From: HIDAKA Takahiro <cv8t-hdk@...>
Date: 2001-11-22T03:40:03+09:00
Subject: [ruby-talk:26056] FXRuby:: replacement to enum method.

Hi,

I'd like to propose replacement of enum method.

  module Responder
    # define class method klass.message_id(*syms)
    def Responder.append_features(klass)
      klass.instance_eval %{
        def message_id(*syms)
          id = superclass::ID_LAST
          syms.each { |sym|
            const_set(sym, id)
            id += 1
          }
          const_set(:ID_LAST, id)
        end
      }
      super
    end
  end

This defines class method klass.message_id(*syms) when
classes include Responder module. So, we can write like below.

  class MyWindow < FXMainWindow
    include Responder               # define MyWindow::message_id method.
    message_id :ID_OPEN, :ID_SAVE   # define constants MyWindow::ID_OPEN
and ID_SAVE
    
    def initialize
      FXMAPFUNC(SEL_COMMAND, ID_OPEN, "onOpen")
      FXMAPFUNC(SEL_COMMAND, ID_SAVE, "onSave")
      FXMAPFUNC(SEL_UPDATE, ID_SAVE, "onUpdateSave")
    end
  end

--
HIDAKA Takahiro