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fix(input): Don't raise Tapped when the element follows the finger - #25732
A touch swipe raised Tapped on the element under the finger when the element moved along with the finger, however long the swipe. That happens when a parent scrolls its content by handling the manipulation events itself, as the CommunityToolkit DataGrid does, or moves the element with a transform. A UIElement feeds its GestureRecognizer with points relative to the element, and the recognizer measured the tap distance on PointerPoint.Position, so the finger barely moved as far as the recognizer could tell. In WinUI, ElementGestureTracker feeds the element's recognizer with points relative to the root, so a swipe past the tap distance on screen is never a tap.
The recognizer of a UIElement now measures the tap distance on PointerPoint.RawPosition, which is relative to the window and which the manipulation tracking already uses for the same reason. This covers the tap, the double-tap, the hold and the start of a drag. The recognizer's own event args keep Position relative to the element; the routed events are covered below. Conversely, a press and a release at the same place on screen are now a tap even when the element moved under the finger in between, as in WinUI. A GestureRecognizer that an app creates and feeds itself keeps measuring on Position, the coordinate space of the points the app passes in. The gesture recognizer of an element whose only gestures are taps, double-taps or holds still gets no pointer moves, so a swipe that returns near its start on screen still ends in a tap; that predates this PR and is tracked in #25805.
The same change applies to zoomed or scaled content. The tap range (10 on Uno Platform) was measured in units of the element, so 10 × the scale on screen. It's now measured in the window, whatever the scale, as in WinUI, so it's 10 effective pixels. Content that is zoomed out (in a ScrollViewer with a ZoomFactor below 1, or under a ScaleTransform) is easier to tap, as small moves of the finger no longer cancel the tap, and zoomed-in content no longer turns a short swipe (up to 10 × the zoom factor on screen) into a tap.
Gesture positions. Since a tap can now complete after the element moved under a finger that stayed in place, the position it reports must not follow the element. In WinUI, the recognizer reports positions relative to the root, and the routed args resolve them when GetPosition is called. As in WinUI, the Tapped, DoubleTapped, RightTapped and Holding positions no longer follow the element. The routed args keep where the pointer pressed in the window and resolve it against the visual tree when GetPosition is called. So a GetPosition call made after the handler returns resolves against the visual tree as it is then, as on WinUI. They share the rules of ContextRequestedEventArgs.TryGetPosition (WinUI's ConvertGlobalPointToRelativePoint), which change a few edge cases compared with before: an element out of the live tree gets (0, 0), a popup out of the live tree stands for its child, and an element whose transform can't be inverted (scaled to 0) gets (0, 0). The ContextRequested position of a touch hold or a mouse or pen right-tap uses the same window position. Before, the gesture positions were the press position relative to the element, so they moved with the element, even after the event was raised; the ContextRequested position moved with it until the right-tap or hold was recognized.
Scoped InputInjector. With InputInjector.TryCreate(relativeRoot), every routed pointer event is converted to window coordinates, but the moves that reach the recognizer of an element with a manipulation come from the core args and weren't, so with the tap range now measured on the raw position, a 1 px move could cancel the tap when the root is more than the tap range (10) from the window origin. The moves are now converted the same way, once, before they're routed: the recognizers, and a drag, get the point PointerRoutedEventArgs converted, so a handler that moves the root while a move is routed doesn't shift where that move was. PointerRoutedEventArgs.GetCurrentPoint(relativeTo) starts from the converted position too. It used to report positions off by the offset of the root, so this corrects the positions every pointer event handler gets under a scoped injector whose root isn't at the window origin, not only gestures.
