https://bugs.kde.org/show_bug.cgi?id=499341
Bug ID: 499341
Summary: Task switcher select the entry at the wrong index if
the most recent used window is filtered
Classification: Plasma
Product: kwin
Version: 6.2.5
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: tabbox
Assignee: kwin-bugs-n...@kde.org
Reporter: a...@ariasuni.eu
Target Milestone: ---
SUMMARY
In the “Task Switcher” KCM, if I filter windows with “All other screens” (or
“All other desktops”) option, then when invoking the task switcher with the
shortcut, it’ll often start with the wrong index.
Usually, when using alt+tab, then the first item is the currently focused
window, and the second one is selected. However, in case where the currently
focused window is filtered, the selected item is incorrect. More precisely, the
index of the selected item is equal to the index of the first window appearing
in the task switcher if the windows weren’t filtered.
As an example, let’s say I have windows on two different screens:
- screen 1: 1 2 3
- screen 2: 4 5 6
I’ll be using [] to indicate selection in the task switcher tab box.
Case 1: most recently used are 1 4 2 3 5 6
Invoking the task switcher on screen 1 will display 4 [5] 6, instead of the
expected [4] 5 6
The index is shifted by one, because without the filter, there would 1 at the
top of the list.
Case 2: most recently used are 1 2 4 3 5 6
Invoking the task switcher on screen 1 will display 4 5 [6]
The index is shifted by two, because without the filter, there would 1 and 2 at
the top of the list.
Case 3: most recently used are 1 2 3 4 5 6
Invoking the task switcher on screen 1 will display [4] 5 6
The index is shifted by three, causing it to be correct by accident, because
without the filter, there would 1, 2 and 3 at the top of the list.
STEPS TO REPRODUCE
1. Use two screens
2. In “Task Switcher” KCM, for one of the task switcher, check “Screens” and
select “All other screens”
3. Use the configured task switcher to select a window of the other screen
OBSERVED RESULT
The task switcher very often doesn’t selected the most recently used window
matching the settings of the task switcher.
EXPECTED RESULT
The task switcher select the most recently used window matching the settings of
the task switcher.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.1
Kernel Version: 6.12.10-zen1-1-zen (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
I’m using alt+tab to switch between the windows of my current screen, and
win+tab to switch between the windows of the other screen, so win+tab (in
theory) works to select the window on top of the other screen or the other
windows if I press again tab while maintaining win, a setup which I’ve found
very useful and practical (except for the bug reported here).
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