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JoBerkner/panGesture.js

Created July 31, 2020 05:03
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callback functions for the pan gesture handler
Raw
panGesture.js
const panStateHandler = event => {
if (event.nativeEvent.oldState === State.UNDETERMINED) {
setLastTranslateX(translateX);
setLastTranslateY(translateY);
};
};
const panGestureHandler = event => {
setTranslateX(-event.nativeEvent.translationX / scale + lastTranslateX);
setTranslateY(-event.nativeEvent.translationY / scale + lastTranslateY);
};
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