Steema Central

Delphi 2005 TChart Source V7.02 - not Open GL. .NET 1.1 SP1
1) Surface series while rotating will show Black&White wireframe sometimes, keep scrolling and it comes good again then back to black & white.
Sometimes it partially draws correctly with the other part in B&W wireframe.
2) Also drag another window over the TChart and an error sometimes pops up saying CANVAS DOES NOT ALLOW DRAWING.
3) Furthermore, play with rotating a surface series while running code through the debugger and you'll get a message "Out of Resources"

I have screenshots if you would like them.

Any ideas?
Thank you in advance.
Jon

Hi Jon,

Delphi 2005 TChart Source V7.02 - not Open GL. .NET 1.1 SP1

Then you'd better post those kind of messages at the VCL forums.

1) Surface series while rotating will show Black&White wireframe sometimes, keep scrolling and it comes good again then back to black & white.
Sometimes it partially draws correctly with the other part in B&W wireframe.
2) Also drag another window over the TChart and an error sometimes pops up saying CANVAS DOES NOT ALLOW DRAWING.
3) Furthermore, play with rotating a surface series while running code through the debugger and you'll get a message "Out of Resources"

I haven't been able to reproduce those problems. Do you have Delphi 2005 Upgrade 1 installed?

I have screenshots if you would like them.

Yes please, could you post them at the steema.public.attachments newsgroups? Additionaly, could you also post a small example we can run "as-is" to reproduce the problem here?

It is the .NET 7.02 version of TChart we are using, NOT VCL. Just not in Open GL mode was what I meant.

D2005 with update 1 installed ok.

I'll try and put together a .NET app to show what happens.

We have been looking into what makes .NET code slow recently and have found SetLength() to be a particularly bad culprit.

I'll put the screenshots on steema.public.attachments newsgroup.

Jon

Regarding posting the screen shots, cant see "steema.public.attachments" under Newsgroups sorry.

Hi JonM,

You can find this newsgroup configuring news://www.steema.net in a newsreader.

All,

Delphi Guru Brian Long (www.blong.com) and ourselves have been battling with GDI memory leaks and crashes in Delphi .NET for some time now. We have since discovered some problems with the Garbage collection and resourse problems which will be fixed in UP2.

This is great news and will hopefully help TChart.
Did you know a new Brush, Pen etc object is created internally just by changing the Width property?? Hence MASSIVE overloading of resources which are not collected quickly enough by the GC. This is now fixed and handles are reused.

Narcis - if you like we can forward some of our emails to you.
Ive a good feeling about UP2.


Jon

Hi Jon,

Thank you very much for the information. In case this update is released we will release a TeeChart update for it.