The Stage seems not to respect the minimum sizes from its content.

If the following example, the Stage does not respect the minimum size set on the StackPane:


public class TestMinSize extends Application {

    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button();
        btn.setText("Say 'Hello World'");

        StackPane root = new StackPane();

        // set minimum size
        root.setMinWidth(200);
        root.setMinHeight(200);

        root.getChildren().add(btn);

        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);

        primaryStage.show();
    }
}


The only way to "simulate" this was to use bindings such as:

        primaryStage.minHeightProperty().bind(((Pane)scene.getRoot()).minHeightProperty());
        primaryStage.minWidthProperty().bind(((Pane)scene.getRoot()).minWidthProperty());
(code is incomplete since do not take into account Stage's decoration)

I think the Stage should inherits its minimum size from its content such as the preferred size.