Tests: the runtime test Given_UIElement.When_Touch_Swipe_Then_Not_Tapped taps an element whose parent has ManipulationMode="TranslateX", then swipes 200 px from the same place with injected touch. The element has double-tap disabled, so the press of the swipe can't complete a double-tap on any platform, whatever its double-tap range. On Skia Desktop (Windows):
Case
Before
After
Tap
Tapped raised (passes)
Tapped raised (passes)
200 px swipe, the element stays in place
no Tapped (passes)
no Tapped (passes)
200 px swipe, the parent moves the element with the finger in ManipulationDelta
Tapped raised (fails)
no Tapped (passes)
Given_UIElement.When_Element_Moves_Under_Pointer_Then_Gesture_Positioned_At_Press presses, moves the element 30 px under the pointer, then completes a tap, a touch hold, or a mouse right-tap; a fourth row double-taps, which raises DoubleTapped at the second press, before the move. The element is scaled 2× and the press lands on its child, so the original source isn't the element. It checks GetPosition(null) and GetPosition(element) for Tapped, DoubleTapped, Holding (Started and Completed), RightTapped and ContextRequested, and the order they're raised in. In the tap and double-tap rows, the handler then moves the element on to 60 px and reads both positions again. On Skia Desktop (Windows), all four rows pass. Before the position changes, the tap and hold rows (then the only ones) were 30 px off. With the window position resolved when the routed args are created instead of when GetPosition is called, the tap and double-tap rows fail once the element moved on (587 and 617 instead of 557.2). On master, Tapped, and the RightTapped that ends a hold, aren't raised at all in this case.
Given_InputInjector_RelativeRoot.When_Touch_Moves_With_Offset_RelativeRoot_Then_Tapped_Only_Within_Range presses, moves 1 px (or 20 px) and back, and releases through an injector scoped to a root that is offset in the window, on an element with a manipulation mode and handler. With the 1 px move: on master, Tapped is raised but GetCurrentPoint(root) is off by the root's offset; with the tap range change alone, Tapped isn't raised; with the conversion, both pass. The 20 px row checks that the moves still reach the recognizer: no Tapped. A third row makes the 1 px move a single event whose PointerMoved handler moves the root by 50 px, then moves back to where the finger pressed on screen and releases. Converting the moves after they're routed, as this PR first did, fails it: Tapped isn't raised, as the move lands 51 px from the press. Converting them before routing passes.
The runtime tests are Uno-only on CI: the WinUI runtime-test project builds with them but, like the other tests guarded by HAS_INPUT_INJECTOR, skips them. Not run on WinUI locally.
New unit tests in Given_GestureRecognizer (Tapped_Delta_Raw, Tapped_Delta_Raw_Back_Over, Tapped_Element_Moved_Under_Pointer, DoubleTapped_Delta_Raw, Holding_Delta_Raw and Drag_Started_Mouse_Delta_Raw) feed a recognizer, with and without the internal setting, points whose raw position moves while their position stays, or the reverse, and Tapped_RawPosition_Is_The_Press checks that a tap carries the raw position of its press. They and the rest of Given_GestureRecognizer pass (86 tests), and so does Given_TappedRoutedEvent (10 tests).
I also ran Given_UIElement*, Given_GestureRecognizer, Given_InputManager, Given_InputInjector*, Given_ManipulationExtensions, Given_ContextRequested*, Given_ListViewBase*, Given_ScrollView*, Given_SwipeControl, Given_FlipView*, Given_Button, Given_Border, Given_TextBox*, Given_RichEditBox, Given_Hyperlink*, Given_CalendarView*, Given_TextBlock*, Given_RichTextBlock* and Given_InteractionTracker* on Skia Desktop (Windows): 2698 of the 2715 tests that ran pass. The 14 failures (both rows of Given_Border.Check_Border_Margin, eight Given_ListViewBase layout and scrolling tests, three Given_UIElement.When_*_ActualOffset tests, and Given_TextBlock.When_IsTextSelectionEnabled_CRLF, which reads the clipboard) and the 3 inconclusive tests give the same results on this machine without this change. Most of them compare sizes or offsets that come out differently at its 125% display scale, such as 50.4 instead of 50. Given_TreeView, Given_DragView and Given_Win32DragDrop pass too (34 tests). At 0e7fe82, rebased on master at 822f75d, I reran the gesture position, swipe and scoped InputInjector tests and Given_ContextRequested* (49 tests), and Given_GestureRecognizer and Given_TappedRoutedEvent (96 tests): all pass.
