Re: wm_message

From:

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>

Newsgroups:

microsoft.public.vc.mfc

Date:

Sat, 31 Mar 2007 20:26:43 -0400

Message-ID:

<#N37kR$cHHA.4032@TK2MSFTNGP02.phx.gbl>

Al wrote:

I have been trying to rewrite some code in a attempt to write vc++ correctly.
Anyway I have a SDI application. The class info headers are in the doc
object, the dialog headers are in the view object. Hopefully correct so far.
Now I want to initiate a dialog object for teams and display the teams
already saved in the doc. I have been reading Joseph's essays on "dialog box
and control design",but still alittle confused. I am thinking that I should
write:
CTeams * info =
CLTeams *)GetParent()->SendMessage(UWM_QUERY_Teams);
in the OnInitDialog(), in the dialog.
Then register the message and declare a variable. I am not familar with wm_
so do I add these to the dialog class and exacly how do I get a pointer from
doc to view to dialog? I am not seeing it yet.
And if I have a CTypedPointerArray of teams in my doc class and I get the
pointer of this object to the dialog object can I do deleting and adding from
the dialog object? And lastly when I close the dialog object will it affect
the array in some way like deleting it? I will continue reading but wouldn't
mind a little help also.

Thanks Al

Why make the dialog work so hard when your view can easily initialize
the dialog class with the data pointer that it needs:

CSomeDialog dlg();
dlg.m_info = GetDocument()->m_info;
if (dlg.DoModal() == IDOK)
{ copy changed info
}

Now the dialog has the pointer when it starts. With this pointer it can
do anything supported by the object. But should it? If this dialog has
the usual Cancel button then the dialog should not make any changes to
the document data (so the data will be undisturbed if the user selects
Cancel). In such a case, you would make a new array in the dialog and
copy it to the document array only if the dialog returns IDOK.

--
Scott McPhillips [VC++ MVP]