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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** 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 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
** "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."
** $QT_END_LICENSE$
**
****************************************************************************/
//! [0]
int main(int argc, char **argv)
{
#ifdef Q_WS_X11
bool useGUI = getenv("DISPLAY") != 0;
#else
bool useGUI = true;
#endif
QApplication app(argc, argv, useGUI);
if (useGUI) {
// start GUI version
...
} else {
// start non-GUI version
...
}
return app.exec();
}
//! [0]
//! [1]
QApplication::setStyle(new QWindowsStyle);
//! [1]
//! [2]
int main(int argc, char *argv[])
{
QApplication::setColorSpec(QApplication::ManyColor);
QApplication app(argc, argv);
...
return app.exec();
}
//! [2]
//! [3]
QSize MyWidget::sizeHint() const
{
return QSize(80, 25).expandedTo(QApplication::globalStrut());
}
//! [3]
//! [4]
void showAllHiddenTopLevelWidgets()
{
foreach (QWidget *widget, QApplication::topLevelWidgets()) {
if (widget->isHidden())
widget->show();
}
}
//! [4]
//! [5]
void updateAllWidgets()
{
foreach (QWidget *widget, QApplication::allWidgets())
widget->update();
}
//! [5]
//! [6]
int main(int argc, char *argv[])
{
QApplication::setDesktopSettingsAware(false);
QApplication app(argc, argv);
...
return app.exec();
}
//! [6]
//! [7]
if ((startPos - currentPos).manhattanLength() >=
QApplication::startDragDistance())
startTheDrag();
//! [7]
//! [8]
void MyApplication::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
}
}
//! [8]
//! [9]
appname -session id
//! [9]
//! [10]
foreach (const QString &command, mySession.restartCommand())
do_something(command);
//! [10]
//! [11]
foreach (const QString &command, mySession.discardCommand())
do_something(command);
//! [11]
//! [12]
QWidget *widget = qApp->widgetAt(x, y);
if (widget)
widget = widget->window();
//! [12]
//! [13]
QWidget *widget = qApp->widgetAt(point);
if (widget)
widget = widget->window();
//! [13]
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