FLEX--仿Google联想框效果
首先是事件源，也就是从何而起，如下的一个输入框：
<mx:FormItem label="集团客户:" width="42%"> <!--change1--> <mx:TextInput id="txtAssociation" width="235" maxChars="32" change="associate();"/> </mx:FormItem>
然后就是处理效果，这些内容都是从数据库得到的数据，动态的查出的。
import mx.collections.ArrayCollection; import mx.events.FlexMouseEvent; import mx.events.ListEvent; import mx.managers.PopUpManager; import resources.com.list.Association; // 经过渲染的联想结果List private var list:Association; // 临时字符串,用于判断当keyUp事件发生时,联想框的值是否发生改变,如未改变则不联想 private var temp:String = ''; private function changeAssociation():void{ temp=''; txtAssociation.text=''; associationResult=null; if(list != null){ PopUpManager.removePopUp(list); list = null; // 清空临时字符串 } } private function associate():void { var str:String = txtAssociation.text; if(str.length<2){ associationResult=null; } if (str != temp) { if(str.length < 2){ if(list != null){ PopUpManager.removePopUp(list); list = null; // 清空临时字符串 temp = ''; } return; } temp = str; var params:Object = {}; params['areaNO'] = cbxArea.selectedItem.data; params['netType'] = cbxNetType.selectedItem.data; params['str'] = str; params['handle'] = 'associate'; service4association.send(params); } } private function openAssociation():void { if(service4association.lastResult.items != null) createAndShow(service4association.lastResult.items.item); else if(list != null){ PopUpManager.removePopUp(list); list = null; // 清空临时字符串 temp = ''; } } private function createAndShow(dp:Object):void { // 每次打开联想框以前, 先清理缓存 if(list != null){ // 将联想框从PopUpManager中移除 PopUpManager.removePopUp(list); // 清空联想框实例 list = null; } list = new Association(); //指定数据源 list.dataProvider = dp; //获取鼠标坐标并赋值给list list.x = txtAssociation.x + 219; list.y = txtAssociation.y + 205; //大小 list.minWidth = 400; list.maxHeight = 270; //注册list外鼠标按下和项目单击事件 list.addEventListener(FlexMouseEvent.MOUSE_DOWN_OUTSIDE, mouseDownOutsideHandler); list.addEventListener(ListEvent.ITEM_CLICK, itemClik); //弹出并显示list PopUpManager.addPopUp(list, this, false); } private var associationResult:Object; private function itemClik(event:ListEvent):void{ associationResult = ArrayCollection(Association(event.target).dataProvider).getItemAt(event.rowIndex); txtAssociation.text = associationResult.label; //Alert.show(associationResult.data); removePopUpIDisplay(Association(event.target)); } private function mouseDownOutsideHandler(event:MouseEvent):void{ removePopUpIDisplay(Association(event.target)); } private function removePopUpIDisplay(obj:Association):void{ // 清空临时字符串 temp = ''; obj.removeEventListener(FlexMouseEvent.MOUSE_DOWN_OUTSIDE, mouseDownOutsideHandler); PopUpManager.removePopUp(obj); } /**--------------------------联想-------------------------------**/
还有一个类，这里也贴出来吧。呵呵，共享原则，完全可实现。
<?xml version="1.0" encoding="utf-8"?> <mx:List xmlns:mx="http://www.adobe.com/2006/mxml" initialize="initApp();" xmlns:filters="flash.filters.*" alternatingItemColors="[#EEEEEE, white]" buttonMode="true" > <mx:Script> <!--[CDATA[ private function initApp():void{ showEffect.play(); } ]]--> </mx:Script> <mx:itemRenderer> <mx:Component> <mx:HBox horizontalGap="0" paddingLeft="5"> <mx:Image source="@Embed('resources/icons/building.png')"/> <mx:Text text="{data.prefix}" paddingLeft="5"/> <mx:Text text="{data.str}" color="green"/> <mx:Text text="{data.suffix}"/> </mx:HBox> </mx:Component> </mx:itemRenderer> <mx:Parallel id="showEffect" target="{this}" duration="300"> <mx:Fade /> <mx:WipeDown /> </mx:Parallel> </mx:List>
FLEX--仿Google联想框效果--现在好多地方都用到了这样的效果,当然,现在Google下线了,不让用了,但是跟网上说的一样,想办法,它还是能出来的.呵呵,不过对于我们没有多少必要了.这里在Flex当中也是为了能够更好的实现查询效果.所以也要求做这么一个,动态查询.