From cad444e05df1a4388fbc0e19e7ad5ed64038b159 Mon Sep 17 00:00:00 2001
From: 0xdeadbeer <64986162+0xdeadbeer@users.noreply.github.com>
Date: Wed, 6 Dec 2023 22:15:20 +0100
Subject: [PATCH] 06 GUI: refactor button code and add basic scenes

---
 06-monogame/GUI/Content/Content.mgcb          |  12 ++
 .../GUI/Content/button-default-texture.png    | Bin 0 -> 545 bytes
 06-monogame/GUI/Game1.cs                      |  36 +++--
 06-monogame/GUI/UI/Button.cs                  | 136 ++++++++++++++++++
 06-monogame/GUI/UI/Drawable.cs                |  40 ++++++
 06-monogame/GUI/UI/Scene.cs                   |  80 +++++++++++
 06-monogame/GUI/UIElements/Button.cs          |  81 -----------
 7 files changed, 296 insertions(+), 89 deletions(-)
 create mode 100644 06-monogame/GUI/Content/button-default-texture.png
 create mode 100644 06-monogame/GUI/UI/Button.cs
 create mode 100644 06-monogame/GUI/UI/Drawable.cs
 create mode 100644 06-monogame/GUI/UI/Scene.cs
 delete mode 100644 06-monogame/GUI/UIElements/Button.cs

diff --git a/06-monogame/GUI/Content/Content.mgcb b/06-monogame/GUI/Content/Content.mgcb
index ddc4c36..8a4a692 100644
--- a/06-monogame/GUI/Content/Content.mgcb
+++ b/06-monogame/GUI/Content/Content.mgcb
@@ -13,3 +13,15 @@
 
 #---------------------------------- Content ---------------------------------#
 
+#begin button-default-texture.png
+/importer:TextureImporter
+/processor:TextureProcessor
+/processorParam:ColorKeyColor=255,0,255,255
+/processorParam:ColorKeyEnabled=True
+/processorParam:GenerateMipmaps=False
+/processorParam:PremultiplyAlpha=True
+/processorParam:ResizeToPowerOfTwo=False
+/processorParam:MakeSquare=False
+/processorParam:TextureFormat=Color
+/build:button-default-texture.png
+
diff --git a/06-monogame/GUI/Content/button-default-texture.png b/06-monogame/GUI/Content/button-default-texture.png
new file mode 100644
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diff --git a/06-monogame/GUI/Game1.cs b/06-monogame/GUI/Game1.cs
index 00581e0..6129ad4 100644
--- a/06-monogame/GUI/Game1.cs
+++ b/06-monogame/GUI/Game1.cs
@@ -1,4 +1,6 @@
-using Microsoft.Xna.Framework;
+using System;
+using System.Linq;
+using Microsoft.Xna.Framework;
 using Microsoft.Xna.Framework.Graphics;
 using Microsoft.Xna.Framework.Input;
 using GUI.UIElements;
@@ -9,7 +11,7 @@ public class Game1 : Game
 {
     private GraphicsDeviceManager _graphics;
     private SpriteBatch _spriteBatch;
-    private Button mainButton;
+    private Scene mainScene; 
 
     public Game1()
     {
@@ -20,14 +22,34 @@ public class Game1 : Game
 
     protected override void Initialize()
     {
-        mainButton = new Button(new Vector2(10.0f, 10.0f), new Vector2(80.0f, 40.0f), null, _graphics); 
+        _spriteBatch = new SpriteBatch(GraphicsDevice);
+
+        Scene.graphics = _graphics;
+        Scene.spriteBatch = _spriteBatch;
+        Scene.content = Content;
+        
+        mainScene = new Scene();
+        DrawableData drawableData = new DrawableData(null);
+        drawableData.scale = new Vector2(80.0f, 40.0f);
+
+        void buttonOnClick(Button obj)
+        {
+            Console.WriteLine("ACTION CALLED SUCCESSFULLY!");
+        }
+
+        ButtonData buttonData = new ButtonData(buttonOnClick);
+        buttonData.bgColor = Color.Red;
+        buttonData.fgColor = Color.White;
+
+        Button  mainButton = new Button(drawableData, buttonData);
+        
+        mainScene.drawables.Add(mainButton);
         
         base.Initialize();
     }
 
     protected override void LoadContent()
     {
-        _spriteBatch = new SpriteBatch(GraphicsDevice);
     }
 
     protected override void Update(GameTime gameTime)
@@ -35,7 +57,7 @@ public class Game1 : Game
         if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
             Exit();
         
-        mainButton.Update(gameTime);
+        mainScene.Update(gameTime);
 
         base.Update(gameTime);
     }
@@ -44,9 +66,7 @@ public class Game1 : Game
     {
         GraphicsDevice.Clear(Color.Black);
 
