Ext Combox模糊匹配扩展

MyComboBox = Ext.extend(Ext.form.ComboBox, {
  initList            : function(){
   MyComboBox.superclass.initList.call(this);
   if(this.clearable){
          var combox = this;
          var cls = 'x-combo-list';
    this.footer = this.list.createChild({
     cls           : cls + '-ft'
    }); 
    this.spaceR = new Ext.Toolbar({     
     items          : [
      '->',
      {
       iconCls        : 'bico_btnqk', 
       text        : '清空',
       handler        : function(){
        combox.setText('','');
        combox.collapse();
       }
      }
     ],
     renderTo         : this.footer
    });
    this.assetHeight += this.footer.getHeight();
   }
   this.store.load();
  },
  
  setText             : function(text, value){
   this.lastSelectionText = text;
   if(this.hiddenField){
             this.hiddenField.value = value;
         }
         Ext.form.ComboBox.superclass.setValue.call(this, text);
         this.value = value;
     },
    
     getValue             : function(){
      return typeof this.value != 'undefined' ? this.value : '';
     },
    
     getText             : function(){
      return typeof this.lastSelectionText != 'undefined' ? this.lastSelectionText : '';
     },
    
     doQuery             : function(q, forceAll){
      if(q === undefined || q === null){
             q = '';
         }
         var qe = {
             query           : q,
             forceAll          : forceAll,
             combo           : this,
             cancel           : false
         };
         if(this.fireEvent('beforequery',qe) === false || qe.cancel){
             return false;
         }
         q = qe.query;
         forceAll = qe.forceAll;
         if(forceAll === true || (q.length >= this.minChars)){
          if (this.editable === true){
     this.store.baseParams[this.queryParam] = q;
     this.store.load({
      params: this.getParams(q)
     });
     this.expand();
          }else{
           if(this.lastQuery !== q){
                  this.lastQuery = q;
                  if(this.mode == 'local'){
                      this.selectedIndex = -1;
                      if(forceAll){
                          this.store.clearFilter();
                      }else{
                          this.store.filter(this.displayField, q);
                      }
                      this.onLoad();
                  }else{
                      this.store.baseParams[this.queryParam] = q;
                      this.store.load({
                          params: this.getParams(q)
                      });
                      this.expand();
                  }
              }else{
                  this.selectedIndex = -1;
                  this.onLoad();
              }
          }
         }
     },
     listeners              : { 
            'beforequery'           : function(e){ 
    var combo = e.combo;   
    if(!e.forceAll){   
     var input = e.query;   
     // 检索的正则  
     var regExp = new RegExp(".*" + input + ".*"); 
     // 执行检索  
     combo.store.filterBy(function(record,id){   
      // 得到每个record的项目名称值  
      var text = record.get(combo.displayField);   
      return regExp.test(text);  
     }); 
     combo.expand();   
     return false; 
    } 
            }
        }
 });
 
 var qMaterielInfoStore = new Ext.data.JsonStore({
  url                          : '../../../dfo/com_web/sys/Common/getMaterielInfo.do',
  root                         : 'ROOT',
  totalProperty                : 'TOTALCOUNT',
  id                           : 'materielid',
  fields                       : ['materielid','shortname','objecttype'],
  sortInfo                     : {field : 'materielid', direction : 'ASC'},
  baseParams               : {
   'objecttype'             : "0",
   'dataFields'             : escape('materielid,shortname,objecttype')
  }
 });
 
 var qMaterielInfo = new MyComboBox({
  id               : 'qMaterielInfo',
  name              : 'qMaterielInfo',
  fieldLabel             : '物料名称',
  store              : qMaterielInfoStore,
  valueField              : 'materielid',
  displayField             : 'shortname',
  lazyRender             : true,
  triggerAction            : 'all',
  anchor              : '100%',
  editable             : true,
  clearable               : true
 });