virtual void buttonPressHandler(const XButtonEvent &e);
virtual void buttonReleaseHandler(const XButtonEvent &e);
virtual void buttonPressHandler(const XButtonEvent &e);
virtual void buttonReleaseHandler(const XButtonEvent &e);
virtual void unmapHandler(const XUnmapEvent &e);
virtual void destroyHandler(const XDestroyWindowEvent &e);
virtual void unmapHandler(const XUnmapEvent &e);
virtual void destroyHandler(const XDestroyWindowEvent &e);