Re: Button error

From:

David Wilkinson <no-reply@effisols.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Fri, 12 May 2006 09:39:26 -0400

Message-ID:

<Oy$06lcdGHA.1436@TK2MSFTNGP05.phx.gbl>

liuerbin2000@163.com wrote:

// CDialog.h : interface of the CGASDoc class
class CDialog: public CDialog
{
             ...
public:
        BOOL m_flag_btn0;
        ...

}
void CDiolag::Onreset()
{
        // TODO: Add your control notification handler code here
       m_flag_btn0=TRUE;
        ...
}
void CDiolag::Onbtn0()
{
        // TODO: Add your control notification handler code here
        UpdateData(TRUE);
        if(m_bool_btn0==FALSE)
        {
            MessageBox("btn0 is off");
        }
        if(m_bool_btn0==TRUE)
        {
            MessageBox("btn0 is on");
        }
}

The previous code is above , it run OK!
GetDocement() can return a document pointer , but it is uesd in
VIEW(Is it right?).
How can get a document point in a diaolg?Thank you !

liuerbin:

There are so many typos/errors in your postings, that it's hard to know
what to say. Scott has told you how to get document pointer from
anywhere in your application. However, this "reaching out" from a dialog
is not a good OOP design. The standard MFC paradigm for a modal dialog is:

CGasDoc::OnSomeAction()
{
   CMyDialog dlg;
   dlg.m_flag_btn0 = m_flag_btn0;
   if(dlg.DoModal() == IDOK)
   {
     m_flag_btn0 = dlg.m_flag_btn0;
   }
}

This is not very good OP either (public variables), but the intent is
very clear, and the dialog does not need to access the document.
Modeless dialog is rather more difficult to do correctly.

David Wilkinson