react-native-gesture-handler#GestureDetector TypeScript Examples

The following examples show how to use react-native-gesture-handler#GestureDetector. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: ProgressBar.tsx    From jellyfin-audio-player with MIT License 4 votes vote down vote up 
function ProgressBar() {
    const { position, buffered, duration } = useProgress();

    const width = useSharedValue(0);
    const pos = useSharedValue(0);
    const buf = useSharedValue(0);
    const dur = useSharedValue(0);

    const isDragging = useSharedValue(false);
    const offset = useSharedValue(0);

    const bufferAnimation = useDerivedValue(() => {
        return calculateProgressTranslation(buf.value, dur.value, width.value);
    }, [[dur, buf, width.value]]);

    const progressAnimation = useDerivedValue(() => {
        if (isDragging.value) {
            return calculateProgressTranslation(offset.value, width.value, width.value);
        } else {
            return calculateProgressTranslation(pos.value, dur.value, width.value);
        }
    });

    const timePassed = useDerivedValue(() => {
        if (isDragging.value) {
            const currentPosition = (offset.value - DRAG_HANDLE_SIZE / 2) / (width.value - DRAG_HANDLE_SIZE) * dur.value;
            return getMinutes(currentPosition) + ':' + getSeconds(currentPosition);
        } else {
            return getMinutes(pos.value) + ':' + getSeconds(pos.value);
        }
    }, [pos]);

    const timeRemaining = useDerivedValue(() => {
        if (isDragging.value) {
            const currentPosition = (offset.value - DRAG_HANDLE_SIZE / 2) / (width.value - DRAG_HANDLE_SIZE) * dur.value;
            const remaining = (currentPosition - dur.value) * -1;
            return `-${getMinutes(remaining)}:${getSeconds((remaining))}`;
        } else {
            const remaining = (pos.value - dur.value) * -1;
            return `-${getMinutes(remaining)}:${getSeconds((remaining))}`;
        }
    }, [pos, dur]);
    
    const pan = Gesture.Pan()
        .minDistance(1)
        .activeOffsetX(1)
        .activeOffsetY(1)
        .onBegin((e) => {
            isDragging.value = true;
            offset.value = Math.min(Math.max(DRAG_HANDLE_SIZE / 2, e.x), width.value - DRAG_HANDLE_SIZE / 2);
        }).onUpdate((e) => {
            offset.value = Math.min(Math.max(DRAG_HANDLE_SIZE / 2, e.x), width.value - DRAG_HANDLE_SIZE / 2);
        }).onFinalize(() => {
            pos.value = (offset.value - DRAG_HANDLE_SIZE / 2) / (width.value - DRAG_HANDLE_SIZE) * dur.value;
            isDragging.value = false;
            runOnJS(TrackPlayer.seekTo)(pos.value);
        });
    const tap = Gesture.Tap()
        .onBegin((e) => {
            isDragging.value = true;
            offset.value = Math.min(Math.max(DRAG_HANDLE_SIZE / 2, e.x), width.value - DRAG_HANDLE_SIZE / 2);
        }).onFinalize(() => {
            pos.value = (offset.value - DRAG_HANDLE_SIZE / 2) / (width.value - DRAG_HANDLE_SIZE) * dur.value;
            isDragging.value = false;
            runOnJS(TrackPlayer.seekTo)(pos.value);
        });
    const gesture = Gesture.Exclusive(pan, tap);

    useEffect(() => {
        pos.value = position;
        buf.value = buffered;
        dur.value = duration;
    // eslint-disable-next-line react-hooks/exhaustive-deps
    }, [position, buffered, duration]);

    const dragHandleStyles = useAnimatedStyle(() => {
        return {
            transform: [
                { translateX: offset.value },
                { 
                    scale: withTiming(isDragging.value ? 1 : 0, {
                        duration: 100,
                        easing: Easing.out(Easing.ease),
                    })
                }
            ],
        };
    });

    const bufferStyles = useAnimatedStyle(() => ({
        transform: [
            { translateX: bufferAnimation.value }
        ]
    }));

    const progressStyles = useAnimatedStyle(() => {
        return {
            transform: [
                { translateX: progressAnimation.value }
            ]
        };
    });

    const timePassedStyles = useAnimatedStyle(() => {
        return {
            transform: [
                { translateY: withTiming(isDragging.value && offset.value < 48 ? 12 : 0, {
                    duration: 145,
                    easing: Easing.ease
                }) },
            ],
        };
    });

    const timeRemainingStyles = useAnimatedStyle(() => {
        return {
            transform: [
                { translateY: withTiming(isDragging.value && offset.value > width.value - 48 ? 12 : 0, {
                    duration: 150,
                    easing: Easing.ease
                }) },
            ],
        };
    });

    return (
        <GestureDetector gesture={gesture}>
            <Container onLayout={(e) => { width.value = e.nativeEvent.layout.width; }}>
                <ProgressTrackContainer>
                    <ProgressTrack
                        opacity={0.15}
                    />
                    <ProgressTrack
                        style={bufferStyles}
                        opacity={0.15}
                    />
                    <ProgressTrack
                        style={progressStyles}
                    />
                </ProgressTrackContainer>
                <DragHandle style={dragHandleStyles} />
                <NumberBar style={{ flex: 1 }}>
                    <Number text={timePassed} style={timePassedStyles} />
                    <Number text={timeRemaining} style={timeRemainingStyles} />
                </NumberBar>
            </Container>
        </GestureDetector>
    );
}