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Contents
module Redcar
class Menu
# A DSL for building menus simply. An example of usage
#
# builder = Menu::Builder.new "Edit" do
# item "Select All", SelectAllCommand
# sub_menu "Indent" do
# item "Increase", IncreaseIndentCommand
# item("Decrease") { puts "decrease selected" }
# end
# end
#
# This is equivalent to:
#
# menu = Redcar::Menu.new("Edit")
# menu << Redcar::Menu::Item.new("Select All", SelectAllCommand)
# indent_menu = Redcar::Menu.new("Indent")
# indent_menu << Redcar::Menu::Item.new("Increase", IncreaseIndentCommand)
# indent_menu << Redcar::Menu::Item.new("Decrease") do
# puts "decrease selected"
# end
# menu << indent_menu
class Builder
attr_reader :menu
def self.build(name=nil, &block)
new(name, &block).menu
end
def initialize(menu_or_text=nil, &block)
case menu_or_text
when String, nil
@menu = Redcar::Menu.new(menu_or_text||"")
when Menu
@menu = menu_or_text
end
@current_menu = @menu
if block.arity == 1
block.call(self)
else
instance_eval(&block)
end
end
def item(text, command=nil, &block)
@current_menu << Item.new(text, command, &block)
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
if block.arity == 1
block.call(self)
else
instance_eval(&block)
end
@current_menu = old_menu
end
def lazy_sub_menu(text, &block)
new_menu = LazyMenu.new(block, text)
@current_menu << new_menu
end
def append(item)
@current_menu << item
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems