text: ///////////////////////////////////////////////////////////////////////////
  // Copyright © Esri. All Rights Reserved.
  //
  // Licensed under the Apache License Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //    http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  ///////////////////////////////////////////////////////////////////////////
  
  define(['dojo/_base/declare',
    'dojo/_base/lang',
    'dojo/_base/html',
    'dijit/_WidgetBase'],
    function (declare, lang, html, _WidgetBase) {
    return declare([_WidgetBase], {
      widget: null,
      baseClass: 'jimu-widget-frame jimu-container',
  
      postCreate: function(){
        this.inherited(arguments);
        if(!this.containerNode){
          this.containerNode = this.domNode;
        }
        if(this.widget){
          this.setWidget(this.widget);
        }
      },
  
      startup: function(){
        this.inherited(arguments);
        if(this.widget){
          this.widget.startup();
        }
      },
  
      resize: function(){
        if(this.widget && this.widget.state !== 'closed' &&
          lang.isFunction(this.widget.resize)){
          this.widget.resize();
        }
      },
  
      setLoading: function(_loading){
        this.loading = _loading;
        this.loading.placeAt(this.containerNode);
      },
  
      getWidget: function(){
        return this.widget;
      },
  
      setWidget: function(w){
        this.widget = w;
        if(this.loading){
          this.loading.destroy();
        }
        html.place(w.domNode, this.containerNode);
        this.resize();
      },
  
      destroy: function(){
        if(this.widget && this.widget.domNode){
          try{
            this.widget.destroy();
          }catch(error){
            console.error('destroy widget error. widget: [' + this.widget.uri + '], ' + error.stack);
          }
        }
        if(this.loading && this.loading.domNode){
          this.loading.destroy();
        }
      }
  
    });
  });