Bug 435187

Summary:	no multi-modifiers only shortcuts support
Product:	[Plasma] kwin	Reporter:	Andrey <butirsky>
Component:	input	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde, liubomirwm, nate
Priority:	NOR
Version First Reported In:	5.8.9
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
URL:	https://blog.martin-graesslin.com/blog/2016/08/modifier-only-shortcuts-available-in-plasma-5-8/
See Also:	https://bugs.kde.org/show_bug.cgi?id=435181
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Andrey 2021-03-31 14:37:31 UTC

Plasma got support for modifier only shortcuts in Plasma 5.8:
https://blog.martin-graesslin.com/blog/2016/08/modifier-only-shortcuts-available-in-plasma-5-8/
That support spans to single modifier shortcuts only.
This prevents it from using the feature for common shortcuts switching layout such as Alt+Shift, Ctrl+Shift etc.
Using that shortcuts from XKB configuration has drawback as no non-modifier key combinations with this modifiers are longer possible, i.e. Alt+Shift+<some_non-modifier_key>, see bug 435181.

Typical ~/.config/kwinrc config for the feature looks like: 
[ModifierOnlyShorcuts]
Alt=
Control=
Meta=org.kde.krunner,/App,,display
Shift=org.kde.plasmashell,/PlasmaShell,org.kde.PlasmaShell,activateLauncherMenu