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  How can I draw the chart quickly and prevent twinkle?
Posted by Tony on Feb-17-2015 15:33
Hi all,


I want to draw a Simple Area Chart and update the picture quickly(50ms).

but it has twinkle during update time.

How can I draw the chart quickly and prevent twinkle?

thanks for help.

  Re: How can I draw the chart quickly and prevent twinkle?
Posted by Peter Kwan on Feb-18-2015 01:03
Hi Tony,

Would you mind to clarify which programming language edition of CharDirector and the GUI
framework you are using?  (Eg. C++/MFC, C++/Qt, .NET Windows Forms, Java SWING, ...).

The ChartDirector download includes some realtime sample code. As far as I know, they do
not flicker (twinkle), even if they are configured to refresh quickly. Have you tried to modify
those sample code to increase the update speed and do they flicker (twinkle)?

We are aware for ChartDirector for C++ released before Apr 2014, certain C++/MFC project
configuration may cause it to flicker (eg. a project configured to include XP theme support).
This issue has already been fixed since Apr 2014, so it should not occur in the latest version
on our web site.

If you can provide a simple example (may be just to modify the realtime chart sample code
to the update rate you want) that can illustrate the problem, it can help us to diagnose the
problem.

Regards
Peter Kwan