QString &message);
private:
void sysInit(const QString &appId = QString());
QtLocalPeer *peer;
QWidget *actWin;
};
#endif // QTSINGLEAPPLICATION_H

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include(../common.pri)
INCLUDEPATH += $$PWD
DEPENDPATH += $$PWD
QT *= network
greaterThan(QT_MAJOR_VERSION, 4): QT *= widgets
qtsingleapplication-uselib:!qtsingleapplication-buildlib {
LIBS += -L$$QTSINGLEAPPLICATION_LIBDIR -l$$QTSINGLEAPPLICATION_LIBNAME
} else {
SOURCES += $$PWD/qtsingleapplication.cpp $$PWD/qtlocalpeer.cpp
HEADERS += $$PWD/qtsingleapplication.h $$PWD/qtlocalpeer.h
}
win32 {
contains(TEMPLATE, lib):contains(CONFIG, shared):DEFINES += QT_QTSINGLEAPPLICATION_EXPORT
else:qtsingleapplication-uselib:DEFINES += QT_QTSINGLEAPPLICATION_IMPORT
}

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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtsinglecoreapplication.h"
#include "qtlocalpeer.h"
/*!
\class QtSingleCoreApplication qtsinglecoreapplication.h
\brief A variant of the QtSingleApplication class for non-GUI applications.
This class is a variant of QtSingleApplication suited for use in
console (non-GUI) applications. It is an extension of
QCoreApplication (instead of QApplication). It does not require
the QtGui library.
The API and usage is identical to QtSingleApplication, except that
functions relating to the "activation window" are not present, for
obvious reasons. Please refer to the QtSingleApplication
documentation for explanation of the usage.
A QtSingleCoreApplication instance can communicate to a
QtSingleApplication instance if they share the same application
id. Hence, this class can be used to create a light-weight
command-line tool that sends commands to a GUI application.
\sa QtSingleApplication
*/
/*!
Creates a QtSingleCoreApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc and \a
argv are passed on to the QCoreAppliation constructor.
*/
QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv)
: QCoreApplication(argc, argv)
{
peer = new QtLocalPeer(this);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Creates a QtSingleCoreApplication object with the application
identifier \a appId. \a argc and \a argv are passed on to the
QCoreAppliation constructor.
*/
QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv)
: QCoreApplication(argc, argv)
{
peer = new QtLocalPeer(this, appId);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Returns true if another instance of this application is running;
otherwise false.
This function does not find instances of this application that are
being run by a different user (on Windows: that are running in
another session).
\sa sendMessage()
*/
bool QtSingleCoreApplication::isRunning()
{
return peer->isClient();
}
/*!
Tries to send the text \a message to the currently running
instance. The QtSingleCoreApplication object in the running instance
will emit the messageReceived() signal when it receives the
message.
This function returns true if the message has been sent to, and
processed by, the current instance. If there is no instance
currently running, or if the running instance fails to process the
message within \a timeout milliseconds, this function return false.
\sa isRunning(), messageReceived()
*/
bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout)
{
return peer->sendMessage(message, timeout);
}
/*!
Returns the application identifier. Two processes with the same
identifier will be regarded as instances of the same application.
*/
QString QtSingleCoreApplication::id() const
{
return peer->applicationId();
}
/*!
\fn void QtSingleCoreApplication::messageReceived(const QString& message)
This signal is emitted when the current instance receives a \a
message from another instance of this application.
\sa sendMessage()
*/

34
3rd-parties/qtsingleapplication/src/qtsinglecoreapplication.h Normal file
View File

@ -0,0 +1,34 @@
// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#ifndef QTSINGLECOREAPPLICATION_H
#define QTSINGLECOREAPPLICATION_H
#include <QCoreApplication>
class QtLocalPeer;
class QtSingleCoreApplication : public QCoreApplication
{
Q_OBJECT
public:
QtSingleCoreApplication(int &argc, char **argv);
QtSingleCoreApplication(const QString &id, int &argc, char **argv);
bool isRunning();
QString id() const;
public Q_SLOTS:
bool sendMessage(const QString &message, int timeout = 5000);
Q_SIGNALS:
void messageReceived(const QString &message);
private:
QtLocalPeer* peer;
};
#endif // QTSINGLECOREAPPLICATION_H

10
3rd-parties/qtsingleapplication/src/qtsinglecoreapplication.pri Normal file
View File

@ -0,0 +1,10 @@
INCLUDEPATH += $$PWD
DEPENDPATH += $$PWD
HEADERS += $$PWD/qtsinglecoreapplication.h $$PWD/qtlocalpeer.h
SOURCES += $$PWD/qtsinglecoreapplication.cpp $$PWD/qtlocalpeer.cpp
QT *= network
win32:contains(TEMPLATE, lib):contains(CONFIG, shared) {
DEFINES += QT_QTSINGLECOREAPPLICATION_EXPORT=__declspec(dllexport)
}

5
CMakeLists.txt
View File

@ -43,9 +43,9 @@ endforeach()
message(STATUS "External libraries found: ${UKUI_MENU_EXTERNAL_LIBS}")
# include single-application
add_subdirectory(3rd-parties/SingleApplication)
add_subdirectory(3rd-parties/qtsingleapplication)
# static lib of single-application.
set(SingleApplication "SingleApplication")
set(SingleApplication "qtsingleapplication")
# include文件夹
include_directories(src)
@ -56,6 +56,7 @@ include_directories(src/settings)
include_directories(src/uiconfig)
include_directories(src/windows)
include_directories(src/utils)
include_directories(3rd-parties/qtsingleapplication/src)
# 用于Qt Creator识别自定义qml模块的导入路径
list(APPEND QML_MODULE_DIRS "${PROJECT_SOURCE_DIR}/qml")

