Category: Components
Title: Move items in a listbox
Date added: 15.03.2006
Hits: 2242


procedure LbMoveItemUp(AListBox: TListBox);
var
  CurrIndex: Integer;
begin
  with AListBox do
    if ItemIndex > 0 then
    begin
      CurrIndex := ItemIndex;
      Items.Move(ItemIndex, (CurrIndex - 1));
      ItemIndex := CurrIndex - 1;
    end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  LbMoveItemUp(ListBox1);
end;

procedure LbMoveItemDown(AListBox: TListBox);
var
  CurrIndex, LastIndex: Integer;
begin
  with AListBox do
  begin
    CurrIndex := ItemIndex;
    LastIndex := Items.Count;
    if ItemIndex <> -1 then
    begin
      if CurrIndex + 1 < LastIndex then
      begin
        Items.Move(ItemIndex, (CurrIndex + 1));
        ItemIndex := CurrIndex + 1;
      end;
    end;
  end;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  LbMoveItemDown(ListBox1);
end;

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