On Fri, 6 Nov 2026 13:55:28 GMT, Lukasz Kostyra <[email protected]> wrote:
> Got another question to the implementation, and also when testing the change
> I found one problem which is a discrepancy in behavior in Linux, attached a
> reproducer to it.
>
> In short, when a Stage has called `setResizable(false)` and then we request
> it to maximize or fullscren by `setMaximize(true)`/`setFullScreen(true)` the
> latter request is ignored on Linux. This doesn't happen on Windows. I think
> `setResizable` was just supposed to block UI-based resizing, but
> programmatically resizing the Stage should still work.
>
> For the record, I'm pretty sure this behaved like this also before your
> changes, but I figured I'd mention it. I think it's a problem somewhere in
> `glass_window.cpp` in `process_map` with window constraints, but I didn't dig
> too deep into it.
>
> Reproducer:
>
> ```
> import javafx.application.Application;
> import javafx.application.Platform;
> import javafx.scene.Group;
> import javafx.scene.Scene;
> import javafx.stage.Stage;
>
> public class NonResizableMaximizeBug extends Application {
> @Override
> public void start(Stage stage) {
> stage.setScene(new Scene(new Group()));
> stage.setTitle("FixedSizeMaximizeBug");
>
> stage.setWidth(640);
> stage.setHeight(480);
> stage.setResizable(false);
> stage.setMaximized(true);
>
> stage.show();
> }
>
> public static void main(String[] args) {
> launch(args);
> }
> }
> ```
I noticed this as well. I would classify it as a minor behavioral difference
between platforms.
I worked around it by allowing programmatic resizing even when the window is
marked as non-resizable. At least on Mutter/GNOME, the default behavior is to
discard resize requests when the window is not resizable.
However, allowing a non-resizable window to be maximized doesn't seem right.
On Windows, you can resize a maximized window, and it will remain maximized
while accepting the resize request. On Linux (Mutter/GNOME), if I remember
correctly, requesting a resize will unmaximize the window to apply the resize.
Another minor behavioral difference between platforms in my opinion.
-------------
PR Comment: https://git.openjdk.org/jfx/pull/2139#issuecomment-6687236650
