Yes, this: groupsdata.getItemAt(f).state = true/false is a low-level assignment directly to the dataprovider item and does not dispatch the events necessary for the update of the UI.
You can change it to use setItemAt() or you can call itemUpdated(item) after the assignment. I am sure both of these use the invalidation mechanism and optimize the rendering. I am not sure about refresh(), and that is not the correct usage anyway. Tracy -----Original Message----- From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of ben gomez farrell Sent: Friday, October 17, 2008 2:01 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Refreshing graphics in a tree I have an arraycollection called groupsdata.... groupsdata.getItemAt(f).state = true/false And then in my itemRenderer, I override like this: override public function set data(value:Object):void { super.data = value; if ( !value ) { return; } // remove check box from child nodes if present if ( !value.toplevel && this.getChildByName("checkbox") ) { this.removeChild( this.getChildByName("checkbox") ); } } override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { super.updateDisplayList(unscaledWidth, unscaledHeight); if(super.data) { if (super.icon != null) { checkBox.x = super.icon.x; checkBox.y = 12; super.icon.x = checkBox.x + checkBox.width + 17; super.label.x = super.icon.x + super.icon.width + 3; checkBox.selected = super.data.state; } else { checkBox.x = super.label.x; checkBox.y = 12; super.label.x = checkBox.x + checkBox.width + 17; checkBox.selected = super.data.state; } } } So it looks like the data object is getting set correctly, but updateDisplayList isn't getting called when the data is refreshed - but it does get called on mouse over. thanks again for the help! ben Tracy Spratt wrote: > > So how are you updating the dataProvider items with the checkbox state? > > Are you using the ArrayCollection API? If so, then the UI will update > automatically. > > Note: refresh() applies a sort. It does not generically "refesh" the > UI. Also, if you use the API, it should not be necessary to do > anything else for the list either. > > Tracy > > ------------------------------------------------------------------------ > > *From:* flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] > *On Behalf Of *ben gomez farrell > *Sent:* Friday, October 17, 2008 1:36 PM > *To:* flexcoders@yahoogroups.com > *Subject:* Re: [flexcoders] Refreshing graphics in a tree > > My data is an ArrayCollection is set via mytree.dataProvider = > myArrayCollection; > I have a list as well, and when I do mylist.dataProvider.refresh(), the > checkboxes on those update just fine. > Unfortunately doing mytree.dataProvider.refresh() doesn't work - and > only mousing over will update the graphics of the item. > I'll look into itemUpdated though, and see how I can use it, thanks! > ben > > Tracy Spratt wrote: > > > > How are you updateing the dataProvider? If you use the correct API, > > the changes should reflect automatically. If you are using lower > > level assignments, then you might need to call itemUpdated for > > collections. > > > > > > > > What is your dataprovider? > > > > > > > > Tracy > > > > > > > > ---------------------------------------------------------- > > > > *From:* flexcoders@yahoogroups.com > <mailto:flexcoders%40yahoogroups.com> > [mailto:flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com>] > > *On Behalf Of *ben gomez farrell > > *Sent:* Friday, October 17, 2008 12:40 PM > > *To:* flexcoders@yahoogroups.com <mailto:flexcoders%40yahoogroups.com> > > *Subject:* [flexcoders] Refreshing graphics in a tree > > > > > > > > Hey, I have a tree with a itemRenderer to have a clickable checkbox in > > it. I need to set the checkbox state sometimes through code. > > Everything works great, except the graphics of the checkbox don't update > > when it's set through code (mousing over the node will refresh the > > graphics) > > Is there a way to refresh the graphics of all the nodes through some > > method of the tree? I CAN open and close the nodes to refresh the > > graphics, but it seems really silly, and I have to track whats open and > > closed and make sure it gets back to the same state again. > > > > Thanks! > > ben > > > > > > ------------------------------------ -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Alternative FAQ location: https://share.acrobat.com/adc/document.do?docid=942dbdc8-e469-446f-b4cf- 1e62079f6847 Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.comYahoo! Groups Links
