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

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

"use strict";

import Hammer from '@egjs/hammerjs';
import { DEG_RAD } from './constants';
import IndiscreteGestureHandler from './IndiscreteGestureHandler';
class RotationGestureHandler extends IndiscreteGestureHandler {
  get name() {
    return 'rotate';
  }
  get NativeGestureClass() {
    return Hammer.Rotate;
  }
  transformNativeEvent({
    rotation,
    velocity,
    center
  }) {
    return {
      rotation: (rotation - (this.initialRotation ?? 0)) * DEG_RAD,
      anchorX: center.x,
      anchorY: center.y,
      velocity
    };
  }
}
export default RotationGestureHandler;
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