source: 2011/23/sijoseha/AdventureGame/AdventureGame/Button.cs @ 1758

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;


namespace AdventureGame
{
    public delegate void ButtonClickedHandler(object sender, EventArgs e);

    public class Button
    {
        public event ButtonClickedHandler Clicked;

        public Vector2 Position { get { return new Vector2(Boundaries.X, Boundaries.Y); } set { } }
        public Rectangle Boundaries { get; set; }
        public int Width { get { return Boundaries.Width; } private set { } }
        public int Height { get { return Boundaries.Height; } private set { } }
        private Texture2D Image { get; set; }
        private Texture2D SelectedImage { get; set; }
        public Color BackgroundColor { get; set; }
        public Color BorderColor { get; set; }
        public string ButtonText { get; set; }
        public bool Selectable { get; set; }
        public bool Selected { get; set; }

        public Button(Rectangle boundaries, Texture2D texture, Color borderColor, bool selectable, GraphicsDevice device)
        {
            this.Boundaries = boundaries;
            this.BorderColor = borderColor;
            this.Image = CreateTexture(borderColor, texture, device);
            this.SelectedImage = CreateTexture(Color.White, texture, device);
        }

        public Button(Rectangle boundaries, string text, Color bgColor, Color borderColor, GraphicsDevice device, ButtonClickedHandler clickAction)
        {
            this.Boundaries = boundaries;
            this.ButtonText = text;
            this.BackgroundColor = bgColor;
            this.BorderColor = borderColor;
            this.Image = CreateTexture(bgColor, borderColor, device);
            
        }

        private Texture2D CreateTexture(Color bordercolor, Texture2D baseTexture, GraphicsDevice device)
        {
            Texture2D texture = new Texture2D(device, this.Width, this.Height);
            Color[,] tex = new Color[this.Width, this.Height];
            Color[] baseColors = new Color[this.Width*this.Height];
            baseTexture.GetData<Color>(baseColors);
            for (int x = 0; x < this.Width; x++)
            {
                for (int y = 0; y < this.Height; y++)
                {
                    if (x == 0 || y == 0 || x == this.Width-1 || y == this.Height-1)
                        tex[x, y] = bordercolor;
                    else
                        tex[x, y] = baseColors[x + y * this.Width];
                }
            }
            Color[] tex1D = new Color[this.Width * this.Height];
            for (int x = 0; x < this.Width; x++)
                for (int y = 0; y < this.Height; y++)
                    tex1D[x + y * this.Width] = tex[x, y];
            texture.SetData<Color>(tex1D);
            return texture;
        }

        private Texture2D CreateTexture(Color bgcolor, Color bordercolor, GraphicsDevice device)
        {
            Color[,] tex = new Color[this.Width, this.Height];
            for (int x = 0; x < this.Width; x++)
            {
                for (int y = 0; y < this.Height; y++)
                {
                    if (x == 0 || y == 0 || x == this.Width-1 || y == this.Height-1)
                        tex[x, y] = bordercolor;
                    else
                        tex[x, y] = bgcolor;
                }
            }
            Color[] tex1D = new Color[this.Width * this.Height];
            for (int x = 0; x < this.Width; x++)
                for (int y = 0; y < this.Height; y++)
                    tex1D[x + y * this.Width] = tex[x, y];
            Texture2D texture = new Texture2D(device, this.Width, this.Height);
            texture.SetData<Color>(tex1D);
            return texture;
        }

        protected void OnClicked(EventArgs e)
        {
            if (Clicked != null)
                Clicked(this, e);
        }

        public void Pressed()
        {
            OnClicked(EventArgs.Empty);
        }

        public void Draw(SpriteBatch sb)
        {
            if(this.Selected)
                sb.Draw(this.SelectedImage, this.Boundaries, Color.White);
            else
                sb.Draw(this.Image, this.Boundaries, Color.White);
            if(this.ButtonText != null)
                sb.DrawString(AdventureGame.basicFont, this.ButtonText, this.Position, Color.Black);
        }
    }
}