- virtual void pointer_enter() { }
- virtual void pointer_leave() { }
- virtual void key_press(unsigned, unsigned, wchar_t) { }
+ virtual void pointer_enter();
+ virtual void pointer_leave();
+ virtual void touch_press(int, int, unsigned);
+ virtual void touch_release(int, int, unsigned);
+ virtual void touch_motion(int, int, unsigned);
+ virtual void key_press(unsigned, unsigned) { }