/////////////////////////////////////////////////////////////////////////////
// TextEdit.cs - Demonstrates how to read, edit, and write files           //
//                                                                         //
// Languagae:   C#, Visual Studio, .Net 2003                               //
// Platfrom:    Dell Dimension 8300, Windows XP Pro, SP2                   //
// Author:      Jim Fawcett, CST 2-187, Syracuse Univ., Syracuse, NY 13224 //
//              jfawcett@twcny.rr.com, (315)-443-3948                      //
/////////////////////////////////////////////////////////////////////////////

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;

namespace TextEdit
{
  public class Form1 : System.Windows.Forms.Form
  {
    private System.Windows.Forms.TextBox textBox1;
    private System.Windows.Forms.MainMenu mainMenu1;
    private System.Windows.Forms.MenuItem menuItem1;
    private System.Windows.Forms.MenuItem menuItem2;
    private System.Windows.Forms.MenuItem menuItem3;
    private System.ComponentModel.Container components = null;

    private string currentFile;
    private System.Windows.Forms.MenuItem menuItem4;
    bool dirty = false;

    public Form1()
    {
      InitializeComponent();
    }

    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (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.textBox1 = new System.Windows.Forms.TextBox();
      this.mainMenu1 = new System.Windows.Forms.MainMenu();
      this.menuItem1 = new System.Windows.Forms.MenuItem();
      this.menuItem2 = new System.Windows.Forms.MenuItem();
      this.menuItem3 = new System.Windows.Forms.MenuItem();
      this.menuItem4 = new System.Windows.Forms.MenuItem();
      this.SuspendLayout();
      // 
      // textBox1
      // 
      this.textBox1.AcceptsReturn = true;
      this.textBox1.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.textBox1.Font = new System.Drawing.Font("Courier New", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
      this.textBox1.Location = new System.Drawing.Point(40, 40);
      this.textBox1.Multiline = true;
      this.textBox1.Name = "textBox1";
      this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
      this.textBox1.Size = new System.Drawing.Size(480, 400);
      this.textBox1.TabIndex = 0;
      this.textBox1.Text = "";
      this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
      // 
      // mainMenu1
      // 
      this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                              this.menuItem1});
      // 
      // menuItem1
      // 
      this.menuItem1.Index = 0;
      this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                              this.menuItem2,
                                                                              this.menuItem3,
                                                                              this.menuItem4});
      this.menuItem1.Text = "File";
      // 
      // menuItem2
      // 
      this.menuItem2.Index = 0;
      this.menuItem2.Text = "open";
      this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
      // 
      // menuItem3
      // 
      this.menuItem3.Index = 1;
      this.menuItem3.Text = "new";
      this.menuItem3.Click += new System.EventHandler(this.menuItem3_Click);
      // 
      // menuItem4
      // 
      this.menuItem4.Index = 2;
      this.menuItem4.Text = "save";
      this.menuItem4.Click += new System.EventHandler(this.menuItem4_Click);
      // 
      // Form1
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(560, 514);
      this.Controls.Add(this.textBox1);
      this.Menu = this.mainMenu1;
      this.Name = "Form1";
      this.Text = "Form1";
      this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
      this.Load += new System.EventHandler(this.Form1_Load);
      this.ResumeLayout(false);

    }
    #endregion

    [STAThread]
    static void Main() 
    {
      Application.Run(new Form1());
    }

    private void Form1_Load(object sender, System.EventArgs e)
    {
      this.Text = "Prototype Text Editor";
    }
    //----< file\open menu item >------------------------------------

    private void menuItem2_Click(object sender, System.EventArgs e)
    {
      FileDialog fd = new OpenFileDialog();
      fd.InitialDirectory = Directory.GetCurrentDirectory();
      if(fd.ShowDialog()==DialogResult.OK)
      {
        currentFile = fd.FileName;
        this.Text = currentFile;
        StreamReader sr = new StreamReader(currentFile);
        textBox1.Text = sr.ReadToEnd();
        dirty = false;
        sr.Close();
      }
      fd.Dispose();
    }
    //----< file\save menu item >------------------------------------

    private void menuItem4_Click(object sender, System.EventArgs e)
    {
      FileDialog fd = new SaveFileDialog();
      fd.FileName = currentFile;
      if(fd.ShowDialog()==DialogResult.OK)
      {
        StreamWriter sw = new StreamWriter(fd.FileName);
        sw.WriteLine(textBox1.Text);
        sw.Close();
        dirty = false;
      }
      fd.Dispose();
      textBox1.SelectionStart = 0;
      textBox1.SelectionLength = 0;
    }
    //----< file\new menu item >-------------------------------------

    private void menuItem3_Click(object sender, System.EventArgs e)
    {
      textBox1.Text = "";
      currentFile = "new.txt";
      this.Text = currentFile;
      dirty = false;
    }
    //----< set dirty flag >-----------------------------------------

    private void textBox1_TextChanged(object sender, System.EventArgs e)
    {
      dirty = true;
    }
    //----< save modified text on closing >--------------------------

    private void Form1_Closing(object sender, CancelEventArgs e)
    {
      if(dirty == true)
        menuItem4_Click(sender,e);
    }
  }
}