Experimental selection code

DepthsBelow/DepthsBelow/Camera.cs

@@ -7,7 +7,7 @@ using Microsoft.Xna.Framework.Input;
 
 namespace DepthsBelow
 {
-	class Camera
+	public class Camera
 	{
 		public float Zoom;
 		public Matrix Transform;

DepthsBelow/DepthsBelow/Core.cs

@@ -19,7 +19,8 @@ namespace DepthsBelow
 		GraphicsDeviceManager graphics;
 		SpriteBatch spriteBatch;
 
-		Camera camera;
+		public Camera camera;
+		MouseControl mouse;
 		Soldier soldier;
 
 		public Core()
@@ -59,6 +60,9 @@ namespace DepthsBelow
 			// TODO: use this.Content to load your game content here
 			Soldier.LoadContent(this);
 			soldier = new Soldier(this);
+
+			mouse = new MouseControl(this);
+			mouse.LoadContent();
 		}
 
 		/// <summary>
@@ -82,6 +86,7 @@ namespace DepthsBelow
 				this.Exit();
 
 			camera.Update(gameTime);
+			mouse.Update(gameTime);
 
 			// TODO: Add your update logic here
 			soldier.Update(gameTime);
@@ -104,6 +109,8 @@ namespace DepthsBelow
 			if (rc != null)
 				rc.Draw(spriteBatch);
 
+			mouse.Draw(spriteBatch);
+
 			spriteBatch.End();
 
 			base.Draw(gameTime);

DepthsBelow/DepthsBelow/DepthsBelow.csproj

@@ -125,6 +125,7 @@
     <Compile Include="Component\GridTransform.cs" />
     <Compile Include="Core.cs" />
     <Compile Include="Entity.cs" />
+    <Compile Include="MouseControl.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Component\SpriteRenderer.cs" />

DepthsBelow/DepthsBelow/MouseControl.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Content;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using Microsoft.Xna.Framework.Media;
+
+namespace DepthsBelow
+{
+	class MouseControl
+	{
+		Core core;
+		MouseState lastMouseState;
+		Rectangle selectionRectangle;
+		Texture2D selectionTexture;
+
+		public MouseControl(Core core)
+		{
+			this.core = core;
+
+			selectionRectangle = Rectangle.Empty;
+		}
+
+		public void LoadContent()
+		{
+			selectionTexture = new Texture2D(core.GraphicsDevice, 1, 1);
+			selectionTexture.SetData(new Color[] { Color.White });
+		}
+
+		public void Update(GameTime gameTime)
+		{
+			MouseState ms = Mouse.GetState();
+
+			if (ms.LeftButton == ButtonState.Pressed)
+			{
+				if (selectionRectangle == Rectangle.Empty)
+				{
+					selectionRectangle = new Rectangle(ms.X + (int)core.camera.Position.X, ms.Y + (int)core.camera.Position.Y, 0, 0);
+				}
+				else
+				{
+					selectionRectangle.Width = ms.X - selectionRectangle.X + (int)core.camera.Position.X;
+					selectionRectangle.Height = ms.Y - selectionRectangle.Y + (int)core.camera.Position.Y;
+				}
+			}
+
+			if (ms.LeftButton == ButtonState.Released && selectionRectangle != Rectangle.Empty)
+			{
+				selectionRectangle = Rectangle.Empty;
+			}
+
+			lastMouseState = ms;
+		}
+
+		public void Draw(SpriteBatch spriteBatch)
+		{
+			spriteBatch.Draw(selectionTexture, selectionRectangle, Color.Red * 0.5f);
+		}
+	}
+}