JavaFX stage.setOnCloseRequest without function? - javafx

Question

This is my Start-Methode. First i create a stage and set a title and a scene. And i wanna create a dialog if someone wants to close the window on the window-close-btn [X]. i thought i will catch this event with the setOnCloseRequest()-function. But i still can close all stages i open while runtime.
#Override
public void start(final Stage primaryStage) throws Exception {
primaryStage.setTitle("NetControl");
primaryStage.setScene(
createScene(loadMainPane())
);
primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>() {
#Override
public void handle(final WindowEvent event) {
//Stage init
final Stage dialog = new Stage();
dialog.initModality(Modality.APPLICATION_MODAL);
// Frage - Label
Label label = new Label("Do you really want to quit?");
// Antwort-Button JA
Button okBtn = new Button("Yes");
okBtn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
dialog.close();
}
});
// Antwort-Button NEIN
Button cancelBtn = new Button("No");
cancelBtn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
primaryStage.show();
dialog.close();
}
});
}
});
primaryStage.show();
}
private Pane loadMainPane() throws IOException {
FXMLLoader loader = new FXMLLoader();
Pane mainPane = (Pane) loader.load(
getClass().getResourceAsStream(ContentManager.DEFAULT_SCREEN_FXML)
);
MainController mainController = loader.getController();
ContentManager.setCurrentController(mainController);
ContentManager.loadContent(ContentManager.START_SCREEN_FXML);
return mainPane;
}
private Scene createScene(Pane mainPane) {
Scene scene = new Scene(mainPane);
setUserAgentStylesheet(STYLESHEET_MODENA);
return scene;
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
Application.launch(args);
}
Are there any other functions to catch the window-events?
or isnt it logical to run the CloseRequest on the primaryStage, i read something with platforms (but i dont know if it necessary for my problem)?

Answer 1

In the onCloseRequest handler, call event.consume();.
That will prevent the primary stage from closing.
Remove the primaryStage.show(); call from the cancel button's handler and add a call to primaryStage.hide(); in the OK button's handler.