Rebased again on master at 46ea872, where #25818 raises Tapped and RightTapped once PointerReleased has bubbled. The deferred Tapped, RightTapped and ContextRequested keep the window position of the press, as above. On Skia Desktop (Windows), Given_UIElement*, Given_GestureRecognizer, Given_TappedRoutedEvent, Given_InputInjector*, Given_InputManager, Given_ContextRequested*, Given_ManipulationExtensions, Given_SwipeControl and Given_Button: 720 of the 723 runtime tests pass, and the 3 failures are the Given_UIElement.When_*_ActualOffset tests that fail the same way without this change (125% display scale). The unit tests pass (96 tests). At 7ef4a4c (the final head), Given_UIElement*, Given_ContextRequested*, Given_InputInjector*, Given_Button and Given_TappedRoutedEvent: 687 of 690 pass, with the same 3 ActualOffset failures.
Fixes #25731 by measuring UIElement gesture distances in window coordinates, preventing false taps when an element follows a swipe while preserving standalone recognizer behavior.
Changes:
Opts UIElement recognizers into raw-position distance checks.
Applies consistent checks to taps, double-taps, holds, and drag initiation.
Adds unit coverage and an injected-touch runtime regression test.
File
Description
src/Uno.UI/UI/Xaml/UIElement.Pointers.cs
Enables raw-position checks for UIElement recognizers.
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🟢 Approval recommended
The focused change consistently handles gesture coordinates, preserves standalone recognizer behavior, and includes targeted regression coverage with no unresolved findings.
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🔵 Needs a closer look
Unresolved gesture regressions can misreport positions after elements move, miss movement on gesture-only elements, and prematurely cancel gestures or start drags under offset roots.
[P2] On the managed-pointer path, a child with only Tapped/Holding handlers never reaches this check: move delivery is registered only for manipulation or drag. When its parent moves it with the finger, a swipe out and back still raises Tapped, and holding can fire while the finger is away. Route moves to active gesture-only recognizers as well, and cover both cases through injected UIElement input.
[P2] A stationary pointer can now produce a tap after the element moves, but TryRecognizeTap still emits the old Down.Position, which TappedRoutedEventArgs transforms using the current visual tree. Moving the element 30 pixels right therefore makes GetPosition(null) report 30 pixels right of the actual press. Convert the captured window-space press to current element coordinates when raising the gesture, apply the same correction to holding/right-tap positions, and test the reported coordinates.
Normalize scoped move points to window coordinates
[P2] With InputInjector.TryCreate(relativeRoot), down/up points have window-relative RawPosition, but UIElementRecognizer.GetRelativePoint leaves move points root-relative. If the root is offset by more than 10 pixels, even a one-pixel move on a manipulation/drag-enabled element can cancel its tap or hold and start dragging prematurely. Normalize scoped move points to window coordinates before forwarding them, and add a regression test with an offset root.
Thanks. I checked the three items against the code, and with runtime tests on Skia Desktop (Windows), before changing anything.
1. Deliver moves to gesture-only recognizers. Real, but it predates this PR, so it's tracked in #25805 rather than fixed here. This PR doesn't make it more likely in practice, though it changes which out-and-back swipes slip through: the finger now has to return near its start on screen, where before it had to return near its start on the element.
On every runtime target (Skia and WebAssembly define UNO_HAS_MANAGED_POINTERS), UIElement.OnPointerMove doesn't feed the recognizer: that code is under #if !UNO_HAS_MANAGED_POINTERS. Moves reach a UIElement recognizer only through the InputManager, which registers it in OnRecognizerManipulationStarting, so only when the element has a manipulation or drag (InputManager.Pointers.ManagedDirectManip.cs: "Currently, to avoid any regression for 6.0 SR1, only the move is processed").
