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Bug 2008 - Null points sometimes drawn when FastLine series has DrawAllPoints=false
Summary: Null points sometimes drawn when FastLine series has DrawAllPoints=false
Status: RESOLVED FIXED
Alias: None
Product: Java TeeChart
Classification: Unclassified
Component: Series (show other bugs)
Version: unspecified
Hardware: PC Windows
: --- enhancement
Target Milestone: ---
Assignee: Steema Issue Manager
URL: http://www.teechart.net/support/viewt...
Keywords:
Depends on:
Blocks:
 
Reported: 2018-03-02 09:49 EST by yeray alonso
Modified: 2021-04-15 09:59 EDT (History)
2 users (show)

See Also:
Chart Series: FastLine
Delphi / C++ Builder RAD IDE Version:

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Description yeray alonso 2018-03-02 09:49:40 EST 
Find 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 .NET:
http://bugs.teechart.net/show_bug.cgi?id=2007

  FastLine fast1 = new FastLine(tChart1.getChart());
  
  tChart1.getAspect().setView3D(false);
  tChart1.getLegend().setVisible(false);
            
  fast1.setDrawAllPoints(false);   
  //fast1.setDrawAllPointsStyle(DrawAllPointsStyle.FIRST);  // First line segment (from 500 to 2000) sometimes not drawn
  fast1.setDrawAllPointsStyle(DrawAllPointsStyle.MINMAX);  // Line segment from 2000 to 0 (a null point) sometimes being drawn
  fast1.setTreatNulls(TreatNullsStyle.DONOTPAINT);

  tChart1.getAxes().getBottom().setMinMax(-1000, 1000);
  tChart1.getAxes().getLeft().setMinMax(-200, 2500);
  tChart1.getAxes().getBottom().getGrid().setVisible(false);
  tChart1.getAxes().getLeft().getGrid().setVisible(false);
        
  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);
Comment 1 marc meumann 2018-03-23 11:54:58 EDT 
now fixed in NET, porting changes to other environments
Comment 2 christopher ireland 2021-03-03 06:50:44 EST 
Status changed to CONFIRMED, as the code added to the source causes a performance degradation as reported in this defect:
http://bugs.teechart.net/show_bug.cgi?id=2405

This code will have to be revised.
Comment 3 yeray alonso 2021-04-15 09:59:59 EDT 
I'm closing this as the code is now in sync with TeeChart .NET.