Encrypting Editor Notepad Replacement

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Messagebox_Class
{
	/// <summary> MessageBox similar simple partial replacement.
	/// This class is a single file generic drop into any application.
	/// This dialog will center on the parent window rather than the screen.
	/// This dialog will allow the message to be copied and pasted.
	/// This dialog will snap the cursor to the default button.
	/// It is important to note that the leftmost button is always the default.
	/// The rightmost button is always the cancel (ESC) button
	/// This dialog will not be wider than ~640 but it can be smaller
	/// This dialog will scroll for long messages
	/// The caption will always include the program name.
	/// </summary>
	public static class Messagebox
	{
		#region Public show functions
		/// <summary> Displays a message box with the specified text.
		/// </summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <returns>DialogResult</returns>
		public static DialogResult Show (string text)
		{
			return Messageboxform.Show (text, null, MessageBoxButtons.OK);
		}
		/// <summary> Displays a message box with the specified text and caption.
		/// </summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <returns>DialogResult</returns>
		public static DialogResult Show (string text, string caption)
		{
			return Messageboxform.Show (text, caption, MessageBoxButtons.OK);
		}
		/// <summary> Displays a message box with the specified text, caption, and buttons.
		/// </summary>
		/// <param name="text">The text to display in the message box.</param>
		/// <param name="caption">The text to display in the title bar of the message box.</param>
		/// <param name="buttons">One of the System.Windows.Forms.MessageBoxButtons values that 
		/// specifies which buttons to display in the message box.</param>
		/// <returns>DialogResult</returns>
		public static DialogResult Show (string text, string caption, MessageBoxButtons buttons)
		{
			return Messageboxform.Show (text, caption, buttons);
		}
		#endregion
		#region Internal form class
		/// <summary> This private subclass extracts form details from the Messagebox class 
		/// it also gives a cleaner choice from autoselect and a single file to include
		/// </summary>
		class Messageboxform:Form
		{
			#region Messageboxform.Designer.cs

			/// <summary>
			/// Required designer variable.
			/// </summary>
			private System.ComponentModel.IContainer components = null;

			/// <summary>
			/// Clean up any resources being used.
			/// </summary>
			/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
			protected override void Dispose (bool disposing)
			{
				if (disposing && (components != null))
				{
					components.Dispose ();
				}
				base.Dispose (disposing);
			}

			#region Windows Form Designer generated code

			/// <summary>
			/// Required method for Designer support - do not modify
			/// the contents of this method with the code editor.
			/// </summary>
			private void InitializeComponent ()
			{
				this.textMessage = new System.Windows.Forms.TextBox ();
				this.button1 = new System.Windows.Forms.Button ();
				this.button2 = new System.Windows.Forms.Button ();
				this.button3 = new System.Windows.Forms.Button ();
				this.SuspendLayout ();
				// 
				// textMessage
				// 
				this.textMessage.Anchor = ((System.Windows.Forms.AnchorStyles) ((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
				| System.Windows.Forms.AnchorStyles.Left)
				| System.Windows.Forms.AnchorStyles.Right)));
				this.textMessage.BackColor = System.Drawing.SystemColors.Control;
				this.textMessage.BorderStyle = System.Windows.Forms.BorderStyle.None;
				this.textMessage.Cursor = System.Windows.Forms.Cursors.Default;
				this.textMessage.Location = new System.Drawing.Point (12, 14);
				this.textMessage.Margin = new System.Windows.Forms.Padding (3, 3, 3, 3);
				this.textMessage.Multiline = true;
				this.textMessage.Name = "textMessage";
				this.textMessage.ReadOnly = true;
				this.textMessage.Size = new System.Drawing.Size (570, 18);
				this.textMessage.TabIndex = 3;
				this.textMessage.Text = "Message";
				// 
				// button1
				// 
				this.button1.Anchor = ((System.Windows.Forms.AnchorStyles) ((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
				this.button1.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
				this.button1.Location = new System.Drawing.Point (500, 35);
				this.button1.Name = "button1";
				this.button1.Size = new System.Drawing.Size (82, 28);
				this.button1.TabIndex = 2;
				this.button1.Text = "button1";
				this.button1.UseVisualStyleBackColor = true;
				this.button1.Click += new System.EventHandler (this.button1_Click);
				// 
				// button2
				// 
				this.button2.Anchor = ((System.Windows.Forms.AnchorStyles) ((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
				this.button2.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
				this.button2.Location = new System.Drawing.Point (412, 35);
				this.button2.Name = "button2";
				this.button2.Size = new System.Drawing.Size (82, 28);
				this.button2.TabIndex = 1;
				this.button2.Text = "button2";
				this.button2.UseVisualStyleBackColor = true;
				this.button2.Click += new System.EventHandler (this.button2_Click);
				this.button2.Visible = false;
				// 
				// button3
				// 
				this.button3.Anchor = ((System.Windows.Forms.AnchorStyles) ((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
				this.button3.AutoSizeMode = System.Windows.Forms.AutoSizeMode.GrowAndShrink;
				this.button3.Location = new System.Drawing.Point (324, 35);
				this.button3.Name = "button3";
				this.button3.Size = new System.Drawing.Size (82, 28);
				this.button3.TabIndex = 0;
				this.button3.Text = "button3";
				this.button3.UseVisualStyleBackColor = true;
				this.button3.Click += new System.EventHandler (this.button3_Click);
				this.button3.Visible = false;
				// 
				// Messagebox
				// 
				this.AutoScaleDimensions = new System.Drawing.SizeF (10F, 18F);
				this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
				this.CancelButton = this.button1;
				this.ClientSize = new System.Drawing.Size (594, 75);
				this.Controls.Add (this.button3);
				this.Controls.Add (this.button2);
				this.Controls.Add (this.button1);
				this.Controls.Add (this.textMessage);
				this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
				this.Margin = new System.Windows.Forms.Padding (5, 4, 5, 4);
				this.MaximizeBox = false;
				this.MinimizeBox = false;
				this.Name = "Messagebox";
				this.ShowIcon = false;
				this.ShowInTaskbar = false;
				this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
				this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
				this.Shown += new System.EventHandler (this.Messagebox_Shown);
				this.ResumeLayout (false);
				this.PerformLayout ();

