Re: [MacRuby-devel] Strange behaviour when using a Proc for a callback

3 Feb 2011


      Looks like a bug with the way the Cocoa object is boxed. Can you file it at
https://www.macruby.org/trac/newticket ?

Cheers,

Josh

On Wed, Feb 2, 2011 at 8:51 PM, Mark Rada <mrada@marketcircle.com> wrote:
...
Hi,
I was trying to setup an async callback using a proc instead of a method to
register for app launching notifications. For some reason, when I use the
proc method, I get the wrong object passed to the proc
when it gets called.
The version using a method callback:
framework 'Cocoa'
def callback notif
         puts notif.class
         puts notif.inspect
         puts notif.userInfo.inspect
       end
def launch_mail
         workspace = NSWorkspace.sharedWorkspace
workspace.notificationCenter.addObserver self,
                                         selector:'callback:',
name:NSWorkspaceDidLaunchApplicationNotification,
                                           object:nil
workspace.launchAppWithBundleIdentifier 'com.apple.mail',
                                         options:NSWorkspaceLaunchAsync,
                  additionalEventParamDescriptor:nil,
                                launchIdentifier:nil
       end
launch_mail
       NSRunLoop.currentRunLoop.runUntilDate( Time.now + 5 )
That code will work the way that I expected it to, but if I try to use a
proc:
framework 'Cocoa'
callback = Proc.new { |notif|
         puts notif.class
         puts notif.inspect
         puts notif.userInfo.inspect
       }
workspace = NSWorkspace.sharedWorkspace
workspace.notificationCenter.addObserver callback,
                                       selector:'call:',
name:NSWorkspaceDidLaunchApplicationNotification,
                                         object:nil
workspace.launchAppWithBundleIdentifier 'com.apple.mail',
                                       options:NSWorkspaceLaunchAsync,
                additionalEventParamDescriptor:nil,
                              launchIdentifier:nil
NSRunLoop.currentRunLoop.runUntilDate( Time.now + 5 )
It will crash because for some reason I am not getting the notification
back as I should, instead I am getting a reference to the NSDictionary
class.
I don't think this is the intended behaviour in MacRuby, but I'm not sure
if what I am trying to do is supported.
Is the ability to use a proc as a callback a supported feature? It has
worked for me in other cases.
Mark Rada
mrada@marketcircle.com
_______________________________________________
MacRuby-devel mailing list
MacRuby-devel@lists.macosforge.org
http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel

Re: [MacRuby-devel] Strange behaviour when using a Proc for a callback

Joshua Ballanco