date:20090922

Making the Text in a Text Cell change color when the Rows Checkbox has been checked.

2009-09-22 Thread Joshua Garnham

I have a NSOutlineView and I want to make the text for a row change color when 
the check box on that row has been checked.
How would I do that?

Thanks.




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Re: Oh notification, where are you?

2009-09-22 Thread Michael Thon



On Sep 22, 2009, at 3:03 AM, Rob Keniger wrote:



On 22/09/2009, at 2:31 AM, Michael Thon wrote:


NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self
   selector:@selector(sendNotification:)
   name:@NSMetadataQueryDidFinishGatheringNotification
 object:nil];
[myThread start];

In the sendNotification: method I send the notification to the  
other thread using performSelector: onThread: however  
sendNotification: is never even called.  Either the notifications  
are not, in fact being sent to the main thread or I'm doing  
something else wrong.  There is probably something basic about  
threads or notifications that I don't understand but I have run out  
of ideas about what to try next.



NSMetadataQueryDidFinishGatheringNotification is a string constant,  
so you should use it directly and not put it inside the @ string  
literal container:


NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
[nc addObserver:self
   selector:@selector(sendNotification:)
   name:NSMetadataQueryDidFinishGatheringNotification
 object:nil];



@Rob - thanks for pointing that out

I did find the problem - my thread needs a runloop in order to process  
notifications.  Following this fellow's blog post:

http://confuseddevelopment.blogspot.com/2006_10_01_archive.html
I added 	CFRunLoopRun(); after starting the metadataquery.  Inside the  
method that gets called to process the notification I added:  
CFRunLoopStop(CFRunLoopGetCurrent ()); to stop the runloop.





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Re: Making the Text in a Text Cell change color when the Rows Checkbox has been checked.

2009-09-22 Thread Kyle Sluder

On Mon, Sep 21, 2009 at 11:10 PM, Joshua Garnham joshua.garn...@yahoo.co.uk
 How would I do that?

You have a habit of asking these sorts of questions.  What have you tried?

http://www.whathaveyoutried.com

--Kyle Sluder
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Re: an app that never quits

2009-09-22 Thread Erick Calder

On Sep 21, 2009, at 1:21 PM, Sixten Otto wrote:

On Mon, Sep 21, 2009 at 4:15 PM, Erick Calder e...@arix.com wrote:
ok, perhaps there's another way I can solve my problem. I have a
little app
called Trapster that uses something called push technology... I
think what
it means is that some server can send my app a signal and even
though the

app isn't running all the time, it gets woken up and responds to the
message... can anyone point me to a howto?

The Push Notification Service Programming Guide is here:

http://developer.apple.com/iphone/library/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Introduction/Introduction.html

Be advised, though, that push notifications are really directed at the
*user*. Yes, the alerts you can push provide a convenient way for the
user to start up your app (and your app is specifically informed of
that), but this isn't like waking up a daemon process on the device.
Your app can still only run in the foreground, and only at the
discretion of the user, and will still be quit when the user is done
with it. (Users can also turn off the push alerts entirely.)

wow. ok. I guess that's not going to help much then. I must say
that without daemons the range of applications possible seems rather
quite narrow to me.

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