-        _spriteBatch.Begin();
-        mainButton.Draw(_spriteBatch, gameTime);
-        _spriteBatch.End();
+        mainScene.Draw(gameTime);
 
         base.Draw(gameTime);
     }
diff --git a/06-monogame/GUI/UI/Button.cs b/06-monogame/GUI/UI/Button.cs
new file mode 100644
index 0000000..b98e250
--- /dev/null
+++ b/06-monogame/GUI/UI/Button.cs
@@ -0,0 +1,136 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using Vector2 = Microsoft.Xna.Framework.Vector2;
+
+namespace GUI.UIElements;
+
+public class ButtonData
+{
+    public Color bgColor;
+    public Color fgColor;
+
+    public Color hoverBgColor;
+    public Color hoverFgColor;
+
+    public Color pressedBgColor;
+    public Color pressedFgColor;
+    
+    public bool isPressed = false;
+    public bool isReleased = false;
+    public bool isHovered = false;
+    public bool isNone = false;
+
+    public Action<Button>? onClick;
+
+    public ButtonData(Action<Button>? onClick)
+    {
+        this.onClick = onClick;
+    }
+}
+
+public class Button : Drawable
+{
+    private DrawableData _drawableData;
+    public ButtonData _buttonData; 
+    
+    public Button(DrawableData data, ButtonData buttonData)
+    {
+        _drawableData = data;
+        _buttonData = buttonData;
+    }
+
+    public override void Initialize(GameTime gameTime)
+    {
+        
+    }
+
+    void onPressed()
+    {
+        if (_buttonData.isPressed)
+            return;
+
+        Console.WriteLine("I'm being pressed!");
+        _buttonData.bgColor = Color.Red;
+
+        _buttonData.onClick(this);
+        
+        _buttonData.isReleased = false;
+        _buttonData.isPressed = true;
+    }
+
+    void onReleased()
+    {
+        if (!_buttonData.isPressed)
+            return;
+
+        _buttonData.bgColor = Color.Yellow; 
+        
+        _buttonData.isPressed = false;
+        _buttonData.isReleased = true;
+    }
+
+    void onHovered()
+    {
+        if (_buttonData.isHovered)
+            return;
+        
+        Console.WriteLine("I'm being hovered!");
+        _buttonData.bgColor = Color.Yellow;
+
+        _buttonData.isHovered = true;
+    }
+
+    void onNone()
+    {
+        _buttonData.bgColor = Color.Red;
+        
+        _buttonData.isPressed = false;
+        _buttonData.isReleased = false;
+        _buttonData.isHovered = false;
+    }
+
+    public override void Update(GameTime gameTime)
+    {
+        var mstate = Mouse.GetState();
+        Vector2 mousePosition = mstate.Position.ToVector2();
+
+        bool outsideHorizontalBoundary = (mousePosition.X < _drawableData.position.X) || (mousePosition.X > (_drawableData.position.X + _drawableData.scale.X));
+        bool outsideVerticalBoundary = (mousePosition.Y < _drawableData.position.Y) || (mousePosition.Y > (_drawableData.position.Y + _drawableData.scale.Y));
+
+        if (outsideHorizontalBoundary || outsideVerticalBoundary)
+        {
+            onNone();
+            return;
+        }
+
+        if (mstate.LeftButton == ButtonState.Pressed)
+        {
+            onPressed();
+            return;
+        }
+
+        if (mstate.LeftButton == ButtonState.Released)
+        {
+            onReleased();
+        }
+
+        onHovered();
+    } 
+    
+    public override void Draw(GameTime gameTime)
+    {
+        Scene.spriteBatch.Draw(
+            _drawableData.texture, 
+            _drawableData.position, 
+            null, 
+            _buttonData.bgColor, 
+            0.0f, 
+            Vector2.Zero,
+            _drawableData.scale, 
+            SpriteEffects.None, 
+            0f
+        );
+    }
+}
\ No newline at end of file
diff --git a/06-monogame/GUI/UI/Drawable.cs b/06-monogame/GUI/UI/Drawable.cs
new file mode 100644
index 0000000..5b637f4
--- /dev/null
+++ b/06-monogame/GUI/UI/Drawable.cs
@@ -0,0 +1,40 @@
+using System;
+using System.Data;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace GUI.UIElements;
+
+public class DrawableData
+{
+    public Texture2D texture;
+    public Vector2 position = Vector2.Zero;
+    public Vector2 scale = Vector2.One;
+    public float rotation = 0.0f;
+    
+    public DrawableData(Texture2D? texture)
+    {
+        if (texture is not null)
+        {
+            this.texture = texture;
+            return;
+        }
+
+        this.texture = Scene.content.Load<Texture2D>("button-default-texture");
+    }
+}
+
+public enum DrawableType
+{
+    Container,
+    Text,
+    Button,
+}
+
+public abstract class Drawable
+{
