diff -r dee5afe5301f -r 3f74d0d4af4c demos/composition/composition.h
--- a/demos/composition/composition.h	Mon Mar 15 12:43:09 2010 +0200
+++ b/demos/composition/composition.h	Thu Apr 08 14:19:33 2010 +0300
@@ -109,10 +109,6 @@
 
     void paint(QPainter *);
 
-    void mousePressEvent(QMouseEvent *);
-    void mouseMoveEvent(QMouseEvent *);
-    void mouseReleaseEvent(QMouseEvent *);
-
     void setCirclePos(const QPointF &pos);
 
     QSize sizeHint() const { return QSize(500, 400); }
@@ -121,6 +117,12 @@
     int circleColor() const { return m_circle_hue; }
     int circleAlpha() const { return m_circle_alpha; }
 
+protected:
+    void mousePressEvent(QMouseEvent *);
+    void mouseMoveEvent(QMouseEvent *);
+    void mouseReleaseEvent(QMouseEvent *);
+    void timerEvent(QTimerEvent *);
+
 public slots:
     void setClearMode() { m_composition_mode = QPainter::CompositionMode_Clear; update(); }
     void setSourceMode() { m_composition_mode = QPainter::CompositionMode_Source; update(); }
@@ -150,7 +152,7 @@
 
     void setCircleAlpha(int alpha) { m_circle_alpha = alpha; update(); }
     void setCircleColor(int hue) { m_circle_hue = hue; update(); }
-    void setAnimationEnabled(bool enabled) { m_animation_enabled = enabled; update(); }
+    void setAnimationEnabled(bool enabled);
 
 private:
     void updateCirclePos();
@@ -177,6 +179,7 @@
 
     ObjectType m_current_object;
     bool m_animation_enabled;
+    int m_animationTimer;
 
 #ifdef QT_OPENGL_SUPPORT
     QGLPixelBuffer *m_pbuffer;