Resizing stage while it is maximized breaks scene size on Linux

[Thiago Milczarek Sayão]

@Christopher Schnick <crschnick at xpipe.io>

Hi, did you open a bug? I have a fix for this.

Thanks

-- Thiago.

Em seg., 17 de mar. de 2025 às 09:49, Christopher Schnick <
crschnick at xpipe.io> escreveu:

> So on Windows at least, it will change the width temporarily and then
> revert back to the original width value. So you will receive two width
> change events if you listen to the stage width property. The maximized
> property is not changed.
>
> I guess this also not optimal handling of this. Ideally, no changes would
> be made in that case.
> On 17/03/2025 10:53, Thiago Milczarek Sayão wrote:
>
> Hi Christopher,
>
> It seems like a simple fix.
>
> How does it behave on other platforms? Does it ignore the resize, restore
> the window to its unmaximized state before resizing, or keep it maximized
> while adjusting the unmaximized size.
>
> -- Thiago
>
>
>
>
>
>
> Em dom., 16 de mar. de 2025 às 05:25, Christopher Schnick <
> crschnick at xpipe.io> escreveu:
>
>> Hello,
>>
>> we encountered an issue on Linux where resizing the stage while it is
>> maximized breaks the size of the scene. You can see a video of this at
>> https://github.com/xpipe-io/xpipe/issues/485 . The root cause is that
>> the stage size is modified.
>>
>> When doing this, it temporarily or permanently switches to the size the
>> stage had prior to being maximized, leading to either a flicker or a
>> permanently broken scene that has the wrong size. This happens on Gnome and
>> KDE for me with the latest JavaFX ea version.
>>
>> Here is a simple reproducer:
>>
>> import javafx.application.Application;import javafx.scene.Scene;import javafx.scene.control.Button;import javafx.scene.layout.Region;import javafx.scene.layout.StackPane;import javafx.stage.Stage;
>> import java.io.IOException;import java.util.Base64;
>> public class MaximizeLinuxBug extends Application {
>>
>>     @Override    public void start(Stage stage) throws IOException {
>>         Scene scene = new Scene(createContent(), 640, 480);
>>         var s = "data:text/css;base64," + Base64.getEncoder().encodeToString(createCss().getBytes());
>>         scene.getStylesheets().add(s);
>>         stage.setTitle("Hello!");
>>         stage.setScene(scene);
>>         stage.show();
>>         stage.centerOnScreen();
>>         stage.setMaximized(true);
>>     }
>>
>>     private String createCss() {
>>         return """                * {                -fx-border-color: red;                -fx-border-width: 1;                }                """;
>>     }
>>
>>     private Region createContent() {
>>         var button = new Button("Click me!");
>>         button.setOnAction(event -> {
>>             var w = button.getScene().getWindow();
>>             w.setWidth(w.getWidth() - 1);
>>             event.consume();
>>         });
>>         var stack = new StackPane(button);
>>         return stack;
>>     }
>>
>>     public static void main(String[] args) {
>>         launch();
>>     }
>> }
>>
>>
>> Best
>> Christopher Schnick
>>
>
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