PrefWidth/Height calculations only works if stage is shown

[Tom Schindl]

Hi,

I've been trying to open a window in the minimal dimension needed by
components but it looks like size calculations prefHeight/prefWidth only
works if the stage is shown.

I need the dimensions before showing the stage because I want to
position it on the lower right of the screen before showing the stage
because if doing it afterwards leads to flickering.


> BorderPane g = new BorderPane();
> TableView<String> v = new TableView<String>();
> g.setCenter(v);
> Scene s = new Scene(g);
> primaryStage.setScene(s);
> System.err.println(g.prefWidth(-1)); // 0
> primaryStage.show();
> System.err.println(g.prefWidth(-1)); // 248

Is this working as designed?

Tom