add of save function with default value

mainwindow.h

@@ -25,6 +25,7 @@ public:
     void addNewPath();
     void addNewStep();
     void exportHTMLMap();
+    void saveFile();
 
 private slots:
     void on_pushButton_clicked();
@@ -33,6 +34,8 @@ private slots:
 
     void on_toolButton_clicked();
 
+    void on_actionSave_triggered();
+
 private:
     Ui::MainWindow *ui;
     QString currentFile;