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Bug 2231

Summary:	Duplicated Axes when having multiple Ternary series
Product:	VCL TeeChart	Reporter:	yeray alonso <yeray>
Component:	Series	Assignee:	Steema Issue Manager <issuemanager>
Status:	RESOLVED FIXED
Severity:	enhancement	CC:	marc
Priority:	---
Version:	27.190530
Target Milestone:	---
Hardware:	PC
OS:	Windows
URL:	https://www.steema.com/support/viewtopic.php?f=3&t=17148
Chart Series:	---	Delphi / C++ Builder RAD IDE Version:

Description yeray alonso 2019-08-30 09:54:47 EDT

Just add two TTernarySeries to a chart and you'll see two sets of axes are being drawn:

uses TeeTernary;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Chart1.AddSeries(TTernarySeries).FillSampleValues;
  Chart1.AddSeries(TTernarySeries).FillSampleValues;
end;

Comment 1 yeray alonso 2019-09-03 02:22:27 EDT

A workaround is to hide the VertexTitle and Axes once the first Ternary Series has been drawn using BeforeDrawValues event.
Ie:

uses TeeTernary;

procedure TForm1.FormCreate(Sender: TObject);
var i: Integer;
begin
  for i:=0 to 2 do
    with TTernarySeries(Chart1.AddSeries(TTernarySeries)) do
    begin
      FillSampleValues;

      if i>0 then
      begin
        VertexTitle.Hide;
        BeforeDrawValues:=BeforeDrawSecond;
      end
      else
        BeforeDrawValues:=BeforeDrawFirst;
    end;
end;

procedure TTernarySeriesForm.BeforeDrawFirst(Sender: TObject);
begin
  Chart1.Axes.Visible:=True;
end;

procedure TTernarySeriesForm.BeforeDrawSecond(Sender: TObject);
begin
  Chart1.Axes.Hide;
end;