signals for when the view is about to adjust its scene rect in response to the containment changing so that geometry changes made in view subclasses can be properly coordinated

svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=782388

view.cpp

@@ -160,7 +160,10 @@ bool View::drawWallpaper() const
 
 void View::updateSceneRect()
 {
+    //kDebug( )<< "!!!!!!!!!!!!!!!!! setting the scene rect to" << d->containment->sceneBoundingRect();
+    emit sceneRectAboutToChange();
     setSceneRect(d->containment->sceneBoundingRect());
+    emit sceneRectChanged();
 }
 
 } // namespace Plasma

view.h

@@ -102,6 +102,27 @@ public:
      */
     Containment* containment() const;
 
+Q_SIGNALS:
+    /**
+     * This signal is emitted whenever the containment being viewed has
+     * changed its geometry, but before the View has shifted the viewd scene rect
+     * to the new geometry. This is useful for Views which want to keep
+     * their rect() in sync with the containment'sa
+     *
+     * @arg rect the new scene rect.
+     */
+    void sceneRectAboutToChange();
+
+    /**
+     * This signal is emitted whenever the containment being viewed has
+     * changed its geometry, and after the View has shifted the viewd scene rect
+     * to the new geometry. This is useful for Views which want to keep
+     * their rect() in sync with the containment's.
+     *
+     * @arg rect the new scene rect.
+     */
+    void sceneRectChanged();
+
 protected Q_SLOTS:
     void updateSceneRect();