Re: document class

From:
mfc <mfcprog@googlemail.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Thu, 23 Sep 2010 03:45:43 -0700 (PDT)
Message-ID:
<ca9e1519-4cf0-4028-ba4b-525f04f3b15a@g10g2000vbc.googlegroups.com>
my class CMIAppView : public CFormView is now complete free from every
class - except the document class.

void CMIAppView::OnInitialUpdate()
{
     CFormView::OnInitialUpdate();

    //start http, thread from the document class in the init method
    GetDocument()->Init();

                 //get information from the xml file for the view at
startup
    CStringArray *m_XmlUserList = GetDocument()->GetDocData(0);

                 //update all controls with this Array

                //maybe its also a good decision to get the font of
each view also from the document
                m_ViewFont = GetDocument()->GetFont();
}

Next function is the OnUpdate() -> to update all view controls as well
as the font - only a small installation.

void CMIAppView::OnUpdate(CView* pSender, LPARAM lHint, CObject*
pHint )
{

    if(lHint == 0 && pHint == NULL)
    { /* do nothing */
        CFormView::OnUpdate(pSender, lHint, pHint);
        return;
    } /* do nothing */

    switch(lHint)
    {
    //setfont for this view
    case CMIAppDoc::SetFont:
        break;

                 case CMIAppDoc::SetControls:
                          //pHint will be a CStringList including all
params for all view controls
                                 break;

    default:
        ASSERT(FALSE);
        return;
    }
}

now talking about the doc class::

class CMIAppDoc : public CDocument
{
protected:
    CMIAppDoc();
    DECLARE_DYNCREATE(CMIAppDoc)

public:

                 typedef enum {

        SetFont = 1,
        SetControls = 2,
    }DocRequests;

protected:

                 CXmlFile XmlFile;
                 CNetwork m_network;
                 CDisplay m_display;

protected:
    DECLARE_MESSAGE_MAP()

}

As you can see, I`ve still a member variable of each class (CDisplay,
CNetwork, CXmlFile) in the document class, because I don`t know where
I have to install these members and how do I access their specific
classes... It would be nice if you could show me a small example for
e.g. the CDisplay class.

BOOL CMIAppDoc::OnNewDocument()
{
    if (!CDocument::OnNewDocument())
        return FALSE;

               // specify xml file name
               CString strFileName (_T("userdata.xml"));

                //load xml data from CXmlFile Class
               if(XmlFile.LoadUserXml(strFileName))
                   return FALSE;

             //init brightness (stored in the xml file)
             POSITION pos = XmlFile.FindIndex(CMIAppDoc::Brightness);
             CString bright = XmlFile.GetAt(pos);
             m_display.Init(bright);

   return TRUE;
}

BOOL CMIAppDoc::Init(void)
{

     //start http thread (called from OnInitialUpdate())
     m_network.InitThread();

}

The next method will be called if the client user has changed some
settings by the webserver or by the display menue. CStringList slist
includes the new information.

BOOL CMIAppDoc::SetParam(CStringList& slist, UINT nbr)
{
   switch(nbr)
   {
   case SET_NETWORK:

            //set new network params
            if(!(m_network.SetParam(slist)))
                   return FALSE; //error during set network params

           break;

   case SET_DISPLAY:

          if(!(m_display.SetParam(slist);))
              return FALSE;

         break;

     default:
        ASSERT(false);
       return FALSE;

      }
}

This function will be called, if the user sends a get message to the
webserver: -> we need the required information which were displayed on
this page from the xml file. For example, the user called the page
where he can change the display settings, the list-Array will include
all these information.

CStringArray* CMIAppDoc::GetArray(UINT nbr)
{
    return(XmlFile.GetXmlData(nbr));
}

best regards
Hans

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