Single Document MDI-like interface questions

From:
"Mikel" <mikel.luri_NOSPAM@gmail_NOSPAM.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 23 Jul 2009 14:10:43 +0200
Message-ID:
<emUpd64CKHA.4692@TK2MSFTNGP02.phx.gbl>
Hi all:

I'm creating a single-document MDI-like application. You know, several
different views on a single document, in an MDI framework.
I'd like it to have a CFormView as a main view, where the user can set some
"Project" settings and from which the user can open the other views.

So far, I've created the CFormView MDI app, and changed the "new document"
handling mechanism to close the current document and open a new one, so that
only one document (and one FormView) is open at any time. I've also added
two views, and by following Joe's example in
http://groups.google.es/group/microsoft.public.vc.mfc/browse_thread/thread/d45b65f4b0270946/dcd70f8fb2a91d4e?hl=es&lnk=gst&q=newcomer+Green+View+MDI, I
can open them via a menu handler:

void CMainFrame::OnOpenGreenView()
{
    OpenGreenView();
}

void CMainFrame::OpenGreenView()
{
    if (pGreenViewTemplate == NULL)
    {
        pGreenViewTemplate = new CMultiDocTemplate(IDR_GreeViewTYPE,
            RUNTIME_CLASS(CMyDoc),
            RUNTIME_CLASS(CGreenChildFrm),
            RUNTIME_CLASS(CGreeView));

        CMyDoc* doc = (CMyDoc*)GetCurrentDocument();
        CFrameWnd* frame = pGreenViewTemplate->CreateNewFrame(doc, NULL);
        if (frame != NULL)
        {
            frame->InitialUpdateFrame(doc, TRUE);
        }
    }
}

I have the same for the other view, say RedView.

Now, how can I handle the situation where the user closes the view and later
tries to open it?
Right now it doesn't open, because the MultiDocTemplate is not destroyed.
I've thought of posting a message to the MainFrame when the ChildFrame is
destroyed, so it can destroy the CMultidocTemplate and set it to NULL. Other
idea I've come across is to hide or minimize the ChildFrame instead of
destroying it and when the user tries to open it again, restore it, but I'm
not really sure how to do this.

Another problem is I don't know how to switch to an open view. For example,
the three views are open and maximized, the active one is the FormView, and
the user clicks on "open the GreenView". I'd like it to switch to the one
that's already open. I guess I have to get the ChildFrame from the
CMultiDocTemplate and activate it, but I don't know how to do it, as this is
my first incursion in the MDI world.

And the last, for now: I'd like to open the "Green" and "Red" views in
response to button clicks in the form view, instead of (or in adition to)
menu commands. How should I do this? Send a message to the MainFrame in the
button handler, maybe?

Thanks in advance for your patience. As I said, I'm new to MDI.

Mikel

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