Dual Pane File Manager

using System;
using System.Collections;
using System.IO;
using System.Text;
using System.Windows.Forms;

namespace JGTreeView
{
	public class JTreeViewBase : System.Windows.Forms.TreeView
	{
		public delegate void MessageSenderEventHandler(object sender, string Message, bool Error);
		public event MessageSenderEventHandler OnMessageSender;

		public void RaiseMessageSenderEventHandler(object sender, string Message, bool Error)
		{
			if (OnMessageSender != null)
			{
				OnMessageSender(sender, Message, Error);
			}
		}

		public JTreeViewBase()
			: base()
		{
			this.HideSelection = false;
		}

		private TreeNode DoGetNodeByName(string nodeName, bool searchAllChildren)
		{
			TreeNode[] tnFound = this.Nodes.Find(nodeName, searchAllChildren);

			if (tnFound.Length > 0)
				return tnFound[0];
			return null;
		}

		private TreeNode DoGetNodeByName(TreeNode tnStart, string nodeName, bool searchAllChildren)
		{
			if (tnStart != null)
			{
				tnStart.Collapse();
				tnStart.Expand();

				TreeNode[] tnFound = tnStart.Nodes.Find(nodeName, searchAllChildren);

				if (tnFound.Length > 0)
					return tnFound[0];
			}
			return null;
		}

		private TreeNode DoSetNodeToName(string nodeName, bool isFilePath, bool searchAllChildren)
		{
			if (nodeName == "")
				return null;

			this.BeginUpdate();

			TreeNode tnFind = null;

			string searchPath = "";

			//	Let's see if it already exists
			TreeNode[] tnArray = this.Nodes.Find(nodeName, true);
			if (tnArray.Length > 0)
				tnFind = tnArray[0];

			if (tnFind != null)
			{
				this.SelectedNode = tnFind;
				tnFind.Collapse();
				tnFind.Expand();
			}
			else
			{
				string[] nameArray = nodeName.Split(Path.DirectorySeparatorChar);

				foreach (string current in nameArray)
				{
					if (current != "")
					{
						searchPath = Path.Combine(searchPath, current);
						if (isFilePath && searchPath.Length == 2)
							searchPath += Path.DirectorySeparatorChar.ToString();
						tnFind = (TreeNode)GetNodeByName(searchPath, true);
						if (tnFind != null)
						{
							this.SelectedNode = tnFind;
							tnFind.Collapse();
							tnFind.Expand();
						}
					}
				}
			}

			this.EndUpdate();

			return tnFind;
		}

		private TreeNode DoSetNodeToName(TreeNode tnStart, string nodeName, bool isFilePath, bool searchAllChildren)
		{
			if (nodeName == "")
				return null;

			this.BeginUpdate();

			TreeNode tnFind = null;
			string searchPath = "";

			//	Let's see if it already exists
			TreeNode[] tnArray = this.Nodes.Find(nodeName, true);
			if (tnArray.Length > 0)
				tnFind = tnArray[0];

			if (tnFind != null)
			{
				this.SelectedNode = tnFind;
				tnFind.Collapse();
				tnFind.Expand();
			}
			else
			{
				string[] nameArray = nodeName.Split(Path.DirectorySeparatorChar);

				foreach (string current in nameArray)
				{
					if (current != "")
					{
						searchPath = Path.Combine(searchPath, current);
						if (isFilePath && searchPath.Length == 2)
							searchPath += Path.DirectorySeparatorChar.ToString();
						tnFind = (TreeNode)GetNodeByName(tnStart, searchPath, searchAllChildren);
						if (tnFind != null)
						{
							this.SelectedNode = tnFind;
							tnFind.Collapse();
							tnFind.Expand();
						}
					}
				}
			}

			this.EndUpdate();

			return tnFind;
		}

		
		/// <summary>
		/// Searches the complete TreeView for a TreeNode with the Name 'name'
		/// </summary>
		/// <param name="name">The Name of the TreeNode to search for</param>
		/// <param name="searchAllChildren">Flag to indicate if child nodes should be searched</param>
		/// <returns>The requested node or null if not found</returns>
		public TreeNode GetNodeByName(string name, bool searchAllChildren)
		{
			return DoGetNodeByName(name, searchAllChildren);
		}

		/// <summary>
		/// Searches the TreeNode for a child TreeNode with the Name 'name'
		/// </summary>
		/// <param name="tnStart">Starting TreeNode for the search</param>
		/// <param name="name">The Name of the TreeNode to search for</param>
		/// <param name="searchAllChildren">Flag to indicate if child nodes should be searched</param>
		/// <returns>The requested node or null if not found</returns>
		public TreeNode GetNodeByName(TreeNode tnStart, string name, bool searchAllChildren)
		{
			return DoGetNodeByName(tnStart, name, searchAllChildren);
		}

		/// <summary>
		/// Searches for the TreeNode with the Name 'name' and selects it if found
		/// </summary>
		/// <param name="name">The Name of the TreeNode to search for</param>
		/// <param name="isFilePath">Flag to indicate if it is a file path so that drive paths can be adjusted</param>
		/// <param name="searchAllChildren">Flag to indicate if child nodes should be searched</param>
		/// <returns>The requested node or null if not found</returns>
		public TreeNode SetNodeToName(string name, bool isFilePath, bool searchAllChildren)
		{
			return DoSetNodeToName(name, isFilePath, searchAllChildren);
		}

		/// <summary>
		/// Searches for the TreeNode with the Name 'name' and selects it if found
		/// </summary>
		/// <param name="tnStart">Starting TreeNode for the search</param>
		/// <param name="name">The Name of the TreeNode to search for</param>
		/// <param name="isFilePath">Flag to indicate if it is a file path so that drive paths can be adjusted</param>
		/// <param name="searchAllChildren">Flag to indicate if child nodes should be searched</param>
		/// <returns>The requested node or null if not found</returns>
		public TreeNode SetNodeToName(TreeNode tnStart, string name, bool isFilePath, bool searchAllChildren)
		{
			return DoSetNodeToName(tnStart, name, isFilePath, searchAllChildren);
		}

	}
}