How to make javafx.scene.Scene resize while maintaining an aspect ratio?

Question

I\'m writing an application with JavaFX 2.2.7-b01.

Here is an example of the code I currently have. How can I allow the application window to be resized but maintain

Answer 1

> How to make javafx.scene.Scene resize while maintaining an aspect ratio?

By manipulating the stage size instead of scene:

@Override
public void start(Stage primaryStage) {
    Button btn = new Button();
    btn.setText("Play by resizing the window");
    VBox root = new VBox();
    root.getChildren().add(btn);
    root.setStyle("-fx-background-color: gray");

    Scene scene = new Scene(root);
    primaryStage.setScene(scene);
    primaryStage.minWidthProperty().bind(scene.heightProperty().multiply(2));
    primaryStage.minHeightProperty().bind(scene.widthProperty().divide(2));
    primaryStage.show();
}