--- /dev/null
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef FULLSCREENEXITBUTTON_H
+#define FULLSCREENEXITBUTTON_H
+
+#include "mainwindow.h"
+
+#include <QtGui/qtoolbutton.h>
+#include <QtGui/qevent.h>
+#include <QTimer>
+
+class FullScreenExitButton : public QToolButton
+{
+ Q_OBJECT
+public:
+ inline explicit FullScreenExitButton(MainWindow *parent);
+
+protected:
+ inline bool eventFilter(QObject *obj, QEvent *ev);
+
+private:
+ QTimer timer;
+};
+
+FullScreenExitButton::FullScreenExitButton(MainWindow *parent)
+ : QToolButton(parent)
+{
+ Q_ASSERT(parent);
+
+ // set the fullsize icon from Maemo's theme
+ setIcon(QIcon("/usr/share/icons/hicolor/48x48/hildon/general_fullsize.png"));
+
+ // ensure that our size is fixed to our ideal size
+ setFixedSize(sizeHint());
+
+ // set the background to 0.5 alpha
+ //TODO doesn't work.
+ QPalette pal = palette();
+ QColor backgroundColor = pal.color(backgroundRole());
+ backgroundColor.setAlpha(128);
+ pal.setColor(backgroundRole(), backgroundColor);
+ setPalette(pal);
+
+ // ensure that we're painting our background
+ setAutoFillBackground(true);
+
+ // when we're clicked, tell the parent to exit fullscreen
+ connect(this, SIGNAL(clicked()), parent, SLOT(toggleFullscreen()));
+
+ // hide after 4s of inactivity
+ connect(&timer, SIGNAL(timeout()), this, SLOT(hide()));
+ timer.setInterval(4000);
+ timer.setSingleShot(true);
+
+ // install an event filter to listen for the parent's events
+ parent->installEventFilter(this);
+
+ setVisible(false); //assuming we don't start in fullscreen
+ timer.start();
+}
+
+bool FullScreenExitButton::eventFilter(QObject *obj, QEvent *ev)
+{
+ if (obj != parent())
+ return QToolButton::eventFilter(obj, ev);
+
+ QWidget *parent = parentWidget();
+ bool isFullScreen = parent->windowState() & Qt::WindowFullScreen;
+
+ switch (ev->type()) {
+ case QEvent::MouseButtonPress:
+ case QEvent::MouseButtonRelease:
+ case QEvent::MouseMove:
+ case QEvent::HoverMove:
+ //fall through to show button
+ case QEvent::WindowStateChange:
+ setVisible(isFullScreen);
+ if (isFullScreen)
+ raise();
+ // fall through
+ case QEvent::Resize:
+ if (isVisible()) {
+ move(parent->width() - width(),
+ parent->height() - height());
+ timer.start();
+ }
+ break;
+ default:
+ break;
+ }
+
+ return QToolButton::eventFilter(obj, ev);
+}
+
+#endif