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Make "double tap to zoom" precise across platforms (#1482)

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* Implement double tap for Android

* Match the new behavior on iOS
This commit is contained in:
dan 2023-09-20 02:32:44 +01:00 • committed by GitHub
parent 859588c3f6
commit d2c253a284
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 175 additions and 56 deletions
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12
src/view/com/lightbox/ImageViewing/components/ImageItem/ImageItem.ios.tsx
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@ -32,6 +32,7 @@ const SWIPE_CLOSE_VELOCITY = 1
const SCREEN = Dimensions.get('screen')
const SCREEN_WIDTH = SCREEN.width
const SCREEN_HEIGHT = SCREEN.height
const MAX_SCALE = 2
type Props = {
imageSrc: ImageSource
@ -58,13 +59,18 @@ const ImageItem = ({
const [loaded, setLoaded] = useState(false)
const [scaled, setScaled] = useState(false)
const imageDimensions = useImageDimensions(imageSrc)
const handleDoubleTap = useDoubleTapToZoom(scrollViewRef, scaled, SCREEN)
const handleDoubleTap = useDoubleTapToZoom(
scrollViewRef,
scaled,
SCREEN,
imageDimensions,
)
const [translate, scale] = getImageTransform(imageDimensions, SCREEN)
const scrollValueY = new Animated.Value(0)
const scaleValue = new Animated.Value(scale || 1)
const translateValue = new Animated.ValueXY(translate)
const maxScale = scale && scale > 0 ? Math.max(1 / scale, 1) : 1
const maxScrollViewZoom = MAX_SCALE / (scale || 1)
const imageOpacity = scrollValueY.interpolate({
inputRange: [-SWIPE_CLOSE_OFFSET, 0, SWIPE_CLOSE_OFFSET],
@ -118,7 +124,7 @@ const ImageItem = ({
pinchGestureEnabled
showsHorizontalScrollIndicator={false}
showsVerticalScrollIndicator={false}
maximumZoomScale={maxScale}
maximumZoomScale={maxScrollViewZoom}
contentContainerStyle={styles.imageScrollContainer}
scrollEnabled={swipeToCloseEnabled}
onScrollEndDrag={onScrollEndDrag}