Added support for left mouse click

JGE/include/JGui.h

@@ -54,6 +54,9 @@ class JGuiObject
   virtual bool Leaving(JButton key);		// when focus is transferring away from this obj, true to go ahead
   virtual bool ButtonPressed();		// action button pressed, return false to ignore
 
+  // Used for mouse support so that the GUI engine can found out which Object was selected
+  virtual bool getTopLeft(int& top, int& left) {return false;};
+
   int GetId();
 };