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diff --git a/src/k3bwidgetshoweffect.h b/src/k3bwidgetshoweffect.h
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+/* 
+ *
+ * $Id: sourceheader 380067 2005-01-19 13:03:46Z trueg $
+ * Copyright (C) 2005 Sebastian Trueg <[email protected]>
+ *
+ * This file is part of the K3b project.
+ * Copyright (C) 1998-2007 Sebastian Trueg <[email protected]>
+ *
+ * Based on the effects in popupMessage.cpp 
+ * Copyright (C) 2005 by Max Howell <[email protected]>
+ *               2005 by Seb Ruiz <[email protected]>
+ *
+ * Dissolve Mask (c) Kicker Authors kickertip.cpp, 2005/08/17
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ * See the file "COPYING" for the exact licensing terms.
+ */
+
+#ifndef _K3B_WIDGET_SHOW_EFFECT_H_
+#define _K3B_WIDGET_SHOW_EFFECT_H_
+
+#include <qobject.h>
+#include <qbitmap.h>
+
+
+/**
+ * Helper class to show and hide a widget in a fancy way.
+ */
+class K3bWidgetShowEffect : public QObject
+{
+  Q_OBJECT
+
+ public:
+  // FIXME: add an effect direction
+  enum Effect {
+    Dissolve = 1,
+    Slide
+  };
+
+  K3bWidgetShowEffect( QWidget* widget, Effect e = Slide );
+  ~K3bWidgetShowEffect();
+
+  void setEffect( Effect e ) { m_effect = e; }
+
+  /**
+   * Using the widget effects the easy way.
+   * \returns the K3bWidgetShowEffect instance used to show the widget.
+   * Can be used to connect to signals.
+   */
+  static K3bWidgetShowEffect* showWidget( QWidget* w, Effect );
+
+  /**
+   * Using the widget effects the easy way.
+   * \returns the K3bWidgetShowEffect instance used to hide the widget.
+   * Can be used to connect to signals.
+   */
+  static K3bWidgetShowEffect* hideWidget( QWidget* w, Effect );
+
+ signals:
+  void widgetShown( QWidget* );
+  void widgetHidden( QWidget* );
+
+ public slots:
+  /**
+   * \param effectOnly If true K3bWidgetShowEffect will not call QWidget::show().
+   *                   This is only useful in case onw uses K3bWidgetShowEffect
+   *                   to reimplement QWidget::show(). In that case the caller
+   *                   has to take care of showing the widget.
+   */
+  void show( bool effectOnly = false );
+
+  /**
+   * \param effectOnly If true K3bWidgetShowEffect will not call QWidget::hide().
+   *                   This is only useful in case onw uses K3bWidgetShowEffect
+   *                   to reimplement QWidget::hide(). In that case the caller
+   *                   has to take care of hiding the widget by connecting to
+   *                   K3bWidgetShowEffect::widgetHidden()
+   */
+  void hide( bool effectOnly = false );
+
+ private:
+  void timerEvent( QTimerEvent* );
+  
+  /**
+   * @short Gradually show widget by dissolving from background
+   */
+  void dissolveMask();
+  
+  /**
+   * @short animation to slide the widget into view
+   */
+  void slideMask();
+
+  Effect m_effect;
+  QWidget* m_widget;
+
+  QBitmap m_mask;
+
+  int m_dissolveSize;
+  int m_dissolveDelta;
+
+  int m_offset;
+  int m_timerId;
+
+  // if true we show, otherwise we hide the widget
+  bool m_bShow;
+
+  bool m_deleteSelf;
+  bool m_bEffectOnly;
+};
+
+#endif