Ugly flashing when opening a css-styled stage

[Jeff Martin]

I haven't seen this, but here's a hack you can try:

	// Show stage transparent once to get proper drawing
	_stage.setOpacity(0); _stage.show(); _stage.hide(); _stage.setOpacity(1);

I've done this before to trigger Stage to set it's width/height property (which I needed to position the stage property).

jeff


On Jun 1, 2014, at 3:18 AM, Robert Krüger <krueger at lesspain.de> wrote:

> Hi,
> 
> I'm in the process of evaluating Java FX 8 for our currently
> Swing-based product (also Java 8) on OSX.
> 
> My first attempt to style a stage's background resulted in an ugly
> flashing effect which I would classify as a show-stopper for
> delivering a commercial product. This looks like it is caused by the
> stage being drawn at least once before the style has been applied, and
> I am wondering what the mistake is since my code is more or less a
> straight-forward hello world:
> 
> package jfxtest;
> 
> import javafx.application.Application;
> import javafx.scene.Scene;
> import javafx.scene.control.Button;
> import javafx.scene.layout.StackPane;
> import javafx.stage.Stage;
> 
> public class JXTest extends Application {
> 
>    @Override
>    public void start(Stage primaryStage) throws Exception {
>        final StackPane pane = new StackPane();
>        final Button closeButton = new Button("Close");
>        closeButton.setOnAction(event -> primaryStage.close());
>        pane.getChildren().add(closeButton);
>        final Scene scene = new Scene(pane, 800, 600);
>        scene.getStylesheets().add("dark.css");
>        scene.getStylesheets();
>        primaryStage.setScene(scene);
>        primaryStage.setTitle(getClass().getSimpleName());
>        primaryStage.show();
>    }
> 
>    public static void main(String[] args) {
>        launch(args);
>    }
> }
> 
> with dark.css being:
> 
> .root {
>          -fx-background: rgb(54, 54, 54);
> }
> 
> Is this a Mac-specific problem? Is there a workaround? Which of the
> two mailing lists is the more appropriate one to post these things
> (JFX problems which look like they might be platform-specific) to?
> 
> Thanks,
> 
> Robert