A Seperate frame, and a view in it.

wayne.dengel@octel.com
Monday, October 07, 1996

     Environment: VC++ 4.0, NT 4.0, WIn95
     
     Hello,
     
     I am doing the following.  I have an app.  This App creates a seperate 
     frame window.  I am trying to put a CView into this frame.  I DONOT 
     want a DOCUMENT, just a frame with a view.  How do I do this.
     
     I tried to, in my frame, in OnCreateClient, in pContext, do this
        pContext->m_pNewViewClass=RUNTIME_CLASS(CMyView);
     
     It does not work.  It always crashes.
     
     Any ideas on how to do this.  
     
     Thank you for your time.
     
     Wayne

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Sumit Chawla -- schawla@csci.csc.com
Monday, October 07, 1996

[Mini-digest: 5 responses]

Environment: VC++ 4.0, NT 4.0, WIn95
>      
>      Hello,
>      
>      I am doing the following.  I have an app.  This App creates a seperate 
>      frame window.  I am trying to put a CView into this frame.  I DONOT 
>      want a DOCUMENT, just a frame with a view.  How do I do this.
>      
>      I tried to, in my frame, in OnCreateClient, in pContext, do this
>         pContext->m_pNewViewClass=RUNTIME_CLASS(CMyView);
>      
>      It does not work.  It always crashes.
>      
>      Any ideas on how to do this.  
>      
>      Thank you for your time.
>      
>      Wayne
> 
Hi!
I had the same problem. I got around it by using a CCreateContext
object on the stack. Like this:

BOOL
MyFrameWindow::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext*pContext)
{
	CCreateContext context;
	context.m_pCurrentFrame = 0;
	context.m_pNewViewClass = RUNTIME_CLASS(MyView);

	return CFrameWnd::OnCreateClient(lpcs,&context);
} 

-Sumit.
schawla@csci.csc.com
-----From: Steve Mark 

Hi Wayne,

You can use the doc-template architecture to create a view without a
document, as follows:

CMultiDocTemplate mdt(IDR_APPTYPE, NULL, RUNTIME_CLASS(NChildFrame),
RUNTIME_CLASS(NAppView));

CFrameWnd* pfrm = mdt.CreateNewFrame(NULL, NULL);
mdt.InitialUpdateFrame(pfrm, NULL, TRUE);

Steve

-----From: Roger Onslow/Newcastle/Computer Systems Australia/AU

Just curious -- what is the problem with a document?  Many MFC samples have a 
bare minimum (default) document class an all the real work in the app.  It 
seems that the overheads involved in getting the app to work without a document 
are a darn sight more than just letting it a simple bare document class.

In any case, perhaps you are confusing a document with an external file.

A "document" in doc/view architecture is simply the place where you keep the 
data, and the "view" the place where you display/interact with it.  The only 
reason why you would have view without a document would be when there is no 
data -- so what would your view show?  Even in that case, you can have a 
document with no data in it so the model still works.

So what I'm saying is, rather than going out of your way to work around the 
doc/view architecture, why not work with it and make use of all the benefits 
that MFC gives you (like apps that don't crash :-)

Roger Onslow
-----From: NIELS ULL JACOBSEN 
     
As far as I know, you don't. Documents and views are intimately
connected. Either have a dummy document or create a frame window with
a plain CWnd in it. Just create it in OnCreateClient, ignoring the pContext.


-----From: Simon Salter 

What I do is to have the view as a child of the frame. So in 
OnCreate() of the frame I put (error handling omitted)

m_pView = new CMyView;
Crect crInit(0,0,0,0);
m_ pView ->Create(NULL,_T(""),dwWndStyle,crInit,this,nID,NULL);

Then you'll need some house keeping, in particular in the frames 
OnSize() you will probably want to size your view and so on.

Simon

---

Dave_Rabbers@Quinton-Eng.CCMAIL.CompuServe.COM
Wednesday, October 09, 1996

     
Use a DocTemplate with a NULL pointer to a document runtime class.
This has been covered in much detail recently.  Look in the list archives for 
more specifics.

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Subject: A Seperate frame, and a view in it.
Author:  INTERNET:wayne.dengel@octel.com at CSERVE
Date:    10/7/96 3:11 PM


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