list view column width 0 in oncreate after handle creation

Original Reporter info from Mantis: BeniBela @benibela

• Reporter name: Benito van der Zander

Description:

Here the column width is always 0 regardless of the designer settings:

procedure TForm1.FormCreate(Sender: TObject);
var
  i, sum: Integer;
begin
  Canvas.GetTextHeight('Hm,.|');;
  sum := 0;
  for i := 0 to ListView1.ColumnCount - 1 do
    sum := sum + ListView1.Column[i].Width;
  caption := IntToStr(sum);
end;

Additional information:

in my actual project it is even worse: reading width, sets width to 0, but it does not happen anywhere else

Mantis conversion info:

• Mantis ID: 34044
• Build: Lazarus 1.8.1 r55664M FPC 3.1.1
• Fixed in revision: r59047 (#5102a773)