JavaFX, show canvas on second scree, works well on Windows but not on Linux

[Davide Perini]

The strange things is that it works perfectly on Windows but not on Linux.
Is this a JavaFX bug?

I tried to format code better to make it more readable...

Stage stage = new Stage();
         Group root = new Group();
         Scene s = new Scene(root, 1920, 1080, Color.BLACK);
         GraphicsContext gc;
         Canvas canvas = new Canvas(1920,1080);
         gc = canvas.getGraphicsContext2D();
         canvas.setFocusTraversable(true);
         // Hide canvas on key pressed
         canvas.setOnKeyPressed(t -> {
             stage.setFullScreen(false);
             stage.hide();
         });
         drawThings(gc);
         root.getChildren().add(canvas);
         stage.setScene(s);
         // Show canvas on the correct display number
         Rectangle2D bounds = Screen.getScreens().get(1).getVisualBounds();
         stage.setX(bounds.getMinX());
         stage.setY(bounds.getMinY());
         stage.show();
         stage.setFullScreen(true);

Thanks
Davide


Il 14/10/2021 16:05, Davide Perini ha scritto:
> Hi all,
> I have a small piece of code that shows a canvas with JavaFX.
>
> I want to display the canvas on the second screen.
> This works well in Windows but not on Linux Ubuntu.
>
> Stage stage =new Stage(); Group root =new Group(); Scene s =new 
> Scene(root, 1920, 1080, Color.BLACK); GraphicsContext gc; Canvas 
> canvas =new Canvas(1920,1080); gc = canvas.getGraphicsContext2D(); 
> canvas.setFocusTraversable(true); // Hide canvas on key pressed 
> canvas.setOnKeyPressed(t -> {
>     stage.setFullScreen(false); stage.hide(); }); drawThings(gc); 
> root.getChildren().add(canvas); stage.setScene(s); // Show canvas on 
> the second display Rectangle2D bounds = 
> Screen.getScreens().get(1).getVisualBounds(); 
> stage.setX(bounds.getMinX()); stage.setY(bounds.getMinY()); 
> stage.show(); stage.setFullScreen(true);
>
>
>
> On Linux the canvas is shown on the first screen.
> I have tried swapping the screen index from
>
> // Show canvas on the second display Rectangle2D bounds = 
> Screen.getScreens().get(1).getVisualBounds();
>
> to
>
> // Show canvas on the second display Rectangle2D bounds = 
> Screen.getScreens().get(0).getVisualBounds();
>
> but same problem.
>
> Any idea?
>
> Thank you
> Davide
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