Re: Posting messages from one CFormView to another in a TabCtrl

From:

"Doug Harrison [MVP]" <dsh@mvps.org>

Newsgroups:

microsoft.public.vc.mfc

Date:

Sun, 06 Jul 2008 14:25:27 -0500

Message-ID:

<ii6274pk0g4kbpgo2sugulb3ufcmo2jukj@4ax.com>

On Sun, 6 Jul 2008 12:08:35 -0700 (PDT), newbee <c.sunita@gmail.com> wrote:

Hi,

I have a tab control in a dialog. All the tabs are derived from
CFormView.
If something control is changed in tab view1, I want to update a
control in tab view2 whenever tab2 gets displayed, and vice versa.
What is the best way of doing this? How do I post a message from view1
to view2, and how do I handle it in view2, and the opposite?

Thanks.

Use the Observer Pattern:

http://en.wikipedia.org/wiki/Observer_pattern

This frees the generator of the event from needing to know anything about
the observers of the event, and the observers receive only what they need
to know in the form of function arguments.

A quick and dirty solution is to consider the pages related at a deep
level, such that when your tab control switches pages, the new page can
look into the content of the other pages. A slightly more refined
abstraction would make the tab control the mediator of the information
exchange between pages.

--
Doug Harrison
Visual C++ MVP