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Optimize Marquee Animation with Focus Detection #11

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Optimize Marquee Animation with Focus Detection #11

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16 changes: 15 additions & 1 deletion src/index.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@ import Animated, {
useSharedValue,
withDecay,
} from 'react-native-reanimated';
import {useFocusEffect} from '@react-navigation/native';


type MarqueeDirection = 'horizontal' | 'vertical';
export type MarqueeProps = React.PropsWithChildren<{
Expand Down Expand Up @@ -105,7 +107,7 @@ export const Marquee = React.memo(
});
const [cloneTimes, setCloneTimes] = React.useState(0);
const anim = useSharedValue(0);

const frameRateMs = frameRate ? 1000 / frameRate : null;

const frameCallback = useFrameCallback((frameInfo) => {
Expand Down Expand Up @@ -197,6 +199,18 @@ export const Marquee = React.memo(
);
});

// detect focus
useFocusEffect(
React.useCallback(() => {
frameCallback.setActive(true);

return () => {
frameCallback.setActive(false);
anim.value = 0;
};
}, []),
);

return (
<Animated.View
key={direction}
Expand Down