Codejock Developer Community : Transparent checkbox? http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sun, 14 Jun 2026 18:08:20 +0000 Thu, 29 Mar 2007 04:05:24 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=6731 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Transparent checkbox? : Hi, Attach modified project...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21545&title=transparent-checkbox#21545 Author: Oleg
Subject: 6731
Posted: 29 March 2007 at 4:05am

Hi,
 
Attach modified project and I will point what you do wrong.
]]> Thu, 29 Mar 2007 04:05:24 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21545&title=transparent-checkbox#21545 <![CDATA[Transparent checkbox? : It&#039;s not working :(. Even...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21543&title=transparent-checkbox#21543 Author: znakeeye
Subject: 6731
Posted: 29 March 2007 at 3:24am

It's not working :(. Even if I subclass CButton and override WM_CTLCOLOR, as you described, I do not get this message. Neither is it handled in CMyWindow::PreTranslateMessage.
 
WM_CTLCOLOR is not sent to the parent window. What can be the reason for this? This is what I know:
1) My parent window is a modeless dialog (most of the code was taken from CColorSelectorCtrl).
2) My check box is created dynamically in CMyWindow::Create(...).
 
To reproduce this, all you need to do is adding a check box in the color picker control and then try making it transparent.
 
Any ideas? Thanks.
]]> Thu, 29 Mar 2007 03:24:28 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21543&title=transparent-checkbox#21543 <![CDATA[Transparent checkbox? : I&#039;ve done some testing, and...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21501&title=transparent-checkbox#21501 Author: znakeeye
Subject: 6731
Posted: 27 March 2007 at 9:22am

I've done some testing, and it seems that WM_CTLCOLOR is only sent to the parent window if it has been created from a dialog resource. My CWnd-derived class does not receive this message. Do you know the cause of this?
 
Anyway, I will try your solution, though I did not want to create another button class .
 
Thanks for your advice!
]]> Tue, 27 Mar 2007 09:22:26 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21501&title=transparent-checkbox#21501 <![CDATA[Transparent checkbox? : Hi, WM_CTLCOLOR is sent to...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21480&title=transparent-checkbox#21480 Author: Oleg
Subject: 6731
Posted: 27 March 2007 at 1:14am

Hi,
 
WM_CTLCOLOR is sent to parent of button. In button you can catch reflected message:
 
ON_WM_CTLCOLOR_REFLECT()
HBRUSH CMyDerivedWnd::CtlColor(CDC* pDC, UINT nCtlColor)
{
pDC->SetTextColor( m_clrText );    // textpDC->SetBkColor( m_clrBkgnd );    // text bkgndreturn m_brBkgnd;                // ctl bkgnd

}
]]> Tue, 27 Mar 2007 01:14:40 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21480&title=transparent-checkbox#21480 <![CDATA[Transparent checkbox? : Hi, The problem is that WM_CTLCOLOR...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21464&title=transparent-checkbox#21464 Author: znakeeye
Subject: 6731
Posted: 26 March 2007 at 12:04pm

Hi,

The problem is that WM_CTLCOLOR is not received. I've tried to capture WM_CTLCOLORBTN too, with no success.

Here is my code:
 
In the message map of my CWnd-derived class: ON_WM_CTLCOLOR()
 
CMyDerivedWnd::Create(...):
m_button.CreateEx(WS_EX_TRANSPARENT, _T("BUTTON"), _T("&Transparency?"), WS_VISIBLE | WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | BS_CHECKBOX, rcButton, this, IDC_MYBUTTON);
 
HBRUSH CMyDerivedWnd::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
    // Never called... could this be due to the BS_CHECKBOX style?
    return CWnd::OnCtlColor(pDC, pWnd, nCtlColor);
}
 
Any ideas? What am I missing here?
]]> Mon, 26 Mar 2007 12:04:39 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21464&title=transparent-checkbox#21464 <![CDATA[Transparent checkbox? : Hi, in MSDN see WM_CTLCOLOR...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21456&title=transparent-checkbox#21456 Author: Oleg
Subject: 6731
Posted: 26 March 2007 at 10:36am

Hi,
 
in MSDN see WM_CTLCOLOR description/sample.
]]> Mon, 26 Mar 2007 10:36:18 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21456&title=transparent-checkbox#21456 <![CDATA[Transparent checkbox? : I have a CWnd-derived window with...]]> http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21452&title=transparent-checkbox#21452 Author: znakeeye
Subject: 6731
Posted: 26 March 2007 at 9:12am

I have a CWnd-derived window with a black background. Inside this window, I have a checkbox (CButton) with the WS_EX_TRANSPARENT style set. Of course, the rectangle of this checkbox is excluded in CMyWindow::OnPaint, using ExcludeClipRect.
 
Why does my checkbox look like this? How do I make it transparent?
 
 
Thanks!
]]> Mon, 26 Mar 2007 09:12:15 +0000 http://forum.codejock.com/forum_posts.asp?TID=6731&PID=21452&title=transparent-checkbox#21452