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Bug 1202 - TColorGridSeries causes Access Violation when filled with a DataSet
Summary: TColorGridSeries causes Access Violation when filled with a DataSet
Status: RESOLVED FIXED
Alias: None
Product: VCL TeeChart
Classification: Unclassified
Component: Series (show other bugs)
Version: 150120
Hardware: PC Windows
: High critical
Target Milestone: ---
Assignee: Steema Issue Manager
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-05-05 00:39 EDT by Nelson Henrique Corrêa Nepomuceno
Modified: 2015-05-11 05:25 EDT (History)
2 users (show)

See Also:
Chart Series: ---
Delphi / C++ Builder RAD IDE Version: RAD XE, RAD XE7

Attachments
Bugreport generated by madExcept and source code of a simple test application (9.17 KB, application/zip)
2015-05-05 00:39 EDT, Nelson Henrique Corrêa Nepomuceno 		Details
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Description Nelson Henrique Corrêa Nepomuceno 2015-05-05 00:39:30 EDT 
Created attachment 438 [details]
Bugreport generated by madExcept and source code of a simple test application

Access violation occurs when I fill a TColorGridSeries using a DataSet.

The trouble started after I update TeeChart 2010 to TeeChart 2015 in Delphi XE1 Pro.
I made an application to simplify error case, removing all irrelevant elements. DataSet are involved in problem. I tested and problem occurs using TSimpleDataSet, TSQLQuery and TClientDataSet. I suppose problem occurs with any DataSet.

Problem occurs at method DrawGrid in unit TeeSurfa.

I attached a test application and the bugreport generated by madExcept.

Thanks in advance

Best regards.
Comment 1 Nelson Henrique Corrêa Nepomuceno 2015-05-07 13:50:38 EDT 
I tested and problem occurs in Delphi XE7 Enterprise too. You can test using the same attached test application source code.
Comment 2 david berneda 2015-05-11 04:19:18 EDT 
Confirmed. 

The problem happens when the colorgrid pen is visible, because the grid values aren't totally complete. There are grid cells missing.

Disabling it is a workaround until the bug is fixed:

lsOc.Pen.Hide;
Comment 3 david berneda 2015-05-11 05:25:21 EDT 
Fixed. The fix is at TeeSurfa.pas unit, DrawGrid procedure, there are two places:

      if tmpGrid<0 then
      begin
        if Length(GridIndex[tmpIndex])>tmpIndex then // <----- This line
           tmpGrid:=GridIndex[tmpIndex,tmpIndex];

        if tmpGrid<0 then
           tmpGrid:=0;
      end;