RE: [flexcoders] List Renderer error

[Alex Harui]

You did not specify what the problem is.  Please provide more detail.

 

________________________________

From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
Behalf Of duzengqiang
Sent: Monday, April 21, 2008 8:46 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] List Renderer error

 

I use list.verticalScrollPosition to control items position.
But it does not work well.
Please help me.

Here is the source:
<?xml version="1.0"?>
<!-- Simple example to demonstrate the List Control -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml
<http://www.adobe.com/2006/mxml> ">

<mx:Script>
<![CDATA[
import mx.controls.listClasses.ListBase;
import mx.core.UIComponent;

private var speed:Number = 0; 

private function onEnterFrame(e:Event):void{

var target:ListBase = e.currentTarget as ListBase;
var pos:Number = target.verticalScrollPosition + speed;
//trace(target.verticalScrollPosition + speed +' '+
target.maxVerticalScrollPosition);
if( pos <= 0 ){
target.verticalScrollPosition = 0;
}else if( pos >= target.maxVerticalScrollPosition){
target.verticalScrollPosition =
target.maxVerticalScrollPosition;
}else{
target.verticalScrollPosition = pos;
}

}

private function onMouseMove(e:MouseEvent):void{
e.stopPropagation();
var target:ListBase = e.currentTarget as ListBase;
var p:Point = new Point( e.localX, e.localY );
p = source.globalToLocal( p );
//speed = p.y - target.height / 2;
trace(e.localY)
//speed =( e.localY - 100 )/10;
//trace(speed)
}

private function onMouseOut(e:MouseEvent):void{
speed = 0;
}

]]>
</mx:Script>
<mx:Model id="mystates">
<states>
<state label="0" data="AL"/>
<state label="1" data="AL"/>
<state label="2" data="AL"/>
<state label="3" data="AL"/>
<state label="4" data="AL"/>
<state label="5" data="AL"/>
<state label="6" data="AL"/>
<state label="7" data="AL"/>
<state label="8" data="AL"/>
<state label="9" data="AL"/>
<state label="10" data="AL"/>
<state label="11" data="AL"/>
<state label="12" data="AL"/>
<state label="13" data="AL"/>
<state label="14" data="AL"/>
<state label="15" data="AL"/>
<state label="16" data="AL"/>
<state label="17" data="AL"/>
<state label="18" data="AL"/>
<state label="19" data="AL"/>
<state label="20" data="AL"/>
<state label="21" data="AL"/>
<state label="22" data="AL"/>
<state label="23" data="AL"/>
<state label="24" data="AL"/>
<state label="25" data="AL"/>
<state label="26" data="AL"/>
<state label="27" data="AL"/>
<state label="28" data="AL"/>
<state label="29" data="AL"/>
<state label="30" data="AL"/>
<state label="31" data="AL"/>
<state label="32" data="AL"/>
<state label="33" data="AL"/>
<state label="34" data="AL"/>
<state label="35" data="AL"/>
<state label="36" data="AL"/>
<state label="37" data="AL"/>
<state label="38" data="AL"/>
<state label="39" data="AL"/>
<state label="40" data="AL"/>
<state label="41" data="AL"/>
<state label="42" data="AL"/>
<state label="43" data="AL"/>
<state label="44" data="AL"/>
<state label="45" data="AL"/>
<state label="46" data="AL"/>
<state label="47" data="AL"/>
<state label="48" data="AL"/>
<state label="49" data="AL"/>
<state label="50" data="AL"/>
<state label="51" data="AL"/>
<state label="52" data="AL"/>
<state label="53" data="AL"/>
<state label="54" data="AL"/>
<state label="55" data="AL"/>
<state label="56" data="AL"/>
<state label="57" data="AL"/>
<state label="58" data="AL"/>
<state label="59" data="AL"/>
<state label="60" data="AL"/>
<state label="61" data="AL"/>
<state label="62" data="AL"/>
<state label="63" data="AL"/>
<state label="64" data="AL"/>
<state label="65" data="AL"/>
<state label="66" data="AL"/>
<state label="67" data="AL"/>
<state label="68" data="AL"/>
<state label="69" data="AL"/>
<state label="70" data="AL"/>
<state label="71" data="AL"/>
<state label="72" data="AL"/>
<state label="73" data="AL"/>
<state label="74" data="AL"/>
<state label="75" data="AL"/>
<state label="76" data="AL"/>
<state label="77" data="AL"/>
<state label="78" data="AL"/>
<state label="79" data="AL"/>
</states>
</mx:Model>

<mx:Panel title="List Control Example" height="772" width="892" 
paddingTop="10" paddingBottom="10" paddingLeft="10"
paddingRight="10" layout="absolute">

<mx:List id="source" width="100%" color="blue" height="200"
dataProvider="{mystates.state}" verticalScrollPolicy="on"
enterFrame="onEnterFrame(event)"
mouseMove="onMouseMove(event)"
mouseOut="onMouseOut(event)" x="10" y="34"
liveScrolling="true"/>
<mx:Button x="10" y="254" label="MoveUp" width="286" 
mouseOver="speed = - 0.5" mouseOut="onMouseOut(event)"/>
<mx:Button x="304" y="254" label="MoveDown" width="286" 
mouseOver="speed = 0.5" mouseOut="onMouseOut(event)"/>
</mx:Panel>
</mx:Application>