Class: Bowline::Observable

Inherits:
Object show all
Defined in:
lib/bowline/observer.rb

Defined Under Namespace

Classes: Event

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Observable

Returns a new instance of Observable.



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# File 'lib/bowline/observer.rb', line 33

def initialize
  @listeners = {}
end

Instance Method Details

#append(event, method = nil, &block) ⇒ Object 



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# File 'lib/bowline/observer.rb', line 37

def append(event, method = nil, &block)
  event = Event.new(self, event, method||block)
  (@listeners[event] ||= []) << event
  event
end

#call(event, *args) ⇒ Object 



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# File 'lib/bowline/observer.rb', line 43

def call(event, *args)
  return unless @listeners[event]
  @listeners[event].each do |callback|
    callback.call(*args)
  end
end

#clear ⇒ Object 



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# File 'lib/bowline/observer.rb', line 62

def clear
  @listeners = {}
end

#remove(event, value = nil) ⇒ Object 



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# File 'lib/bowline/observer.rb', line 50

def remove(event, value=nil)
  return unless @listeners[event]
  if value
    @listeners[event].delete(value)
    if @listeners[event].empty?
      @listeners.delete(event)
    end
  else
    @listeners.delete(event)
  end
end