[coldhighsun]

Problem

A window docked to a screen edge sometimes slid back to its edge while the pointer was still on it.

The hide decision relied only on IsPointerOver, which is updated by pointer enter/exit events. After a context menu, flyout or drag took the pointer, the window is told the pointer left and is never told it is back while the pointer stays still. The next leave check then saw false and hid the window under the pointer. The same stale state affected the checks that run after a tool window closes, a drag ends, the window is resized, or the screens change.

Change

• Add EdgeDockRules.ContainsPointer, a pure check of a pointer position against the window bounds with a 1 px margin.
• Add MainWindow.IsPointerOnWindow(): IsPointerOver, or the system pointer position (TrayCursor.TryGetPosition) inside the window bounds. Use it in the leave check, the resume check, the settle check and the held-slide recheck.
• Add unit tests for ContainsPointer, including edge values and negative coordinates (a screen left of the primary one).

Limitations

• On Linux the system does not report the pointer position, so behavior there is unchanged (IsPointerOver only).
• A topmost window covering part of the docked window keeps it open while the pointer is over that part.

Testing

• dotnet build FluxTick.slnx
• dotnet test --project tests/FluxTick.App.Tests --filter-class "*EdgeDock*"
• Not reproduced by hand: the original problem is intermittent.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!