Example: TreeList.Sorted, TreeList.SortedColumnCount, TreeList.SortedColumns, Column.SortOrder

• Jul 30, 2021

The following sample changes the sort order of all the columns within the tree list control. The TreeList control’s Sorted property must be set to True or the method does nothing.

Delphi

procedure InvertSorting;
var
  I: Integer;
  ASortDesc: Boolean;
begin
  if not cxTreeList.Sorted then Exit;
  cxTreeList.BeginUpdate;
  try
    for I := 0 to cxTreeList.SortedColumnCount - 1 do
    begin
      ASortDesc := cxTreeList.SortedColumns[I].SortOrder = soDescending;
// changing the sort order of the current column
      cxTreeList.SortedColumns[I].SortOrder := TcxDataSortOrder(Integer(not ASortDesc) + 1);
    end;
  finally
    cxTreeList.EndUpdate;
  end;
end;

C++

void __fastcall InvertSorting() {
  if (!(Form1->cxTreeList->Sorted)) {
    return;
  }
  Form1->cxTreeList->BeginUpdate();
  try {
    for (int i; i < Form1->cxTreeList->SortedColumnCount; i++) {
      bool ASortDesc = Form1->cxTreeList->SortedColumns[i]->SortOrder == soDescending;
// changing the sort order of the current column
      Form1->cxTreeList->SortedColumns[i]->SortOrder = (TcxDataSortOrder)((int)(!ASortDesc) + 1);
    }
  } __finally {
    Form1->cxTreeList->EndUpdate();
  }
}