Created attachment 162965 [details] Video showing the window jumping, repeated two times SUMMARY Slowly dragging a window near the panel to let it defloat causes the window to jump up and down while dragging (bumpy effect). STEPS TO REPRODUCE 1. Open a window (non maximized). 2. Slowly (!) drag the window near the panel to let it defloat. 3. Window will jump while being dragged, see video attachment. The video shows the jumping two times, the second time a bit slower so it's more clear. OBSERVED RESULT Windows jumps while being dragged, bumpy effect. EXPECTED RESULT Window should not jump while dragging / panel defloat. SOFTWARE/OS VERSIONS Linux/KDE Plasma: neon-unstable-20231107-1001.iso KDE Plasma Version: 5.27.80 KDE Frameworks Version: 5.240.0 Qt Version: 6.6.0 ADDITIONAL INFORMATION
It's the window snapping behavior; the window snaps to the panel edge. It makes sense for an always-visible non-floating panel, which doesn't change its geometry in response to window movement. But I can see how it makes less sense for a dynamic panel that *does* change its geometry in response to window movement. So perhaps we should disable the "snap to panel" behavior when the panel is in Floating or Dodge Windows mode? Thoughts?
In the Dodge Windows plasma-desktop MR (https://invent.kde.org/plasma/plasma-desktop/-/merge_requests/1813), I changed the unfloat/hide threshold to 12px instead of the earlier 6px. This causes the window to unfloat/hide just before snapping behavior would kick in, and it works out smoothly.
Oh okay, that's another way to fix it, I guess, so feel free to mark that MR as fixing this bug. Or separate that part of the MR out into a new one and fix the bug separately.
That MR landed, and the change in there effectively fixes this issue.