wwDBGrid的标题栏能在排序时显示一个正三角或倒三角图标吗

Question

ip3000可以我想2000也可以
看看demo由例子

Answer 1

procedure TForm_main.wwGrid_mailCalcTitleImage(Sender: TObject;
  Field: TField; var TitleImageAttributes: TwwTitleImageAttributes);
begin
    if Field.FieldName=DM_client.wwCDS_mail.indexname then
      TitleImageAttributes.imageIndex:= 6
    else
      if  Field.FieldName+'_Desc'=DM_client.wwCDS_mail.indexname then
        TitleImageAttributes.imageIndex:= 5
      else
      TitleImageAttributes.imageIndex:= -1
end;