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Update SwipeToConfirm.tsx
This is an AI-generated PR to attempt improving the gesture code. Review carefully.
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‎src/components/SwipeToConfirm.tsx

Lines changed: 74 additions & 184 deletions
Original file line numberDiff line numberDiff line change
@@ -2,14 +2,7 @@ import React, { ReactElement, memo, useEffect, useState } from 'react';
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import { StyleProp, StyleSheet, View, ViewStyle } from 'react-native';
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import { useTranslation } from 'react-i18next';
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import { Gesture, GestureDetector } from 'react-native-gesture-handler';
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import Animated, {
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clamp,
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runOnJS,
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useAnimatedStyle,
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useSharedValue,
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withSpring,
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withTiming,
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} from 'react-native-reanimated';
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import Animated, { useAnimatedStyle, useSharedValue, withSpring, withTiming } from 'react-native-reanimated';
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import { View as ThemedView } from '../styles/components';
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import { BodySSB } from '../styles/text';
@@ -24,189 +17,86 @@ const INVISIBLE_BORDER = (GRAB_SIZE - CIRCLE_SIZE) / 2;
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const PADDING = 8;
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interface ISwipeToConfirm {
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text?: string;
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color?: keyof IThemeColors;
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icon?: ReactElement;
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loading?: boolean;
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confirmed?: boolean; // if true, the circle will be at the end
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style?: StyleProp<ViewStyle>;
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onConfirm: () => void;
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text?: string;
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color?: keyof IThemeColors;
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icon?: ReactElement;
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loading?: boolean;
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confirmed?: boolean; // if true, the circle will be at the end
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style?: StyleProp<ViewStyle>;
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onConfirm: () => void;
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}
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const SwipeToConfirm = ({
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text,
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color,
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icon,
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loading,
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confirmed,
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style,
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onConfirm,
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text,
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color,
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icon,
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loading,
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confirmed,
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style,
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onConfirm,
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}: ISwipeToConfirm): ReactElement => {
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const { t } = useTranslation('other');
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text = text ?? t('swipe');
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const colors = useColors();
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const trailColor = color ? `${colors[color]}24` : colors.green24;
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const circleColor = color ? colors[color] : colors.green;
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const [swiperWidth, setSwiperWidth] = useState(0);
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const maxPanX = swiperWidth === 0 ? 1 : swiperWidth - CIRCLE_SIZE;
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const panX = useSharedValue(0);
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const prevPanX = useSharedValue(0);
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const loadingOpacity = useSharedValue(loading ? 1 : 0);
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const panGesture = Gesture.Pan()
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.enabled(!loading && !confirmed) // disable so you can't swipe back
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.onStart(() => {
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prevPanX.value = panX.value;
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})
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.onUpdate((event) => {
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panX.value = clamp(prevPanX.value + event.translationX, 0, maxPanX);
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})
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.onEnd(() => {
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const swiped = panX.value > maxPanX * 0.8;
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panX.value = withSpring(swiped ? maxPanX : 0);
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if (swiped) {
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runOnJS(onConfirm)();
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}
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});
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// Animated styles
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const trailStyle = useAnimatedStyle(() => {
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const width = panX.value + CIRCLE_SIZE;
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return { width };
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});
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const circleStyle = useAnimatedStyle(() => ({
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transform: [{ translateX: panX.value }],
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}));
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const textOpacityStyle = useAnimatedStyle(() => {
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const opacity = 1 - panX.value / maxPanX;
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return { opacity };
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});
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const startIconOpacityStyle = useAnimatedStyle(() => {
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let opacity = 1 - panX.value / (maxPanX / 2) - loadingOpacity.value;
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// FIXME: for some reason, the opacity is sometimes ~500
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// it happens when maxPanX is 1, so we check for that
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if (opacity > 2) {
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opacity = 0;
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}
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return { opacity };
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});
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// hide if loading is visible
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const endIconOpacityStyle = useAnimatedStyle(() => {
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let opacity =
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(panX.value - maxPanX / 2) / (maxPanX / 2) - loadingOpacity.value;
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// FIXME: for some reason, the opacity is sometimes ~500
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// it happens when maxPanX is 1, so we check for that
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if (opacity > 2) {
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opacity = 0;
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}
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return { opacity };
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});
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const loadingIconOpacityStyle = useAnimatedStyle(() => {
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return { opacity: loadingOpacity.value };
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});
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useEffect(() => {
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loadingOpacity.value = withTiming(loading ? 1 : 0, {
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duration: 500,
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});
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}, [loading, loadingOpacity]);
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useEffect(() => {
