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Bug 1732 - Two TCursorTool objects on the same TChart become invisible
Summary: Two TCursorTool objects on the same TChart become invisible
Status: RESOLVED WORKSFORME
Alias: None
Product: VCL TeeChart
Classification: Unclassified
Component: Tools (show other bugs)
Version: 20.170306
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Steema Issue Manager
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-12-26 23:12 EST by Al Gonzalez
Modified: 2016-12-28 11:48 EST (History)
0 users

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

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Description Al Gonzalez 2016-12-26 23:12:05 EST 
If you add two TCursorTool controls to same TChart, when the position of the vertical or horizontal lines of both controls match, these matching lines become invisible.

Statements to reproduce the problem with a simple TChart ("Chart1") placed inside a form:

Uses
  VCLTee.Series, VCLTee.TeeTools;

//...

  Chart1.AddSeries (TBarSeries).FillSampleValues;
  Chart1.Tools.Add (TCursorTool);
  Chart1.Tools.Add (TCursorTool);


The four lines intersect at the center of the chart. Move one of them with the mouse and you will see it appear.
Comment 1 Al Gonzalez 2016-12-28 11:47:08 EST 
By Default, TCursorTool paints in "Xor" Mode. The solution is to set FullRepaint property in True.