Swapping back from fullscreen moves the window up/left (win32, pyglet 2.1)

[einarf]

This is new in 2.1. I can't reproduce it in 2.0.15.

If you toggle fullscreen and window mode repeatedly the window keeps moving slightly up and to the left. If you keep toggling the window can move outside the desktop area. The step it moves is likely equal to the size of the top bar of the window (and the left window border).

Quick example. Just press F a few times and see how the window moves. I don't know if this is an issue on multiple platforms.

import pyglet

window = pyglet.window.Window()
label = pyglet.text.Label('Hello, world!',
                          font_size=36,
                          x=window.width // 2,
                          y=window.height // 2,
                          anchor_x='center',
                          anchor_y='center')

@window.event
def on_draw():
    window.clear()
    label.draw()

@window.event
def on_key_press(symbol, modifiers):
    if symbol == pyglet.window.key.F:
        window.set_fullscreen(not window.fullscreen)

pyglet.app.run()

[pushfoo]

Wayland + GNOME on Linux appears unaffected.

[benmoran56]

Strange one. I was able to replicate it with both pyglet 2.0.15, and 2.1, under Wayland and Xorg.

Gnome 46, pyglet 2.0.15, Xorg: replicated
Gnome 46, pyglet 2.0.15, Wayland: replicated
Gnome 46, pyglet 2.1, Xorg: replicated
Gnome 46, pyglet 2.1, Wayland: replicated

Assuming that this behavior did not occur in the past, I suspect that it might be an Xorg/Xwayland issue.
My system has xorg-server 21.1.13. @pushfoo are you running an older version by chance?

[pushfoo]

Gnome 3.38.5, but I don't have an xorg-server package. Here's a gist of dpkg -l | grep xorg-server.

[benmoran56]

OK, so it doesn't occur in Xorg 1.17.

Also to note that on Gnome 46, the window never moves outside of the desktop area. It's also only being repositioned a few pixels up-left, and is more than the window border but less than the window title bar. That doesn't seem related.