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我正在使用Spark组合框和筛选功能筛选firstName和lastName中的字符。当用户键入“a”时，下拉列表将显示所有已过滤的项目，并在下拉列表中选择“aram，babu”，并在文本输入中显示文本为“aram，babu”。如果用户按下“r”，文本输入显示“aram，babu”，但下拉列表选择消失。点击Enter或点击鼠标下方的鼠标会导致选择错误的项目（最后一项，即“armu，babu”）。spark如果列表更改不显示组合框选择
<?xml version="1.0"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:local="*">
<fx:Script><![CDATA[
import mx.collections.ArrayCollection;
private function labelField(item:Object):String {
if (item && item as SalesPerson && item.lastName && item.firstName) {
return item.firstName + "," + item.lastName;
}
return "";
}
private var arr:ArrayCollection;
private var arr1:ArrayCollection;
private var salesPer:SalesPerson;
private function getData():ArrayCollection
{
arr1 = new ArrayCollection();
var salesPerson:SalesPerson = new SalesPerson();
salesPerson.userName = "ravi kumar";
salesPerson.firstName = "ravi";
salesPerson.lastName = "kumar";
var salesPerson1:SalesPerson = new SalesPerson();
salesPerson1.userName = "kiran kumar";
salesPerson1.firstName = "kiran";
salesPerson1.lastName = "kumar";
var salesPerson2:SalesPerson = new SalesPerson();
salesPerson2.userName = "james bond";
salesPerson2.firstName = "james";
salesPerson2.lastName = "bond";
var salesPerson3:SalesPerson = new SalesPerson();
salesPerson3.userName = "ravi babu";
salesPerson3.firstName = "ravi";
salesPerson3.lastName = "babu";
var salesPerson4:SalesPerson = new SalesPerson();
salesPerson4.userName = "rakesh babu";
salesPerson4.firstName = "rakesh";
salesPerson4.lastName = "babu";
var salesPerson5:SalesPerson = new SalesPerson();
salesPerson5.userName = "ramesh babu";
salesPerson5.firstName = "ramesh";
salesPerson5.lastName = "babu";
var salesPerson6:SalesPerson = new SalesPerson();
salesPerson6.userName = "aram babu";
salesPerson6.firstName = "aram";
salesPerson6.lastName = "babu";
var salesPerson7:SalesPerson = new SalesPerson();
salesPerson7.userName = "armu babu";
salesPerson7.firstName = "armu";
salesPerson7.lastName = "babu";
arr1.addItem(salesPerson);
arr1.addItem(salesPerson1);
arr1.addItem(salesPerson2);
arr1.addItem(salesPerson3);
arr1.addItem(salesPerson4);
arr1.addItem(salesPerson5);
arr1.addItem(salesPerson6);
arr1.addItem(salesPerson7);
return arr1;
}
]]></fx:Script>
<s:VGroup width="100%" height="100%">
<local:FilterCombo labelFunction="labelField" dataProvider="{getData()}"/>
</s:VGroup>
</s:Application>
<?xml version="1.0"?>
<s:ComboBox xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" click="clickHandler(event)">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.collections.IList;
import spark.events.TextOperationEvent;
private var unfilteredDataProvider:IList;
override public function set dataProvider(value:IList):void {
super.dataProvider = value;
unfilteredDataProvider = value;
}
override protected function textInput_changeHandler(event:TextOperationEvent):void {
super.textInput_changeHandler(event);
if (unfilteredDataProvider is ArrayCollection) {
ArrayCollection(unfilteredDataProvider).filterFunction = filterMatches;
ArrayCollection(unfilteredDataProvider).refresh();
super.dataProvider = new ArrayCollection(unfilteredDataProvider.toArray());
}
}
protected function filterMatches(item:Object):Boolean {
if (item && item.lastName && item.firstName) {
if (String(item.lastName + item.firstName).toLowerCase().indexOf(textInput.text.slice(0, textInput.selectionAnchorPosition).toLowerCase()) > -1) {
// trace("traderDoFilter true")
return true;
}
}
return false;
}
private function clickHandler(event:MouseEvent):void {
}
]]>
</fx:Script>
</s:ComboBox>