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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QApplication>
#include <QMessageBox>
#include <QSessionManager>
#include <QWidget>
namespace src_gui_kernel_qguiapplication {
struct MyMainWidget : public QWidget
{
MyMainWidget(QWidget *parent);
void commitData(QSessionManager& manager);
bool saveDocument() { return true; };
QStringList restartCommand() { return QStringList(); };
QStringList discardCommand() { return QStringList(); };
};
MyMainWidget *mainWindow = nullptr;
void do_something(QString command) { Q_UNUSED(command); };
MyMainWidget mySession(nullptr);
//! [0]
int main(int argc, char *argv[])
{
QApplication::setDesktopSettingsAware(false);
QApplication app(argc, argv);
// ...
return app.exec();
}
//! [0]
//! [1]
MyMainWidget::MyMainWidget(QWidget *parent)
: QWidget(parent)
{
connect(qApp, &QGuiApplication::commitDataRequest,
this, &MyMainWidget::commitData);
}
void MyMainWidget::commitData(QSessionManager& manager)
{
if (manager.allowsInteraction()) {
int ret = QMessageBox::warning(
mainWindow,
tr("My Application"),
tr("Save changes to document?"),
QMessageBox::Save | QMessageBox::Discard | QMessageBox::Cancel);
switch (ret) {
case QMessageBox::Save:
manager.release();
if (!saveDocument())
manager.cancel();
break;
case QMessageBox::Discard:
break;
case QMessageBox::Cancel:
default:
manager.cancel();
}
} else {
// we did not get permission to interact, then
// do something reasonable instead
}
}
//! [1]
/* wrap snippet 2
//! [2]
appname -session id
//! [2]
*/ // wrap snippet 2
void wrapper0() {
//! [3]
const QStringList commands = mySession.restartCommand();
for (const QString &command : commands)
do_something(command);
//! [3]
} // wrapper0
void wrapper1() {
//! [4]
const QStringList commands = mySession.discardCommand();
for (const QString &command : mySession.discardCommand())
do_something(command);
//! [4]
} // wrapper1
} // src_gui_kernel_qguiapplication
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