+ return;
+ }
+
+ if ( col->IsSortKey() )
+ {
+ // already using this column for sorting, just change the order
+ col->ToggleSortOrder();
+ }
+ else // not using this column for sorting yet
+ {
+ // first unset the old sort column if any
+ int oldSortKey = owner->GetSortingColumnIndex();
+ if ( oldSortKey != wxNOT_FOUND )
+ {
+ owner->GetColumn(oldSortKey)->UnsetAsSortKey();
+ owner->OnColumnChange(oldSortKey);
+ }
+
+ owner->SetSortingColumnIndex(idx);
+ col->SetAsSortKey();
+ }
+
+ wxDataViewModel * const model = owner->GetModel();
+ if ( model )
+ model->Resort();
+
+ owner->OnColumnChange(idx);