I'm having a bit of scrolling trouble with a rather complex layout that involves nested item renderers. Imagine a list (of books, say), where each item is itself a list (of page thumbnails). I only want scrolling of the entire book list. I've implemented this with a book item renderer that contains a page list (which in turn has a thumbnail item renderer). The thumbnail list has its rowCount set to the number of pages (done in a binding function). I'm also attempting to virtualize the thumbnail list by providing a custom IList that returns proxies.
I believe I have scrollbar policies and variable row heights set appropriately at all levels. The behavior I'm seeing is that the top level list does not get a scroll bar when it should. If I replace the list-based book item renderer with a simple label, I do get the scroll bar if there are enough books. I realize it may be difficult to help me without code, but if anyone has tried something similar, or knows of any known measuring bugs in this type of scenario, please let me know. Thanks.
