Maybe this will help: http://blogs.adobe.com/aharui/2008/03/smooth_scrolling_list.html
From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Kunkle Sent: Saturday, November 15, 2008 3:58 AM To: [email protected] Subject: [flexcoders] Re: Success!!! But I still need help!! (RE: Custom scrolling with TileList) I realize this post is over 2 years old, but I'm having a similar problem, and I can't find much info out there. I'm using a TileList control, and I've added buttons to the top and bottom and removed the scroll bars. I'd like buttons to smoothly scroll in the new images, but right now it just flashes to the new times....I'd like something like the way the image scroll bar works on pictobrowser: http://www.db798.com/pictobrowser/samples.html But I'm not sure where to place the transition effects, or which effects to use. Any information or tips would be really helpful. Thanks, Rob --- In [email protected]<mailto:flexcoders%40yahoogroups.com>, "qnotemedia" <[EMAIL PROTECTED]> wrote: > > Well - never received a reply to this thread, but I've figured out > how to get the look, feel, and interactivity that I wanted via lots > of nested Canvas', HBox's, VBox's, etc...Here's what I've basically > done. Again, the goal was to make a vertical TileList with component > itemRenderer, that scrolls smoothly, and rather than using the > default scrollbar, create my own scrollDown and scrollUp buttons > (with no scrollbar actually available - just the buttons). > > - I have a TileList of course, and its height is dynamically set to > the number of items in the itemRenderer * 125 (an item's height). > scrollingPolicy is disabled. With 75 items that makes its height. > > - itemRenderer consists of an image and label. The images can be > large - width of 640 - and are scaled down via maxWidth/Height. > > - The TileList is within a VBox with scrollingPolicy disabled. > > - An Up/Down button calls a function that sets the > verticalScrollPosition of the VBox to += 20 or -= 20 via buttonDown > with autorepeat. This creates the effect of a nice smooth scroll! > > > PROBLEM I need help with now: > Performance has become an issue. When the TileList contains 75 > thumbnails, that makes its height nearly 10,000 (75*125)! The > problem is that, to Flex, the entire list is being displayed, whereas > when you normally display a smaller sized TileList, items are not > loaded until they are physically displayed by the user. When it > first loads, it really chokes up cause its calling to load every > single thumbnail in the list all at the same time. > > Is there any way to fix this!? > > - Chris >
