fullscreen button from qt maemo example

diff --git a/colorflood/src/fullscreenexitbutton.hpp b/colorflood/src/fullscreenexitbutton.hpp
new file mode 100644 (file)
index 0000000..a11f20f
--- /dev/null
+++ b/colorflood/src/fullscreenexitbutton.hpp
@@ -0,0 +1,85 @@
+/*
+  Copyright 2010 Serge Ziryukin <ftrvxmtrx@gmail.com>
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; version 2 of the License.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+*/
+
+#ifndef _FULLSCREENEXITBUTTON_HPP
+#define _FULLSCREENEXITBUTTON_HPP
+
+#include <QToolButton>
+#include <QEvent>
+
+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);
+
+    // set the fullsize icon from Maemo's theme
+    setIcon(QIcon::fromTheme(QLatin1String("general_fullsize")));
+
+    // 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(showNormal()));
+
+    // 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 // !_FULLSCREENEXITBUTTON_HPP