I confirmed it with a throwaway runtime test on a stationary element with only a Tapped handler: press, move 200 px away and back, release raises Tapped. With a Holding handler and a 1.5 s pause away, Holding starts while the finger is 200 px away. The results are the same on master (b40e235) and on this branch, and the element doesn't need to move at all.
WinUI does deliver them: ElementGestureTracker::ProcessPointerMessage passes every XCP_POINTERUPDATE to the element's recognizer.
The fix is cheaper than it looks: Gesture.ProcessMove only reads the tap-range position (the raw, window position for a UIElement recognizer), the pointer identifier, the pressure and the timestamps, so a gesture-only recognizer can take the move as is, without computing a position relative to the element. The real costs are registering every element whose recognizer tracks a press for moves (and unregistering it on release or cancel), and the behavior change: it changes when every such element cancels its tap or hold. That deserves its own review, in Tapped and Holding ignore finger moves unless the element has a manipulation #25805.
2. Correct gesture positions after the element moves. Real, and this PR makes it reachable: before it, a tap needed the element to stay within 10 px of the finger, so the position was off by less than 10 px from where the finger was; now the element can move any distance. Fixed in a8e9df1.
In WinUI, GestureRecognizerAdapter::OnTapped, OnRightTapped and OnHolding pass on the recognizer's position, which is root-relative since ElementGestureTracker feeds it root-relative points, and the routed args resolve it when GetPosition is called (CInputPointEventArgs::GetPosition). So the position doesn't follow the element.
The gesture args now carry the raw position of the press (relative to the window for a UIElement recognizer). The Tapped, DoubleTapped, RightTapped and Holding routed args keep it and resolve it when GetPosition is called, with the same rules as ContextRequestedEventArgs.TryGetPosition (WinUI's ConvertGlobalPointToRelativePoint), so the position doesn't follow the element even after the event was raised. The ContextRequested position (touch hold, mouse or pen right-tap) uses the same window position.
Given_UIElement.When_Element_Moves_Under_Pointer_Then_Gesture_Positioned_At_Press presses on a child of a scaled element, moves the element 30 px under the pointer, then completes a tap, a touch hold or a mouse right-tap; a fourth row double-taps, which raises DoubleTapped at the second press, before the move. It checks GetPosition(null) and GetPosition(element) for Tapped, DoubleTapped, Holding, RightTapped and ContextRequested, and the order they're raised in; in the tap and double-tap rows, the handler then moves the element on and reads both positions again. All four rows pass. Before the fix, the tap and hold rows (then the only ones) were 30 px off (587 instead of 557.2); with the positions resolved when the routed args were created, the tap and double-tap rows still failed once the element moved on (587 and 617 instead of 557.2). On master, Tapped, and the RightTapped that ends a hold, aren't raised at all in this case.
3. Normalize scoped move points to window coordinates. Real, and this PR exposes it. Fixed in 026056f.
PointerRoutedEventArgs converts every routed pointer event of a scoped injector to the window; the recognizer's moves, though, come from the core args through UIElementRecognizer.GetRelativePoint, so their RawPosition stayed relative to the root. PointerRoutedEventArgs.GetCurrentPoint(relativeTo) also computed the position from the root-relative point, so element positions were off by the root's offset.
Before this PR, the tap range used Position, which was off by the same amount on the press and the moves, so it cancelled out. With the range on RawPosition, the press and the moves disagree by the root's offset.
Moves are now brought to window coordinates, like the routed events, and GetCurrentPoint(relativeTo) starts from the window position. The same conversion covers the hold and the drag start, which are measured on the same raw position, so an offset root no longer starts a drag early either.
