Ah, cool. So all that Flash frame stuff
might actually be good to know about!
From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of JesterXL
Sent: Friday, December 30, 2005
1:31 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders]
CheckCellRenderer
Naw, it actually calls invalidate each time, so it's only
updated once per frame, whether you call it 1, or 1000 times. That's the
beauty of DataProvider API!
However, the manual dispatch isn't so bad because for
thousands of records, this:
+ dispatch modelChanged()
is faster than editField on thousands of records.
Don't have benchmarks, though.
----- Original Message -----
Sent: Friday, December
30, 2005 1:24 PM
Subject: RE: [flexcoders]
CheckCellRenderer
The difference is that edit field will
update the UI immediately every time you call it. This is fine with small
data sets. If you update many items, then there might be a performance
issue with so many ui refreshes.
Also, you might be able manually dispatch
the modelChanged event instead of re-assigning the dataProvider, but I have not
tried this.
Tracy
From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of Rob Dickey
Sent: Thursday, December 29, 2005
11:13 PM
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] CheckCellRenderer
Hi Tracy, JesterXL,
Thanks for both replies and suggestions.
Both worked great, although I think I’ll stick to the last
suggestion (editField) as
It would take more comments then code to
explain why I am reassigning the data provider to the grid that it’s
already assigned to J
Regards,
Rob
From: flexcoders@yahoogroups.com [mailto:flexcoders@yahoogroups.com] On Behalf Of JesterXL
Sent: Thursday, December 29, 2005
5:56 PM
To: flexcoders@yahoogroups.com
Subject: Re: [flexcoders] CheckCellRenderer
Example:
dataGrid.dataProvider[i].cbSelect = newState;
becomes:
dataGrid.dataProvider.editField(i,
"cbSelect", newState);
----- Original Message -----
From: "Tracy Spratt"
<[EMAIL PROTECTED]>
To: <flexcoders@yahoogroups.com>
Sent: Thursday, December 29, 2005 8:57 PM
Subject: RE: [flexcoders] CheckCellRenderer
This form of update:
dataGrid.dataProvider[i].cbSelect = newState
does not cause the dataProvider to emit the
modelChanged event to update
the control.
Instead, use the dataProvider API, like
editItemAt().
Or, probably better in your case, when you are
done updating the
dataProvider, re-assign it to the control:
Datagrid.DataProvider = DataGrid.dataProvider;
This should cause the proper events to fire and
update the screen.
Tracy
-----Original Message-----
From: flexcoders@yahoogroups.com
[mailto:flexcoders@yahoogroups.com]
On
Behalf Of rb_dickey
Sent: Thursday, December 29, 2005 7:50 PM
To: flexcoders@yahoogroups.com
Subject: [flexcoders] CheckCellRenderer
Hi,
I'm trying to do a simple loop through a datagrid
to set a column
that's using the CheckCellRenderer to be checked
or unchecked but
the following code does not work, well sort
of. What happens is
that if I "mouseover" each row, viola,
the checks in the checkbox
appear or disappear depending on my choice to
select all or not.
Here is the function I call to set the checkboxes
in the grid:
private function selectAll(newState:Boolean):Void
{
for( var i in dataGrid.dataProvider )
dataGrid.dataProvider[i].cbSelect = newState;
}
The datagrid column is defined as:
mx:DataGridColumn headerText=""
width="40" columnName="cbSelect"
cellRenderer="CheckCellRenderer"
resizable="true" />
The dataprovider for the grid is an RO...
TIA for any info.
Rob
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