Resizing to fill the window.

Question

I would like my application resize to fill the available canvas, but am unable to figure out to make my StackPane expand to fill the space. My latest attempt is using binding, but I am getting a "A bound value cannot be set." exception on what I figured was a fairly basic usage of the facility:
<pre>
public class Test extends Application{
private StackPane rootGroup = new StackPane();
public static void main(String[] args) {
Application.launch(Test.class, args);
@Override
public void start(Stage primaryStage) {
Scene scene = new Scene(rootGroup, 350, 250);
rootGroup.widthProperty().bind(scene.widthProperty());
primaryStage.setScene(scene);
primaryStage.setVisible(true);
</pre>
At least, back in the 1.3 days, binding my container's height/width to the scene's height/width is how I accomplished this. How do I accomplish this with 2.0?
Edited by: JimSmyth on Sep 27, 2011 1:47 PM

Answer 1

Hi. There are some differences between javafx script binding and javafx2.0 binding.
Javafx Script Bind:
btn.layoutX = bind scene.width /2Javafx2.0 Bind:
btn.layoutXProperty().bind(scene.widthProperty().divide(2.0));In your case you are trying to bind StackPane’s width property which is defined as read only.
Here is a javafx2.0 binding example:
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.scene.shape.Rectangle;
public class TestBind extends Application {
    public static void main(String[] args) {
        Application.launch(TestBind.class, args);
    @Override
    public void start(Stage primaryStage) {
         Group root = new Group();
        Scene scene = new Scene(root, 300, 250, Color.LIGHTGREEN);
        Button btn = new Button();
        btn.layoutXProperty().bind(scene.widthProperty().divide(2));
        btn.layoutYProperty().bind(scene.heightProperty().divide(2));
        primaryStage.setTitle("Hello World");
        btn.setText("Hello World");
        btn.setOnAction(new EventHandler<ActionEvent>() {
            public void handle(ActionEvent event) {
                System.out.println("Hello World");
        root.getChildren().add(btn);
        primaryStage.setScene(scene);
        primaryStage.show();
}