Question

如何能动态地改变项目内容的大小?

here is my CustomItemRenderer.mxml:

<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" 
                xmlns:s="library://ns.adobe.com/flex/spark">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>

    <fx:Script>
        <![CDATA[
            override public function set data(value:Object):void
            {
                super.data = value;

                invalidateDisplayList();
            }

            private function list_itemRendererFunc(item:Object):void {
                textArea2.setStyle("fontSize",
                                textArea2.getStyle("fontSize") + 2);    
        ]]>
    </fx:Script>
    <s:Label left="10" right="10" top="10" height="25" fontSize="14" maxDisplayedLines="1"
             text="{data.title}" textAlign="center"/>

    <s:TextArea id="textArea2" left="10" right="10" top="35" bottom="10" editable="false"
                fontSize="12" skinClass="spark.skins.mobile.TextAreaSkin"
                text="{data.description }"/>
</s:ItemRenderer>

when a button is pressed i want to access textArea2 and change font size. Can you help me?

Answer 1

在投放器内有约束力的公用车,然后将其束缚起来。象:

<s:TextArea id="textArea2" fontSize="{mypublicvar}" ...

接着,当纽顿受到压力时,就名单的投放人(或数据网)进行争,,并作出改变,使我的公var达到新的价值,例如:

for(var i:int = 0; i < list.dataGroup.numElements; i++)
{
   var itemRendererItem:CustomItemRenderer = list.dataGroup.getElementAt(i) as CustomItemRenderer;
   itemRendererItem.mypublicvar += 2;

   //you can also try
   itemRendererItem.textArea2.setStyle("fontSize",...
}

BTW 我认为,你的名单“项目”是错误的,你应该提出更好的问题。

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