Flex DataGrid Scrollbar¹ö¶¯Ìõx£¬yÆðʼλÖÃÉèÖÃ

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¹Ø¼üµãÔÚÓÚDataGridÓµÓÐprotectedµÄ horizontalScrollBar ºÍ verticalScrollBar ÊôÐÔ£¬¶ÔÆäÉèÖü´¿ÉʵÏÖÈçÉϽØͼµÄЧ¹û¡£´úÂëÈçÏ£º package com.util.component
{
import mx.controls.DataGrid;
import mx.events.DataGridEvent;
import mx.core.ScrollPolicy;
import mx.events.FlexEvent;
public class AFWDataGrid extends DataGrid
{
public function AFWDataGrid()
{
super();
horizontalScrollPolicy = ScrollPolicy.AUTO;
}

private function setScrollPos():void
{
if(columns == null || columns.length < lockedColumnCount)
return;
var xOffset:Number = 0;
for(var i:int=0; i<lockedColumnCount; ++i)
xOffset += columns[i].width;
if (horizontalScrollBar && horizontalScrollBar.x < xOffset){
horizontalScrollBar.x = xOffset;
horizontalScrollBar.setActualSize(horizontalScrollBar.width - xOffset,
horizontalScrollBar.height);
}
if(verticalScrollBar && verticalScrollBar.y < headerHeight){
verticalScrollBar.y = headerHeight;
verticalScrollBar.setActualSize(verticalScrollBar.width,
verticalScrollBar.height - headerHeight);
}
}

override protected function updateDisplayList(w:Number, h:Number):void
{
super.updateDisplayList(w, h);
setScrollPos();
}
}
}