StateMachine Example

mower_example.rb

require 'rubygems'
require 'statemachine'

class MowerContext
  def cut_mode
		puts "blade start spinning"
	end

	def idle_mode
		puts "engine idling"
  end

	def stop_mode
		puts "completely stopped"
	end

	def chug
		puts "chugging to start"
  end
end	

mower1 = Statemachine.build do 
  state :stopped do
		on_entry :stop_mode
		event :key, :running
		on_exit :chug
	end

	state :running do
		on_entry :idle_mode
		event :key, :stopped
		event :handle, :cutting
  end

	state :cutting do
		on_entry :cut_mode
		event :key, :stopped
		event :handle, :running
  end

  context MowerContext.new
end

puts "===first use==="
puts "turning key"
mower1.key 
puts "using handle"
mower1.handle 
puts "using handle"
mower1.handle 
puts "turning key"
mower1.key

puts "\n===another day==="
puts "turning key"
mower1.key 
puts "using handle"
mower1.handle 
puts "turning key"
mower1.key