Codejock Developer Community : ScrollWindowEx causes flickering! http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Thu, 14 May 2026 00:20:11 +0000 Fri, 11 Sep 2009 05:17:56 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=15156 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[ScrollWindowEx causes flickering! : Removing the call to ScrollWindow...]]> http://forum.codejock.com/forum_posts.asp?TID=15156&PID=52930&title=scrollwindowex-causes-flickering#52930 Author: znakeeye
Subject: 15156
Posted: 11 September 2009 at 5:17am

Removing the call to ScrollWindow alltogether solves the problem. *stupid* :P]]> Fri, 11 Sep 2009 05:17:56 +0000 http://forum.codejock.com/forum_posts.asp?TID=15156&PID=52930&title=scrollwindowex-causes-flickering#52930 <![CDATA[ScrollWindowEx causes flickering! : I&#039;ve created a CWnd-derived...]]> http://forum.codejock.com/forum_posts.asp?TID=15156&PID=52928&title=scrollwindowex-causes-flickering#52928 Author: znakeeye
Subject: 15156
Posted: 11 September 2009 at 4:32am

I've created a CWnd-derived window with scrollbars. In both OnVScroll and OnHScroll I call ScrollWindowEx(..., SW_INVALIDATE) to update my view.
 
The problem is that vertical scrolling causes extreme flickering (WS_CLIPCHILDREN and WS_CLIPSIBLINGS are set, CS_VREDRAW and CS_HREDRAW are not set). Using CXTMemDC and returning FALSE from OnEraseBkgnd (tried TRUE too).
 
SB_THUMTRACK causes the flickering... I have to somehow improve the redraw mechanism.
 
Please help.
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