- void render_part(const Part &) const;
- void on_button_press(int, int, unsigned);
- void on_button_release(int, int, unsigned);
- void pointer_motion(int, int);
+ virtual const char *get_class() const { return "hslider"; }
+ virtual void render_special(const Part &) const;
+
+ virtual void on_geometry_change();
+ virtual void on_style_change();