bug fixes

src/mainwindow.h

@@ -15,6 +15,7 @@ class GUIMessageDialog;
 class QTabWidget;
 class QGestureEvent;
 class QSwipeGesture;
+class QPanGesture;
 class QDockWidget;
 
 class MainWindow : public QMainWindow
@@ -41,6 +42,7 @@ protected:
 private:
 	bool gestureEvent(QGestureEvent* event);
 	void swipeTriggered(QSwipeGesture*);
+	void panTriggered(QPanGesture*);
 	void loadStyleSheet(const QString& sheetName);
 	cJSON* json_root = nullptr;