Ben, I'm not aware of a rule that you must override the .data setter. Can you explain further?
-Alex ________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of ben.clinkinbeard Sent: Friday, March 23, 2007 5:48 PM To: [email protected] Subject: [flexcomponents] Re: datagrid header with checkbox Hi Douglas, If you look in the docs, you'll see that itemRenderers (and itemEditors) are the primary use cases for ClassFactory. In fact, when you say something like <mx:List id="myList" itemRenderer="ProductRenderer">, the compiler actually creates a ClassFactory instance for you behind the scenes. Explicitly creating the ClassFactory instance simply allows you to use the properties property, which is the key to making a reusable renderer. Further evidence of the correlation is that the itemRenderer and itemEditor properties are of type IFactory, which is what ClassFactory implements. I don't want you to think I'm being defensive, its just that itemRenderers seem to be a topic that comes up repeatedly as a pain point for developers. I think if people had a better understanding of how they worked (especially the rule that you MUST override the data setter method), people could avoid a lot of headaches. The post I wrote prior to the one Darron referenced actually shows how to create a renderer in what I guess is the more traditional method (itemRenderer="MyRendererClass"), so that may be of help to you. However, the reason I initially began investigating ClassFactory was because of problems I was having getting a CheckBox to function as a headerRenderer. For reasons still unknown to me, headerRenderers seem to fire events extremely frequently, which caused difficulty getting it to respond to user interaction in a predictable way. Let me know if you have any other questions or concerns about renderers (and/or my approach to them) and I will do my best to help. Thanks, Ben --- In [email protected] <mailto:flexcomponents%40yahoogroups.com> , "Douglas Knudsen" <[EMAIL PROTECTED]> wrote: > > thanks, been reading that. Seems like this approach is way off the > direction normally taken for renderers though, eh? Not to knock Ben mind > you. Can add checkboxes to a datagrid cell with out that, correct? So why > not headers? > > oh...answering my other question...headers are rendered by > DataGridItemRenderer by default according to the docs. > > DK > > On 23 Mar 2007 13:31:04 -0700, Darron J. Schall <[EMAIL PROTECTED]> > wrote: > > > > Check out > > > > http://www.returnundefined.com/2006/11/creating-truly-reusable-renderers -with-classfactory/ <http://www.returnundefined.com/2006/11/creating-truly-reusable-renderer s-with-classfactory/> > > > > -d > > > > > > Douglas Knudsen wrote: > > > > > > How the heck to get a checkbox in the header of a data grid, eh? Let > > > me re-phrase that some...a workable checkbox. I can create a custom > > > renderer in AS to put one there, but can't click it at all. Anyone > > > have a example or a nudge? > > > > > > -- > > > Douglas Knudsen > > > http://www.cubicleman.com <http://www.cubicleman.com> <http://www.cubicleman.com <http://www.cubicleman.com> > > > > this is my signature, like it? > > > > > > > > > > > > > > > > -- > Douglas Knudsen > http://www.cubicleman.com <http://www.cubicleman.com> > this is my signature, like it? >
