导读：
The mouse-hover and selection boxes in a Flex TileList only have styles for changing the colors. If you want more advanced things like changing the shape or having a border you'll need to extend the TileList class and override two methods.
一般的下拉列表对选中时的样式的支持不是很完善，要想得到理想的效果其实也不难，在基类的基础上稍加修改就可以了，可以参照下面的代码，效果图也很理想。
drawSelectionIndicator- Draws the box around the currently selected item.
drawHighlightIndicator- Draws the box for the mouse-over item
public class RoundedSelectionTileList extends TileList
{
public function RoundedSelectionTileList()
{
super();
}
override protected function drawSelectionIndicator(
indicator:Sprite, x:Number, y:Number,
width:Number, height:Number, color:uint,
itemRenderer:IListItemRenderer):void
{
var g:Graphics = indicator.graphics;
g.clear();
g.beginFill(0x3f4c6b);
g.lineStyle(2,0x6e7c9d);
g.drawRoundRect(x,y,itemRenderer.width,height,15,15);
g.endFill();
}
override protected function drawHighlightIndicator(indicator:Sprite, x:Number, y:Number,
width:Number, height:Number, color:uint,
itemRenderer:IListItemRenderer):void
{
var g:Graphics = indicator.graphics;
g.clear();
g.beginFill(0x3f4c6b);
g.lineStyle(2,0x6e7c9d);
g.drawRoundRect(x,y,itemRenderer.width,height,15,15);
g.endFill();
}
}
Before:
After:
While you're in there, take a look at the other draw* protected methods. You can change most aspects of the control with those.
本文转自
http://www.rogue-development.com/blog/2007/12/customizing-tilelist-selection.html