Mine

package test {

	import flash.display.Sprite;
	import flash.events.Event;
	import org.aswing.*;
	import org.aswing.border.*;
	import org.aswing.geom.*;
	import org.aswing.colorchooser.*;
	import org.aswing.ext.*;

	public class testscrollpane {
		
		public function testscrollpane(main:Sprite) {
			
			var f1:FlowParentLayout = new FlowParentLayout();
			var f2:FlowParentLayout1 = new FlowParentLayout1();
			
			createFrameTest(f1,"FlowParentLayout");
			createFrameTest(f2,"FlowParentLayout1");
			
			
			var f:JFrame = new JFrame(main, "JScrollPaneFlow");
			
			var p:JPanel = new JPanel();//new FlowParentLayout());
			p.setBackground(ASColor.WHITE);p.setOpaque(true);
			
			fillPanel(p);
			
			f.getContentPane().append(new JScrollPaneFlow(p));
			
			f.setSizeWH(400,300);
			f.show();
		}
		
		private function createFrameTest(layout:LayoutManager,title:String):void {
			var f:JFrame = new JFrame(null, title);
			
			var p2:JPanel = new JPanel(layout);
			p2.setBackground(ASColor.WHITE);
			p2.setOpaque(true);
			p2.setClipMasked(false);
			
			fillPanel(p2);
			
			var v:JViewport = new JViewport(p2,true);
			v.setHorizontalAlignment(AsWingConstants.LEFT);
			v.setVerticalAlignment(AsWingConstants.TOP);
			
			var s:JScrollPane = new JScrollPane(v);
			s.setBackground(ASColor.HALO_GREEN);
			s.setOpaque(true);
			
			f.getContentPane().append(s);
			
			f.setSizeWH(400,300);
			f.show();
		}
		
		private function fillPanel(p:JPanel):void {
			for (var i:int = 0; i < 100; i++) {
				var b:JButton = new JButton(i.toString());
				b.setPreferredSize(new IntDimension(Math.round(20*Math.random())+30,Math.round(20*Math.random())+30));
				//b.setPreferredSize(new IntDimension(65,50));
				b.addActionListener(onClick);
				b.setToolTipText("Click me!");
				p.append(b);
			}
		}
		
		private function onClick(e:Event):void {
			var b:Component = e.target as JButton;
			if(b != null) b.addEventListener(Event.ENTER_FRAME,_onEnterFrame);
		}
		
		private function _onEnterFrame(e:Event):void {
			var b:Component = e.target as JButton;
			b.alpha += -b.alpha/10;
			if(b.alpha <0.01){
				b.removeEventListener(Event.ENTER_FRAME,_onEnterFrame);
				b.setVisible(false);
			}
		}
		
	}
	

	
}

import org.aswing.*;
import org.aswing.geom.*;
	
internal class FlowParentLayout1 extends FlowWrapLayout{
	
	public function FlowParentLayout1() {
		//super(200,AsWingConstants.LEFT,0,0,false);
	}
	
	override public function preferredLayoutSize(target:Container):IntDimension {
		setPreferWidth(target.getParent().getWidth());
    	return super.preferredLayoutSize(target);
    }
}