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From: bruce@atncpc.UUCP (Bruce Henderson)
Newsgroups: comp.sys.next
Subject: Re: Deleting Menu Cells
Summary: An answer
Keywords: Help
Message-ID: <272@atncpc.UUCP>
Date: 7 Jun 90 16:27:29 GMT
References: Deleting Menu Cells <266d6c7b.40b2@petunia.CalPoly.EDU>
Distribution: usa
Organization: Ashton Tate NCPC, San Jose, CA.
Lines: 85

In article <266d6c7b.40b2@petunia.CalPoly.EDU>, ebostick@polyslo.CalPoly.EDU (Edward Bostick) writes:
> 
> 
>  I'm working on a NeXT application and I have a submenu that
> I would like to remove menu cells form.  I can disable, enable,
> add, sizeToFit, update, and free, but I cannot get the actual
> cell to disappear form the submenu.  I have look through the 
>                   Edward S. Bostick (ebostick@polyslo.calpoly.edu)

yeah, this used to get me, and I still forget it occasionally.  I usually make it work like this:

- removeMenuCell:theMenu :(int)cellNum
{
	id matrix;

	[theMenu disableFlushWindow];   /* this gets rid of nasty flicker */
	matrix = [theMenu itemList];
	[matrix removeRowAt:cellNum andFree:YES];	
	/* ^ deletes the unwanted cell... */
	[theMenu sizeToFit];	/* adjust menu to new size */
	[[theMenu reenableFlushWindow] flushWindow];
	/* don't forget the above line, if you do you menu will */
	/* be hozed forever, and it will never hilight again!   */
	return self;
}

This should rip out any unwanted menu Items, providing you know it's 
number.  If you only have the cell's title, you can do this:

- removeMenuCell:theMenu name:(const char*)cellTitle
{

	int		 i, count;
	id 		 matrix, cells;
	id 		 cell;
	const char*	 title;


	/* once again we will disable window flushing so that */
	/* we don't have screen flicker during the operation  */
	/* the reason this works, remember a menu is a subclass */
	/* of window						*/

	[theMenu disableFlushWindow];
	matrix = [theMenu itemList];

	/* next we will need the list of cells... */
	
	cells = [matrix itemList];

	/* and the number of cells in the matrix (you'll see why) */

	count = [cells count];

	/* now we will walk the list comparing titles */

	for(i = 0; i < count; i++)
	 {       
	   cell = [cells objectAt:i];
	   title = [cell title];
	   if(s && !strcmp(s, cellTitle)
	    {
 	      [remove RowAt:i andFree:YES];
              break;
	    }
	 }
	
	/* now resize the menu */
	[theMenu sizeToFit];
	
	/* re-enable the window flushing */

	[[theMenu reenableFlushWindow] flushWindow];

	return self;
}

If you still have problem, E-Mail me and we'll figureit out.
I hope this work [sorry if any of you netters think this is really boring
and old hat, but I do remember the exciting days when I was still new 
to the machine, and it all seemed like wonderful magic.]

Bruce Henderson
User Interface KGB
Ashton - Tate NeXTeam