[Lazarus] How to create a chart in code?

[Felipe Monteiro de Carvalho]

Hello,

I am trying to use TAChart, so I dropped TChart in my form and I added
some code to draw some lines:

var
  LineSeries: TLineSeries;
  i, j: Integer;
begin
  for i := 0 to Length(Model.PoliticalParties) - 1 do
  begin
    LineSeries := TLineSeries.Create(Application);
    for j := 0 to Length(Model.PoliticalParties[i].ElectionPools)-1 do
      LineSeries.AddXY(j, Model.PoliticalParties[i].ElectionPools[j]);
    chartPools.Series.List.Add(LineSeries);
  end;
end;

But then it crashes here:

procedure TCustomChartSeries.GetGraphBounds(var ABounds: TDoubleRect);
begin
  GetBounds(ABounds);
  with ABounds do begin
    TransformByAxis(FChart.AxisList, AxisIndexX).UpdateBounds(a.X,
b.X); <---- crash
    TransformByAxis(FChart.AxisList, AxisIndexY).UpdateBounds(a.Y, b.Y);
    if IsRotated then begin
      Exchange(a.X, a.Y);
      Exchange(b.X, b.Y);
    end;
  end;
end;

Any ideas how I should add some lines to the chart instead?

The wiki is down, by the way.

thanks,
-- 
Felipe Monteiro de Carvalho