From: Joel VanderWerf <vjoel@...>
Date: 2006-05-27T02:18:03+09:00
Subject: Re: FXRuby - Howto remember some default settings as specified by the user ?

Nuralanur@aol.com wrote:
> Dear all,
>  
> in an FXRuby GUI, I want to give the user many choices and I am  searching for
> a way to let FXRuby remember these upon the next start of the GUI  
> application.

This is what I use with FXRuby (but it's not dependent on FXRuby or even
on GUI):

http://redshift.sourceforge.net/preferences/

A simple example (in terms of a hypothetical GUI lib):

  require 'preferences'

  PREFS = Preferences.new("/tmp/prefs")

  class Window
    attr_accessor :x, :y
    def initialize
      PREFS.register_pref_key self, "my app/window"
      PREFS.register_pref_var self, :x, :y => "default_y"
    end

    def run
      @x = 7 # emulate user's interaction
    end
  end

  Window.new.run
  PREFS.save

An example is in examples/foursplit-prefs.rb. It remembers the positions
of two four-splitters.

It includes an optional method to make a reasonable cross-platform guess
of where preference files should be (e.g. APPDATA on win32).

The storage format is YAML, of course.

-- 
      vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407