react-native-gesture-handler/lib/module/web_hammer/PinchGestureHandler.js

Declarative API exposing native platform touch and gesture system to React Native

import Hammer from '@egjs/hammerjs';
import IndiscreteGestureHandler from './IndiscreteGestureHandler';

class PinchGestureHandler extends IndiscreteGestureHandler {
  get name() {
    return 'pinch';
  }

  get NativeGestureClass() {
    return Hammer.Pinch;
  }

  transformNativeEvent({
    scale,
    velocity,
    center
  }) {
    return {
      focalX: center.x,
      focalY: center.y,
      velocity,
      scale
    };
  }

}

export default PinchGestureHandler;
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