Codejock Developer Community : Transparent UserControl Redraw Bug http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 16 Apr 2026 10:01:36 +0000 Wed, 18 Jun 2008 19:58:11 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=10764 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Transparent UserControl Redraw Bug : Hi Chris,This is the same approach...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=36954&title=transparent-usercontrol-redraw-bug#36954 Author: jpbro
Subject: 10764
Posted: 18 June 2008 at 7:58pm

Hi Chris,

This is the same approach I ended up taking...in my case it is okay because I'm not placing the control on a gradient background (although that was the type of situation that I wanted to have transparency available for). I guess we're stuck with it!
]]> Wed, 18 Jun 2008 19:58:11 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=36954&title=transparent-usercontrol-redraw-bug#36954 <![CDATA[Transparent UserControl Redraw Bug : jpbro wrote:Hi Aaron,Basically,...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=36944&title=transparent-usercontrol-redraw-bug#36944 Author: chrisABC
Subject: 10764
Posted: 18 June 2008 at 2:34pm

Originally posted by jpbro jpbro wrote:

Hi Aaron,

Basically, I am creating my own Label & FlatEdit control combination for use in my projects so that I don't have to add one of each every time (and I get a consistent look, spacing, size, etc...).


I did this. (and I bet every other developer has also done it)

And I found that the standard VB label placed in a User Control loses its transparency. And this is a known "problem".

My solution was horrible.  I look at the screen color when the User Control is drawn and the  set the label background color to match.  Doesn't work for gradient backgrounds.... but in real life it is hardly noticeable.     When I get time I will do it better (or maybe CodeJock will bring out a Control....?)
]]> Wed, 18 Jun 2008 14:34:16 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=36944&title=transparent-usercontrol-redraw-bug#36944 <![CDATA[Transparent UserControl Redraw Bug : Hi, That&#039;s good news If...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35900&title=transparent-usercontrol-redraw-bug#35900 Author: Aaron
Subject: 10764
Posted: 28 May 2008 at 2:49am

Hi,
 
That's good news  If you use a picturebox (in the usercontrol) and add the CJ label to the picturebox, the label does repaint correct (system menu issue you described) 
]]> Wed, 28 May 2008 02:49:53 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35900&title=transparent-usercontrol-redraw-bug#35900 <![CDATA[Transparent UserControl Redraw Bug : Hi Aaron,I don&#039;t desperately...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35870&title=transparent-usercontrol-redraw-bug#35870 Author: jpbro
Subject: 10764
Posted: 27 May 2008 at 11:04am

Hi Aaron,

I don't desperately need transparency on the usercontrol, I just thought it could be useful in the future. Basically, I am creating my own Label & FlatEdit control combination for use in my projects so that I don't have to add one of each every time (and I get a consistent look, spacing, size, etc...). So the windowless workaround won't work in this case.

The good news, I don't need transparency at this point as I have always been adding my usercontrol to a form with the same background colour as the usercontrol...Thanks for working on the problem!
]]> Tue, 27 May 2008 11:04:56 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35870&title=transparent-usercontrol-redraw-bug#35870 <![CDATA[Transparent UserControl Redraw Bug : Oleg, I spoke with Bill yesterday...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35825&title=transparent-usercontrol-redraw-bug#35825 Author: Aaron
Subject: 10764
Posted: 27 May 2008 at 12:33am

Oleg,
 
I spoke with Bill yesterday and they aren't going to solve this bug
Well, now it all depends on CodeJock if this issue is going to be solved.
 
First of all: why does the CJ label looses transparency if put in a usercontrol?
  • A    Don't know
  • B    VB / usercontrol thing
  • C    Because......
Jason,
I don't know if you need the transparency (like in your sample) with a usercontrol and label. The only thing that is working is setting the usercontrol property Windowless to true. In this case the CJ and MS label will be visible / transparent and CJ label will be repainted properly when the system menu is shown. Note: When you have a windowless usercontrol you can not place controls in it. Hope this will work out for you, but then again we have CJ to back us up
 
 
]]> Tue, 27 May 2008 00:33:07 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35825&title=transparent-usercontrol-redraw-bug#35825 <![CDATA[Transparent UserControl Redraw Bug : oleg wrote:Hi, Yes, VB...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35757&title=transparent-usercontrol-redraw-bug#35757 Author: Aaron
Subject: 10764
Posted: 25 May 2008 at 12:17am

Originally posted by oleg oleg wrote:

Hi,
 
Yes, VB don't allow it.  Add standard label...
 
Hi,
 
MS don't allow it. Add no label at all...
 
 
]]> Sun, 25 May 2008 00:17:36 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35757&title=transparent-usercontrol-redraw-bug#35757 <![CDATA[Transparent UserControl Redraw Bug : Hi, Yes, VB don&#039;t allow...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35754&title=transparent-usercontrol-redraw-bug#35754 Author: Oleg
Subject: 10764
Posted: 24 May 2008 at 1:30pm

Hi,
 
Yes, VB don't allow it.  Add standard label...
]]> Sat, 24 May 2008 13:30:49 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35754&title=transparent-usercontrol-redraw-bug#35754 <![CDATA[Transparent UserControl Redraw Bug : Hi Aaron,I&#039;ve attached a...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35751&title=transparent-usercontrol-redraw-bug#35751 Author: jpbro
Subject: 10764
Posted: 24 May 2008 at 11:52am

Hi Aaron,

I've attached a sample project (you may have to change the path to the skin, depending on where you installed your CJ components). Also, if you are using Vista, it seems the bug only occurs when desktop composition is turned off (after compiling the project, right click the EXE and click Properties. Click the Compatibility tab, and select the "Disable Desktop Composition" check box, then click OK and run the app).


I've also noticed another problem (as demonstrated by the Line control on the form) - The CJ Label seems to ignore the Transparent property when it is placed on a Transparent BackStyle UserControl.

uploads/20080524_115205_TransparentBug.zip


]]> Sat, 24 May 2008 11:52:27 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35751&title=transparent-usercontrol-redraw-bug#35751 <![CDATA[Transparent UserControl Redraw Bug : Hi, I wouldn&#039;t mind taking...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35745&title=transparent-usercontrol-redraw-bug#35745 Author: Aaron
Subject: 10764
Posted: 24 May 2008 at 6:42am

Hi,
 
I wouldn't mind taking a look at it, but if I have to do all that and maybe have different settings that would influence the behaviour, it would be better if you upload a sample project.
]]> Sat, 24 May 2008 06:42:25 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35745&title=transparent-usercontrol-redraw-bug#35745 <![CDATA[Transparent UserControl Redraw Bug : It only seems to be a problem...]]> http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35743&title=transparent-usercontrol-redraw-bug#35743 Author: jpbro
Subject: 10764
Posted: 24 May 2008 at 12:01am

It only seems to be a problem (in Vista at least) if you turn of Desktop Composition for the compiled application (Properties > Compatibility tab > Disable Desktop Composition).]]> Sat, 24 May 2008 00:01:28 +0000 http://forum.codejock.com/forum_posts.asp?TID=10764&PID=35743&title=transparent-usercontrol-redraw-bug#35743