Re: Disable a Menu Item

From:
Hoop <jcollett@oshtruck.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Wed, 28 Nov 2007 12:04:02 -0800 (PST)
Message-ID:
<f04f7021-d20c-47b5-b8d7-5bf2ef46187b@t47g2000hsc.googlegroups.com>
On Nov 28, 1:18 pm, "Scott McPhillips [MVP]" <org-dot-mvps-at-
scottmcp> wrote:

"Hoop" <jcoll...@oshtruck.com> wrote in message

news:b88588cb-870a-43f0-bbf4-ccf458d713f8@r60g2000hsc.googlegroups.com...

Hi,
For this MFC app that I am maintaining there is a menu item that I
would like to disabled, grey-out, at runtime if a certian condition is
met. From reading previous posts on similar questions I have tried,

CMenu *pMenu = GetMenu();
   pMenu->EnableMenuItem(ID_SEARCH_TRUCK_INFO, MF_GRAYED |
MF_BYCOMMAND);

This compiles and runs but does not do anything.

In another post I came across it was suggested to do the below. How is
the code below actually used? Called?

void CMainFrame::OnUpdateMenuItem1(CCmdUI* pCmdUI)
{
   /*
   bool bEnable = ... ; true if it need to enable menu item
                        or false othewise.
   bool bCheck = ... ;
   */

   // ...

   pCmdUI->Enable(bEnable); // if needed
   pCmdUI->SetCheck(bCheck); // if needed
   pCmdUI->SetText("Text"); // if needed
}

Thanks
Jeff


Your second example, OnUpdate...., is a feature of the MFC document/view
architecture framework. The OnUpdate... functions are called just before
the menu is displayed, and/or during idle time. Use this approach if you
are using doc/view, because it overrides anything you try and do with CMenu
functions.

--
Scott McPhillips [VC++ MVP]- Hide quoted text -

- Show quoted text -


Hi Scott,
I am using doc/view. So I would add something like,

afx_msg void OnUpdateMenuItem(CCmdUI* pCmdUI);
and the method definition, as in my first post.
How I would actually call this, as a function call, without a message
map entry, or do I need that?
The argument CCmdUI, not sure what I would put in there.
Thanks
Jeff

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