Binding should work through Interface Builder, but I was only speaking of the example in the original post. Traditional-style attr_writers invoked by Ruby code bypass key-value observers, but it seems intuitive to me to allow them to notify observers given how pervasive key-value coding is in Cocoa, and that the infrastructure is implemented in the base class for every object in the MacRuby runtime. Best, Jeremy Voorhis On Fri, May 15, 2009 at 12:42 AM, Thilo <thilo@upstream-berlin.com> wrote:
Isn't it already working? At least for primitiv types?
Eg. when I bind a label to a Int property which i change with a slider bind to the same property i don't need additional code for KVO.
Cheers Thilo
On 13.05.2009 22:31 Uhr, Jeremy Voorhis wrote:
I've created a ticket at https://www.macruby.org/trac/ticket/252. I might be wrong as I am still grokking the Objective-C runtime, but it seems to me that this should be easy to implement if attr_accessor and attr_writer generate the setKey: method first and then implement #key= in terms of setKey:. Is there some requirement that key-value setter methods return void, or is that just by convention?
Best,
Jeremy
On Wed, May 13, 2009 at 12:00 PM, Laurent Sansonetti <lsansonetti@apple.com> wrote:
Hi Jeremy,
That's a pretty good idea! Could you file a bug on the tracker so that we do not forget about it?
Thanks, Laurent
On May 12, 2009, at 10:18 AM, Jeremy Voorhis wrote:
Hello,
I've been learning Cocoa, Objective-C and macruby in tandem and I was just wondering, are there any plans to integrate the key-value observing protocol with the attr_accessor family of methods? With a little experimentation, I found KVO is definitely possible with macruby, but the syntax is less than ideal (transcript made with the 0.4 release).
~ % macirb
class Notifier attr_accessor :value end
=> nil
class Observer def observeValueForKeyPath(path, ofObject:object, change:change, context:context) puts change end end
=> nil
n = Notifier.new
=> #<Notifier:0x8005e91a0>
n.addObserver(Observer.new, forKeyPath:'value', options:0, context:nil)
=> nil
n.value = 42
=> 42
n.setValue 42
{"kind"=>1} => nil
Best,
Jeremy Voorhis _______________________________________________ MacRuby-devel mailing list MacRuby-devel@lists.macosforge.org http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
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