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Bug 1946

Summary:	tnIgnore TreatNulls draws the line segments in white
Product:	VCL TeeChart	Reporter:	yeray alonso <yeray>
Component:	Series	Assignee:	Steema Issue Manager <issuemanager>
Status:	CONFIRMED ---
Severity:	enhancement	CC:	bert.kreisel, tjarrault
Priority:	---
Version:	22.170619
Target Milestone:	---
Hardware:	PC
OS:	Windows
URL:	http://www.teechart.net/support/viewtopic.php?f=3&t=16727
Chart Series:	Line	Delphi / C++ Builder RAD IDE Version:

Description yeray alonso 2017-11-17 10:05:04 EST

When having TreatNulls as tnIgnore, the segments drawn before null point are drawn, but they are drawn in white.

Also, when there are two consecutive null points, the first pointer is also drawn in white.


procedure TForm1.FormCreate(Sender: TObject);
var i: Integer;
begin
  Chart1.View3D:=False;
  Chart1.Legend.Visible:=False;
  Chart1.Color:=clGrayText;
  Chart1.Gradient.Visible:=False;
  Chart1.Walls.Visible:=False;
  Chart1.Axes.Left.Grid.Visible:=False;
  Chart1.Axes.Bottom.Grid.Visible:=False;

  with Chart1.AddSeries(TLineSeries) as TLineSeries do
  begin
    Pointer.Visible:=True;
    TreatNulls:=tnIgnore;

    for i:=0 to 8 do
      if (i=2) or (i=3) or (i=6) then
         AddNull(10)
      else
         Add(5);
  end;

  Chart1.Axes.Left.SetMinMax(0,15);
end;