+ /**
+ * Handles left mouse button press events.
+ * @param event the mouse event that triggered this handler.
+ */
+ void mouse_left_press_event(QMouseEvent *event);
+
+ /**
+ * Handles left mouse button release events.
+ * @param event the mouse event that triggered this handler.
+ */
+ void mouse_left_release_event(QMouseEvent *event);
+
+protected:
+ void mousePressEvent(QMouseEvent * event);
+ void mouseReleaseEvent(QMouseEvent *event);
+
+ void leaveEvent(QEvent *event);
+
+ virtual void contextMenuEvent(QContextMenuEvent *event);
+
+ virtual void keyPressEvent(QKeyEvent *e);
+