Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!apple!portal!sv!news
From: leonardr@svc.portal.com (Leonard Rosenthol)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Sublaunching ???
Message-ID: <1990Dec13.051911.28265@svc.portal.com>
Date: 13 Dec 90 05:19:11 GMT
References: <1990Dec11.004705.20759@dhw68k.cts.com> <1990Dec12.155057.5967@eng.umd.edu> <1990Dec12.193848.14629@engin.umich.edu>
Sender: news@svc.portal.com
Reply-To: leonardr@svc.portal.com (Leonard Rosenthol)
Organization: Software Ventures Corporation.
Lines: 31

In article <1990Dec12.193848.14629@engin.umich.edu>,
mystone@mondo.engin.umich.edu (Dean Yu) writes:
>   When you double-click on a document in the Finder and the application which
> created that document is already running, MultiFinder switches it into the
> foreground.  MultiFinder then searches your menus for an Open item in the
> File menu.  If you don't have an Open in the standard place, MultiFinder
> looks for 'mstr' and 'mst#' resources in the application to tell it where the
> Open item is.
>   Once it finds that item, it calculates where on the screen that item would
> be if the menu were pulled down.  It posts a mouseDown event in the menu bar
> over the menu title, and a mouseUp event over the menu item.  A patch on
> _MenuSelect is installed so you don't see the menu pop down briefly.
>   A patch is also installed on _Pack3 (Standard File).  This patch doesn't
> bring up the Standard File dialog, but simply returns an SFReply record
> containing information for the document you double clicked on in the Finder.
>   That's all there is to it!
> 
	Since I have never seen the MF code, I can't say whether you are
completely correct, Dean, but I do know that when I have reimplemented this
for a 'launching utility', I didn't bother with the item location.
	Due to the presence of the _MenuSelect patch, you only need to post
the mouseDown into the menu bar, causing the app to call MenuSelect, and
then your patch can just return whatever it wants - no need for the item
calculation!  The _Pack3 patch does indeed work as noted.

--
----------------------------------------------------------------------
+ Leonard Rosenthol              | Internet: leonardr@sv.portal.com  +
+ Software Ventures              | GEnie:    MACgician               +
+ MicroPhone II Development Team | AOL:      MACgician1              +
----------------------------------------------------------------------