Module: Clevic::Emitter::ClassMethods

Defined in:
lib/clevic/emitter.rb

Instance Method Summary collapse

Instance Method Details

#emitter(emitter_name) ⇒ Object 



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# File 'lib/clevic/emitter.rb', line 11

def emitter( emitter_name )
  line, st = __LINE__, <<-EOF
    def #{emitter_name}_listeners
      @#{emitter_name}_listeners ||= Set.new
    end

    # If msg is provided, yield to stored block.
    # If block is provided, store it for later.
    def emit_#{emitter_name}( *args, &notifier_block )
      if block_given?
        #{emitter_name}_listeners << notifier_block
      else
        puts "emit_#{emitter_name} called with " + args.inspect
        #{emitter_name}_listeners.each do |notify|
          notify.call( *args )
        end
      end
    end

    def remove_#{emitter_name}( &notifier_block )
      #{emitter_name}_listeners.delete( notifier_block )
    end
  EOF
  class_eval st, __FILE__, line + 1
end