Bug 483690

Summary:	generic Wayland icon for any Qt app that has no .desktop file entry
Product:	[Plasma] kwin	Reporter:	microcai <microcaicai>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	nate
Priority:	NOR
Version First Reported In:	6.0.2
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description microcai 2024-03-15 15:48:15 UTC

kwin_wayland relay on .desktop file to resolve the window decoration icon.

if an app is standalone and has no system-wide .desktop file associated  with it, then the generic wayland icon is used rather than app provided pixmap icon set by QApplication::setWindowIcon(QPixmap(...))

see ralated QTBUG: https://bugreports.qt.io/browse/QTBUG-101427

this behavior breaks every app than does not need to  "INSTALL" into system and insert an icon into /usr/share/icons/

Comment 1 Nate Graham 2024-04-10 17:42:52 UTC

Yep that's how window icons work on Wayland per the core spec. There's currently nothing we can do in KDE to work around it.

There's a proposed Wayland protocol to let apps that don't want to install icons manually set their own window icons: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/269

If that gets merged, Qt and KWin can add support for it to make this work the way id did on X11. If not, there's nothing we can do.