ScrollWindowEx causes flickering!

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   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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znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Topic: ScrollWindowEx causes flickering! 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.
	PokerMemento - http://www.pokermemento.com/

znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Posted: 11 September 2009 at 5:17am
	Removing the call to ScrollWindow alltogether solves the problem. stupid :P
	PokerMemento - http://www.pokermemento.com/