mustella/tests/gumbo/layout3D/swfs/WheelComp.mxml

<?xml version="1.0" encoding="utf-8" ?>
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  this work for additional information regarding copyright ownership.
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<s:Scroller xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:layouts="layouts.*"
               width="300"
               height="200" tabChildren="true">

    <fx:Script>
        <![CDATA[
            import mx.core.IVisualElement;
            import spark.components.Button;
            import flash.events.MouseEvent;
            import layouts.NumberInterpolatorWrapping;
            import flash.geom.Point;

            public function generateButton(number:int):Button
            {
                var b:Button = new Button();
                var text:String = new String();
                for (var j:int = 0; j <(1+number/2); j++)
                {
                    for (var k:int = 0; k<number; k++)
                    {
                           text +=  k+j+number;
                    }
                    text += "\n";
                }
                b.label = text;
                b.addEventListener("click" /*MouseEvent.ROLL_OVER*/, eventHandler);
                return b;
            }

            public function generateElements(number:int, g:Group):void
            {
                for(var i:int = 0; i<number; i++)
                {
                    g.addElement(generateButton(i));
                }
            }

           public function eventHandler(event:Event):void
           {
               var index:int = g.getElementIndex(event.target as IVisualElement);
               if (index != -1)
                   testGroup(g, index);
           }

           public function testGroup(g:Group, n:int):void
           {
               var p:Point = g.layout.getScrollPositionDeltaToElement(n);
               if (p)
               {
                   var startX:Number = g.horizontalScrollPosition;
                   var startY:Number = g.verticalScrollPosition;
                   var interpolator:NumberInterpolatorWrapping = new NumberInterpolatorWrapping(0, g.contentWidth - g.measuredWidth);
                   var scrollLength:Number = interpolator.getLength(startX, startX + p.x);
               }
           }

        ]]>
    </fx:Script>

                 <s:Group id="g" tabChildren="true" clipAndEnableScrolling ="false"
                creationComplete="generateElements(8, g);">
                    <s:layout>
                        <layouts:WheelLayout gap="44" axisAngle="-10"/>
                    </s:layout>
                </s:Group>
 </s:Scroller>