Given_InputInjector_RelativeRoot.When_Touch_Moves_With_Offset_RelativeRoot_Then_Tapped_Only_Within_Range uses a root offset in the window and a target with a manipulation mode and handler, so that its recognizer gets the moves, then presses, moves 1 px and back, and releases through InputInjector.TryCreate(root). Results:
on master, Tapped is raised, but GetCurrentPoint(root) reports -458,-6 instead of 100,100;
on this branch before the fix, Tapped isn't raised;
with the fix, both pass, and so does the rest of Given_InputInjector_RelativeRoot.
A second row moves 20 px and back: no Tapped, which checks that the moves still reach the recognizer.
I also reran the PR's broader input set on Skia Desktop (Windows), plus Given_Hyperlink* and Given_CalendarView*, and Given_TextBlock* and Given_RichTextBlock*, which read gesture positions: 2685 of the 2702 tests that ran pass. The 14 failures and 3 inconclusive tests are the same as without this PR: most of them compare sizes or offsets at this machine's 125% display scale, and one reads the clipboard. After the last local review changes, and again after squashing the PR and rebasing it on master, I reran the gesture position, swipe and scoped InputInjector tests and Given_ContextRequested* (48 tests), and the Given_GestureRecognizer and Given_TappedRoutedEvent unit tests (96): all pass.
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🟡 Changes recommended
Gesture processing can use shifted or raw coordinates instead of the captured pointer position, and the runtime test does not reset shared window content.
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🔵 Needs a closer look
Shared gesture-coordinate changes affect all platforms, but validation was limited to injected Skia Desktop input, leaving WebAssembly touch and native WinUI parity unverified.
I also ran the runtime tests on Skia WebAssembly, in headless Chrome 156.0.8078.49 on Windows. The input is injected, as on desktop.
Tests
Skia Desktop (Windows)
Skia WebAssembly
This PR's tests (scoped InputInjector, gesture positions, swipe) and Given_ContextRequested*
49 of 49 pass
49 of 49 pass
The wider set listed in the description, plus Given_TreeView, Given_DragView and Given_Win32DragDrop
2698 of 2715 pass, and 34 of 34 in the three drag classes; the 14 failures and 3 inconclusive tests are the same without this PR
2566 of 2601 pass; 1 failure and 34 inconclusive, the same as master
On WebAssembly, I ran the wider set on master too: every test both runs share gives the same result, and the only difference is this PR's 9 new tests, which pass. The one failure, Given_TextBlock.Check_FontFallback_Shaping2, times out after a minute in the long run with and without this PR, and passes when run alone. Two of the inconclusive tests are ScrollViewer wheel tests whose timing guards trip in the long run; they pass when run alone, with and without this PR.
On WinUI, the runtime-test project builds the gesture tests but skips them, like every test here guarded by HAS_INPUT_INJECTOR, and the scoped InputInjector tests are Uno-only. The parity with WinUI rests on its source, cited in the description.
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Takes Uno's servicing/6.8 from 6951c2c up to 5254ace (42 pull
requests). Conflicts, by area:
IME and TextBox (unoplatform#25984, backport of unoplatform#25804; unoplatform#25952, backport of unoplatform#25619;
unoplatform#25976, backport of unoplatform#25818)
- Takes upstream's composition design (unoplatform#25804): the browser's input is
the source of truth for the text, compositions included. This drops
the composition parts of the unoplatform#24502 port (90746b8): its
TypeScript composition handling, the StartIndex/TextChangePending
event arguments, the IsReadOnly forwarding to the hidden input, and
its Given_TextBox.BrowserSoftKeyboard tests.
- Keeps the non-IME browser fixes on top of it, in the form their
master pull requests have on unoplatform#25804: Enter raised once per press and
tracked by key code (unoplatform#25174, with Given_TextBox.BrowserEnterKey from
master in place of the Enter tests that lived in the dropped file),
the iOS refocus on tap (unoplatform#25185), pastes without text and isIOS from
BrowserInputHelper.
