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From Adnan Doric <astrona...@gmail.com>
Subject Re: Re: Spark Datagrid backend sorting possible ?
Date Mon, 29 Apr 2013 19:22:23 GMT
Thank you Frédéric & Evyatar, I'll try that and keep you informed on how 
it went.

On 29/04/2013 15:46, Frédéric THOMAS wrote:
> Or maybe overriding Datagrid->sortByColumns, not calling super and 
> simply returning false/true depending if you want them considered as 
> sorted or not;
>
> -Fred
>
> -----Message d'origine----- From: Evyatar Ben Halevi-Arbib
> Sent: Monday, April 29, 2013 3:29 PM
> To: users@flex.apache.org
> Subject: Re: Re: Spark Datagrid backend sorting possible ?
>
> It sounds like you just need to catch the column header mouse down event,
> prevent default and execute your server calling code...
>
> Good luck,
> Evyatar
> On Apr 29, 2013 4:03 PM, "Adnan Doric" <astronaute@gmail.com> wrote:
>
>> 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<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 <tc@extravision.com> 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/<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
>>>
>>>
>>>
>>>
>>
>
>


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