I think list does a bit more thinking. I think it computes a typicalItem and uses that as the default size. One of the issues with Image-based renderers is that they have no size until the image loads. If you know the size upfront, set that on the renderer.
On 3/30/10 6:29 AM, "Dan Vega" <[email protected]> wrote: Take the following example. On the left you have a list that loads data from another file. The data is a basically a set of typed objects that have a src attribute that points to an image. Don't worry to much about that, just know that we are getting a list of images. The list on the left shows an initial list with some scrollbars and about 5 images. The list looks like it can only scroll 1 or 2 more images but in fact there are about 20 images. As you start scrolling the list figures out that there are more and adjusts the scroll bars. It keeps doing this until we reach the last images and finally the scroll bars work as expected. What I don't understand is the data group next to it works exactly how I expect the list to work. I thought the list was basically using the data group in the end anyways? What am I missing / doing wrong? If you need the full example I can email it to you, just ping me. <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"; xmlns:s="library://ns.adobe.com/flex/spark <http://ns.adobe.com/flex/spark> " xmlns:mx="library://ns.adobe.com/flex/mx <http://ns.adobe.com/flex/mx> " initialize="GalleryService.loadData()" > <s:layout> <s:HorizontalLayout paddingTop="20" paddingRight="20" paddingBottom="20" paddingLeft="20"/> </s:layout> <s:List height="100%" dataProvider="{GalleryService.results}" itemRenderer="GalleryImageRenderer" dragEnabled="true" > <s:layout> <s:VerticalLayout horizontalAlign="justify"/> </s:layout> </s:List> <s:Scroller height="100%"> <s:DataGroup dataProvider="{GalleryService.results}" itemRenderer="GalleryImageRenderer"> <s:layout> <s:VerticalLayout horizontalAlign="justify"/> </s:layout> </s:DataGroup> </s:Scroller> --> </s:Application> Thank You Dan Vega [email protected] http://www.danvega.org/ -- Alex Harui Flex SDK Team Adobe System, Inc. http://blogs.adobe.com/aharui
