White box / window flicker upon launch

[Dirk Lemmermann]

I think this is a bug … I will create a ticket for it. When this behaviour was fixed for Swing in Java 6 it made a huge difference in the perception of the quality and performance of Java applications. Could do the same for JavaFX.

Dirk


> On 22 Apr 2020, at 20:17, Tom Schindl <tom.schindl at bestsolution.at> wrote:
> 
> yes I do but I think this is by nature:
> 
> a) you use CSS so only after the first CSS-Pass the color could be set
>   appropriately, this CSS pass could happen after the Native-Window is
>   shown
>   => you can mitigate that a bit using
>   root.setBackground(new Background(new BackgroundFill(Color.ORANGE,
>      CornerRadii.EMPTY, Insets.EMPTY)));
> 
> b) if the above gives you short flash (IMHO shorter than with CSS) and
>   you can see that by setting eg RED or GREEN as the Scene-Fill so then
>   it gets more prominent
> 
> So the flash is gone if you put the same color to Scene.setFill() as your root-Pane but now something slightly unexpected happens. The trim is colored slighly in your scene-color ;-)
> 
> Tom
> 
> Am 22.04.20 um 19:46 schrieb Dirk Lemmermann:
>> import javafx.application.Application;
>> import javafx.scene.Scene;
>> import javafx.scene.layout.VBox;
>> import javafx.stage.Stage;
>> public class BugDemo extends Application {
>>     public void start(Stage stage) {
>>         VBox root = new VBox();
>>         root.setStyle("-fx-background-color: orange;");
>>         Scene scene = new Scene(root, 1000, 800);
>>         stage.setScene(scene);
>>         stage.show();
>>     }
>>     public static void main(String[] args) {
>>         launch(args);
>>     }
>> }