PanResponder onMoveShouldSetPanResponder delta not reset
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- Lenguaje dominante
- C++
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- Merge medio
- 1 d 23 h
- PR fusionados (30 d)
- 4
Descripción
Description
Delta is not reset between gestures when it returned false
PanResponder.create({
onMoveShouldSetPanResponder(e, gesture) {
const {dx, dy} = gesture
return false
},
})
That seems to be because none of the other callbacks are called and the inner state initial position isn't reset.
I'm currently fixing this with
function PanProvider({children}) {
const capturedPositionRef = useRef(null);
return <View onMoveShouldSetResponderCapture={({nativeEvent:{pageX, pageY}}) => {
// don't do anything, just capture the initial position
capturedPositionRef.current = {pageX, pageY}
return false
}}>
<PanContext.Provider value={capturedPositionRef}>{children}</PanContext.Provider>
</View>
}
export default function usePanResponderLock(direction: 'horizontal' | 'vertical') {
// uses the provider initial position
const captureGestureRef = usePanResponder();
return useRef(
PanResponder.create({
onMoveShouldSetPanResponder({ nativeEvent: { pageX, pageY } }) {
if (captureGestureRef.current) {
const { pageX: startX, pageY: startY } = captureGestureRef.current;
const dx = Math.abs(pageX - startX);
const dy = Math.abs(pageY - startY);
const dragging = dx > 2 || dy > 2;
if (!dragging) return false;
return direction === 'horizontal' ? dx > dy : dy > dx;
}
return false;
},
onPanResponderTerminationRequest() {
return true;
},
}),
).current;
}
This is working well, but the delta should be fixed in RN
Steps to reproduce
Try looking for a horizontal gesture with dx > dy:
- from the top left corner, make a vertical gesture => delta's are correct, view is not a responder.
- make a new horizontal gesture from bottom left corner => delta y is the distance with the previous touch and delta x too =>
dy > dxeven though it's a horizontal gesture
React Native Version
0.73.8
Affected Platforms
Runtime - Android
Output of npx react-native info
System:
OS: macOS 14.5
CPU: (12) arm64 Apple M2 Max
Memory: 277.72 MB / 32.00 GB
Shell:
version: "5.9"
path: /bin/zsh
Binaries:
Node:
version: 20.9.0
path: ~/.nvm/versions/node/v20.9.0/bin/node
Yarn:
version: 1.22.19
path: /usr/local/bin/yarn
npm:
version: 10.1.0
path: ~/.nvm/versions/node/v20.9.0/bin/npm
Watchman:
version: 2024.01.22.00
path: /opt/homebrew/bin/watchman
Managers:
CocoaPods:
version: 1.13.0
path: /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms:
- DriverKit 23.4
- iOS 17.4
- macOS 14.4
- tvOS 17.4
- visionOS 1.1
- watchOS 10.4
Android SDK: Not Found
IDEs:
Android Studio: 2022.3 AI-223.8836.35.2231.10811636
Xcode:
version: 15.3/15E204a
path: /usr/bin/xcodebuild
Languages:
Java:
version: 17.0.11
path: /usr/bin/javac
Ruby:
version: 3.3.0
path: /Users/gregoirevda/.rbenv/shims/ruby
npmPackages:
"@react-native-community/cli": Not Found
react: Not Found
react-native: Not Found
react-native-macos: Not Found
npmGlobalPackages:
"*react-native*": Not Found
Android:
hermesEnabled: Not found
newArchEnabled: Not found
iOS:
hermesEnabled: Not found
newArchEnabled: Not found
Stacktrace or Logs
No stacktrace error.
Reproducer
https://snack.expo.dev/@gregoirevda/bad-orange-popsicle
Screenshots and Videos
No response
Guía de contribución
Primeros pasos
- Lee el issue completo y luego la guía de contribución del proyecto.
- Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
- Haz un fork del repositorio y trabaja en una rama.
- Abre un pull request que haga referencia al número del issue.
Línea de trabajo
Comienza con el reproductor de Snack enlazado y la ruta PanResponder.create/onMoveShouldSetPanResponder; sigue cómo se inicializan y conservan los deltas del gesto cuando el callback devuelve false, centrándote en Android. Se considera terminado cuando un gesto nuevo informa de los deltas desde su propio inicio incluso si el gesto anterior nunca se convirtió en responder, y el comportamiento del reproductor está corregido.
Escrito por el modelo de indexación a partir del texto del issue.
Evaluación
- Stack tecnológico
- javascript, react-native
- Área
- mobile
- Tipo de issue
- Error
- Dificultad
- 4/5
- Tiempo estimado
- 3-5 días
- Estado de actividad
- Estancado
- Claridad
- Bastante claro
- Aptitud para principiantes
- 35/100