I have a question regarding JavaFX buttons. I have a set 4 buttons on my scene. The first three buttons are labelled "Home", "Account", "Map". The last button is called "Go".

I am using button.setOnAction(new EventHandler<ActionEvent>(){ })

for each button to control the event it will trigger. My issue is that I want to click on one of the first three buttons (account, home, map) , but not action that event until the "go" button has been clicked.

For example, I click on home, the button changes colour to show it has been clicked. I press go, and the action associated with the home button will be actioned. How do I do something like this?

Another question i had is how do I ensure only one of the first three buttons (Home, Account, and Map, is clicked at a time. If I had first clicked "Home", then "Map" then "Go" I want to action the Map event, so home would be released when map is pressed.

I appreciate any help :)

CodePudding user response：

As noticed in the comments you can use ToggleButton (or RadioButton) for "Home", "Account" and "Map", and add them to a ToggleGroup:

public class App extends Application {

    @Override
    public void start(Stage stage) {

        ToggleButton buttonHome = new ToggleButton("Home");
        ToggleButton buttonAccount = new ToggleButton("Account");
        ToggleButton buttonMap = new ToggleButton("Map");
    
        ToggleGroup group = new ToggleGroup();
    
        group.getToggles().addAll(buttonHome, buttonAccount, buttonMap);
    
        Button buttonGo = new Button("Go");

        // Disable button "Go" when no other button is selected (remove this line if not needed)
        buttonGo.disableProperty()
                    .bind(group.selectedToggleProperty().isNull());
    
        buttonGo.setOnAction(e -> {
            ToggleButton selected = (ToggleButton)group.getSelectedToggle();
            if (selected != null) {
                System.out.println(selected.getText());
            }
        });
    
        HBox buttons = new HBox(5, buttonHome, buttonAccount, buttonMap);
    
        VBox pane = new VBox(10, buttons, buttonGo);
        pane.setAlignment(Pos.CENTER_RIGHT);

        Scene scene = new Scene(pane);

        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        launch();
    }

}

Output:

If you replace all ToggleButton with RadioButton: