javafx.scene.control.Dialog won't close on pressing “x”

Question

If I just create an empty class extending from javafx.scene.control.Dialog, it won\'t close when I\'m pressing the \"x\" button in the top right corner

Answer 1

To work-around this, you could add a hidden close button to the dialog.

import javafx.application.Application;
import javafx.scene.*;
import javafx.scene.control.*;
import javafx.stage.Stage;

public class DialogClosure extends Application{

    @Override
    public void start(Stage stage) throws Exception {
        Button openDialog = new Button("Open Dialog");
        openDialog.setOnAction(event -> {
            Dialog dialog = new Dialog();
            dialog.getDialogPane().getButtonTypes().add(ButtonType.CLOSE);
            Node closeButton = dialog.getDialogPane().lookupButton(ButtonType.CLOSE);
            closeButton.managedProperty().bind(closeButton.visibleProperty());
            closeButton.setVisible(false);
            dialog.showAndWait();
        });

        stage.setScene(new Scene(openDialog));
        stage.show();
    }
    public static void main(String[] args) {
        launch(args);
    }
}

Then the dialog meets both your requirement of being able to be closed via the native windowing system's window close icon as well as the JavaFX Dialog requirement of including a close button in the dialog for the close icon to work.

Alternately, you could use a Stage with showAndWait instead of a Dialog. A Stage without any included buttons is closable using the windowing system's close window icon.