Hi Jason,
I think I have this working as required now with just the one sort method
used by every column (I think this is OK as I have multi-column sorting
turned off).
I have moved the createColumns() method onto the MyAdvancedDataGrid class
and added the following to that class:
// map of column objects keyed against their datafields (populated by
createColumns() method)
private var mColumns:Object;
// keep track of currently sorted column
private var mSortedColumn:AdvancedDataGridColumn;
public function MyAdvancedDataGrid (id:String)
{
<snip>
addEventListener(AdvancedDataGridEvent.SORT, sortEventHandler);
}
private function sortEventHandler(event:AdvancedDataGridEvent):void
{
mSortedColumn = mColumns[event.dataField];
}
Then within createColumns() every new column gets
column.sortCompareFunction = compareExcludeSummaryRow;
where the sort method is:
private function compareExcludeSummaryRow(obj1:Object,
obj2:Object):int
{
// should never be in this state
if (mSortedColumn == null)
{
// TODO log error
return 0;
}
var isSortDescending:Boolean = mSortedColumn
.sortDescending;
var sortField:String = mSortedColumn .dataField;
if (obj1.summary)
{
return isSortDescending ? -1 : 1;
}
else if (obj2.summary)
{
return isSortDescending ? 1 : -1;
}
else if (obj1[sortField] < obj2[sortField])
{
return -1;
}
else if (obj1[sortField] > obj2[sortField])
{
return 1;
}
else
{
return 0;
}
}
This seems to work nicely now, but as I say I think it is restricted to
single column sorting, which is fine for me.
Thanks for your help, and any further comments appreciated!
Dan.
Pan Troglodytes wrote:
>
> Sorry Dan, my brain must not have been fully in gear. You do need to
> check
> the columns sort order:
>
> if (obj1.summaryRow)
> return col1.sortDescending ? -1 : 1
> else if (obj2.summaryRow)
> return col1.sortDescending ? 1 : -1
> else if (obj1.value < obj2.value)
> return -1
> else if (obj1.value > obj2.value)
> return 1
> else
> return 0;
>
> Where col1 is the id of the column being sorted. That should (hopefully)
> do
> it.
>
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