refactor and better screen mechanism (probably)

RhythmBullet/Zer01HD/Screens/MainMenu/MainPage.cs

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+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using RhythmBullet.Zer01HD.UI.Book;
+using RhythmBullet.Zer01HD.Utilities.ContentSystem;
+using RhythmBullet.Zer01HD.Utilities.UI.Modular.Modules;
+
+namespace RhythmBullet.Zer01HD.Screens.MainMenu
+{
+    internal class MainPage : Page
+    {
+        Image title;
+        internal MainPage(ContentManagerController assets) : base(0, 0)
+        {
+            title = new Image(assets.Get<Texture2D>("title"));
+            AddModule(title);
+        }
+
+        public override void ApplySize(int width, int height)
+        {
+            title.Scale = (width - 40) / title.Texture.Width;
+            title.Bounds.X = (int)((width - title.Bounds.Width) / 2f);
+            title.Bounds.Y = (int)((height - title.Bounds.Height) / 2f);
+            base.ApplySize(width, height);
+        }
+
+        public override void Draw(SpriteBatch batch)
+        {
+            base.Draw(batch);
+        }
+    }
+}

RhythmBullet/Zer01HD/Screens/MainMenu/MainScreen.cs

@@ -0,0 +1,59 @@
+
+
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using RhythmBullet.Zer01HD.Screens.Transitions;
+using RhythmBullet.Zer01HD.UI.Book;
+using RhythmBullet.Zer01HD.Utilities.Camera;
+using RhythmBullet.Zer01HD.Utilities.ContentSystem;
+using RhythmBullet.Zer01HD.Utilities.ScreenSystem;
+using System;
+
+namespace RhythmBullet.Zer01HD.Screens.MainMenu
+{
+    class MainScreen : Screen
+    {
+        ContentManagerController assets;
+        FadeAwayTransition fat;
+        Texture2D background;
+        Book book;
+        MainPage mainPage;
+
+        public MainScreen(ContentManagerController assets) : base(true)
+        {
+            this.assets = assets;
+            background = assets.Get<Texture2D>("backgrounds/mainBG");
+            fat = new FadeAwayTransition(1.5f);
+            book = new Book();
+            mainPage = new MainPage(assets);
+            book.AddPages(mainPage);
+        }
+
+        public override void Initiate(GraphicsDevice graphicsDevice, Rectangle screenSize, Camera2D camera)
+        {
+            book.Initiate(camera, screenSize);
+            base.Initiate(graphicsDevice, screenSize, camera);
+        }
+
+        public override void Show()
+        {
+            Mouse.SetCursor(MouseCursor.FromTexture2D(assets.Get<Texture2D>("cursor"), 256, 256));
+            Transitions.Add(fat);
+            base.Show();
+        }
+
+        public override void Draw(SpriteBatch spriteBatch)
+        {
+            spriteBatch.Draw(background, ScreenSize, Color.White);
+            book.Draw(spriteBatch);
+            base.Draw(spriteBatch);
+        }
+
+        public override void Update(GameTime gameTime)
+        {
+            book.Update(gameTime);
+            base.Update(gameTime);
+        }
+    }
+}