Responding to menu items
Responding to menu items
- Subject: Responding to menu items
- From: Darrin Cardani <email@hidden>
- Date: Tue, 23 Sep 2003 16:19:02 -0500
I'm working on my first Cocoa application. I've been going through
Aaron Hillegass' book "Cocoa Programming for Mac OS X", and it's got
a lot of good information in it. I'm a long time PowerPlant user, so
I may just not be seeing the way Cocoa handles things, but I'm a
little confused about something. (Or I just may not have gotten to
the chapter where this is described in more detail, yet.)
I have my MainMenu.nib file, which contains just my menu bar and
related menu resources. Then I have my MyDocument.nib file which
contains my document's object and window. The window contains an
NSMovieView, and I have a menu item called "Open Movie...". I would
like to present the user with an open file dialog, allow them to
choose the movie, and display the chosen movie in the NSMovieView. I
have something which works, but it seems a tad convoluted to me.
The problem is that in my mind, I should have a method called
something like "openMovie" in my MyDocument class, and choosing the
"Open Movie..." menu item should send the openMovie message to my
document class. However, the MyDocument object is in MyDocument.nib
and the menu item is in MainMenu.nib, so I can't make a connection
between them in Interface Builder. I could put them into 1 nib file,
but presumably, that's not the way it's done. I could also hook them
up programmatically, but I suspect that's more work than I really
need to do.
What I've done is create an AppController class, and added that to
MainMenu.nib. It receives the openMovie message, then uses the shared
document controller to get the current document and forwards the
message to it. Is this the standard way of doing things? Is there a
more direct way to do things? Am I going to need an AppController in
most of my applications, which will do this sort of message
forwarding?
Thanks,
Darrin
--
Darrin Cardani - email@hidden
President, Buena Software, Inc.
<
http://www.buena.com/>
Video, Image and Audio Processing Development
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