Flex 4 DropDownList
Flex 4 DropDownList:
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the Spark DropDownList control -->
<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">
<fx:Script>
<!--[CDATA[
import mx.collections.ArrayCollection;
import spark.events.IndexChangeEvent;
[Bindable]
public var myDP:ArrayCollection = new ArrayCollection(
[ {product:"Flex", price:100},
{product:"Air", price:200},
{product:"Catalyst", price:300},
{product:"FlashBuilder", price:400} ]);
private function updateSelection(e:IndexChangeEvent):void
{
currSel.text = "Current Product = " + myDDL.selectedItem.product;
currPrc.text = "Price = $" + myDDL.selectedItem.price;
}
]]>
</fx:Script>
<s:Panel width="75%" height="75%" title="My DropDownList Example"
horizontalCenter="0" verticalCenter="0">
<s:VGroup left="10" right="10" top="10" bottom="10">
<!-- Text components used to display current selection and price -->
<s:Label id="currSel" text="Current Product = -"/>
<s:Label id="currPrc" text="Price = $ -"/>
<!-- DropDownList will call the updateSelection function when the
selectionChanged event is dispatched -->
<s:DropDownList id="myDDL" prompt="Select One"
width="200" dataProvider="{myDP}"
labelField="product"
change="updateSelection(event);"/>
</s:VGroup>
</s:Panel>
</s:Application>
DropDownList 动态定位
从remote取回数据后，动态定位到
<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the Spark DropDownList control -->
<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"
相关文档：
一、
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
addedToStage="stage.addEventListener(KeyboardEvent.KEY_DOWN, myKeyDown)"
click="clickEvt(event)"
layout="absolute"
&nb ......
对flex datagrid scrollbar位置设置需要一些特殊处理，见如下截图：
关键点在于DataGrid拥有protected的 horizontalScrollBar 和 verticalScrollBar 属性，对其设置即可实现如上截图的效果。代码如下： package com.util.component
{
import mx.controls.DataGrid;
import mx.events.DataGridEvent;
import mx ......
概要
当我们加载外部swf时，必须要了解应用程序域(Application Domain)。从Adobe官方文件中，我们可以得知应用程序域能够把处于同一个安全域(Security Domain)中的类分离开，这样就可以让一个类的多个定义共存，或是让多个子应用来共享父应用的类定义。简单点理解就是应用程序域为类定义提供了分区功能。
应用程序域
� ......
1.拷贝内容到剪贴板：
System
.
setClipboard
(
strContent)
;
2.克隆一个 ArrayCollection ：
var
bar:
ArrayCollection = new
ArrayCollection(
)
;
for
each
(
var
i:
Object
in
ac )
{
bar.
addItem(
i )
;
}
var
bar:
ListCollectionVie ......
