FileSelect - Hassle Free Implementation of the File Menu

// ==================================================================
// 
//  FileSelectDemo - FileSelectDemo.cs
// 
//  Copyright 2009 Peter Hauptmann
//  This code is published under CodeProject Open License 
//    see http://www.codeproject.com/info/cpol10.aspx
//  Latest version and feedback at
//   http://www.codeproject.com/KB/menus/fileselect.aspx 
// 
// ------------------------------------------------------------------


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using PH.UI.FileSelect;
using System.Diagnostics;
using TestFileSelect.Properties;

namespace TestFileSelect
{
  public partial class FileSelectDemo : Form
  {
    public FileSelectDemo()
    {
      InitializeComponent();

      // load "recent files" list:
      // Settings.Default.Reload();
      fileSelect1.RecentFiles.AllFiles = Settings.Default.RecentFileList;
    }

    private void fileSelect1_NewOrOpenDocument(object sender, EventArgs e)
    {
      // this handles both the "create new" and "open existing" document
      // we put the code into a single handler, since it is very similar.

      FileSelectEventArgs fse = (FileSelectEventArgs)e;
      DocumentInfo docInfo = fse.DocumentInfo;

      // just a check, that my FileSelect implementation is correct (you don't usually need that):
      // in single file mode, there should be no current document when "new" is called.
      Debug.Assert(textBox1.Text.Length == 0); 

      // Create document instance
      TextDocument textDoc;
      if (fse.Command == EFSCommand.New)
        textDoc = TextDocument.New();
      else
        textDoc = TextDocument.Load(fse.Path);

      // if that is successful, initialize the document info with the document
      docInfo.InitDocument(textDoc);

      // update the user interface:
      textBox1.Text = textDoc.Data;
      textBox1.Tag = docInfo;
      textBox1.ReadOnly = false;
    }
    private void fileSelect1_CloseDocument(object sender, EventArgs e)
    {
      // this event fires to close a document.
      // we clear the TextBox, and mark it as "read only"
      textBox1.Text = String.Empty;
      textBox1.Tag = null;
      textBox1.ReadOnly = true;
    }
    private void fileSelect1_SaveDocument(object sender, EventArgs e)
    {
      // we update the document, and save to the path specified in the event args

      FileSelectEventArgs fse = (FileSelectEventArgs)e;
      DocumentInfo docInfo = fse.DocumentInfo;
      TextDocument doc = (TextDocument)docInfo.Document;

      Debug.Assert(docInfo == textBox1.Tag); // another sanity check - this should be given in a single document single view scenario

      // update the document with changes from the view, and save it
      doc.Data = textBox1.Text;
      doc.Save(fse.Path); // note: fse.Path may be different from docInfo.Path
      fse.SaveComplete = true; // indicate that save was successful
    }
    private void textBox1_TextChanged(object sender, EventArgs e)
    {
      // handle changes in the view
      // Note: Here, we only set the document dirty. 
      // Since we have a single view, the change will be published to the document 
      // class just before saving. 
      DocumentInfo docInfo = textBox1.Tag as DocumentInfo;
      if (docInfo != null)
        docInfo.IsDirty = true;
    }


    // basic EXIT handler
    private void exitToolStripMenuItem_Click(object sender, EventArgs e)
    {
      Close();
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
      if (!fileSelect1.HandleQuit(e.CloseReason))
      {
        e.Cancel = true;
        return;
      }

      // save settings
      Settings.Default.RecentFileList = fileSelect1.RecentFiles.AllFiles;
      Settings.Default.Save();
    }

    private void propertyGrid1_Click(object sender, EventArgs e)
    {

    }

  }
}