example13_high_scores.rb

#!/usr/bin/env ruby
require 'rubygems' rescue nil
$LOAD_PATH.unshift File.join(File.expand_path(__FILE__), "..", "..", "lib")
require 'chingu'
include Gosu
include Chingu

#
# Demonstrating Chingus HighScoreList-class
# I couldn't keep myself from spicying it up some though  :P
#
class Game < Chingu::Window
  def initialize
    super(640,400)
    self.input = {:esc => :exit, :a => :add }
    self.caption = "Example of Chingus HighScore class"
    
    @title = PulsatingText.create("HIGH SCORES", :x => $window.width/2, :y => 50, :size => 70)
    
    #
    # Load a list from disk, defaults to "high_score_list.yml"
    # Argument :size forces list to this size
    #
    @high_score_list = HighScoreList.load(:size => 10)

    #
    # Add some new high scores to the list. :name and :score are required but you can put whatever.
    # They will mix with the old scores, automatic default sorting on :score
    #
    10.times do
      data = {:name => "NEW", :score => rand(10000)}
      
      position = @high_score_list.add(data)
      if position
        puts "#{data[:name]} - #{data[:score]} got position #{position}"
      else
        puts "#{data[:name]} - #{data[:score]} didn't make it"
      end
    end
    
    create_text
  end
  
  def add
    data = {:name => "NEW", :score => @high_score_list.high_scores.first[:score] + 10, :text => "from example13.rb"}
    position = @high_score_list.add(data)
    puts "Got position: #{position.to_s}"
    create_text
  end
  
  def create_text
    Text.destroy_if { |text| text.size == 20}
    
    #
    # Iterate through all high scores and create the visual represenation of it
    #
    @high_score_list.each_with_index do |high_score, index|
      y = index * 25 + 100
      Text.create(high_score[:name], :x => 200, :y => y, :size => 20)
      Text.create(high_score[:score], :x => 400, :y => y, :size => 20)
    end    
  end
end

#
# colorful pulsating text...
#
class PulsatingText < Text
  traits :timer, :effect
  
  def initialize(text, options = {})
    super(text, options)
    
    options = text  if text.is_a? Hash
    @pulse = options[:pulse] || false
    self.rotation_center(:center_center)
    every(20) { create_pulse }   if @pulse == false
  end
  
  def create_pulse
    pulse = PulsatingText.create(@text, :x => @x, :y => @y, :height => @height, :pulse => true, :image => @image, :zorder => @zorder+1)
    colors = [Color::RED, Color::GREEN, Color::BLUE]
    pulse.color = colors[rand(colors.size)].dup
    pulse.mode = :additive
    pulse.alpha -= 150
    pulse.scale_rate = 0.002
    pulse.fade_rate = -3 + rand(2)
    pulse.rotation_rate = rand(2)==0 ? 0.05 : -0.05
  end
    
  def update
    destroy if self.alpha == 0
  end
  
end

Game.new.show