- Moves the unoplatform#26005 MaxLength fixes onto unoplatform#25804's native input path, as
master has them: a refused browser edit keeps the TextBox's selection,
TextBoxView.UpdateTextFromNative reports whether the edit went in, and
the IME keeps its range on the applied text (master be85699, which
d226897 had ported onto the unoplatform#24502 IME). Adds that commit's browser
and platform-applied IME tests.
- TextBox.pointers.skia.cs: upstream's file (unoplatform#25619 iOS touch editing,
unoplatform#25818, unoplatform#25804), with the unoplatform#25126 port (the hold acts when it starts,
a touch right-tap keeps the caret) in the form master's unoplatform#25126 branch
has it on unoplatform#25619, including focusing before the iOS hold timer acts
and its iOS not-focusable test.
Pointers (unoplatform#25976, backport of unoplatform#25818)
- Tapped and RightTapped are raised once the PointerReleased bubbled
(unoplatform#25818), with the unoplatform#25732 port's window coordinates (2-argument
routed event args, RawPosition for ContextRequested), as master's
unoplatform#25732 branch has them.
- The release wrapper of unoplatform#25818 keeps the unoplatform#25126 port's
StopContextMenuTimer at the start of the release.
DependencyObject (unoplatform#26142, backport of unoplatform#26123)
- Takes upstream, then the code of unoplatform#25839 (97a2f17), which replaces
this branch's unoplatform#25102 ports (800247f, be41da6, fd40bf9,
7546379). DependencyObjectStore.Binder.cs, .alc.cs,
Application.Alc.cs, ResourceDictionary.alc.cs and their tests now
match unoplatform#25839; this drops 800247f's own
SingleParentNonFE_Parent_Removes_Value_Then_Next_Parent_Starts_Clean
test, which unoplatform#25839 doesn't have.
Imaging (unoplatform#25597, unoplatform#25915, unoplatform#25911, unoplatform#25897)
- Keeps this branch's side: it has the later forms of these fixes
(unoplatform#25124, unoplatform#25559, unoplatform#25633 and unoplatform#26370 ports), where upstream has the
6.8-only unoplatform#25597 design and earlier snapshots. Upstream's shared
download, IgnoreImageCache and failed-load fixes are covered by
SharedImageDecode. Adds upstream's When_Source_Outlives_Brushes test.
ToolTip (unoplatform#26098, backport of unoplatform#25137 and unoplatform#26096)
- Keeps this branch's unoplatform#25137 port and adds unoplatform#26096 in master's form: the
service releases only a ToolTip it opened, and leaves one the app
opened during the show delay to the app. Keeps both sides' tests.
Flyout (unoplatform#26062, backport of unoplatform#26060)
- This branch had the same commits already; keeps the "Keep
non-resizable flyouts in window" port and its tests.
Also removes a helper pair in Given_AccessibleTextBox that both sides
added.
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GitHub Issue: closes #25731
PR Type:
🐞 Bugfix
What changed? 🚀
A touch swipe raised
Tappedon the element under the finger when the element moved along with the finger, however long the swipe. That happens when a parent scrolls its content by handling the manipulation events itself, as the CommunityToolkitDataGriddoes, or moves the element with a transform. AUIElementfeeds itsGestureRecognizerwith points relative to the element, and the recognizer measured the tap distance onPointerPoint.Position, so the finger barely moved as far as the recognizer could tell. In WinUI,ElementGestureTrackerfeeds the element's recognizer with points relative to the root, so a swipe past the tap distance on screen is never a tap.The recognizer of a
