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package com.cattsoft.oss.util.ui.flex.graphkit.component
{
import flash.events.Event;
import mx.collections.ArrayCollection;
import mx.controls.ComboBox;
/**
* @file_name FilterComboBox.as
* @author chenjh
* @date 2008-11-14 14:03:00
* @description 可以根据用户输入过滤选项的ComboBox
*/
public class FilterComboBox extends ComboBox
{
public function FilterComboBox()
{
super ();
this .editable = true ;
}
override protected function textInput_changeHandler(event:Event): void {
super .textInput_changeHandler(event);
FilterByKey(event);
}
// 过滤数据
private function FilterByKey(event:Event): void {
var tempDataProvider:ArrayCollection = this .dataProvider as ArrayCollection;
if (tempDataProvider == null ) return ;
this .dataProvider.filterFunction = filterFunction;
var tempstr:String = this .text;
if (tempDataProvider.refresh()){
this .dropdown.selectedIndex = - 1 ;
this .dropdown.verticalScrollPosition = 0 ;
this .text = tempstr;
this .open();
this .textInput.setFocus();
this .textInput.setSelection(tempstr.length,tempstr.length);
}
}
private function filterFunction(item:Object):Boolean{
return item[ ' label ' ].toString().indexOf( this .text) !=- 1 ;
}
}