sneak/Jumpy.Shared/JumpyGame.cs

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;

using System.Collections.Generic;

namespace Jumpy {
  public class JumpyGame : Game {
    GraphicsDeviceManager graphics;
    SpriteBatch spriteBatch;
    Texture2D playerTexture;
    SpriteFont font;
    KeyboardInput keyboardInput = new KeyboardInput();
    bool fullScreen = false;
    IDisplay display;

    public JumpyGame() {
      graphics = new GraphicsDeviceManager(this);
      IsMouseVisible = true;
      Content.RootDirectory = "Content";
    }

    // Performs initialization that's needed before starting to run.
    protected override void Initialize() {
      display = (IDisplay) Services.GetService(typeof(IDisplay));
      display.Initialize(Window, graphics);
      display.SetFullScreen(fullScreen);

      base.Initialize();
    }

    // Called once per game. Loads all game content.
    protected override void LoadContent() {
      spriteBatch = new SpriteBatch(GraphicsDevice);
      font = Content.Load<SpriteFont>("font");
      playerTexture = Content.Load<Texture2D>("player");
    }

    // Called once per game. Unloads all game content.
    protected override void UnloadContent() {
      // TODO: Unload any non ContentManager content here.
    }

    // Updates the game world.
    protected override void Update(GameTime gameTime) {
      keyboardInput.Update();
      List<Keys> keysDown = keyboardInput.NewKeysDown();

      if (keysDown.Contains(Keys.F12)) {
        fullScreen = !fullScreen;
        display.SetFullScreen(fullScreen);
      }

      if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed ||
          keysDown.Contains(Keys.Escape)) {
        Exit();
      }

      base.Update(gameTime);
    }

    // Called when the game should draw itself.
    protected override void Draw(GameTime gameTime) {
      GraphicsDevice.Clear(Color.CornflowerBlue);

      const int spriteSize = 144;
      int frameNum = gameTime.TotalGameTime.Milliseconds / 250;
      if (frameNum == 3) {
        frameNum = 1;
      }
      int sourceX = spriteSize * frameNum + spriteSize * 3;
      int sourceY = spriteSize * 0;
      Rectangle source = new Rectangle(sourceX, sourceY, spriteSize, spriteSize);
      Vector2 position = new Vector2(100, 100);
      Vector2 spriteCenter = new Vector2(spriteSize / 2, spriteSize / 2);
      spriteBatch.Begin();
      spriteBatch.Draw(playerTexture, position, source, Color.White, 0f, spriteCenter, Vector2.One, SpriteEffects.FlipHorizontally, 0f);
      spriteBatch.End();

      // spriteBatch.DrawString(font, "hello world", new Vector2(100, 100), Color.Black);

      base.Draw(gameTime);
    }
  }
}