+public:
+ virtual void init_context_bar_actions(QWidget *parent) = 0;
+
+ virtual const std::list<QAction*> get_context_bar_actions() = 0;
+
+ virtual QMenu* create_context_menu(QWidget *parent);
+
+protected:
+ static QPen highlight_pen();
+
+protected:
+ QWidget *_context_parent;
+