I need to do the following implementation in React Native: http://jsfiddle.net/t8mzLuh4/3/
But I can't think of the most optimal way to do it, I have tried different ways, but they have not been optimal.
I am trying to implement a screen where there are 3 sliders, and I want to make the combined total of the 3 sliders never go over the maximum.
I don't care how it is implemented, it can be from a starting 0, and as soon as I change 1 slider, the remaining total available decreases or putting a slider beyond the maximum, decreases the values on the other sliders.
This is my current implementation of the slider with reanimated 2
const Slider = ({
label,
min,
value,
labelAmount,
colorAmount,
max,
currency,
onChange,
step,
}: SliderProps) => {
const isActive = useSharedValue(false);
const translationX = useSharedValue(((width - PADDING * 2) * 0) / max);
const amount = useSharedValue(value);
const formattedAmount = useSharedValue(
formatAsMoney(value, currency ?? '$')
);
const wrapper = (value: number) => {
formattedAmount.value = formatAsMoney(value, currency ?? '$');
};
useDerivedValue(() => {
runOnJS(wrapper)(amount.value);
});
const onSelect = (value: number) => {
'worklet';
runOnJS(onChange)(value);
};
const onGestureEvent = useAnimatedGestureHandler({
onStart: () => {
isActive.value = true;
},
onActive: (event) => {
translationX.value = interpolate(
event.x,
[0, width],
[0 - RADIUS, width - PADDING],
Extrapolate.CLAMP
);
amount.value =
Math.ceil(
interpolate(
translationX.value,
[0 - RADIUS, width - PADDING * 2 + RADIUS],
[min, max],
Extrapolate.CLAMP
) / step
) * step;
},
onEnd: () => {
isActive.value = false;
onSelect(amount.value);
},
});
const transform = useAnimatedStyle(() => {
const translateX = translationX.value;
return {
transform: [
{ translateX },
{ scale: withSpring(isActive.value ? 1 : 0.75) },
],
};
});
const barWidth = useAnimatedStyle(() => {
return {
width: translationX.value + RADIUS,
};
});
return (
<View>
<View
style={{
flexDirection: "row",
justifyContent="space-between",
alignItems="center"
}}
>
<Text>
{label}
</Text>
<ReText
text={formattedAmount}
style={[
styles.text,
{
fontSize: labelAmount === 'small' ? 18 : 22,
color: '#000',
},
]}
/>
</View>
<View style={styles.shadow}>
<View style={styles.container}>
<View style={styles.barContainer}>
<View
style={[
styles.bar,
{
backgroundColor: '#fff',
},
]}
/>
<Animated.View
style={[
styles.bar,
{
backgroundColor: 'green',
},
barWidth,
]}
/>
</View>
<PanGestureHandler {...{ onGestureEvent }}>
<Animated.View
style={[
StyleSheet.absoluteFillObject,
{
marginHorizontal: PADDING / 2,
},
]}
>
<Animated.View
style={[styles.cursor, transform, styles.shadow]}
/>
</Animated.View>
</PanGestureHandler>
</View>
<View
style={{
alignSelf: "flex-start",
flexDirection: "row",
justifyContent: "space-between",
alignItems: "center",
width: "100%"
}}
>
<Text >
{formatAsMoney(min, currency ?? '$')}
</Text>
<Text>
{formatAsMoney(max, currency ?? '$')}
</Text>
</View>
</View>
</View>
);
};
const useStyles = StyleSheet.create({
shadow: {
shadowColor: '#000',
shadowOffset: {
width: 0,
height: 2,
},
shadowOpacity: 0.25,
shadowRadius: 3.84,
elevation: 5,
alignItems: 'center',
},
container: {
height: HEIGHT,
width: width,
alignItems: 'center',
justifyContent: 'center',
},
barContainer: {
height: BAR_HEIGHT,
width: width - PADDING,
},
bar: {
borderRadius: BORDER_RADIUS,
...StyleSheet.absoluteFillObject,
},
cursor: {
height: RADIUS * 2,
width: RADIUS * 2,
borderRadius: RADIUS,
backgroundColor: 'white',
},
text: {
fontWeight: '700',
},