Steema Central

Posted: **Mon Nov 02, 2009 7:36 pm**

I drop a DBchart on a form.
I then Add 20 series.
I add two Seriesgroups, and assign the series 10 to each seriesgroup.
Each series points to its respective datasource.

I then tick one of the two seriesgroups, and the chart then displays correctly at runtime.

Now I try to change the active seriesgroup at runtime, without any effect:
With DBChartBlup do
begin
SeriesGroups.Items[0].Active:=TSeriesGroupActive(1);
SeriesGroups.Items[1].Active:=TSeriesGroupActive(0);
RefreshData;
end;

No matter what I do:
SeriesGroups.Items[0].Active:=TSeriesGroupActive(0);
SeriesGroups.Items[1].Active:=TSeriesGroupActive(0);
or
SeriesGroups.Items[0].Active:=TSeriesGroupActive(1);
SeriesGroups.Items[1].Active:=TSeriesGroupActive(1);

seriesgroups remain at what they where set to in the IDE.

So, how do I achieve this at runtime, without having to set up all the series, and seriesgroups etc at runtime.

Regards

Adrian

Posted: **Tue Nov 03, 2009 9:25 am**

Hi Adrian,

I've taken the code from the demo at All features\Welcome !\Miscellaneous\Series\Series Goups to test it and everything seems to work as expected. What TeeChart exact version are you using?

Code: Select all

uses series;

var  Group1, Group2 : TSeriesGroup;

procedure TForm1.FormCreate(Sender: TObject);
var t : Integer;
    Line : TChartSeries;
begin
 for t:=0 to 9 do
  begin
    Line:=Chart1.AddSeries(TLineSeries);
    Line.Title:='Line '+IntToStr(t);
    Line.FillSampleValues;
  end;

  // Create two "Series Groups", and add some series to each group...
  Group1:=Chart1.SeriesList.AddGroup('First group');
  Group1.Add( Chart1[0] );
  Group1.Add( Chart1[2] );
  Group1.Add( Chart1[4] );
  Group1.Add( Chart1[6] );
  Group1.Add( Chart1[8] );

  Group2:=Chart1.SeriesList.AddGroup('Second group');
  Group2.Add( Chart1[1] );
  Group2.Add( Chart1[3] );
  Group2.Add( Chart1[5] );
  Group2.Add( Chart1[7] );
  Group2.Add( Chart1[9] );

  // Show all series in first group
  Chart1.SeriesList.Groups[0].Show;

  // Hide all series in second group
  Chart1.SeriesList.Groups[1].Hide;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  With Chart1.SeriesGroups do
  begin
    if Items[0].Active = gaYes then
    begin
      Items[0].Active:=gaNo;
      Items[1].Active:=gaYes;
    end
    else
    begin
      Items[0].Active:=gaYes;
      Items[1].Active:=gaNo;
    end;
  end;
end;

Posted: **Wed Nov 04, 2009 8:19 pm**

V8.02.10861

Also note, that I don't want to build the series groups at runtime, but use them as set up in the IDE.
Regards

Adrian

Posted: **Thu Nov 05, 2009 11:08 am**

Hi Adrian,

I've found that at design time adding a series to a group is listed fine but the group doesn't seem to really contain the series:

Code: Select all

procedure TForm1.Button1Click(Sender: TObject);
begin
  Showmessage(inttostr(Chart1.SeriesGroups.Items[0].Series.Count));
end;

On the other hand, having a group created at design time, you can add series at runtime:

Code: Select all

procedure TForm1.Button2Click(Sender: TObject);
  with Chart1.SeriesGroups.Items[0] do //group created at design time
  begin
    Add( Chart1[0] ); 
    Add( Chart1[2] );
  end;
  Showmessage(inttostr(Chart1.SeriesGroups.Items[0].Series.Count));
end;

I've added this to the wish list to be fixed in future releases (TV52014535). In the meanwhile I recommend you to add the series to the groups at runtime if possible.

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