CSplitterWindow flicker when resizing

[Nathan Going]

I've created a CSplitterWindow that works perfectly except when resized. My Code[^] I use SetWindowPos to move the splitter as my "view" is resized, while sizing there is alot of flicker. How does the CSplitterWindow update it's panes when the splitter is moved so smoothly? Any suggestions would be greatly appreciated. Thanks, Nathan

[led mike]

Nathan Going wrote:

How does the CSplitterWindow update it's panes

Not sure what you mean. Everything in windows get's painted more or less the same way, in response to a WM_PAINT message. Perhaps you can rephrase your question for clarity?

led mike

[Nathan Going]

Ok, start with the CSplitterWindow, if you move the splitter bar left or right, both panes are resized smoothly using a set of calls to SetWindowPos internally. Now I have the CSplitterWindow created as a child of another CWindow derived "View". I catch the WM_SIZE event and call SetWindowPos to set the new size of the CSplitterWindow, when this happens it appears that the entire window gets redrawn, producing a "flicker" effect. In my "view" window, I catch the WM_ERASEBKGND message so it doesn’t happen; also I handle WM_PAINT so I can draw a margin around the CSplitterWindow. I'm trying to find a way to resize the entire window and at the same time reduce the flickering of the contents as much as possible. Thank you.

[Alain Rist]

Hi Nathan, Replace DECLARE_WND_CLASS(xx) in your frame and intermediate windows by DECLARE_WND_CLASS_EX(xx, 0, -1); BTW your layout is much too complicated. Just paint what you want in your frame window and override the default CFrameWindowImplBase::UpdateLayout() to compute the position of your client window. cheers, AR