316 lines
12 KiB
C++
316 lines
12 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the demonstration applications of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "browser.h"
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#include "qsqlconnectiondialog.h"
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#include <QtWidgets>
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#include <QtSql>
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Browser::Browser(QWidget *parent)
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: QWidget(parent)
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{
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setupUi(this);
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table->addAction(insertRowAction);
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table->addAction(deleteRowAction);
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table->addAction(fieldStrategyAction);
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table->addAction(rowStrategyAction);
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table->addAction(manualStrategyAction);
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table->addAction(submitAction);
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table->addAction(revertAction);
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table->addAction(selectAction);
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if (QSqlDatabase::drivers().isEmpty())
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QMessageBox::information(this, tr("No database drivers found"),
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tr("This demo requires at least one Qt database driver. "
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"Please check the documentation how to build the "
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"Qt SQL plugins."));
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emit statusMessage(tr("Ready."));
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}
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Browser::~Browser()
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{
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}
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void Browser::exec()
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{
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QSqlQueryModel *model = new QSqlQueryModel(table);
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model->setQuery(QSqlQuery(sqlEdit->toPlainText(), connectionWidget->currentDatabase()));
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table->setModel(model);
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if (model->lastError().type() != QSqlError::NoError)
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emit statusMessage(model->lastError().text());
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else if (model->query().isSelect())
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emit statusMessage(tr("Query OK."));
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else
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emit statusMessage(tr("Query OK, number of affected rows: %1").arg(
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model->query().numRowsAffected()));
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updateActions();
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}
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QSqlError Browser::addConnection(const QString &driver, const QString &dbName, const QString &host,
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const QString &user, const QString &passwd, int port)
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{
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static int cCount = 0;
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QSqlError err;
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QSqlDatabase db = QSqlDatabase::addDatabase(driver, QString("Browser%1").arg(++cCount));
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db.setDatabaseName(dbName);
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db.setHostName(host);
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db.setPort(port);
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if (!db.open(user, passwd)) {
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err = db.lastError();
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db = QSqlDatabase();
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QSqlDatabase::removeDatabase(QString("Browser%1").arg(cCount));
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}
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connectionWidget->refresh();
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return err;
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}
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void Browser::addConnection()
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{
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QSqlConnectionDialog dialog(this);
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if (dialog.exec() != QDialog::Accepted)
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return;
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if (dialog.useInMemoryDatabase()) {
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QSqlDatabase::database("in_mem_db", false).close();
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QSqlDatabase::removeDatabase("in_mem_db");
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QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "in_mem_db");
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db.setDatabaseName(":memory:");
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if (!db.open())
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QMessageBox::warning(this, tr("Unable to open database"), tr("An error occurred while "
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"opening the connection: ") + db.lastError().text());
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QSqlQuery q("", db);
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q.exec("drop table Movies");
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q.exec("drop table Names");
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q.exec("create table Movies (id integer primary key, Title varchar, Director varchar, Rating number)");
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q.exec("insert into Movies values (0, 'Metropolis', 'Fritz Lang', '8.4')");
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q.exec("insert into Movies values (1, 'Nosferatu, eine Symphonie des Grauens', 'F.W. Murnau', '8.1')");
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q.exec("insert into Movies values (2, 'Bis ans Ende der Welt', 'Wim Wenders', '6.5')");
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q.exec("insert into Movies values (3, 'Hardware', 'Richard Stanley', '5.2')");
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q.exec("insert into Movies values (4, 'Mitchell', 'Andrew V. McLaglen', '2.1')");
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q.exec("create table Names (id integer primary key, Firstname varchar, Lastname varchar, City varchar)");
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q.exec("insert into Names values (0, 'Sala', 'Palmer', 'Morristown')");
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q.exec("insert into Names values (1, 'Christopher', 'Walker', 'Morristown')");
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q.exec("insert into Names values (2, 'Donald', 'Duck', 'Andeby')");
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q.exec("insert into Names values (3, 'Buck', 'Rogers', 'Paris')");
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q.exec("insert into Names values (4, 'Sherlock', 'Holmes', 'London')");
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connectionWidget->refresh();
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} else {
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QSqlError err = addConnection(dialog.driverName(), dialog.databaseName(), dialog.hostName(),
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dialog.userName(), dialog.password(), dialog.port());
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if (err.type() != QSqlError::NoError)
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QMessageBox::warning(this, tr("Unable to open database"), tr("An error occurred while "
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"opening the connection: ") + err.text());
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}
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}
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void Browser::showTable(const QString &t)
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{
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QSqlTableModel *model = new CustomModel(table, connectionWidget->currentDatabase());
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model->setEditStrategy(QSqlTableModel::OnRowChange);
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model->setTable(connectionWidget->currentDatabase().driver()->escapeIdentifier(t, QSqlDriver::TableName));
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model->select();
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if (model->lastError().type() != QSqlError::NoError)
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emit statusMessage(model->lastError().text());
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table->setModel(model);
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table->setEditTriggers(QAbstractItemView::DoubleClicked|QAbstractItemView::EditKeyPressed);
