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ID Category Severity Reproducibility Date Submitted Last Update
0006582 [JEDI VCL] 00 JVCL Components minor have not tried 2017-08-07 19:41 2019-05-04 11:43
Reporter Kyle_Katarn View Status public  
Assigned To
Priority normal Resolution open  
Status feedback   Product Version 3.48
Summary 0006582: TJvBitBtn wrong rendering when parent form has DoubleBuerring set to True
Description TJvBitBtn wrong rendering when parent form has DoubleBuerring set to True
Additional Information
Tags No tags attached.
Attached Files zip file icon [^] (53,801 bytes) 2019-04-22 19:54

- Relationships

-  Notes
Kyle_Katarn (reporter)
2017-08-07 19:42

DoubleBuerring => DoubleBuferring
Kyle_Katarn (reporter)
2017-10-29 15:22

Do you need more details ?
obones (administrator)
2018-07-18 15:59

Could you check if the issue is still present in the latest GIT content? If yes, please provide the zipped sources of an application showing this.
Kyle_Katarn (reporter)
2018-07-19 22:26

I'm using JCL v2.8 (6000) with JVCL daily from 2016-08-04 (> 3.49)
mh (reporter)
2018-10-28 17:14

Hello Kyle,
the question was not which version you were using. it was whether it is still the case in the most current one (it may have been fixed meanwhile) and if it's not fixed you should please provide a small sample application.
Kyle_Katarn (reporter)
2018-10-28 17:45

That's the version i'm using and problem occurs then.
mh (reporter)
2019-03-07 21:09

Hello Kyle,
I got which version you are using just fine. The request was, that you should update your JCL/JVCL version to the current one in order to check if this issue still happens. Would you be so nice to do this?
Kyle_Katarn (reporter)
2019-03-07 21:23

Isn't this the last release ? What are the current version number for JCL, JVCL ?
mh (reporter)
2019-04-17 22:55

I don't know about the version number, but currently there is a little bit of fixing activity going on, so the Github repositiory got a few commits over the last few days.

That is no new release via GetIt yet or so, but sice you posted a version number back in September last year, that is surely not the newest one. For Rio a new one was issued I guess.
mh (reporter)
2019-04-17 22:56

Another thing: do you have screenshots of correct rendering (without double buffering) and of incorrect rendering?
Kyle_Katarn (reporter)
2019-04-20 18:56

I'll check next time I update JVCL and my test apps.
Can't you reproduce the problem ?
mh (reporter)
2019-04-22 19:57


I attached my test project now but I cannot reproduce your vaguely described issue. The JvBitBtn has ParentDoubleBuffered := false and neither toggling the DoubleBuffered property at runtime nor at design time (and then running the program) makes any difference. For simplicity matters I set the butoon kind to OK button.

My system is a Windows 10 64 Bit VM, running Rio 10.3 Update 1.
Anything my demo doesn't do as your application?
Can you please provide screenshots of a the correct and the wrong appearance of the same JvBitBtn?
mh (reporter)
2019-04-25 20:45

Did you already check my test program? Does it show your error?
mh (reporter)
2019-05-04 11:43

Kyle_Katarn, can you run my test program I attached and tell us whether it shows the issue or if not whether there are differences to your use case?

- Issue History
Date Modified Username Field Change
2017-08-07 19:41 Kyle_Katarn New Issue
2017-08-07 19:42 Kyle_Katarn Note Added: 0021433
2017-10-29 15:22 Kyle_Katarn Note Added: 0021439
2018-07-18 15:59 obones Note Added: 0021534
2018-07-18 15:59 obones Status new => feedback
2018-07-19 22:26 Kyle_Katarn Note Added: 0021564
2018-10-28 17:14 mh Note Added: 0021583
2018-10-28 17:45 Kyle_Katarn Note Added: 0021588
2019-03-07 21:09 mh Note Added: 0021616
2019-03-07 21:23 Kyle_Katarn Note Added: 0021619
2019-04-17 22:55 mh Note Added: 0021718
2019-04-17 22:56 mh Note Added: 0021719
2019-04-20 18:56 Kyle_Katarn Note Added: 0021724
2019-04-22 19:54 mh File Added:
2019-04-22 19:57 mh Note Added: 0021727
2019-04-25 20:45 mh Note Added: 0021735
2019-05-04 11:43 mh Note Added: 0021800

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