+ void mousePressEvent(QMouseEvent *event) override;
+
+signals:
+ void clicked();
+ void transition_names_updated(std::vector<std::string> transition_names);
+ void resolution_updated(Mixer::Output output);
+ void color_updated(Mixer::Output output);
+
+private slots:
+ void show_context_menu(unsigned signal_num, const QPoint &pos);