Random shot, try importing
mx.controls.Text and mx.controls.TextInput? I think it should have been a
compiler error if it was necessary but…
Note that the error is for the item editor
when you say it’s the renderer that you change to fix it. Sounds like a
bug to me… I’ll forward it inside.
Matt
From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of Scott Romer
Sent: Thursday, April 27, 2006
2:41 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] Null error
when using specifying itemRenderer on dataGridColumn
I've been struggling for some time
now (and I'm assuming this must just be so brain-dead simple)...
Trying to set an ItemRenderer and ItemEditor on a datagridColumn. For
certain ItemRenderer's, I am getting a null error. (using Flex 2 beta 2)
NOTE: I am not trying to use these as my actual renderer and editor classes as
they don't really provide anything at all above the defaults.. but I noticed
this gives the EXACT same error. (My actual renderer extends from
Canvas...)
If you change the itemRenderer to mx.controls.Label, then it works fine.. and
oddly enough Text extends Label. Any ideas?
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
backgroundAlpha="0" creationComplete="initApp()">
<mx:Script>
<![CDATA[
&! nbsp; import
mx.collections.ArrayCollection;
[Bindable]
public var
dataProvider:ArrayCollection;
private function initApp():void
{
dataProvider
= new ArrayCollection([
{name: "John Smith", dept: "Engineering"},
{name: "Jane Doe", dept: "Marketing"},
! {name: "Lisa Brown", dept: "Sales"},
&nbs! p;
{name: "Robert Wong", dept: "Engineering"},
{name: "Amy Taylor", dept: "Finance"},
]);
}
]]>
</mx:Script>
<mx:DataGrid id="myDatagrid"
dataProvider="{dataProvider}"
variableRowHeight="true" editable="true"
rowHeight="50"
width="300" height="300">
<mx:columns>
<mx:DataGridColumn
dataField="name"/>
&! nbsp; <mx:DataGridColumn
dataField="dept" editable="true"
itemRenderer="mx.controls.Text"
editorDataField="text"
itemEditor="mx.controls.TextInput">
</mx:DataGridColumn>
</mx:columns>
</mx:DataGrid>
</mx:Application>
Null error received when
trying to edit the dept column:
TypeError:
Error #1009: null has no properties.
at mx.controls::DataGrid/createItemEditor()
at mx.controls::DataGrid/itemEditorItemEditBeginHandler()
at flash.events::EventDispatcher/dispatchEvent()
at mx.controls::DataGrid/commitEditedItemPosition()
at
mx.controls::DataGrid/mx.controls:DataGrid::updateDisplayList()
at ! mx.core::UIComponent/validateDisplayList()
&nbs! p; at mx .managers::LayoutManager/validateDisplayList()
at mx.managers::LayoutManager/::doPhasedInstantiation()
at mx.core::UIComponent/::callLaterDispatcher2()
at mx.core::UIComponent/::callLaterDispatcher()
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