add suport for XMotionEvents

otk/eventhandler.cc

@@ -30,6 +30,8 @@ void OtkEventHandler::handle(const XEvent &e)
     return buttonPressHandler(e.xbutton);
   case ButtonRelease:
     return buttonReleaseHandler(e.xbutton);
+  case MotionNotify:
+    return motionHandler(e.xmotion);
   case EnterNotify:
     return enterHandler(e.xcrossing);
   case LeaveNotify:

otk/eventhandler.hh

@@ -28,6 +28,9 @@ public:
   //! Called whenever a button of the pointer is released.
   virtual void buttonReleaseHandler(const XButtonEvent &) {}
 
+  //! Called whenever the pointer moved
+  virtual void motionHandler(const XMotionEvent &) {}
+
   //! Called whenever the pointer enters a window.
   virtual void enterHandler(const XCrossingEvent &) {}