From 78adb7aa6ccd4bfe8924d08ac655b325f32d7562 Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Tue, 1 May 2012 22:30:05 +0000
Subject: Working version of the XNA keyboard.

---
 .../KeyboardDriver.cs                              | 200 +++++++++++++++++++++
 1 file changed, 200 insertions(+)
 create mode 100644 src/Noddybox.Emulation.Xna.Keyboard/KeyboardDriver.cs

(limited to 'src/Noddybox.Emulation.Xna.Keyboard/KeyboardDriver.cs')

diff --git a/src/Noddybox.Emulation.Xna.Keyboard/KeyboardDriver.cs b/src/Noddybox.Emulation.Xna.Keyboard/KeyboardDriver.cs
new file mode 100644
index 0000000..b0671b8
--- /dev/null
+++ b/src/Noddybox.Emulation.Xna.Keyboard/KeyboardDriver.cs
@@ -0,0 +1,200 @@
+// This file is part of the Noddybox.Emulation C# suite.
+//
+// Noddybox.Emulation is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Noddybox.Emulation is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Noddybox.Emulation.  If not, see <http://www.gnu.org/licenses/>.
+//
+// Copyright (c) 2012 Ian Cowburn
+//
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Noddybox.Emulation.Keyboard.Schema;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Input.Touch;
+
+namespace Noddybox.Emulation.Xna.Keyboard
+{
+    /// <summary>
+    /// Displays and drives the keyboard.
+    /// </summary>
+    /// <typeparam name="T">The enumerated type matching the symbols in the used keyboard definition.</typeparam>
+    public class KeyboardDriver<T> where T: struct,IConvertible
+    {
+        #region Event arguments
+
+        /// <summary>
+        /// Event data when a key is pressed or released.
+        /// </summary>
+        public class KeyPress : EventArgs
+        {
+            /// <summary>
+            /// The key that was pressed.
+            /// </summary>
+            public T Key {get;set;}
+
+            /// <summary>
+            /// True if the key was pressed.  False if released.
+            /// </summary>
+            public bool Pressed {get; set;}
+        }
+
+        #endregion
+
+        #region Private data
+
+        private class KeyState
+        {
+            public T Symbol {get;set;}
+            public bool IsPressed {get; set;}
+            public bool IsSticky {get; set;}
+        }
+
+        private Rectangle[] keymapPos;
+        private KeyState[] keymapState;
+        private int keymapSize;
+        private KeyboardDefinition keyboard;
+        private Texture2D image;
+        private Vector2 position;
+        private Texture2D overlay;
+
+        #endregion
+
+        #region Private members
+
+        private void RaiseKeyChange(KeyState state)
+        {
+            if (KeyEvent != null)
+            {
+                KeyEvent(this, new KeyPress() {Key = state.Symbol, Pressed = state.IsPressed});
+            }
+        }
+
+        #endregion
+
+        #region Public members
+
+        /// <summary>
+        /// Updates the keyboard.  Note that this will consume all the key press events.
+        /// </summary>
+        public void Update()
+        {
+            foreach (TouchLocation t in TouchPanel.GetState())
+            {
+                int x = (int)t.Position.X;
+                int y = (int)t.Position.Y;
+                int f = 0;
+                KeyState key = null;
+
+                for(f = 0; f < keymapSize && key == null; f++)
+                {
+                    if (keymapPos[f].Contains(x, y))
+                    {
+                        key = keymapState[f];
+                    }
+                }
+
+                if (key != null)
+                {
+                    if (t.State == TouchLocationState.Pressed)
+                    {
+                        if (key.IsSticky)
+                        {
+                            key.IsPressed = !key.IsPressed;
+                        }
+                        else
+                        {
+                            key.IsPressed = true;
+                        }
+
+                        RaiseKeyChange(key);
+                    }
+                    else if (t.State == TouchLocationState.Released)
+                    {
+                        if (!key.IsSticky)
+                        {
+                            key.IsPressed = false;
+                            RaiseKeyChange(key);
+                        }
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Draw the keyboard
+        /// </summary>
+        /// <param name="spriteBatch"></param>
+        public void Draw(SpriteBatch spriteBatch)
+        {
+            spriteBatch.Draw(image, position, Color.White);
+
+            for(int f = 0; f < keymapSize; f++)
+            {
+                if (keymapState[f].IsPressed)
+                {
+                    spriteBatch.Draw(overlay, keymapPos[f], new Color(200, 200, 0, 25));
+                }
+            }
+        }
+
+        #endregion
+
+        #region Events
+
+        public EventHandler<KeyPress> KeyEvent;
+
+        #endregion
+
+        #region Constructors
+
+        /// <summary>
+        /// Constructor.
+        /// </summary>
+        /// <param name="graphics">The graphics device to associate textures with.</param>
+        /// <param name="image">The image for the keyboard.</param>
+        /// <param name="position">Where to draw and offset the keyboard to.</param>
+        /// <param name="keyboard">The keyboard to drive this from.</param>
+        public KeyboardDriver(GraphicsDevice graphics, Texture2D image, Vector2 position, KeyboardDefinition keyboard)
+        {
+            this.keyboard = keyboard;
+            this.image = image;
+            this.position = position;
+
+            keymapSize = keyboard.Definitions.Count;
+            keymapPos = new Rectangle[keymapSize];
+            keymapState = new KeyState[keymapSize];
+
+            for(int f = 0; f < keymapSize; f++)
+            {
+                KeyboardKey k = keyboard.Definitions[f];
+
+                keymapPos[f] = new Rectangle(k.X, k.Y, k.Width, k.Height);
+
+                keymapState[f] = new KeyState()
+                {
+                    Symbol = (T)Enum.Parse(typeof(T), k.KeySymbol, false),
+                    IsPressed = false,
+                    IsSticky = k.Sticky
+                };
+            }
+
+            Color c = Color.White;
+            overlay = new Texture2D(graphics, 2, 2, false, SurfaceFormat.Color);
+            overlay.SetData<Color>(new Color[] {c, c, c, c});
+        }
+
+        #endregion
+    }
+}
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