问题描述
在下面的简单 Flex 4 Web 应用程序中 -
In the simple Flex 4 web application below -
是否可以更改自定义项渲染器 MyRenderer
,使其包含太长的行?
is it possible to change the custom item renderer MyRenderer
, so that it wraps the too long lines?
TestApp.mxml:
<?xml version="1.0" encoding="utf-8"?>
<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.ArrayList;
private static const MONTHS:ArrayList = new ArrayList([
"1 January is a beautyful month",
"2 February is a beautyful month",
"3 March is a beautyful month",
"4 April is a beautyful month",
"5 May is a beautyful month",
"6 June is a beautyful month",
"7 July is a beautyful month",
"8 August is a beautyful month",
"9 September is a beautyful month",
"10 October is a beautyful month",
"11 November is a beautyful month",
"12 December is a beautyful month"
]);
]]>
</fx:Script>
<s:List id="myList"
width="60"
dataProvider="{MONTHS}"
itemRenderer="MyRenderer" />
</s:Application>
MyRenderer.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:s="library://ns.adobe.com/flex/spark"
autoDrawBackground="false">
<fx:Script>
<![CDATA[
[Bindable]
public var myColor:uint = 0xFFFFFF;
override public function set label(value:String):void
{
super.label = value;
labelDisplay.text = label;
// var list:List = owner as List;
// if (list)
// labelDisplay.width = list.width;
if (label.indexOf("June") >= 0)
myColor = 0xFF0000;
else if (label.indexOf("July") >= 0)
myColor = 0x00FF00;
else if (label.indexOf("August") >= 0)
myColor = 0x0000FF;
else
myColor = 0xFFFFFF;
}
]]>
</fx:Script>
<s:Rect width="100%" height="100%">
<s:fill>
<s:SolidColor color="{myColor}" />
</s:fill>
</s:Rect>
<s:Label id="labelDisplay" />
</s:ItemRenderer>
更新 2:
我需要与 创建行高可变的多行列表行 博客 - 但对于 spark.components.List 不再具有 wordWrap
属性.
I need same as in the Creating multi-line list rows with variable row heights blog - but for the spark.components.List which doesn't have the wordWrap
property anymore.
更新 3:
实际上在 RIAStar 回答了我的问题之后(谢谢!),我的问题才刚刚开始 - 当我现在调用 myList.ensureIndexIsVisible(MONTHS.length - 1);
它并没有真正滚动到底部.
Actually after RIAStar answered my question (thanks!), my problems have just started - when I now call the myList.ensureIndexIsVisible(MONTHS.length - 1);
it doesn't really scroll to the bottom.
我准备了一个新问题:带有多行(自动换行)项目渲染器的列表 - 如何滚动到底部?附测试用例和截图
推荐答案
您可以使用 VerticalLayout 的 variableRowHeight 属性.像这样:
You can use VerticalLayout's variableRowHeight property for that. Something like this:
<s:List id="myList" width="60" dataProvider="{MONTHS}" itemRenderer="MyRenderer">
<s:layout>
<s:VerticalLayout variableRowHeight="true"
horizontalAlign="justify"
requestedMinRowCount="5"/>
</s:layout>
</s:List>
此外,ItemRenderer 中的 Label 可以占据它想要的所有水平空间.你应该限制它的width
.例如:
Furthermore, the Label in your ItemRenderer can take up all the horizontal space it wants. You should constrain its width
. For example:
<s:Label width="100%"/>
这篇关于spark.components.List 的多行 itemRenderer - 带有测试用例和屏幕截图的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!