https://bugs.kde.org/show_bug.cgi?id=445741
Jin Liu <ad.liu....@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|general |core
Version|5.88.0 |git master
Platform|Neon Packages |Archlinux Packages
Product|frameworks-kconfigwidgets |kwin
Assignee|kdelibs-b...@kde.org |kwin-bugs-n...@kde.org
--- Comment #2 from Jin Liu <ad.liu....@gmail.com> ---
I did some debugging and found this is indeed a kwin bug. But I don't know kwin
enough to fix it though.
The bug happens when X11, 250% zoom, screen size is not multiply of 3, and
KDE/Qt apps only.
The code is kwin/x11window.cpp: X11Window::isFullScreenable :
> if (rules()->checkStrictGeometry(true)) {
I don't know why but seems all KDE apps require strict geometry, while other
apps don't. So only KDE apps pass the above check.
> // check geometry constraints (rule to obey is set)
> const QRect fullScreenArea = workspace()->clientArea(FullScreenArea,
> this);
In my computer fullScreenArea is (3200,2000)
> const QSize constrainedClientSize =
> constrainClientSize(fullScreenArea.size());
While constrainedClientSize is (3198, 1998). I.e. rounded to multiply of 3.
That 3 comes from WM_SIZE_HINTS which specified resize increment = 3. I didn't
track where that size hint come from, but again only KDE apps get that resize
increment hint.
> if (rules()->checkSize(constrainedClientSize) !=
> fullScreenArea.size()) {
So this check fails for all KDE apps in this particular screen size and zoom
combo.
> return false; // the app wouldn't fit exactly fullscreen geometry
> due to its strict geometry requirements
> }
> }
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