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Bug 2007

Summary:	Null points sometimes drawn when FastLine series has DrawAllPoints=false
Product:	.NET TeeChart	Reporter:	yeray alonso <yeray>
Component:	Series	Assignee:	Steema Issue Manager <issuemanager>
Status:	RESOLVED FIXED
Severity:	enhancement
Priority:	---
Version:	TeeChart for .Net 4.1.2017.10196
Target Milestone:	---
Hardware:	PC
OS:	Windows
URL:	http://www.teechart.net/support/viewtopic.php?f=10&t=16836#p74895
Chart Series:	FastLine	Delphi / C++ Builder RAD IDE Version:

Description yeray alonso 2018-03-02 09:49:31 EST

ind below a simple example reproducing the problems:

- Using DrawAllPointsStyle.FIRST, the first line segment (from 500 to 2000) sometimes is not drawn

- Using DrawAllPointsStyle.MINMAX, the line segment from 2000 to 0 (a null point) sometimes being drawn

Also reproduced in VCL:
http://bugs.teechart.net/show_bug.cgi?id=2006

Also reproduced in Java:
http://bugs.teechart.net/show_bug.cgi?id=2008

  FastLine fast1 = new FastLine(tChart1.Chart);

  fast1.Color = Color.Red;

  tChart1.Aspect.View3D = false;
  tChart1.Legend.Visible = false;

  fast1.DrawAllPoints = false;
  //fast1.DrawAllPointsStyle = DrawAllPointsStyle.First;  // First line segment (from 500 to 2000) sometimes not drawn
  fast1.DrawAllPointsStyle = DrawAllPointsStyle.MinMax;   // Line segment from 2000 to 0 (a null point) sometimes being drawn
  fast1.TreatNulls = TreatNullsStyle.DoNotPaint;

  tChart1.Axes.Bottom.SetMinMax(-1000, 1000);
  tChart1.Axes.Left.SetMinMax(-200, 2500);

  fast1.Add(500);
  fast1.Add(2000);
  fast1.Add(0, Color.Transparent);
  fast1.Add(0);
  fast1.Add(1);
  fast1.Add(0);
  fast1.Add(0);
  fast1.Add(0);
  fast1.Add(0);
  fast1.Add(0);
  fast1.Add(0);