UIElementnow measures the tap distance onPointerPoint.RawPosition, which is relative to the window and which the manipulation tracking already uses for the same reason. This covers the tap, the double-tap, the hold and the start of a drag. The recognizer's own event args keepPositionrelative to the element; the routed events are covered below. Conversely, a press and a release at the same place on screen are now a tap even when the element moved under the finger in between, as in WinUI. AGestureRecognizerthat an app creates and feeds itself keeps measuring onPosition, the coordinate space of the points the app passes in. The gesture recognizer of an element whose only gestures are taps, double-taps or holds still gets no pointer moves, so a swipe that returns near its start on screen still ends in a tap; that predates this PR and is tracked in #25805.The same change applies to zoomed or scaled content. The tap range (10 on Uno Platform) was measured in units of the element, so 10 × the scale on screen. It's now measured in the window, whatever the scale, as in WinUI, so it's 10 effective pixels. Content that is zoomed out (in a
ScrollViewerwith aZoomFactorbelow 1, or under aScaleTransform) is easier to tap, as small moves of the finger no longer cancel the tap, and zoomed-in content no longer turns a short swipe (up to 10 × the zoom factor on screen) into a tap.Gesture positions. Since a tap can now complete after the element moved under a finger that stayed in place, the position it reports must not follow the element. In WinUI, the recognizer reports positions relative to the root, and the routed args resolve them when
GetPositionis called. As in WinUI, theTapped,DoubleTapped,RightTappedandHoldingpositions no longer follow the element. The routed args keep where the pointer pressed in the window and resolve it against the visual tree whenGetPositionis called. So aGetPositioncall made after the handler returns resolves against the visual tree as it is then, as on WinUI. They share the rules ofContextRequestedEventArgs.TryGetPosition(WinUI'sConvertGlobalPointToRelativePoint), which change a few edge cases compared with before: an element out of the live tree gets (0, 0), a popup out of the live tree stands for its child, and an element whose transform can't be inverted (scaled to 0) gets (0, 0). TheContextRequestedposition of a touch hold or a mouse or pen right-tap uses the same window position. Before, the gesture positions were the press position relative to the element, so they moved with the element, even after the event was raised; theContextRequestedposition moved with it until the right-tap or hold was recognized.Scoped
InputInjector. WithInputInjector.TryCreate(relativeRoot), every routed pointer event is converted to window coordinates, but the moves that reach the recognizer of an element with a manipulation come from the core args and weren't, so with the tap range now measured on the raw position, a 1 px move could cancel the tap when the root is more than the tap range (10) from the window origin. The moves are now converted the same way, once, before they're routed: the recognizers, and a drag, get the pointPointerRoutedEventArgsconverted, so a handler that moves the root while a move is routed doesn't shift where that move was.PointerRoutedEventArgs.GetCurrentPoint(relativeTo)starts from the converted position too. It used to report positions off by the offset of the root, so this corrects the positions every pointer event handler gets under a scoped injector whose root isn't at the window origin, not only gestures.Tests: the runtime test
Given_UIElement.When_Touch_Swipe_Then_Not_Tappedtaps an element whose parent hasManipulationMode="TranslateX", then swipes 200 px from the same place with injected touch. The element has double-tap disabled, so the press of the swipe can't complete a double-tap on any platform, whatever its double-tap range. On Skia Desktop (Windows):Tappedraised (passes)Tappedraised (passes)Tapped(passes)Tapped(passes)ManipulationDeltaTappedraised (fails)Tapped(passes)Given_UIElement.When_Element_Moves_Under_Pointer_Then_Gesture_Positioned_At_Presspresses, moves the element 30 px under the pointer, then completes a tap, a touch hold, or a mouse right-tap; a fourth row double-taps, which raisesDoubleTappedat the second press, before the move. The element is scaled 2× and the press lands on its child, so the original source isn't the element. It checksGetPosition(null)andGetPosition(element)forTapped,DoubleTapped,Holding(StartedandCompleted),RightTappedandContextRequested, and the order they're raised in. In the tap and double-tap rows, the handler then