Smithay
resizing gtk 4 app in smallvil does not work as expected
You need to grab the gtk4 drop shadows to resize instead of the window itself.
I think you will need to support subsurfaces, otherwise shadows are treated as part of main surface.
I think you will need to support subsurfaces, otherwise shadows are treated as part of main surface.
We do support subsurfaces since the very beginning of the compositor module. Otherwise there would be no shadows to begin with..
This is probably caused by smallvil not handling the cursor state. It does not draw the cursor provided by the client, which can include a hotspot. So I would guess the location is offset by the cursor hotspot.
I think you will need to support subsurfaces, otherwise shadows are treated as part of main surface.
Smithay supports them, and GTK4 does not use them anyway, It is single XdgSurface with geometry set to window contents.
From my testing, it looks like everything is working as expected, it's just lack of cursor that makes it confusing. The hitbox in question is 1px wide, so you are basically trying to blindly hit that.
Visual representation of the hitbox of gtk4-demo: (red color is the one in question, blue is shadow)
