Begin forwarded message:
From: Charles Watt <[email protected]>
Date: May 1, 2009 2:25:50 PM PDT
To: [email protected]
Subject: [Laszlo-user] Drag and drop refresh issue using dhtml
After running into issues with the opttree component from the
incubator, I've extended the standard tree component to support drag
and drop to allow reordering of the tree. I used the draglib
library with checkdragstate and basedragimage for the implementation.
It works great in all versions of swf. But with dhtml there is a
subtle bug -- and of course dhtml is technology in which we need to
deliver the code. With dhtml, if tree items are moved to a
different branch of the tree, subsequent operations can be flakey.
The correct item will be dragged, but occasionally the wrong target
will be selected for the drop. After some investigation it looks as
if the tracker implementing the drop does not refresh its view of
the tree layout. When it tries to drop onto the Nth clone, it
selects the original Nth clone rather than the current. However the
displayed tree looks correct and I've manually walked both the
hierarchy of clones and nodes and they both look correct. Only the
tracker seems confused.
I tried fixing this by unregistering all drop targets and then re-
registering them after moving a tree item. But the tracker still
has the same, original view of the tree.
Any suggestions on what I missed or how I might get the tracker
synched up with the current layout of the tree?
Thanks!
Charlie Watt
Racemi