moves the element on to 60 px and reads both positions again. On Skia Desktop (Windows), all four rows pass. Before the position changes, the tap and hold rows (then the only ones) were 30 px off. With the window position resolved when the routed args are created instead of whenGetPositionis called, the tap and double-tap rows fail once the element moved on (587 and 617 instead of 557.2). Onmaster,Tapped, and theRightTappedthat ends a hold, aren't raised at all in this case.Given_InputInjector_RelativeRoot.When_Touch_Moves_With_Offset_RelativeRoot_Then_Tapped_Only_Within_Rangepresses, moves 1 px (or 20 px) and back, and releases through an injector scoped to a root that is offset in the window, on an element with a manipulation mode and handler. With the 1 px move: onmaster,Tappedis raised butGetCurrentPoint(root)is off by the root's offset; with the tap range change alone,Tappedisn't raised; with the conversion, both pass. The 20 px row checks that the moves still reach the recognizer: noTapped. A third row makes the 1 px move a single event whosePointerMovedhandler moves the root by 50 px, then moves back to where the finger pressed on screen and releases. Converting the moves after they're routed, as this PR first did, fails it:Tappedisn't raised, as the move lands 51 px from the press. Converting them before routing passes.The runtime tests are Uno-only on CI: the WinUI runtime-test project builds with them but, like the other tests guarded by
HAS_INPUT_INJECTOR, skips them. Not run on WinUI locally.New unit tests in
Given_GestureRecognizer(Tapped_Delta_Raw,Tapped_Delta_Raw_Back_Over,Tapped_Element_Moved_Under_Pointer,DoubleTapped_Delta_Raw,Holding_Delta_RawandDrag_Started_Mouse_Delta_Raw) feed a recognizer, with and without the internal setting, points whose raw position moves while their position stays, or the reverse, andTapped_RawPosition_Is_The_Presschecks that a tap carries the raw position of its press. They and the rest ofGiven_GestureRecognizerpass (86 tests), and so doesGiven_TappedRoutedEvent(10 tests).I also ran
Given_UIElement*,Given_GestureRecognizer,Given_InputManager,Given_InputInjector*,Given_ManipulationExtensions,Given_ContextRequested*,Given_ListViewBase*,Given_ScrollView*,Given_SwipeControl,Given_FlipView*,Given_Button,Given_Border,Given_TextBox*,Given_RichEditBox,Given_Hyperlink*,Given_CalendarView*,Given_TextBlock*,Given_RichTextBlock*andGiven_InteractionTracker*on Skia Desktop (Windows): 2698 of the 2715 tests that ran pass. The 14 failures (both rows ofGiven_Border.Check_Border_Margin, eightGiven_ListViewBaselayout and scrolling tests, threeGiven_UIElement.When_*_ActualOffsettests, andGiven_TextBlock.When_IsTextSelectionEnabled_CRLF, which reads the clipboard) and the 3 inconclusive tests give the same results on this machine without this change. Most of them compare sizes or offsets that come out differently at its 125% display scale, such as 50.4 instead of 50.Given_TreeView,Given_DragViewandGiven_Win32DragDroppass too (34 tests). At 0e7fe82, rebased onmasterat 822f75d, I reran the gesture position, swipe and scopedInputInjectortests andGiven_ContextRequested*(49 tests), andGiven_GestureRecognizerandGiven_TappedRoutedEvent(96 tests): all pass.Rebased again on
masterat 46ea872, where #25818 raisesTappedandRightTappedoncePointerReleasedhas bubbled. The deferredTapped,RightTappedandContextRequestedkeep the window position of the press, as above. On Skia Desktop (Windows),Given_UIElement*,Given_GestureRecognizer,Given_TappedRoutedEvent,Given_InputInjector*,Given_InputManager,Given_ContextRequested*,Given_ManipulationExtensions,Given_SwipeControlandGiven_Button: 720 of the 723 runtime tests pass, and the 3 failures are theGiven_UIElement.When_*_ActualOffsettests that fail the same way without this change (125% display scale). The unit tests pass (96 tests). At 7ef4a4c (the final head),Given_UIElement*,Given_ContextRequested*,Given_InputInjector*,Given_ButtonandGiven_TappedRoutedEvent: 687 of 690 pass, with the same 3ActualOffsetfailures.PR Checklist ✅
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