Bridge pattern

bridge.rb

class Window
	def initialize
		# Implementor selection strategy
		extend [WindowsAPI, X11API].sample
	end

	def drawRectangle
		4.times { drawLine }
	end
end

class TitledWindow < Window
	def drawTitle
		drawText 'This is my title'
	end
end

class BorderWindow < Window
	def drawBorder
		drawRectangle
		drawText 'Border window description'
	end
end

module WindowsAPI
	def drawLine
		puts 'This is a Windows line'
	end

	def drawText(text)
		puts "Windows text: #{text}"
	end
end

module X11API
	def drawLine
		puts 'This is an X11 line'
	end

	def drawText(text)
		puts "X11 text: #{text}"
	end
end

TitledWindow.new.drawTitle
puts
BorderWindow.new.drawBorder