			}

			#endregion

			public System.Windows.Forms.TextBox textMessage;
			public System.Windows.Forms.Button button1;
			public System.Windows.Forms.Button button2;
			public System.Windows.Forms.Button button3;

			#endregion Messageboxform.Designer.cs
			#region Messageboxform.cs
			/// <summary> Public internal show function
			/// </summary>
			/// <param name="text">string to display</param>
			/// <param name="caption">string to add to caption</param>
			/// <param name="buttons">desired buttons</param>
			/// <returns>DialogResult</returns>
			public static DialogResult Show (string text, string caption, MessageBoxButtons buttons)
			{
				Messageboxform form = new Messageboxform ();

				int button_minimum;

				switch (buttons)
				{
					default:
					case MessageBoxButtons.OK:
						form.button1.Text = "OK";
						form.button1.DialogResult = DialogResult.OK;
						form.button1.TabIndex = 0;
						form.defaultbutton = form.button1;
						form.AcceptButton = form.button1;
						button_minimum = form.button1.Right - form.button1.Left;
						break;
					case MessageBoxButtons.OKCancel:
						form.button1.Text = "Cancel";
						form.button1.DialogResult = DialogResult.Cancel;
						form.button2.Text = "OK";
						form.button2.DialogResult = DialogResult.OK;
						form.button2.TabIndex = 0;
						form.button2.Visible = true;
						form.defaultbutton = form.button2;
						form.AcceptButton = form.button2;
						button_minimum = form.button1.Right - form.button2.Left;
						break;
					case MessageBoxButtons.YesNo:
						form.button1.Text = "No";
						form.button1.DialogResult = DialogResult.No;
						form.button2.Text = "Yes";
						form.button2.DialogResult = DialogResult.Yes;
						form.button2.TabIndex = 0;
						form.button2.Visible = true;
						form.defaultbutton = form.button2;
						form.AcceptButton = form.button2;
						button_minimum = form.button1.Right - form.button2.Left;
						break;
					case MessageBoxButtons.YesNoCancel:
						form.button1.Text = "Cancel";
						form.button1.DialogResult = DialogResult.Cancel;
						form.button2.Text = "No";
						form.button2.DialogResult = DialogResult.No;
						form.button2.Visible = true;
						form.button3.Text = "Yes";
						form.button3.DialogResult = DialogResult.Yes;
						form.button3.TabIndex = 0;
						form.button3.Visible = true;
						form.defaultbutton = form.button3;
						form.AcceptButton = form.button3;
						button_minimum = form.button1.Right - form.button3.Left;
						break;
				}

				Graphics g = form.CreateGraphics ();
				SizeF size = g.MeasureString (text, form.textMessage.Font, form.textMessage.Width);
#if false

// test only
using System.Text;

				// the height is too big! but by how much?
				for (int i = 1; i < 100; ++i)
				{

					StringBuilder st = new StringBuilder ();
					for (int j = 0; j < i; ++j)
						st.AppendLine (String.Format ("Line {0}", j));
					size = g.MeasureString (st.ToString (), form.textMessage.Font, form.textMessage.Width);
					int t = (int) size.Height;
					t = t / form.textMessage.Font.Height;
				}
#endif
				int width = (int) size.Width + 10;	// fudge a little for unknown reason

				if (form.textMessage.Width > width)
				{
					width = form.textMessage.Width - width;
					if (form.textMessage.Width - width < button_minimum)
						width = form.textMessage.Width - button_minimum;
					form.Width -= width;
				}

				// desired height
				int height = form.Height + (int) size.Height - form.textMessage.Height;
				Rectangle r = Screen.GetWorkingArea (form);
				// is it taller than the screen
				if (r.Height < height)
				{
					form.textMessage.ScrollBars = System.Windows.Forms.ScrollBars.Both;
					height = r.Height - form.textMessage.Height;
				}
				form.Height = height;
				
				form.textMessage.Text = text;

				form.Text = Application.ProductName;
				if (null != caption)
					form.Text += " - " + caption;

				return form.ShowDialog ();
			}
			private Button defaultbutton = null;
			public Messageboxform ()
			{
				InitializeComponent ();
				this.Font = SystemFonts.MessageBoxFont;
			}
			/// <summary> Move the cursor to the center of the default button
			/// </summary>
			/// <param name="sender"></param>
			/// <param name="e"></param>
			private void Messagebox_Shown (object sender, EventArgs e)
			{
				if (null == defaultbutton)
					return;
				Point p = new Point (defaultbutton.Width / 2, defaultbutton.Height / 2);
				p = defaultbutton.PointToScreen (p);
				Cursor.Position = p;
			}
			private void button1_Click (object sender, EventArgs e)
			{
				this.Close ();
			}
			private void button2_Click (object sender, EventArgs e)
			{
				this.Close ();
			}
			private void button3_Click (object sender, EventArgs e)
			{
				this.Close ();
			}
			#endregion Messageboxform.cs
		}
	}
		#endregion
}