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connect(table->selectionModel(), &QItemSelectionModel::currentRowChanged,
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this, &Browser::currentChanged);
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updateActions();
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}
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void Browser::showMetaData(const QString &t)
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{
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QSqlRecord rec = connectionWidget->currentDatabase().record(t);
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QStandardItemModel *model = new QStandardItemModel(table);
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model->insertRows(0, rec.count());
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model->insertColumns(0, 7);
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model->setHeaderData(0, Qt::Horizontal, "Fieldname");
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model->setHeaderData(1, Qt::Horizontal, "Type");
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model->setHeaderData(2, Qt::Horizontal, "Length");
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model->setHeaderData(3, Qt::Horizontal, "Precision");
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model->setHeaderData(4, Qt::Horizontal, "Required");
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model->setHeaderData(5, Qt::Horizontal, "AutoValue");
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model->setHeaderData(6, Qt::Horizontal, "DefaultValue");
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for (int i = 0; i < rec.count(); ++i) {
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QSqlField fld = rec.field(i);
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model->setData(model->index(i, 0), fld.name());
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model->setData(model->index(i, 1), fld.typeID() == -1
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? QString(QMetaType::typeName(fld.type()))
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: QString("%1 (%2)").arg(QMetaType::typeName(fld.type())).arg(fld.typeID()));
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model->setData(model->index(i, 2), fld.length());
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model->setData(model->index(i, 3), fld.precision());
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model->setData(model->index(i, 4), fld.requiredStatus() == -1 ? QVariant("?")
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: QVariant(bool(fld.requiredStatus())));
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model->setData(model->index(i, 5), fld.isAutoValue());
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model->setData(model->index(i, 6), fld.defaultValue());
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}
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table->setModel(model);
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table->setEditTriggers(QAbstractItemView::NoEditTriggers);
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updateActions();
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}
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void Browser::insertRow()
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{
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QSqlTableModel *model = qobject_cast<QSqlTableModel *>(table->model());
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if (!model)
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return;
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QModelIndex insertIndex = table->currentIndex();
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int row = insertIndex.row() == -1 ? 0 : insertIndex.row();
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model->insertRow(row);
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insertIndex = model->index(row, 0);
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table->setCurrentIndex(insertIndex);
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table->edit(insertIndex);
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}
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void Browser::deleteRow()
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{
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QSqlTableModel *model = qobject_cast<QSqlTableModel *>(table->model());
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if (!model)
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return;
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QModelIndexList currentSelection = table->selectionModel()->selectedIndexes();
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for (int i = 0; i < currentSelection.count(); ++i) {
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if (currentSelection.at(i).column() != 0)
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continue;
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model->removeRow(currentSelection.at(i).row());
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}
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updateActions();
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}
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void Browser::updateActions()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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bool enableIns = tm;
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bool enableDel = enableIns && table->currentIndex().isValid();
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insertRowAction->setEnabled(enableIns);
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deleteRowAction->setEnabled(enableDel);
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fieldStrategyAction->setEnabled(tm);
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rowStrategyAction->setEnabled(tm);
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manualStrategyAction->setEnabled(tm);
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submitAction->setEnabled(tm);
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revertAction->setEnabled(tm);
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selectAction->setEnabled(tm);
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if (tm) {
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QSqlTableModel::EditStrategy es = tm->editStrategy();
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fieldStrategyAction->setChecked(es == QSqlTableModel::OnFieldChange);
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rowStrategyAction->setChecked(es == QSqlTableModel::OnRowChange);
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manualStrategyAction->setChecked(es == QSqlTableModel::OnManualSubmit);
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}
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}
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void Browser::about()
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{
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QMessageBox::about(this, tr("About"), tr("The SQL Browser demonstration "
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"shows how a data browser can be used to visualize the results of SQL"
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"statements on a live database"));
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}
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void Browser::on_fieldStrategyAction_triggered()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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if (tm)
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tm->setEditStrategy(QSqlTableModel::OnFieldChange);
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}
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void Browser::on_rowStrategyAction_triggered()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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if (tm)
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tm->setEditStrategy(QSqlTableModel::OnRowChange);
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}
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void Browser::on_manualStrategyAction_triggered()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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if (tm)
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tm->setEditStrategy(QSqlTableModel::OnManualSubmit);
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}
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void Browser::on_submitAction_triggered()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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if (tm)
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tm->submitAll();
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}
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void Browser::on_revertAction_triggered()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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if (tm)
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tm->revertAll();
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}
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void Browser::on_selectAction_triggered()
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{
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QSqlTableModel * tm = qobject_cast<QSqlTableModel *>(table->model());
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if (tm)
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tm->select();
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}
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