Hi Kenny,
Just for a little more background info that others may find beneficial.
You can think of the data object as a single record (or row) in the
DataGrid's dataProvider (dataset). Every column's itemRenderer in a
DataGrid has access to all of the fields in the record (data object);
regardless of the dataField that is set. However, since itemRenderers
are recycled, you have to perform any conditional logic in the
itemRenderer's set data function. This ensures that when the data is
changed, that the itemRenderer will be refreshed with the appropriate
state. Inside the RollOverButton itemRenderer, you'll have to override
the set data method in script:
override public function set data(value:Object):void
{
super.data = value;
if (data != null)
{
this.visible = (data.fn == "showMe" ? true : false);
}
super.invalidateDisplayList();
}
Hope that this helps.
Cheers,
-TH
--- In [email protected], "Kenny" <[EMAIL PROTECTED]> wrote:
>
> I figured it out!!
>
> Thanks again for the help. :o)
>
> Kenny
>
>
> --- In [email protected], "Kenny" kennysphone@ wrote:
> >
> > Oh! Now see, I knew it would be something simple. :o)
> >
> > Ok, so that helped me with another problem I was having elsewhere
too,
> > so double thanks for that one!
> >
> > I have read about the render handlers not keeping state, but I'm not
> > sure how to handle this situation. How can I set it for each case,
as
> > you've instructed? I'm sure I've seen it somewhere before, but
> > honestly, it's quicker for me to ask here than to go look around the
> > web for it. ;o)
> >
> > Thanks again!
> >
> > Kenny
> >
> > --- In [email protected], "Tracy Spratt" <tspratt@> wrote:
> > >
> > > Should be data.fn;
> > >
> > >
> > >
> > > Note, you must set this for every case, ie, always set the
> visibility on
> > > data change. Renderers are recycled and will not keep any state.
> > >
> > >
> > >
> > > Tracy
> > >
> > >
> > >
> > > ________________________________
> > >
> > > From: [email protected]
> [mailto:[EMAIL PROTECTED] On
> > > Behalf Of Kenny
> > > Sent: Friday, May 23, 2008 11:24 AM
> > > To: [email protected]
> > > Subject: [flexcoders] Question regarding DataGrid
> > >
> > >
> > >
> > > Hello.
> > >
> > > In the following code, I would like to be able to reference the
data
> > > field called "fn" from within the item renderer for the last
column,
> > > which contains the RollOverButton.
> > >
> > > Can someone tell me how I can do this?
> > >
> > > What I want to do is have the button be visible in some cases, but
not
> > > others.
> > >
> > > Thanks!
> > >
> > > Kenny
> > >
> > > CODE BELOW
> > > ==================================
> > >
> > > <mx:DataGrid id="dgMediaHistory"
> > > x="27"
> > > y="59"
> > > width="380"
> > > height="339"
> > >
dataProvider="{svcGetMediaHistory.lastResult.dataset.mediahistory}"
> > > resizableColumns="false"
> > > allowMultipleSelection="false"
> > > allowDragSelection="false"
> > > draggableColumns="false"
> > > change="historyChangeHandler()">
> > > <mx:columns>
> > > <mx:DataGridColumn headerText="Msg" dataField="fn" width="85"/>
> > > <mx:DataGridColumn headerText="Date" dataField="whenplayed"
> > > width="140"/>
> > > <mx:DataGridColumn headerText="" width="30">
> > > <mx:itemRenderer>
> > > <mx:Component>
> > > <comp:RollOverButton width="20" height="20"
> > > upImage="{outerDocument.playImageUp}"
> > > overImage="{outerDocument.playImageOver}"
> > > downImage="{outerDocument.playImageDown}"
> > > click="outerDocument.playMedia()"/>
> > > </mx:Component>
> > > </mx:itemRenderer>
> > > </mx:DataGridColumn>
> > > </mx:columns>
> > > </mx:DataGrid>
> > >
> >
>
