imrpoved UI system structure and added a basic text module for testing; Untested.

RhythmBullet/RhythmBullet.csproj

@@ -42,16 +42,19 @@
     <ApplicationManifest>app.manifest</ApplicationManifest>
   </PropertyGroup>
   <ItemGroup>
-    <Compile Include="Zer01HD\Game\MainScreen\MainPage.cs" />
+    <Compile Include="Zer01HD\UI\Modular\Module.cs" />
-    <Compile Include="Zer01HD\UI\Page\Page.cs" />
+    <Compile Include="Zer01HD\UI\Modular\ModuleGroup.cs" />
     <Compile Include="RhythmBulletGame.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="Zer01HD\UI\Page\PageManager.cs" />
+    <Compile Include="Zer01HD\UI\Book\Page.cs" />
-    <Compile Include="Zer01HD\UI\Screen\Screen.cs" />
+    <Compile Include="Zer01HD\UI\Book\Book.cs" />
+    <Compile Include="Zer01HD\UI\Modular\Text.cs" />
+    <Compile Include="Zer01HD\UI\Screen.cs" />
     <Compile Include="Zer01HD\Utilities\ContentSystem\ContentLoad.cs" />
     <Compile Include="Zer01HD\Utilities\ContentSystem\ContentSystem.cs" />
     <Compile Include="Zer01HD\Utilities\ContentSystem\IContentResolver.cs" />
+    <Compile Include="Zer01HD\Utilities\ParticleSystem\Particle.cs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="MonoGame.Framework">
@@ -112,7 +115,9 @@
     </None>
     <None Include="app.manifest" />
   </ItemGroup>
-  <ItemGroup />
+  <ItemGroup>
+    <Folder Include="Zer01HD\Game\MainScreen\" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <Import Project="$(MSBuildExtensionsPath)\MonoGame\v3.0\MonoGame.Content.Builder.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 

RhythmBullet/RhythmBulletGame.cs

@@ -1,7 +1,7 @@
 using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
-using RhythmBullet.Zer01HD.UI.Screen;
+using RhythmBullet.Zer01HD.UI;
 
 namespace RhythmBullet
 {

RhythmBullet/Zer01HD/Game/MainScreen/MainPage.cs

@@ -1,17 +0,0 @@
-using RhythmBullet.Zer01HD.UI.Page;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace RhythmBullet.Zer01HD.Game.MainScreen
-{
-    class MainPage : Page
-    {
-        public MainPage(int pageX, int pageY) : base(pageX, pageY)
-        {
-
-        }
-    }
-}

RhythmBullet/Zer01HD/UI/Book/Book.cs

@@ -0,0 +1,45 @@
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.UI.Book
+{
+    class Book
+    {
+        Viewport viewport;
+        Dictionary<string, Page> pages = new Dictionary<string, Page>();
+        public Book(Viewport viewport)
+        {
+            this.viewport = viewport;
+        }
+
+        public void AddPage(Page page)
+        {
+            pages.Add(page.Name, page);
+        }
+
+        public void RemovePage(Page page)
+        {
+            RemovePage(page.Name);
+        }
+
+        public void RemovePage(string name)
+        {
+            pages.Remove(name);
+        }
+
+        public void Resize(int width, int height)
+        {
+            viewport.Width = width;
+            viewport.Height = height;
+        }
+
+        public void DisplayPage(string name)
+        {
+            pages[name].DisplayWithViewport(viewport);
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Book/Page.cs

@@ -0,0 +1,36 @@
+using Microsoft.Xna.Framework.Graphics;
+using RhythmBullet.Zer01HD.UI.Modular;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.UI.Book
+{
+    class Page : ModuleGroup
+    {
+        private readonly int pageX, pageY;
+
+        public Page(int pageX, int pageY, int width, int height)
+        {
+            this.pageX = pageX;
+            this.pageY = pageY;
+            ApplySize(width, height);
+        }
+
+        public virtual void ApplySize(int width, int height)
+        {
+            X = pageX * width;
+            Y = pageY * height;
+            this.Width = width;
+            this.Height = height;
+        }
+
+        public void DisplayWithViewport(Viewport viewport)
+        {
+            viewport.X = X;
+            viewport.Y = Y;
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Modular/Module.cs

@@ -0,0 +1,38 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.UI.Modular
+{
+    public class Module
+    {
+        public Vector2 Position = new Vector2();
+        public float Width, Height;
+        public ModuleGroup Parent;
+        public string Name;
+        public Color Color;
+
+        public virtual void Update(GameTime gameTime)
+        {
+
+        }
+
+        public virtual void Draw(SpriteBatch batch)
+        {
+
+        }
+
+        public void RemoveFromParent()
+        {
+            if (Parent == null)
+            {
+                throw new InvalidOperationException("Parent is null.");
+            }
+            Parent.RemoveModule(this);
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Modular/ModuleGroup.cs

