Well, I decided to give it a go. The example at the bottom of the page you mention exhibits the exact problem you describe.
So, I downloaded the source, created a new project in Flex Builder and pasted it. Guess what? The newly compiled version does not exhibit the same behavior; The vertical scroll bar appears after you add the second item from the list on the right. I wonder if it was fixed in a newer version of the SDK? What version are you using? I am using 3.3.0. --- In [email protected], "Dave Kong" <davek...@...> wrote: > > After some googling, this seems to be an existing issue with Tree refreshes > and I haven't been able to find a good workaround. > > The issue can be repro'ed at one of Adobe's quickstart demo page: > http://www.adobe.com/devnet/flex/quickstart/working_with_tree/ > > Go to the last example, and expand all nodes in the tree on the left. Height > doesn't exceed the container, so no scrollbar. Now drag elements from the > right to the tree to insert them. When the height of tree extends beyond the > container, no v-scrollbar is shown. But a scrollbar is shown after you > collapse/expand the tree. > > Invalidating the tree's list/properties/displaylist didn't seem to cause a > refresh. The underlying collection still returns old length when Tree > processes configureScrollBars(). > > Can anyone suggest a good workaround? (aside from reassigning dataProvider, > since that's too expensive for me.) > > A couple of old flexcoder threads also talks about this problem: > http://tech.groups.yahoo.com/group/flexcoders/message/46541 > http://tech.groups.yahoo.com/group/flexcoders/message/37627 > > Thanks! >
