add plot event

modules/event/EventType.js

   RESET_TIME_LINE: 'restTimeLine'
 }
 
+const PlotEventType = {
+  DARW_START: 'drawStart',
+  DARW_MOVING: 'drawMoving',
+  DARW_END: 'drawEnd',
+  EDIT_START: 'drawStart',
+  EDIT_MOVING: 'drawMoving',
+  ANCHOR_MOVING: 'anchorMoving',
+  EDIT_END: 'editEnd'
+}
+
 export {
   MouseEventType,
   ViewerEventType,
   LayerEventType,
   OverlayEventType,
   TrackEventType,
-  PathEventType
+  PathEventType,
+  PlotEventType
 }

modules/event/index.js

  */
 export { default as TrackEvent } from './type/TrackEvent'
 export { default as PathEvent } from './type/PathEvent'
+
+/**
+ * plot
+ */
+export { default as PlotEvent } from './type/PlotEvent'

modules/event/type/PlotEvent.js

+/**
+ * @Author: Caven
+ * @Date: 2020-05-11 23:28:13
+ */
+
+import { Cesium } from '@dc-modules/namespace'
+import { PlotEventType } from '../EventType'
+import Event from '../Event'
+
+class PlotEvent extends Event {
+  constructor() {
+    super()
+  }
+
+  /**
+   *
+   * @private
+   */
+  _registerEvent() {
+    Object.keys(PlotEventType).forEach(key => {
+      let type = PlotEventType[key]
+      this._cache[type] = new Cesium.Event()
+    })
+  }
+}
+
+export default PlotEvent