diff -r e099638ff236 -r b7c36be1e35c graph_displayer_canvas.h
--- a/graph_displayer_canvas.h	Fri May 27 10:34:20 2005 +0000
+++ b/graph_displayer_canvas.h	Wed Jun 01 23:30:13 2005 +0000
@@ -29,8 +29,16 @@
   ///\param mapname is the name of the map which contains the new values
   int changeText (std::string mapname);
 
-  ///Changes the dot-pro-pixel to be able to show the whole graph.
-  int rezoom();
+  ///Callback for 'ViewZoomIn' action.
+  virtual void zoomIn();
+  ///Callback for 'ViewZoomOut' action.
+  virtual void zoomOut();
+  ///Callback for 'ViewZoomFit' action.
+  virtual void zoomFit();
+  ///Callback for 'ViewZoom100' action.
+  virtual void zoom100();
+  ///Sets the scroll region of the convas to the bounding box of the graph.
+  void updateScrollRegion();
 
 protected:
 
@@ -75,7 +83,7 @@
   ///2. we would like to handle only ony item per movement, therefore quering it is not a working solution
   Gnome::Canvas::Item * active_item;
 
-
+  static const int zoom_step = 5;
 };
 
 #endif //GRAPH_DISPLAYER_CANVAS_H