Well, you access attribute values differently than you access child node
values. Did you fix that?
If you still use attribute values somewhere, but not in all nodes, then
the "@selected" syntax will give this error. Replace it with
attribute("selected")
Tracy
________________________________
From: [email protected] [mailto:[EMAIL PROTECTED] On
Behalf Of Amy
Sent: Wednesday, March 05, 2008 7:56 PM
To: [email protected]
Subject: [flexcoders] XML structure and error with listbase
Hi, all;
I'm trying to build something like an SAT score sheet. That is, I
had it built, but now the requirements have changed and I am having
problems making the modifications. Initially, I created it so only a
single button in the row could be selected, but now I need to be able
to have multiple buttons selected.
When the XML structure changed from
<question id="1" selected="2" />
to
<question id="1">
<selected>2</selected>
<selected>4</selected>
</question>
the whole thing blew up
I'm using an ItemRenderer in a TileList. I am using it with
ClassFactory, because the component can be used in one of two modes,
one of which will still toggle in the old way and the other of which
will allow multiple selections.
The errors I am getting are:
TypeError: Error #1009: Cannot access a property or method of a null
object reference.
at mx.controls.listClasses::TileBase/createItemRenderer()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasse
s\TileBase.as:1972]
at
mx.controls.listClasses::TileBase/http://www.adobe.com/2006/flex/mx/in
<http://www.adobe.com/2006/flex/mx/in>
ternal::getMeasuringRenderer()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasse
s\TileBase.as:1890]
at mx.controls.listClasses::TileBase/measureHeightOfItems()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasse
s\TileBase.as:2016]
at mx.controls.listClasses::TileBase/commitProperties()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\controls\listClasse
s\TileBase.as:2325]
at mx.core::UIComponent/validateProperties()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as
:5670]
at mx.managers::LayoutManager/validateProperties()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\LayoutMana
ger.as:519]
at mx.managers::LayoutManager/doPhasedInstantiation()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\managers\LayoutMana
ger.as:669]
at Function/http://adobe.com/AS3/2006/builtin::apply
<http://adobe.com/AS3/2006/builtin::apply> ()
at mx.core::UIComponent/callLaterDispatcher2()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as
:8460]
at mx.core::UIComponent/callLaterDispatcher()
[E:\dev\3.0.x\frameworks\projects\framework\src\mx\core\UIComponent.as
:8403]
I can post my code if needed, but I know some people get impatient
with that, so I'll wait to find out if anyone needs to see it :-).
Thanks;
Amy
