fix weird behavior when zooming at the same time of création of shape item

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@4251 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/diagramevent/diagrameventinterface.h

@@ -18,6 +18,8 @@
 #ifndef DIAGRAMEVENTINTERFACE_H
 #define DIAGRAMEVENTINTERFACE_H
 
+#include <QObject>
+
 class QGraphicsSceneMouseEvent;
 class QGraphicsSceneWheelEvent;
 class QKeyEvent;
@@ -45,8 +47,10 @@ class Diagram;
  * the bool m_abort is here for that at destruction time.
  *
  */
-class DiagramEventInterface
+class DiagramEventInterface : public QObject
 {
+		Q_OBJECT
+
 	public:
 		DiagramEventInterface(Diagram *diagram);
 		virtual ~DiagramEventInterface() = 0;
@@ -61,6 +65,9 @@ class DiagramEventInterface
 		virtual bool isFinish  () const;
 		virtual void init();
 
+	signals:
+		void finish(); //Emited when the interface finish is job.
+
 	protected:
 		Diagram *m_diagram;
 		bool m_running;