Thanks a bunch, that's exactly what I needed, here's how the code ended
up.
Mark
<mx:verticalAxisRenderer>
<mx:AxisRenderer>
<mx:labelRenderer>
<mx:Component>
<mx:Label toolTip="{this.myTip}" >
<mx:Script>
<![CDATA[
[Bindable]
private var myTip:String;
override public function set data(value:Object):void{
if(value == null)
return;
myTip = value.text;
var length:int =
value.text.toString().length;
if (length > 20){
text = value.text.toString().substr(0, 20) + "...";
} else {
text = value.text;
}
}
]]>
</mx:Script>
</mx:Label>
</mx:Component>
</mx:labelRenderer>
</mx:AxisRenderer>
</mx:verticalAxisRenderer>