TeeChart: How to bring a series to the front - c++builder

Question

IDE: c++ Builder XE5 Update 2
TeeChart Build: 2014.11.140512
I am trying to bring certain series on a TChart component to the front(as you would typically do with a BringToFront() function).
I've done some reading and found the following options/suggestions:
A. Change the ZOrder property of the series.
B. Use TChart.ExchangeSeries()
Using TChart.ExchangeSeries() is not a proper way of changing the z-order of a series. Its primary function is to swap around two series in a TChart component's SeriesList(which then inherently changes the z-order of those series). If you require your series-ordering to be fixed(fixed ordering in SeriesList), then this will not work.
Changing the ZOrder properties of the series delivered better results. However, changing the ZOrder of the first series(Series[0]) apparently does nothing. Series[0] seem to like sitting at the back of the class.
The above might be the result of my implementation. In which case, some more details:
On my TChart component I have multiple series. The series-types can be changed dynamically. The types to which the series can be changed are limited to TLineSeries and TBarSeries.
I always want the TLineSeries at the front.
Any advice on how this can be done?
(Will we ever see that elusive TChartSeries.BringToFront() function?) :)

Answer 1

Any advice on how this can be done?
Looks like mixing series styles and changing ZOrder is not working very well. For example, using this code snippet:
uses Series;
procedure TForm1.FormCreate(Sender: TObject);
begin
Chart1.AddSeries(TLineSeries.Create(Self)).FillSampleValues(10);
Chart1.AddSeries(TLineSeries.Create(Self)).FillSampleValues(10);
Chart1.AddSeries(TBarSeries.Create(Self)).FillSampleValues(10);
Chart1.AddSeries(TBarSeries.Create(Self)).FillSampleValues(10);
Chart1.AddSeries(TBarSeries.Create(Self)).FillSampleValues(10);
end;
procedure TForm1.Button1Click(Sender: TObject);
var i: Integer;
begin
for i:=0 to Chart1.SeriesCount-1 do
begin
Chart1[i].Marks.Visible:=False;
if Chart1[i] is TLineSeries then
Chart1[i].ZOrder:=Chart1.SeriesCount - 1 - i
else
Chart1[i].ZOrder:=i;
end;
end;
Line series are brought to the front but bar series style remain there. I have also tried with bar series StackGroups: However, it doesn't make much of a difference. We'd need StackGroups for line series as well for this work.
(Will we ever see that elusive TChartSeries.BringToFront() function?)
:)
Why not? I have added your request to Steema Software's bugzilla platform: http://bugs.teechart.net/show_bug.cgi?id=853. Feel free to sign up and add yourself to the CC List to receive automatic issue updates.