@@ -0,0 +1,85 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace RhythmBullet.Zer01HD.UI.Modular
+{
+    public class ModuleGroup : Module
+    {
+        List<Module> modules = new List<Module>();
+        Rectangle scissorBounds;
+        RasterizerState scissorRasterizer = new RasterizerState();
+        public ModuleGroup(bool crop = false)
+        {
+            if (crop)
+            {
+                scissorRasterizer.ScissorTestEnable = true;
+                scissorBounds = new Rectangle();
+            }
+        }
+
+        public override void Draw(SpriteBatch batch)
+        {
+            if (scissorBounds != null)
+            {
+                batch.End();
+                batch.Begin(SpriteSortMode.Deferred, null, null, null, scissorRasterizer);
+                scissorBounds.Width = (int) Width;
+                scissorBounds.Height = (int) Height;
+                scissorBounds.X = (int) Position.X;
+                scissorBounds.Y = (int) Position.Y;
+                Rectangle scissor = scissorBounds;
+                scissorBounds = batch.GraphicsDevice.ScissorRectangle;
+                batch.GraphicsDevice.ScissorRectangle = scissor;
+            }
+            foreach (Module module in modules)
+            {
+                float offsetX = module.Position.X;
+                float offsetY = module.Position.Y;
+                module.Position.X = Position.X + offsetX;
+                module.Position.Y = Position.Y + offsetY;
+                module.Draw(batch);
+                module.Position.X = offsetX;
+                module.Position.Y = offsetY;
+            }
+
+            if (scissorBounds != null)
+            {
+                batch.GraphicsDevice.ScissorRectangle = scissorBounds;
+                batch.End();
+                batch.Begin();
+            }
+        }
+
+        public override void Update(GameTime gameTime)
+        {
+            foreach (Module module in modules)
+            {
+                module.Update(gameTime);
+            }
+        }
+
+        public void AddModule(params Module[] addModules)
+        {
+            foreach (Module module in addModules)
+            {
+                if (modules.Contains(module))
+                {
+                    throw new InvalidOperationException(module.ToString() + " already exists in " + this.ToString());
+                }
+                module.Parent = this;
+                modules.Add(module);
+            }
+        }
+
+        public void RemoveModule(Module module)
+        {
+            module.Parent = null;
+            modules.Remove(module);
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Modular/Text.cs

@@ -0,0 +1,40 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.UI.Modular
+{
+    class Text : Module
+    {
+        private SpriteFont font;
+        private float scale;
+        public string DisplayedText
+        {
+            get
+            {
+                return DisplayedText;
+            }
+            set
+            {
+                Vector2 size = font.MeasureString(value);
+                Width = size.X;
+                scale = Height / size.Y;
+            }
+        }
+        public Text(string displayedText, SpriteFont font, int height)
+        {
+            this.font = font;
+            Height = height;
+        }
+
+        public override void Draw(SpriteBatch batch)
+        {
+            batch.DrawString(font, DisplayedText, Position, Color);
+            base.Draw(batch);
+        }
+    }
+}

RhythmBullet/Zer01HD/UI/Page/Page.cs

@@ -1,31 +0,0 @@
-using Microsoft.Xna.Framework;
-using Microsoft.Xna.Framework.Graphics;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace RhythmBullet.Zer01HD.UI.Page
-{
-    class Page
-    {
-        private readonly int pageX, pageY;
-        public readonly int xPos, yPos;
-        public Page(int pageX, int pageY)
-        {
-            this.pageX = pageX;
-            this.pageY = pageY;
-       }
-
-        public void Update(GameTime gameTime)
-        {
-            
-        }
-
-        public void Draw(SpriteBatch batch)
-        {
-
-        }
-    }
-}

RhythmBullet/Zer01HD/UI/Page/PageManager.cs

@@ -1,31 +0,0 @@
-using Microsoft.Xna.Framework;
-using Microsoft.Xna.Framework.Graphics;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace RhythmBullet.Zer01HD.UI.Page
-{
-    class PageManager
-    {
-        private readonly List<Page> pages = new List<Page>();
-
-        public void Act(GameTime gameTime)
-        {
-            foreach (Page page in pages)
-            {
-                page.Update(gameTime);
-            }
-        }
-
-        public void Draw(SpriteBatch spriteBatch)
-        {
-            foreach (Page page in pages)
-            {
-                page.Draw(spriteBatch);
-            }
-        }
-    }
-}

RhythmBullet/Zer01HD/UI/Screen.cs

@@ -6,31 +6,31 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace RhythmBullet.Zer01HD.UI.Screen
+namespace RhythmBullet.Zer01HD.UI
 {
-    class Screen
+    public class Screen
     {
-        public void Update(GameTime gameTime)
+        public virtual void Update(GameTime gameTime)
         {
             
         }
 
-        public void Draw(SpriteBatch spriteBatch)
+        public virtual void Draw(SpriteBatch spriteBatch)
         {
 
         }
 
-        public void Show()
+        public virtual void Show()
         {
 
         }
 
-        public void Hide()
+        public virtual void Hide()
         {
 
         }
 
-        public void resize()
+        public virtual void Resize()
         {
 
         }

RhythmBullet/Zer01HD/Utilities/ContentSystem/ContentSystem.cs

@@ -9,7 +9,7 @@ using System.Threading.Tasks;
 
 namespace RhythmBullet.Zer01HD.Utilities.ContentSystem
 {
-    class ContentSystem
+    public class ContentSystem
     {
         volatile bool queued;
         Thread thread;
@@ -46,7 +46,7 @@ namespace RhythmBullet.Zer01HD.Utilities.ContentSystem
             }
         }
 
-        T get<T>(string assetName)
+        public T Get<T>(string assetName)
         {
             lock(queue)
             {
@@ -54,7 +54,7 @@ namespace RhythmBullet.Zer01HD.Utilities.ContentSystem
             }
         }
 
-        void Queue(string assetName, Type type)
+        public void Queue(string assetName, Type type)
         {
             queued = true;
             lock (queue)

RhythmBullet/Zer01HD/Utilities/ParticleSystem/Particle.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace RhythmBullet.Zer01HD.Utilities.ParticleSystem
+{
+    class Particle
+    {
+    }
+}