add swipe gesture

src/mainwindow.h

@@ -13,6 +13,8 @@ namespace Ui {
 }
 class GUIMessageDialog;
 class QTabWidget;
+class QGestureEvent;
+class QSwipeGesture;
 
 
 class MainWindow : public QMainWindow
@@ -28,13 +30,17 @@ public:
 	void requestLogin();
 	QTextEdit* getEdit();
 	void debugConsoleOn();
-	public slots:
-    void triggerError(const QString&);
+
+	void grabGestures(const QList<Qt::GestureType>& gestures);
+public slots:
+	void triggerError(const QString&);
 protected:
 	void changeEvent(QEvent* event);
-
+	bool event(QEvent* event) override;
 
 private:
+	bool gestureEvent(QGestureEvent* event);
+	void swipeTriggered(QSwipeGesture*);
 	void loadStyleSheet(const QString& sheetName);
 	cJSON* json_root = nullptr;