/*
 * @Author: 秦少卫
 * @Date: 2022-09-03 19:16:55
 * @LastEditors: 秦少卫
 * @LastEditTime: 2022-09-04 00:01:00
 * @Description: 自定义事件
 */

import EventEmitter from 'events'

class EventHandle extends EventEmitter {
  init(handler) {
    this.handler = handler
    this.handler.on('selection:created', (e) => this._selected(e))
    this.handler.on('selection:updated', (e) => this._selected(e))
    this.handler.on('selection:cleared', (e) => this._selected(e))
  }

  // 暴露单选多选事件
  _selected(e) {
    const actives = this.handler.getActiveObjects()
    if (actives && actives.length === 1) {
      this.emit('selectOne', actives)
    } else if (actives && actives.length > 1) {
      this.mSelectMode = 'multiple'
      this.emit('selectMultiple', actives)
    } else {
      this.emit('selectCancel')
    }
  }
}

export default EventHandle