17
src/main.cpp
View File

@ -4,7 +4,7 @@
#include <QFile>
#include <QDebug>
#include "singleapplication.h"
#include "qtsingleapplication.h"
#include "ukui-menu-application.h"
int main(int argc, char *argv[])
@ -25,7 +25,7 @@ int main(int argc, char *argv[])
QString appid = QString("ukui-menu-%1").arg(QLatin1String(getenv("DISPLAY")));
SingleApplication app(argc, argv, appid.toUtf8(), true);
QtSingleApplication app(appid, argc, argv);
QTranslator translator;
QString translationFile{(QString(UKUI_MENU_TRANSLATION_DIR) + "/ukui-menu_" + QLocale::system().name() + ".qm")};
@ -37,18 +37,17 @@ int main(int argc, char *argv[])
UkuiMenu::MenuMessageProcessor messageProcessor;
if (app.isSecondary()) {
if (UkuiMenu::MenuMessageProcessor::preprocessMessage(SingleApplication::arguments())) {
app.sendMessage(SingleApplication::arguments().join(" ").toUtf8());
if (app.isRunning()) {
if (UkuiMenu::MenuMessageProcessor::preprocessMessage(QtSingleApplication::arguments())) {
app.sendMessage(QtSingleApplication::arguments().join(" ").toUtf8());
}
return 0;
}
UkuiMenu::UkuiMenuApplication menuApplication(&messageProcessor);
messageProcessor.processMessage(app.instanceId(), SingleApplication::arguments().join(" ").toUtf8());
QObject::connect(&app, &SingleApplication::receivedMessage,
messageProcessor.processMessage(QtSingleApplication::arguments().join(" ").toUtf8());
QObject::connect(&app, &QtSingleApplication::messageReceived,
&messageProcessor, &UkuiMenu::MenuMessageProcessor::processMessage);
return SingleApplication::exec();
return QtSingleApplication::exec();
}

29
src/ukui-menu-application.cpp
View File

@ -163,28 +163,28 @@ UkuiMenuApplication::~UkuiMenuApplication()
}
// == MenuMessageProcessor == //
QCommandLineOption MenuMessageProcessor::showUkuiMenu({"s", "show"}, QObject::tr("Show ukui-menu."));
QCommandLineOption MenuMessageProcessor::quitUkuiMenu({"q", "quit"}, QObject::tr("Quit ukui-menu."));
MenuMessageProcessor::MenuMessageProcessor() : QObject(nullptr) {}
void MenuMessageProcessor::processMessage(quint32 instanceId, const QByteArray &message)
void MenuMessageProcessor::processMessage(const QString &message)
{
Q_UNUSED(instanceId);
QStringList options = QString(message).split(' ');
QCommandLineParser parser;
QCommandLineOption showUkuiMenu({"s", "show"}, QObject::tr("Show ukui-menu."));
QCommandLineOption quitUkuiMenu({"q", "quit"}, QObject::tr("Quit ukui-menu."));
parser.addOption(showUkuiMenu);
parser.addOption(quitUkuiMenu);
parser.addOption(MenuMessageProcessor::showUkuiMenu);
parser.addOption(MenuMessageProcessor::quitUkuiMenu);
parser.parse(options);
if (parser.isSet(showUkuiMenu)) {
if (parser.isSet(MenuMessageProcessor::showUkuiMenu)) {
Q_EMIT request(UkuiMenuApplication::Show);
return;
}
if (parser.isSet(quitUkuiMenu)) {
if (parser.isSet(MenuMessageProcessor::quitUkuiMenu)) {
Q_EMIT request(UkuiMenuApplication::Quit);
return;
}
@ -198,17 +198,14 @@ void MenuMessageProcessor::processMessage(quint32 instanceId, const QByteArray &
*/
bool MenuMessageProcessor::preprocessMessage(const QStringList& message)
{
qDebug() << "ukui-menu processMessage" << message;
qDebug() << "Hey, there.";
QCommandLineParser parser;
QCommandLineOption showUkuiMenu({"s", "show"}, QObject::tr("Show ukui-menu."));
QCommandLineOption quitUkuiMenu({"q", "quit"}, QObject::tr("Quit ukui-menu."));
QCommandLineOption helpOption = parser.addHelpOption();
QCommandLineOption versionOption = parser.addVersionOption();
parser.addOption(showUkuiMenu);
parser.addOption(quitUkuiMenu);
parser.addOption(MenuMessageProcessor::showUkuiMenu);
parser.addOption(MenuMessageProcessor::quitUkuiMenu);
parser.parse(message);
@ -225,5 +222,5 @@ bool MenuMessageProcessor::preprocessMessage(const QStringList& message)
return false;
}
return parser.isSet(showUkuiMenu) || parser.isSet(quitUkuiMenu);
return parser.isSet(MenuMessageProcessor::showUkuiMenu) || parser.isSet(MenuMessageProcessor::quitUkuiMenu);
}

6
src/ukui-menu-application.h
View File

@ -22,6 +22,8 @@
#include "menu-dbus-service.h"
#include <QQmlEngine>
class QCommandLineOption;
namespace UkuiMenu {
class MenuMessageProcessor;
@ -66,9 +68,11 @@ class MenuMessageProcessor : public QObject
public:
MenuMessageProcessor();
static bool preprocessMessage(const QStringList& message);
static QCommandLineOption showUkuiMenu;
static QCommandLineOption quitUkuiMenu;
public Q_SLOTS:
void processMessage(quint32 instanceId, const QByteArray& message);
void processMessage(const QString &message);
Q_SIGNALS:
void request(UkuiMenuApplication::Command command);