+    public DrawableType drawableType;
+    public abstract void Initialize(GameTime gameTime);
+    public abstract void Update(GameTime gameTime);
+    public abstract void Draw(GameTime gameTime);
+}
\ No newline at end of file
diff --git a/06-monogame/GUI/UI/Scene.cs b/06-monogame/GUI/UI/Scene.cs
new file mode 100644
index 0000000..652bb53
--- /dev/null
+++ b/06-monogame/GUI/UI/Scene.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Content;
+using Microsoft.Xna.Framework.Graphics;
+
+namespace GUI.UIElements;
+
+public class Scene
+{
+    private static ContentManager? _content;
+    public static ContentManager content
+    {
+        get { return _content;  }
+        set
+        {
+            if (_content is not null)
+                return;
+
+            _content = value;
+        }
+    }
+
+    private static GraphicsDeviceManager? _graphics;
+    public static GraphicsDeviceManager graphics
+    {
+        get { return _graphics;  }
+        set
+        {
+            if (_graphics is not null)
+                return;
+            
+            _graphics = value;
+        }
+    }
+    
+    private static SpriteBatch? _spriteBatch;
+
+    public static SpriteBatch spriteBatch
+    {
+        get { return _spriteBatch; }
+        set
+        {
+            if (_spriteBatch is not null)
+                return;
+
+            _spriteBatch = value;
+        }
+    }
+    
+    public List<Drawable> drawables;
+
+    public Scene()
+    {
+        drawables = new List<Drawable>();
+    }
+    
+    public void Initialize(GameTime gameTime)
+    {
+        
+    }
+
+    public void Update(GameTime gameTime)
+    {
+        foreach (Drawable drawable in drawables)
+        {
+            drawable.Update(gameTime);
+        }
+    }
+
+    public void Draw(GameTime gameTime)
+    {
+        spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend);
+        foreach (Drawable drawable in drawables)
+        {
+            drawable.Draw(gameTime);
+        }
+        spriteBatch.End();
+    }
+}
\ No newline at end of file
diff --git a/06-monogame/GUI/UIElements/Button.cs b/06-monogame/GUI/UIElements/Button.cs
deleted file mode 100644
index 3b92f7e..0000000
--- a/06-monogame/GUI/UIElements/Button.cs
+++ /dev/null
@@ -1,81 +0,0 @@
-using System;
-using Microsoft.Xna.Framework;
-using Microsoft.Xna.Framework.Graphics;
-using Microsoft.Xna.Framework.Input;
-using Vector2 = Microsoft.Xna.Framework.Vector2;
-
-namespace GUI.UIElements;
-
-public class Button
-{
-    private Texture2D texture; 
-    private Vector2 pos;
-    private Vector2 size;
-    private float rot;
-
-    private Color _bgColor;
-    public Color bgColor
-    {
-        get { return _bgColor; }
-        set
-        {
-            _bgColor = value; 
-            texture.SetData(new Color[] { _bgColor });
-        }
-    }
-
-    public Button(Vector2? pos, Vector2? size, float? rot, GraphicsDeviceManager graphics)
-    {
-        this.pos = pos ?? Vector2.Zero;
-        this.size = size ?? Vector2.One;
-        this.rot = rot ?? 0.0f;
-
-        texture = new Texture2D(graphics.GraphicsDevice, 1, 1);
-        bgColor = Color.Green;
-    }
-
-    public void OnClick(GameTime gameTime)
-    {
-        Console.WriteLine("You pressed a button!");
-        this.bgColor = Color.Yellow;
-    }
-
-    public void OnHover(GameTime gameTime)
-    {
-        Console.WriteLine("You're hovering over the button!");
-        this.bgColor = Color.Red;
-    }
-
-    public void NoEvent(GameTime gameTime)
-    {
-        this.bgColor = Color.Green;
-    }
-
-    public void Update(GameTime gameTime)
-    {
-        var mstate = Mouse.GetState();
-        Vector2 mousePosition = mstate.Position.ToVector2();
-
-        bool insideHorizontalBoundary = (mousePosition.X > pos.X) && (mousePosition.X < (pos.X + size.X));
-        bool insideVerticalBoundary = (mousePosition.Y > pos.Y) && (mousePosition.Y < (pos.Y + size.Y));
-
-        if (!insideHorizontalBoundary || !insideVerticalBoundary)
-        {
-            this.NoEvent(gameTime);
-            return;
-        }
-
-        if (Mouse.GetState().LeftButton == ButtonState.Pressed)
-        {
-            this.OnClick(gameTime);
-            return;
-        }
-        
-        this.OnHover(gameTime);
-    } 
-    
-    public void Draw(SpriteBatch spriteBatch, GameTime gameTime)
-    {
-        spriteBatch.Draw(texture, new Rectangle((int) pos.X, (int) pos.Y, (int) size.X, (int) size.Y), Color.White);
-    }
-}
\ No newline at end of file