Class MetaObject

src/scripting/api/Runtime/Runtime.ts:46–107

* Meta object that serves only to receive and send events

   * Meta object that serves only to receive and send events
   */
  class MetaObject implements RegisterableObject, Listenable {
    private _name:string;
    private _listeners:{[name:string]: Array<Function>} = {};

    constructor(name:string) {
      if (name.slice(0, 2) !== '__') {
        throw new Error('MetaObject names must start with two underscores.');
      }
      this._name = name;
    }

    public addEventListener(event:string,
      listener:Function,
      useCapture:boolean = false,
      priority:number = 0):void {

      if (!(event in this._listeners)) {
        this._listeners[event] = [];
      }
      this._listeners[event].push(listener);
    }

    public removeEventListener(event:string,
      listener:Function,
      useCapture:boolean = false):void {

      if (!(event in this._listeners)) {
        return;
      }
      var index = this._listeners[event].indexOf(listener)
      if (index >= 0) {
        this._listeners[event].splice(index, 1);
      }
    }

    public hasEventListener(event:string):boolean {
      return event in this._listeners && this._listeners[event].length > 0;
    }

    public dispatchEvent(event:string, data?:any):void {
      if (!(event in this._listeners)) {
        return; // Ignore
      }
      for (var i:number = 0; i < this._listeners[event].length; i++) {
        this._listeners[event][i](data);
      }
    }

    public getId():string {
      return this._name;
    }

    public serialize():Object {
      return {
        "class":this._name
      };
    }