root/lang/ruby/starframe/lib/starframe/scene.rb @ 27902

# = StarFrame::Scene -- シーン

require "starframe/eventable"
require "starframe/initializable"
require "starframe/updatable"
require "starframe/renderable"

module StarFrame
  # = Sceneクラス
  # シーンクラス。
  class Scene
    include Eventable
    include Initializable
    include Updatable
    include Renderable
    
    # StarRuby::Game.run内で呼ぶこと
    # StarRuby::Game.run外で呼びたい場合はScene.to_procを使うこと
    def initialize game, *args
      @game   = game
      @screen = game.screen
      @running = true
      
      init *args
    end
    
    def call
      catch :exit_scene do
        update
        
        @screen.clear
        call_render
        
        true
      end
    end
    
    def start
      catch :exit_scene do
        loop do
          if @game.window_closing?
            quit
            return nil
          end
          
          @game.wait
          @game.update_state
          return @next_scene unless call
          @game.update_screen
        end
      end
    end
    
    private
    def exit_scene
      quit
      @next_scene = nil
      throw :exit_scene, false
    end
    
    def next_scene next_scene
      quit
      @next_scene = next_scene
      throw :exit_scene, false
    end
  end
end