View Issue Details

IDProjectCategoryView StatusLast Update
0006582JEDI VCL00 JVCL Componentspublic2021-09-05 09:30
ReporterKyle_KatarnAssigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
Status newResolutionopen 
Product Version3.48 
Target VersionFixed in Version 
Summary0006582: TJvBitBtn wrong rendering when parent form has DoubleBuerring set to True
DescriptionTJvBitBtn wrong rendering when parent form has DoubleBuerring set to True
TagsNo tags attached.



2017-08-07 19:42

reporter   ~0021433

DoubleBuerring => DoubleBuferring


2017-10-29 15:22

reporter   ~0021439

Do you need more details ?


2018-07-18 15:59

administrator   ~0021534

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.


2018-07-19 22:26

reporter   ~0021564

I'm using JCL v2.8 (6000) with JVCL daily from 2016-08-04 (> 3.49)


2018-10-28 17:14

reporter   ~0021583

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.


2018-10-28 17:45

reporter   ~0021588

That's the version i'm using and problem occurs then.


2019-03-07 21:09

reporter   ~0021616

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?


2019-03-07 21:23

reporter   ~0021619

Isn't this the last release ? What are the current version number for JCL, JVCL ?


2019-04-17 22:55

reporter   ~0021718

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.


2019-04-17 22:56

reporter   ~0021719

Another thing: do you have screenshots of correct rendering (without double buffering) and of incorrect rendering?


2019-04-20 18:56

reporter   ~0021724

I'll check next time I update JVCL and my test apps.
Can't you reproduce the problem ?

2019-04-22 19:54 (53,801 bytes)


2019-04-22 19:57

reporter   ~0021727


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?


2019-04-25 20:45

reporter   ~0021735

Did you already check my test program? Does it show your error?


2019-05-04 11:43

reporter   ~0021800

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?


2020-05-19 10:21

administrator   ~0021921

Any news?


2020-05-20 09:36

reporter   ~0021933

I'll test later. Please keep it as "feedback requested". Thanks !

Any new release of JVCL / JCL on its way ?


2021-06-04 12:01

administrator   ~0021969

There is not going to be any "official" release for the foreseeable future because a release is just a zip of the Github content anyway, without any special checks.


2021-09-04 14:26

reporter   ~0021999

Kyle_Katarn, did you meanwhile look at the test application I provided? Can you check in which way it differs from your use of that component? Because I couldn't reproduce it back then.


2021-09-05 09:30

reporter   ~0022004

No, i'll revert my DoubleBuffering settings in my projects and see if problem persists.

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
2020-05-19 10:21 obones Note Added: 0021921
2020-05-20 09:36 Kyle_Katarn Note Added: 0021933
2020-05-20 09:36 Kyle_Katarn Status feedback => new
2021-06-04 12:01 obones Status new => feedback
2021-06-04 12:01 obones Note Added: 0021969
2021-09-04 14:26 mh Note Added: 0021999
2021-09-05 09:30 Kyle_Katarn Note Added: 0022004
2021-09-05 09:30 Kyle_Katarn Status feedback => new