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Fixed in 5.3.5



Found in


Issue ID




[Standalone] UI elements on the edge of the screen still get mouse over input when your mouse is outside the window



Steps to reproduce:

1. Open attached project
2. Open scene "Main"
3. Notice that there's a button which isn't fully inside canvas
4. Build and run scene
5. Run in windowed mode
6. Move mouse outside of window and them move towards the button
7. Notice that button is highlighted even though mouse is outside game window

Reproduced with: 5.1.4f1, 5.2.4p1,5.3.2p3, 5.4.0b5

Comments (3)

  1. Dan-MacDonald

    Aug 31, 2016 18:27

    It seems the EventSystem.RaycastAll() returns hit results for elements that are partially onscreen, even when the raycast hit position is happening outside the window.

  2. Ewanuk

    Aug 11, 2016 14:32

    Still have this issue in 5.3.5f1

  3. RobertWebb

    May 27, 2016 02:17

    There are two new problems I see in our app which may be because of this fix:

    (1) We navigate our app on Windows desktop by holding down the left mouse button and dragging the mouse. When we drag outside the window, the previous clamping behaviour gave more expected results. Rather than either clamping or locking to the last point in the window, why not do the "usual" thing and capture the mouse position, even outside the window? See Microsoft's SetCapture() and ReleaseCapture() functions. This would give correct behaviour AND fix the original problem.

    (2) When running in the Editor, if I drag the mouse past the left side of the window, it suddenly acts as if it's on the far RIGHT of the window! So I'll be panning left and suddenly it will switch to panning fast right. Clearly this is a new bug. Only started doing this in 5.3.5, not in 5.3.4.


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