I think the problem Rami is seeing may be specific to swf10. It is a
problem with the way the player detects mouse interaction with the
display list. If it's any consolation, the bug hits Flex programs too.
On Mar 12, 2010, at 11:10, Norman Klein <[email protected]> wrote:
Once upon a time, I used opttree (actually checktree that is based
on opttree) to implement a tree that contained approximately 2300
nodes and didn't encounter any mouse degradation issues.
You might want to take a look at the opttree code and how they
implemented things.
Norman Klein
Author: Laszlo in Action
On Fri, Mar 12, 2010 at 3:34 AM, Rami Ojares <[email protected]>
wrote:
Allright I tried the following handler for my TreeNodes
<handler name="onvisible" args="visible"><![CDATA[
if (!this.inited) return;
//var count = 0;
var allSubnodes = GET_ALL_SUBNODES(this.subnodes);
if (allSubnodes==null) return;
for(var i=0; i<allSubnodes.length; i++) {
var delegates = allSubnodes[i].__LZdelegates;
if (delegates == null) continue;
for(var j=0; j<delegates.length; j++) {
var del = delegates[j];
//count++;
if (visible) del.enable();
else del.disable();
}
}
//Debug.debug("%w delegates %w", count, visible ? "enabled" :
"disabled");
]]></handler>
No effect.
The unregistering MIGHT have had some effect but I am not sure
anymore.
The only thing I have really found to have an impact on the
performance is destroying the objects.
But I discarded the creation/destroying strategy long time ago
because it was way too inefficient.
More and more I have been building object pools so I would not have
to create objects so often.
Can you Tucker say does disabling/enabling of delegates have any
performance gain?
So the lesson seems to be this:
"If you have a lot of views/objects your mouse performance starts to
choke."
Solution:
"Try not to have a lot of objects."
The only way out I can see now is to start stripping off features of
my TreeNodes.
- rami
On 11.3.2010 19:56, P T Withington wrote:
What platform are you compiling to? I recall there is a Flash
player bug that bit G.ho.st that had something like what you describe.
But also, I have to wonder if something with 100's of sub-menus
doesn't need a different approach. I wonder how a human navigates
such a large space.
On Mar 10, 2010, at 17:48, Rami Ojares <[email protected]> wrote:
Hi,
I have a tree structure (branches and leaves).
All of them react to various mouse events (mouseover, mousedown,
mousetrackover etc.)
I have implemented a mechanism where I initially load/construct only
the first level of nodes.
Everything works fine and with good performance.
When I keep opening branches (some of which have over hundred
subnodes) the mouse event performance starts to choke.
So I thought that whenever a node is not visible I disable all the
delegates handling the mouse events.
No effect.
Then I tried unregistering the delegates when the node is not visible.
No effect.
Then I tried to set the clickable attribute to false for all the
views that react to mouse events.
No effect.
Any suggestions?
- rami