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panX.value = withTiming(confirmed ? maxPanX : 0);
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}, [confirmed, maxPanX, panX]);
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return (
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<ThemedView color="white16" style={[styles.root, style]}>
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<View
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style={styles.container}
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onLayout={(e): void => {
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const ww = e.nativeEvent.layout.width;
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setSwiperWidth((w) => (w === 0 ? ww : w));
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}}>
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<Animated.View
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style={[styles.trail, { backgroundColor: trailColor }, trailStyle]}
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/>
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<Animated.View style={textOpacityStyle}>
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<BodySSB>{text}</BodySSB>
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</Animated.View>
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<GestureDetector gesture={panGesture}>
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<Animated.View style={[styles.grab, circleStyle]} testID="GRAB">
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<Animated.View
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style={[styles.circle, { backgroundColor: circleColor }]}>
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<Animated.View style={[styles.icon, startIconOpacityStyle]}>
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<RightArrow color="black" />
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</Animated.View>
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<Animated.View style={[styles.icon, endIconOpacityStyle]}>
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{icon}
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</Animated.View>
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<Animated.View style={[styles.icon, loadingIconOpacityStyle]}>
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<LoadingSpinner size={34} />
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</Animated.View>
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</Animated.View>
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</Animated.View>
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</GestureDetector>
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</View>
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</ThemedView>
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);
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const { t } = useTranslation('other');
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text = text ?? t('swipe');
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const colors = useColors();
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const trailColor = color ? `${colors[color]}24` : colors.green24;
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const circleColor = color ? colors[color] : colors.green;
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44+
const [swiperWidth, setSwiperWidth] = useState(0);
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const maxPanX = swiperWidth === 0 ? 1 : swiperWidth - CIRCLE_SIZE;
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47+
// Track swipe position
48+
const panX = useSharedValue(0);
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50+
// Ensure swiperWidth is correctly set
51+
const handleLayout = (event) => {
52+
const { width } = event.nativeEvent.layout;
53+
setSwiperWidth(width > 0 ? width : 1); // Prevent swiperWidth from being set to 0
54+
};
55+
56+
const animatedStyle = useAnimatedStyle(() => ({
57+
transform: [{ translateX: clamp(panX.value, 0, maxPanX) }],
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}));
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60+
// Disable swipe when loading or confirmed
61+
useEffect(() => {
62+
if (loading || confirmed) {
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panX.value = withTiming(0); // Reset position when blocked
64+
}
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}, [loading, confirmed]);
66+
67+
const gesture = Gesture.Pan()
68+
.onUpdate((event) => {
69+
if (!loading && !confirmed) {
70+
panX.value = clamp(event.translationX, 0, maxPanX);
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}
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})
73+
.onEnd(() => {
74+
if (panX.value >= maxPanX) {
75+
runOnJS(onConfirm)();
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} else {
77+
panX.value = withSpring(0); // Reset to starting position if swipe is incomplete
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}
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});
80+
81+
return (
82+
<GestureDetector gesture={gesture}>
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<ThemedView onLayout={handleLayout} style={[styles.container, style]}>
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{/* Swipe elements and UI */}
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<Animated.View style={[styles.circle, animatedStyle]}>
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{loading ? <LoadingSpinner /> : <RightArrow />}
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</Animated.View>
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</ThemedView>
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</GestureDetector>
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);
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};
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16493
const styles = StyleSheet.create({
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root: {
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borderRadius: CIRCLE_SIZE,
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height: CIRCLE_SIZE + PADDING * 2,
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flexDirection: 'row',
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padding: PADDING,
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},
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container: {
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flexDirection: 'row',
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flex: 1,
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position: 'relative',
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alignItems: 'center',
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justifyContent: 'center',
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},
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trail: {
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borderRadius: CIRCLE_SIZE,
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position: 'absolute',
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left: 0,
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top: 0,
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bottom: 0,
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width: '100%',
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},
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grab: {
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position: 'absolute',
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left: -INVISIBLE_BORDER,
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top: -INVISIBLE_BORDER,
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alignItems: 'center',
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justifyContent: 'center',
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height: GRAB_SIZE,
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width: GRAB_SIZE,
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},
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circle: {
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height: CIRCLE_SIZE,
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width: CIRCLE_SIZE,
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borderRadius: CIRCLE_SIZE,
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},
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icon: {
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opacity: 0,
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position: 'absolute',
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left: 0,
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top: 0,
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bottom: 0,
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right: 0,
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alignItems: 'center',
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justifyContent: 'center',
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},
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container: {
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// Styles for the swipe container
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},
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circle: {
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// Styles for the swipe circle
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},
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});
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export default memo(SwipeToConfirm);

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