--- /dev/null
+#ifndef GRAPH_OBSERVER_I_H_\r
+#define GRAPH_OBSERVER_I_H_\r
+\r
+#include "envGraph.h"\r
+#include "Figure.h"\r
+\r
+/*----------------------------------------------------------------------*\\r
+ |* Declaration *|\r
+ \*---------------------------------------------------------------------*/\r
+\r
+/*--------------------------------------*\\r
+ |* Public *|\r
+ \*-------------------------------------*/\r
+\r
+class CBI_GRAPH GraphObserver_I\r
+ {\r
+ public:\r
+\r
+ /*--------------------------------------*\\r
+ |* Destructor *|\r
+ \*-------------------------------------*/\r
+\r
+ virtual ~GraphObserver_I()\r
+ {\r
+ }\r
+\r
+ /*--------------------------------------*\\r
+ |* Methodes *|\r
+ \*-------------------------------------*/\r
+\r
+ public:\r
+\r
+ virtual void onFigureAdd(Figure* ptrFigure)=0;\r
+\r
+ virtual void onFigureRemove(Figure* ptrFigure)=0;\r
+\r
+ virtual void update()=0;\r
+\r
+ };\r
+\r
+#endif \r
+\r
+/*----------------------------------------------------------------------*\\r
+ |* End *|\r
+ \*---------------------------------------------------------------------*/\r