test

[push-it] / src / fullscreenexitbutton.h

diff --git a/src/fullscreenexitbutton.h b/src/fullscreenexitbutton.h
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+/****************************************************************************
+ **
+ ** 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 <QtGui/qtoolbutton.h>
+#include <QtGui/qevent.h>
+
+class FullScreenExitButton : public QToolButton
+{
+  Q_OBJECT
+public:
+  inline explicit FullScreenExitButton(QWidget *parent);
+
+protected:
+  inline bool eventFilter(QObject *obj, QEvent *ev);
+};
+
+FullScreenExitButton::FullScreenExitButton(QWidget *parent)
+  : QToolButton(parent)
+{
+  Q_ASSERT(parent);
+#ifdef Q_WS_MAEMO_5
+  // set the fullsize icon from Maemo's theme
+  setIcon(QIcon::fromTheme(QLatin1String("general_fullsize")));
+#endif
+  // ensure that our size is fixed to our ideal size
+  setFixedSize(sizeHint());
+
+  // set the background to 0.5 alpha
+  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(slotFullscreenExit()));
+
+  // install an event filter to listen for the parent's events
+  parent->installEventFilter(this);
+}
+
+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::WindowStateChange:
+    setVisible(isFullScreen);
+    if (isFullScreen)
+      raise();
+    // fall through
+  case QEvent::Resize:
+    if (isVisible())
+      move(parent->width() - width(),
+           parent->height() - height());
+    break;
+  default:
+    break;
+  }
+
+  return QToolButton::eventFilter(obj, ev);
+}
+
+#endif