LongPressGestureHandler.js

import Hammer from 'hammerjs';

import State from '../State';
import PressGestureHandler from './PressGestureHandler';
import { isnan } from './utils';

class LongPressGestureHandler extends PressGestureHandler {
  get minDurationMs() {
    return isnan(this.config.minDurationMs) ? 251 : this.config.minDurationMs;
  }

  get maxDist() {
    return isnan(this.config.maxDist) ? 9 : this.config.maxDist;
  }

  updateHasCustomActivationCriteria({ maxDistSq }) {
    return !isnan(maxDistSq);
  }

  getConfig() {
    if (!this._hasCustomActivationCriteria) {
      // Default config
      // If no params have been defined then this config should emulate the native gesture as closely as possible.
      return {
        shouldCancelWhenOutside: true,
        maxDistSq: 10,
      };
    }
    return this.config;
  }

  getHammerConfig() {
    return {
      ...super.getHammerConfig(),
      // threshold: this.maxDist,
      time: this.minDurationMs,
    };
  }

  getState(type) {
    return {
      [Hammer.INPUT_START]: State.ACTIVE,
      [Hammer.INPUT_MOVE]: State.ACTIVE,
      [Hammer.INPUT_END]: State.END,
      [Hammer.INPUT_CANCEL]: State.FAILED,
    }[type];
  }
}

export default LongPressGestureHandler;