Re: [MACTCL] Preferences dialog and other apple event handlers

[Philip A. <ph...@vc...>]

On Wednesday, Jan 19, 2005, at 03:17 America/Vancouver, Alastair Davies 
wrote:

> One needs explicitly to enable the "Preferences..." menu item using 
> the command [1]:

> EnableMenuCommand(NULL, kHICommandPreferences);

> This call can be made in TkMacOSXInitMenus() for example (in the file 
> tkMacOSXMenus.c).  If the Tcl procedure ::tk::mac::ShowPreferences is 
> not defined, however, having the menu item enabled is not a good 
> thing, so this is not a general-purpose patch.  Ideally, I suppose, a 
> Tcl variable could be created to provide script access to enable or 
> disable the menu item.

If the menu item is enabled, you might be able to handle it on a case 
by case basis by installing a tclAE handler for aevt/pref. The Carbon 
behavior (in 10.2 and newer I think) is that if the event is not 
handled, it then falls thru to an AppleEvent handler. The AppleEvent 
fails gracefully.

In TclOSA 1.0.3 <http://homepage.mac.com/philip_aker/osa/osa.html>, 
this event falls thru to an alert saying that the app has no prefs if 
there is no script assigned to the menu item.

HTH,

Philip Aker
http://www.aker.ca