#!/usr/bin/env ruby

require 'sfml/all'
require 'opengl'

class Example
  include SFML

  TITLE = "Josh's Ruby SFML/OpenGL Example"

  def initialize
    @fullscreen = false
    @window = Window.new
    create_window
  end

  def create_window
    if @fullscreen
      @window.create(VideoMode.get_desktop_mode, TITLE, Style::Fullscreen)
    else
      @window.create([1200, 900], TITLE)
    end

    glClearColor(1, 0.5, 0, 0)
  end

  def run
    while @window.open?
      @window.each_event do |event|
        case event.type
        when Event::Closed
          @window.close
        when Event::KeyPressed
          case event.key.code
          when Keyboard::Escape
            @window.close
          when Keyboard::F
            @fullscreen = !@fullscreen
            create_window
          end
        when Event::Resized # Resize event : adjust viewport
          glViewport(0, 0, event.size.width, event.size.height)
        end
      end

      glClear(GL_COLOR_BUFFER_BIT)

      @window.display
    end
  end
end

Example.new.run