实现FLEX的"DIV浮动层效果"

需求是鼠标移动到相应的DATAGRID的条目时出现该产品的图片，并且图片跟着鼠标的移动而移动

 

var titleWindow:TitleWindow;
            var img:Image;
            protected function dataGrid_itemRollOverHandler(event:ListEvent):void
            {

//              var posmodelVO:PosModelVO=dataProvider.getItemAt(event.rowIndex) as PosModelVO;
                var posmodelVO:PosModelVO=event.itemRenderer.data as PosModelVO
                if(titleWindow==null){
                    titleWindow=new TitleWindow();
                    img=new Image
                    img.width=100;
                    img.height=133;
                    img.maintainAspectRatio=false;
                    titleWindow.addElement(img);
                    titleWindow.width=110;
                    titleWindow.height=145;
                    titleWindow.setStyle("headerHeight","0");
                    titleWindow.setStyle('borderSides','solid');
                    titleWindow.setStyle('borderThickness','3');
                    PopUpManager.addPopUp(titleWindow,this,false);
                }
                    if(posmodelVO.image!=null){
                        titleWindow.visible=true;
                        img.source=posmodelVO.image;
                        titleWindow.x=mouseX;
                        titleWindow.y=mouseY;
                    }else {
                        titleWindow.visible=false;
                    }
            }