FIX: Pen touch input triggers UI/Click action two times (ISXB-1456) #2201
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Codecov ReportAll modified and coverable lines are covered by tests ✅ @@ Coverage Diff @@
## develop #2201 +/- ##
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- Coverage 68.10% 68.10% -0.01%
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Files 367 367
Lines 53610 53601 -9
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- Hits 36513 36504 -9
Misses 17097 17097
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Pull Request Overview
This PR addresses an issue where pen/touch input could generate duplicate UI/click actions by simplifying pointer cleanup logic and enhancing the UI pointer integration tests.
- Removed special-case handling that delayed touch-pointer removal by one frame
- Simplified
FilterPointerStatesByTypeto only remove non–mouse/pen pointers - Expanded UI tests to cover simultaneous mouse and touch input and ensure single-click behavior
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| Packages/com.unity.inputsystem/InputSystem/Plugins/UI/InputSystemUIInputModule.cs | Commented out touch-delay block and changed pointer-filter condition |
| Assets/Tests/InputSystem/Plugins/UITests.cs | Added new test scenario for concurrent mouse and touch clicks |
Comments suppressed due to low confidence (2)
Packages/com.unity.inputsystem/InputSystem/Plugins/UI/InputSystemUIInputModule.cs:2365
- This simplified condition now removes touch pointers immediately, which may contradict the intended one-frame delay for touch cleanup. Verify that touch removal timing still matches expected input behavior and adjust the condition to retain touch pointers when needed.
if (m_PointerStates[i].pointerType != UIPointerType.MouseOrPen)
Assets/Tests/InputSystem/Plugins/UITests.cs:1464
- The test calls
EndTouchon ID 1, but no touch with ID 1 was started here. This mismatch may prevent proper cleanup of the previous touch and lead to false positives. EnsureEndTouchuses the same touch ID as the correspondingBeginTouch.
EndTouch(1, secondPosition, screen: touch1);
Comment on lines
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| // // We don't want to release touch pointers on the same frame they are released (unpressed). They get cleaned up one frame later in Process() | ||
| // ref var state = ref GetPointerStateForIndex(index); | ||
| // if (state.pointerType == UIPointerType.Touch && (state.leftButton.isPressed || state.leftButton.wasReleasedThisFrame)) | ||
| // { | ||
| // // The pointer was not removed | ||
| // return false; | ||
| // } |
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[nitpick] The double-commented block clutters the cleanup logic. Consider removing these dead code lines or extracting them behind a clearly named feature flag to improve readability.
Suggested change
| // // We don't want to release touch pointers on the same frame they are released (unpressed). They get cleaned up one frame later in Process() | |
| // ref var state = ref GetPointerStateForIndex(index); | |
| // if (state.pointerType == UIPointerType.Touch && (state.leftButton.isPressed || state.leftButton.wasReleasedThisFrame)) | |
| // { | |
| // // The pointer was not removed | |
| // return false; | |
| // } | |
| // Removed dead code block for clarity and readability. |
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This will be removed, it's just to help with testing at the moment.
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Description
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Testing status & QA
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Checklist
Before review:
Changed,Fixed,Addedsections.Area_CanDoX,Area_CanDoX_EvenIfYIsTheCase,Area_WhenIDoX_AndYHappens_ThisIsTheResult.During merge:
NEW: ___.FIX: ___.DOCS: ___.CHANGE: ___.RELEASE: 1.1.0-preview.3.After merge: