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Versions: 19
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Contents
module CyberarmEngine
module Event # Gets included into Element
def subscribe(event, method = nil, &block)
handler = method || block
@event_handler[event] << handler
Subscription.new(self, event, handler)
end
def unsubscribe(subscription)
end
def publish(event, *args)
raise ArgumentError, "#{self.class} does not handle #{event.inspect}" unless @event_handler.include?(event)
return unless enabled?
if respond_to?(event)
return :handled if send(event, self, *args) == :handled
end
@event_handler[event].reverse_each do |handler|
return :handled if handler.call(self, *args) == :handled
end
return nil
end
def event(event)
@event_handler ||= Hash.new
@event_handler[event] ||= []
end
end
class Subscription
attr_reader :publisher, :event, :handler
def initialize(publisher, event, handler)
@publisher, @event, @handler = publisher, event, handler
end
def unsubscribe
@publisher.unsubscribe(self)
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems