1 files changed, 183 insertions, 0 deletions
diff --git a/doc/src/snippets/code/src_gui_kernel_qapplication.cpp b/doc/src/snippets/code/src_gui_kernel_qapplication.cpp
new file mode 100644
index 0000000000..bb0cdde200
--- /dev/null
+++ b/doc/src/snippets/code/src_gui_kernel_qapplication.cpp
@@ -0,0 +1,183 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 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]