Lösningsförslag till uppgift 8.23

Filer i detta program

• parrot.png

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

namespace Uppgift_8._22
{
    /// <summary>
    /// This is the main type for your game.
    /// </summary>
    public class Game1 : Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;

        Texture2D parrotBild;
        Rectangle parrotRect;

        MouseState mus = Mouse.GetState();
        MouseState gammalMus = Mouse.GetState();

        bool överVänsterStilla = true;

        public Game1()
        {
            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()
        {
            IsMouseVisible = true;

            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);

            parrotBild = Content.Load<Texture2D>("parrot");
            parrotRect = new Rectangle(100, 100, parrotBild.Width, parrotBild.Height);
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// game-specific 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)
        {
            gammalMus = mus;
            mus = Mouse.GetState();

            if (överVänsterStilla)
            {
                parrotRect.Width = mus.X - parrotRect.X;
                parrotRect.Height = mus.Y - parrotRect.Y;
            }
            else
            {
                int nedreHögraX = parrotRect.X + parrotRect.Width;
                int nedreHögraY = parrotRect.Y + parrotRect.Height;

                parrotRect.X = mus.X;
                parrotRect.Y = mus.Y;

                parrotRect.Width = nedreHögraX - mus.X;
                parrotRect.Height = nedreHögraY - mus.Y;
            }

            if (mus.LeftButton == ButtonState.Pressed && gammalMus.LeftButton == ButtonState.Released)
            {
                överVänsterStilla = !överVänsterStilla;
            }

            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.CornflowerBlue);

            spriteBatch.Begin();
            spriteBatch.Draw(parrotBild, parrotRect, Color.White);
            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}