A game launcher by Ruby/GTK3.

bricks_meet_balls-gtk.rb

require "gtk3"
require "bricks_meet_balls"

class GameButton < Gtk::Button
  PROPERTIES = [
    "num_of_rows",
    "num_of_columns",
    "num_of_balls",
    "ball_images",
    "brick_images",
    "background_image",
    "endless",
  ]

  PROPERTIES.each do |property|
    attr_accessor property
  end

  attr_accessor :width, :height

  def initialize
    super(:label => "Game Start")
    signal_connect("clicked") do
      Thread.new do
        @game = BricksMeetBalls::Window.new(width, height)
        PROPERTIES.each do |property|
          value = __send__(property)
          @game.__send__("#{property}=", value) if value
        end
        @game.show
      end
    end
  end
end

class NumberInputEntry < Gtk::Box
  def initialize(game_button, target, default=0)
    super(:horizontal)

    label = Gtk::Label.new
    label.text = target.gsub(/_/, " ")
    add(label)

    entry = Gtk::Entry.new
    entry.text = default.to_s
    game_button.send("#{target}=", default)
    entry.max_length = 3
    entry.signal_connect("changed") do
      text = entry.text
      game_button.__send__("#{target}=", text.to_i) if /[0-9]+/ =~ text
    end
    pack_end(entry)
  end
end

class FileChooser < Gtk::Box
  def initialize(game_button, target)
    super(:horizontal)
    label = Gtk::Label.new
    title = target.gsub(/_/, " ")
    label.text = title
    add(label)
    chooser = Gtk::FileChooserButton.new(title, :open)
    chooser.signal_connect("selection-changed") do
      filename = chooser.filename
      game_button.__send__("#{target}=", filename) unless filename.empty?
    end
    pack_end(chooser)
  end
end

class EndressCheckButton < Gtk::CheckButton
  def initialize(game_button, default=false)
    super("endless")
    game_button.endless = default
    signal_connect("toggled") do
      game_button.endless = (self.active? ? true : false)
    end
  end
end

class ControlWindow < Gtk::Window
  def initialize
    super
    self.title = "Control Window"
    signal_connect("destroy") do
      Gtk.main_quit
    end

    vbox = Gtk::Box.new(:vertical)
    add(vbox)

    game_button = GameButton.new
    vbox.add(game_button)
    vbox.add(NumberInputEntry.new(game_button, "width", 640))
    vbox.add(NumberInputEntry.new(game_button, "height", 480))
    vbox.add(NumberInputEntry.new(game_button, "num_of_rows", 10))
    vbox.add(NumberInputEntry.new(game_button, "num_of_columns", 8))
    vbox.add(NumberInputEntry.new(game_button, "num_of_balls", 29))
    vbox.add(FileChooser.new(game_button, "ball_images"))
    vbox.add(FileChooser.new(game_button, "brick_images"))
    vbox.add(FileChooser.new(game_button, "background_image"))
    vbox.add(EndressCheckButton.new(game_button))
  end
end

window = ControlWindow.new
window.show_all

Gtk.main