Contents

module Redcar
  class Menu
    # A DSL for building menus simply. An example of usage
    #
    #     builder = Menu::Builder.new do
    #       sub_menu "File" do
    #         item "New", NewCommand
    #       end
    #       sub_menu "Help" do
    #         item "Website", WebsiteCommand
    #       end
    #     end
    #
    # This is equivalent to:
    # 
    #     menu = Redcar::Menu.new
    #     file_menu = Redcar::Menu.new("File") 
    #     help_menu = Redcar::Menu.new("Help")
    #     menu << file_menu
    #     menu << help_menu
    #     file_menu << Redcar::Menu::Item.new("New", NewCommand)
    #     help_menu << Redcar::Menu::Item.new("Website", WebsiteCommand)
    class Builder
      attr_reader :menu
      
      def initialize(&block)
        @menu = Redcar::Menu.new
        @current_menu = @menu
        instance_eval(&block)
      end
      
      private
      
      def item(text, command)
        @current_menu << Item.new(text, command)
      end
      
      def separator
        @current_menu << Item::Separator.new
      end
      
      def sub_menu(text, &block)
        new_menu = Menu.new(text)
        @current_menu << new_menu
        old_menu, @current_menu = @current_menu, new_menu
        instance_eval(&block)
        @current_menu = old_menu
      end
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
redcar-0.3.0dev	plugins/application/lib/application/menu/builder.rb
redcar-0.2.9dev	plugins/application/lib/application/menu/builder.rb