Hey, thank you for trying to help.
In fact, I don't want to implement lazy loading, it is a lot simpler
then that: I just want the DataGrid to avoid sorting all together and
let me populate "manually" the dataProvider.
Please take a look at the following Gist, it is a small example
illustrating the issue:
https://gist.github.com/adnandoric/5481416
As you will see, the moment you click on the column header, DataGrid
immediately sort it even though I explicitly set the sortCompareFunction
that returns null. I'm probably doing it wrong.
What I would like is to have DataGrid not sorting or doing anything at
all when I click on the header and let me handle the whole operation. At
the end, when data arrives from the backend, I would just need to adjust
the sortIndicator which is apparently possible using sortDescending,
thank you for that information :)
So, what do you think about this ? Feel free to fork the gist :)
Thank you,
Adnan
On 29/04/2013 13:13, Julio Carneiro wrote:
Yes, James Ward PagedList is the way to go if you want lazyloading.
Also, if you're sorting in the backend there is no reason to set a Sort again
in your dataProvider.
You can simply set the sort indicators by using something like:
columnHeaderGroup.visibleSortIndicatorIndices = new
<int>[_sortColumn];
Please not that visibleSortIndicatorIndices is a Vector, so if you are sorting
on multiple columns, you can set them all in the Vector.
As for the asc/desc indicators, you set them in the GridColumn 'sortDescending'
property.
hth
julio
On Apr 29, 2013, at 7:41 AM, Tom Chiverton <[email protected]> wrote:
On 29/04/2013 10:56, Adnan Doric wrote:
Hello all,
I would like to be able to click on Datagrid headers and trigger backend call
in order to paginate/sort/filter and send back an updated collection. Datagrid
should just display it as is.
How can this be done with data grid sort indicators correctly reflecting the state "ASC"
or "DESC"?
It's easier than you think.
If you are already backing this with a server result, drop in James Ward's
awesome PagedList connector to an AsyncListView as the dataprovider :
http://www.jamesward.com/2010/10/11/data-paging-in-flex-4/
Now just send the sort direction along with the call to the backend. You can get this
by listening for gridClick events with (event.rowIndex ==
-1)&&(event.columnIndex!=-1) and saving off the column name.
Applying a matching Sort to the local dataProvider and it'll show the right
indicators.
Tom
--
Julio Carneiro
