[MacRuby-devel] Strange behaviour when using a Proc for a callback
Joshua Ballanco
jballanc at gmail.com
Thu Feb 3 07:47:40 PST 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 at 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 at marketcircle.com
>
>
>
> _______________________________________________
> MacRuby-devel mailing list
> MacRuby-devel at lists.macosforge.org
> http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>
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