actionscript-3 - AS3 - Keeping scrollbars on empty ScrollPane

Question

In my app I'm using a ScrollPane. I can load a DisplayObject into it, and it works fine. The thing is that when it's empty, i.e. I haven't loaded anything into it, there aren't any scrollbars on the pane. This makes sense, since there's no scrolling to do, but I'd like there to be "greyed out" scrollbars if possible.

It's not necessary or anything but most programs have it (open an empty .txt file in Notepad and you'll see what I mean), I'd just like to know if my app can do this.

If it helps at all, it's an AIR app made using FlashDevelop with the open-source Flex 4 SDK. I'm getting my components (ScrollPane, etc.) from a SWC.

Answer 1

根据您的需要设置垂直或水平滚动策略。

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/fl/containers/BaseScrollPane.html#verticalScrollPolicy

scrollPane.verticalScrollPolicy=ScrollPolicy.ON;
scrollPane.horizontalScrollPolicy=ScrollPolicy.ON;