GCat (main class)

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace CatTetris
{

    public class GCat : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;

        //Wall sprites
        public static Sprite wallLeft;
        public static Sprite wallRight;

        //Sprites for purple block
        Sprite purpleCat1;
        Sprite purpleCat2;
        Sprite purpleCat3;
        Sprite purpleCat4;

        //PurpleBlock
        Block purpleBlock;

        public static int frameWidth = 600;
        public static int frameHeight = 600;

        SpriteBatch spriteBatch;
        SpriteBatch purpleBatch;

        public GCat()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        /// <summary>
        /// Allows the game to perform any initialization it needs to before starting to run.
        /// This is where it can query for any required services and load any non-graphic
        /// related content.  Calling base.Initialize will enumerate through any components
        /// and initialize them as well.
        /// </summary>
        protected override void Initialize()
        {
            // TODO: Add your initialization logic here
            wallLeft = new Sprite();
            wallRight = new Sprite();

            purpleCat1 = new Sprite();
            purpleCat2 = new Sprite();
            purpleCat3 = new Sprite();
            purpleCat4 = new Sprite();

            purpleBlock = new Block();

            InitGraphicsMode(frameWidth, frameHeight,false);

            base.Initialize();
        }

        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);
            purpleBatch = new SpriteBatch(GraphicsDevice);

            wallLeft.LoadContent(this.Content, "WallLeft");
            wallLeft.Position = new Vector2(0,0);

            wallRight.LoadContent(this.Content, "WallRight");
            wallRight.Position = new Vector2(frameWidth - 150,0);

            purpleCat1.LoadContent(this.Content, "purpleCat1");
            purpleCat2.LoadContent(this.Content, "purpleCat2");
            purpleCat3.LoadContent(this.Content, "purpleCat3");
            purpleCat4.LoadContent(this.Content, "purpleCat4");

            //load up the sprites and positions for the purple block
            purpleBlock.LoadSprites(purpleCat1, purpleCat2, purpleCat3, purpleCat4,
               new Vector2(250, 50), new Vector2(250, 0), new Vector2(200, 50), new Vector2(300, 50));
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// all content.
        /// </summary>
        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

        /// <summary>
        /// Allows the game to run logic such as updating the world,
        /// checking for collisions, gathering input, and playing audio.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            purpleBlock.updateSprites(gameTime);

            base.Update(gameTime);
        }

        /// <summary>
        /// This is called when the game should draw itself.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.White);

            //This is the sprite batch for the walls
            spriteBatch.Begin();

            wallLeft.Draw(this.spriteBatch);
            wallRight.Draw(this.spriteBatch);

            spriteBatch.End();

            //Individual sprite batch for each block
            Matrix purpleMatrix = purpleBlock.rotationMatrix;

            purpleBatch.Begin(SpriteSortMode.BackToFront, null, null, null, null, null, purpleMatrix);

            purpleBlock.Draw(purpleBatch);

            purpleBatch.End();

            base.Draw(gameTime);
        }

        private void InitGraphicsMode(int width, int height, bool fullScreen)
        {
            if (!fullScreen)
            {
                if ((width <= GraphicsAdapter.DefaultAdapter.CurrentDisplayMode.Width) &&
                    (height <= GraphicsAdapter.DefaultAdapter.CurrentDisplayMode.Height))
                {
                    graphics.PreferredBackBufferWidth = width;
                    graphics.PreferredBackBufferHeight = height;
                    graphics.IsFullScreen = fullScreen;
                    graphics.ApplyChanges();
                }
            }
            else
            {
                foreach (DisplayMode dm in GraphicsAdapter.DefaultAdapter.SupportedDisplayModes)
                {
                    //Check the width and height of each of the GPU's display modes against the passed values
                    if ((dm.Width == width) && (dm.Height == height))
                    {
                        //the mode is supported so set the appropriate buffer formats and apply changes
                        graphics.PreferredBackBufferWidth = width;
                        graphics.PreferredBackBufferHeight = height;
                        graphics.IsFullScreen = fullScreen;
                        graphics.ApplyChanges();
                    }
                }

            }
        }// end InitGraphicsMode()
    }
}