//akcja zamkniecia okna
            Platform.setImplicitExit(false);
            this.setOnCloseRequest(new EventHandler<WindowEvent>() {
                @Override
                public void handle(WindowEvent e) {
                    ResourceBundle rb = fxmlLoaderMain.getResources();
                    MyDialogs.Odp odpp = MyDialogs.dialogWyb(MainWindow.this, zamknijpytanie, rb);
                    if (odpp == MyDialogs.YES) {
                        rozdzielczosc(MainWindow.this.getWidth(), MainWindow.this.getHeight());
                        System.exit(0);
                    } else {
                        e.consume();
                    }
                }
            });