JavaFX Stage.close() not calling my onCloseRequest() handler - javafx

Question

Please refer to the JavaFX SSCCE below. The print statement appears when closing the primary stage from the window's default titlebar "X" button. The print statement does NOT appear when clicking the "Close" button. Why isn't my onCloseHandler being called when I call close() on the stage? Is my expectation somehow unreasonable or is this (yet another) bug in JavaFX? Thanks!
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
Button closeButton = new Button("Close");
closeButton.setOnAction(e -> {
primaryStage.close();
});
primaryStage.setOnCloseRequest(e -> {
System.out.println("onCloseRequest handler called!");
});
StackPane rootPane = new StackPane();
rootPane.getChildren().add(closeButton);
primaryStage.setScene(new Scene(rootPane, 300, 250));
primaryStage.show();
}
}

Answer 1

As described by the Javadoc, this is only fired on external requests:
Called when there is an external request to close this Window.
Maybe setOnHidden would work for you, it is called in both cases.
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
Button closeButton = new Button("Close");
closeButton.setOnAction(e -> {
primaryStage.close();
});
primaryStage.setOnHidden(e -> {
System.out.println("stage hidden");
});
StackPane rootPane = new StackPane();
rootPane.getChildren().add(closeButton);
primaryStage.setScene(new Scene(rootPane, 300, 250));
primaryStage.show();
}
}