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fix(linux): set the Wayland window app_id so the dock shows the icon

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The AppImage ships both the .desktop file and the hicolor icon, yet the dock
button came up blank on Wayland. A Wayland compositor has no StartupWMClass to
key on — it matches a window's app_id against the basename of an installed
.desktop file to find its icon — and iced defaults window app_id to an empty
string, which OCS never overrode, so nothing matched.

Set application_id to the reverse-DNS id the .desktop is installed under,
reusing the existing file_association::APP_ID const rather than a second copy.

iced enables both the x11 and wayland winit backends by default and feeds the
same application_id to each: on Wayland it is the app_id, on X11 it becomes
WM_CLASS. So this also changes the X11 WM_CLASS, and the old
StartupWMClass=OpenCADStudio would no longer match — realign it to the same id
so X11 keeps working too.

Confirmed on COSMIC/Wayland: the dock icon now appears. This is the Linux half
of the same class of bug as the Windows taskbar report (#392, still open): the
window not carrying the identity the OS needs to find its packaged icon.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Hakan Seven 2026-07-16 10:47:11 +03:00
commit 49cd0809a2
3 changed files with 17 additions and 5 deletions
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2
packaging/OpenCADStudio.desktop
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@ -8,4 +8,4 @@ Type=Application
Categories=Graphics;Engineering;
MimeType=image/vnd.dwg;image/vnd.dxf;
Keywords=CAD;DWG;DXF;drawing;design;engineering;2D;3D;
StartupWMClass=OpenCADStudio
StartupWMClass=io.github.HakanSeven12.OpenCadStudio