View Full Version : multiple windows with MFC?

05-17-2001, 06:30 AM
I have searched through these boards and have not yet found the answer to my problem....

Currently I have an application with a mainwindow and a dialog bar down the side. The main window supports opengl. I want to be able to add a small opengl window to the dialog bar but have not yet achieved success. Does anyone know of any sample code that shows something similar. I am not using the doc-view architecture.

Do I have to use an RC that was created in my mainwindow class in the dialog bar class, or can I create a new RC in the dialog bar class and use it as well.(with the appropriate calls to wglMakeCurrent)

05-17-2001, 06:52 AM
Well, each window must have it's own RC. Period. So create a new one and use wglMakeCurrent.

I think that's all you really wanted to know?


05-17-2001, 10:27 AM
Thanks for the info.
I was finally able to create and render to these 2 different windows. Now, I am having a problem with resizing. If I resize (ie hit the min/max buttons) The main window is fine, but the new smaller window doesnt seem to be getting the WM_SIZE message. Any more hints?

05-17-2001, 10:30 AM
Well, my suggestion is that in the parent window (the frame window), you explicitly SendMessage WM_SIZE with the proper parameters to each child window.


05-17-2001, 10:50 AM
I had tried to send a WM_SIZE message. In my previous post, I forgot to mention that the problem I am having is that when I resize the window, the smaller window does not redraw the scene. It does color the background, but the scene is not there.

I thought it might have been because OnSize() was not being called, but I explicitly sent this message and still had no success. In fact,now when I send the message in the Parent's OnSize(), it does not even draw the scene the first time.

05-17-2001, 02:24 PM
Welcome to MFC hell http://www.opengl.org/discussion_boards/ubb/smile.gif Read up on message passing in msdn mfc section. This is the reason I dumped MFC and went with win32 and I thank the lucky stars for having a sence to do this early on. Resizing is a piece of cake in win32, send a message to status bar and toolbar and you're done. Very transparent and not shrouded in gazillion message passings or deeply rooted in corner of mfc source code http://www.opengl.org/discussion_boards/ubb/smile.gif Splitter bars are also evil.

Go to www.crosswinds.net/~blueorbsoftware/index.html (http://www.crosswinds.net/~blueorbsoftware/index.html) and check out 3d editor screen shot page. Not as nice looking as mfc but functional and coded very quickly.