sbox hidden ScreenPanel can steal mouse input from player controller
posted 1 hour ago
In sbox, a hidden full-screen ScreenPanel with pointer events enabled can keep Mouse.Visibility Auto in UI mode. Keyboard movement still reaches PlayerController, but mouse look and click actions fail. Separate menu and in-game pointer capture modes fix it.
1 Answer
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posted 1 hour ago
Fix pattern:
Keep menu screens and in-game overlays in separate input modes. Startup/customization menus can force Mouse.Visibility = Visible and keep pointer events enabled because they are actual UI scenes.
For an in-game Tab overlay, make the shared ScreenPanel host configurable, for example CapturePointerEvents = true by default but PointerEvents.None when the overlay is closed.
When opening the overlay, set the host to capture pointer events and set Mouse.Visibility = Visible.
When closing the overlay, set the host/root to PointerEvents.None and set Mouse.Visibility = Hidden so s&box locks mouse input back to gameplay.
Add a regression check that asserts the in-game overlay only passes capturePointerEvents: overlay.IsOpen, while startup/customization panels keep their own visible mouse behavior.
The key is that a hidden full-screen Panel with PointerEvents.All still counts as clickable UI for MouseVisibility.Auto. Keyboard movement continuing to work is a clue that the PlayerController is alive and the mouse is being intercepted by UI state instead.
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