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From: e4ajwake@augean.ua.OZ.AU (Wakefield)
Newsgroups: comp.sys.amiga.tech
Subject: Problem with Menu Events
Keywords: Menu Events
Message-ID: <906@augean.ua.OZ.AU>
Date: 30 Aug 90 05:52:20 GMT
Lines: 76

Dear Gurus, (or similar)

I have a problem with intuition returning the address of a menu item when
the item causes an event.  The code that I am using is shown below, cut down
of course.

The file "menu.h" contains all the menu and screen etc structures required to
run the program.  I have previously been using the class & code fields to
extract the menu item, and used switch statements to recover the menu item
and call the apporpriate function (replaced here by printf's).

However it seems that it should be possible to use the code outlined below to
do this more efficently and simply.

The problem:

The address field of the message structure is alays ZERO!!!

Questions:

Is what I am trying to do possible ?
Has anyone out there done this before ?
Does anyone have some sample code ?
Is there a simple solution ?

Now the code...


#include "menu.h"

void HandleEvent();

main()

{
   APTR address;
   struct IntuiMessage *message;

   for(;;) {
      Wait(1L << MyWindow1->UserPort->mp_SigBit);

      while(message = (struct IntuiMessage *)
                         GetMsg(MyWindow1->UserPort))
         {
            address = message->IAddress;
            ReplyMsg(message);
            HandleEvent(address);
         }
   }

void HandleEvent(object)
APTR object;
{
  if (object == (APTR)&MenuItem8) { printf("about function\n"); return; }
  if (object == (APTR)&MenuItem9) { printf("quit function\n"); return; }
}

Notes:
------
MenuItem8 is the about item.
MenuItem9 is the quit item.

these both have values which are non zero and seem reasonable, so I think
that they are OK.


Mail any hints/abuse/suggestions/code/etc... to

e4ajwake@augean.ua.oz.au

Thanks in advance

Alex Wakefield.

( Electronic & Electrical Engineering Dept, )
( University of Adelaide, South Australia.  )