Problem
You want to display scroll tips when scrolling the ComboBox control's dropdown menu.
Solution
The following example shows how you can toggle scroll tips on a Flex ComboBox control's dropdown menu by setting the showScrollTips property on the ComboBox control's dropdown property.
Detailed explanation
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/07/01/displaying-scroll-tips-on-a-combobox-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="top"
backgroundColor="white">
<mx:Script>
<![CDATA[
private function init():void {
checkBox.selected = comboBox.dropdown.showScrollTips;
}
private function checkBox_change(evt:Event):void {
comboBox.dropdown.showScrollTips = checkBox.selected;
}
]]>
</mx:Script>
<mx:Array id="arr">
<mx:Object label="One" />
<mx:Object label="Two" />
<mx:Object label="Three" />
<mx:Object label="Four" />
<mx:Object label="Five" />
<mx:Object label="Six" />
<mx:Object label="Seven" />
<mx:Object label="Eight" />
<mx:Object label="Nine" />
<mx:Object label="Ten" />
</mx:Array>
<mx:ApplicationControlBar dock="true">
<mx:Form styleName="plain">
<mx:FormItem label="showScrollTips:">
<mx:CheckBox id="checkBox"
change="checkBox_change(event);" />
</mx:FormItem>
</mx:Form>
</mx:ApplicationControlBar>
<mx:ComboBox id="comboBox"
dataProvider="{arr}"
creationComplete="init();" />
</mx:Application>For more information, see "Displaying scroll tips on a ComboBox control in Flex" at FlexExamples.com.
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