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