From: Robert Klemme <shortcutter@...>
Date: 2008-04-22T15:40:03+09:00
Subject: Re: ruby signals

On 21.04.2008 13:09, Robert Dober wrote:
> On Mon, Apr 21, 2008 at 12:49 PM, Martin Vales <martin@opengeomap.org> wrote:
>>  Someone know like connect a signal inside a class??
>>  I am working in ruby gnome, but i thinkl this is a ruby generic
>>  question.
>>
> I have no idea what Gnome really needs but the doc is pretty good IIRC.
>>  class One
>>   def initialize(callback)
>>    callback
>>   end
>>
>>  end
>>
>>  class Main
>>   def initialize
>>    One.new("talk_with_me")
>>   end
>>
>>   def talk_with_me
>>    puts "i am here"
>>   end
>>
>>  end
>>
>>
>>
>>  thanks in advance.
>>  --
>>  Posted via http://www.ruby-forum.com/.
>>
>>
> 
> You could do different things, e.g. call a proc or instance_eval a
> block, as I suspect that you need information of the class I would
> rather instance_eval.
> 
> class Two
>    def initialize &blk
>      instance_eval &blk
>    end
>    def say_hello; puts "hello" end
> end
> 
> Two.new do say_hello end

Here's my - equally Gnome agnostic - suggestion

class Model
  def initialize(&callback)
    @cb = callback
  end

  def some_event
    @cb.call
  end
end

class View
  def initialize
    @md = Model.new { talk_with_me }
  end

  def talk_with_me
    puts "i am here"
  end

end

But also see http://ruby-doc.org/core/classes/Observable.html

Kind regards

	robert