inline const Widget *parent(void) const { return _parent; }
inline const WidgetList &children(void) const { return _children; }
inline unsigned int screen(void) const { return _screen; }
inline const Widget *parent(void) const { return _parent; }
inline const WidgetList &children(void) const { return _children; }
inline unsigned int screen(void) const { return _screen; }