MapGIS Client for JavaScript API

import { LayerView } from './index'

class BaseRendererLayerView extends LayerView {
  constructor(options) {
    super(options)
    this._initInstance(options)
    this._initHandlers()
  }

  /**
   * @description: 初始化实例
   * @return {*}
   */
  _initInstance(options) {}

  /**
   * @description: 初始化监听
   * @return {*}
   */
  _initHandlers() {
    this._layerChangeAction = this._layerChangeAction.bind(this)
    this.layer.on('set', this._layerChangeAction)
  }

  /**
   * @description: 移除监听
   * @return {*}
   */
  _removeHandlers() {
    this.layer.off('set', this._layerChangeAction)
  }

  /**
   * @description: 图层变化action
   * @param {*} event
   * @return {*}
   */
  _layerChangeAction(event) {
    const { key } = event.eventData
    if (key === 'renderer') {
      this._rendererChangeAction(event)
    }
  }

  /**
   * @description: renderer变化action
   * @param {*} event
   * @return {*}
   */
  _rendererChangeAction(event) {}

  /**
   * 移除图层视图
   * @param {LayerEvent} 图层事件
   * @return {Promise<LayerView>} 图层视图
   */
  onRemove(event) {
    super.onRemove(event)
    this._removeHandlers()
  }
}

export default BaseRendererLayerView