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diff --git a/qt4/faderwidget.h b/qt4/faderwidget.h
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+/****************************************************************************
+**
+** Copyright (C) 2006 Trolltech AS. All rights reserved.
+**
+** This file is part of the documentation of Qt. It was originally
+** published as part of Qt Quarterly.
+**
+** This file may be used under the terms of the GNU General Public License
+** version 2.0 as published by the Free Software Foundation or under the
+** terms of the Qt Commercial License Agreement. The respective license
+** texts for these are provided with the open source and commercial
+** editions of Qt.
+**
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://www.trolltech.com/products/qt/licensing.html or contact the
+** sales department at [email protected].
+**
+** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+**
+****************************************************************************/
+
+#ifndef FADERWIDGET_H
+#define FADERWIDGET_H
+
+#include <QWidget>
+
+class QTimer;
+
+class FaderWidget : public QWidget
+{
+    Q_OBJECT
+    Q_PROPERTY(QColor fadeColor READ fadeColor WRITE setFadeColor)
+    Q_PROPERTY(int fadeDuration READ fadeDuration WRITE setFadeDuration)
+
+public:
+    FaderWidget(QWidget *parent);
+
+    QColor fadeColor() const { return startColor; }
+    void setFadeColor(const QColor &newColor) { startColor = newColor; }
+
+    int fadeDuration() const { return duration; }
+    void setFadeDuration(int milliseconds) { duration = milliseconds; }
+
+    void start();
+    void startFadeOut();
+
+signals:
+    void done(QWidget *w);
+
+protected:
+    void paintEvent(QPaintEvent *event);
+
+private:
+    QTimer *timer;
+    QColor startColor, endColor;
+    bool fadeOut;
+    int currentAlpha;
+    int duration;
+};
+
+#endif