114 lines
3.4 KiB
TypeScript
114 lines
3.4 KiB
TypeScript
import { useRef, useState } from 'react';
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import { View, Text, PanResponder, Animated, StyleSheet } from 'react-native';
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const TRACK_HEIGHT = 58;
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const HANDLE_SIZE = 46;
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const PADDING = 6;
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const THRESHOLD = 0.85; // 85% of track = confirmed
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interface Props {
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label?: string;
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color?: string;
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onConfirm: () => void;
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disabled?: boolean;
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}
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export function SlideToConfirm({ label = 'Slide to confirm', color = '#059669', onConfirm, disabled = false }: Props) {
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const pan = useRef(new Animated.Value(0)).current;
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const [done, setDone] = useState(false);
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const [trackW, setTrackW] = useState(0);
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const maxX = trackW - HANDLE_SIZE - PADDING * 2;
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const panResponder = useRef(
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PanResponder.create({
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onStartShouldSetPanResponder: () => !disabled && !done,
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onStartShouldSetPanResponderCapture: () => !disabled && !done,
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onMoveShouldSetPanResponder: () => !disabled && !done,
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onMoveShouldSetPanResponderCapture: () => !disabled && !done,
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onPanResponderMove: (_, gs) => {
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const x = Math.max(0, Math.min(gs.dx, maxX));
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pan.setValue(x);
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},
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onPanResponderRelease: (_, gs) => {
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const x = Math.max(0, Math.min(gs.dx, maxX));
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if (maxX > 0 && x / maxX >= THRESHOLD) {
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// Snap to end + confirm
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Animated.timing(pan, { toValue: maxX, duration: 120, useNativeDriver: false }).start(() => {
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setDone(true);
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onConfirm();
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});
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} else {
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// Snap back
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Animated.spring(pan, { toValue: 0, useNativeDriver: false, speed: 20 }).start();
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}
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},
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})
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).current;
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// Interpolate opacity of the label as handle moves right
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// Guard: inputRange must be monotonically non-decreasing (maxX could be 0 before layout)
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const safeMax = Math.max(maxX * 0.5, 1);
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const labelOpacity = pan.interpolate({
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inputRange: [0, safeMax],
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outputRange: [1, 0],
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extrapolate: 'clamp',
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});
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return (
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<View
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onLayout={e => setTrackW(e.nativeEvent.layout.width)}
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style={[styles.track, { backgroundColor: done ? color : '#F1F5F9', borderColor: done ? color : '#E2E8F0' }]}
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>
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{/* Label */}
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<Animated.Text style={[styles.label, { opacity: disabled ? 0.4 : labelOpacity, color: done ? '#fff' : '#64748B' }]}>
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{done ? '✓ Confirmed!' : label}
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</Animated.Text>
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{/* Handle */}
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{!done && (
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<Animated.View
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{...(disabled ? {} : panResponder.panHandlers)}
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style={[
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styles.handle,
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{ backgroundColor: disabled ? '#CBD5E1' : color, left: PADDING, transform: [{ translateX: pan }] },
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]}
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>
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<Text style={{ color: '#fff', fontSize: 20, fontWeight: '700' }}>{'›'}</Text>
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</Animated.View>
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)}
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</View>
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);
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}
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const styles = StyleSheet.create({
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track: {
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height: TRACK_HEIGHT,
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borderRadius: TRACK_HEIGHT / 2,
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borderWidth: 1.5,
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justifyContent: 'center',
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alignItems: 'center',
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overflow: 'hidden',
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position: 'relative',
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},
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label: {
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fontSize: 15,
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fontWeight: '700',
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letterSpacing: 0.3,
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},
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handle: {
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position: 'absolute',
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top: PADDING,
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width: HANDLE_SIZE,
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height: HANDLE_SIZE,
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borderRadius: HANDLE_SIZE / 2,
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alignItems: 'center',
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justifyContent: 'center',
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elevation: 3,
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shadowColor: '#000',
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shadowOffset: { width: 0, height: 2 },
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shadowOpacity: 0.15,
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shadowRadius: 4,
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},
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});
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