Quick XML Reader

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using WeifenLuo.WinFormsUI.Docking;
using System.Threading;

namespace Trezorix.Qxr.Forms
{
	public partial class SearchResults : WeifenLuo.WinFormsUI.Docking.DockContent
	{
		public SearchResults()
		{
			InitializeComponent();
		}

		private Document m_currentSearchingDocument = null;

		private void SearchResults_Load(object sender, EventArgs e)
		{
			tbSearchText.Focus();
			tbSearchText.SelectAll();
			DockPanel.ActiveDocumentChanged += new EventHandler(DockPanel_ActiveDocumentChanged);
			FindSearchTarget();
		}

		private void DockPanel_ActiveDocumentChanged(object sender, EventArgs e)
		{
			FindSearchTarget();
		}

		private void RegisterEvents()
		{
			m_currentSearchingDocument.XmlReadStream.Search.SearchComplete += new Streamer.QuickXmlSearch.SearchCompleteEventHandler(Search_SearchComplete);
			m_currentSearchingDocument.XmlReadStream.Search.FoundItem += new Streamer.QuickXmlSearch.FoundItemEventHandler(Search_FoundItem);
		}
		private void UnregisterEvents()
		{
			m_currentSearchingDocument.XmlReadStream.Search.SearchComplete -= Search_SearchComplete;
			m_currentSearchingDocument.XmlReadStream.Search.FoundItem -= Search_FoundItem;
		}

		private void Search_FoundItem(object sender, Streamer.EventArguments.FoundItemEventArgs e)
		{
			AddFoundItem(e.Text, e.Line);
		}

		private void Search_SearchComplete(object sender, EventArgs e)
		{
			HideSearchProgress();
		}



		private void FindSearchTarget()
		{
			IDockContent activeDocument = DockPanel.ActiveDocument;
			if ((activeDocument != null) && (activeDocument is Document))
			{

				if (m_currentSearchingDocument != null)
				{
					UnregisterEvents();
				}

				m_currentSearchingDocument = activeDocument as Document;
				lstSearchResults.Items.Clear();
				tbSearchText.Text = "";
				if (m_currentSearchingDocument.XmlReadStream != null)
				{

					tbSearchText.Text = m_currentSearchingDocument.XmlReadStream.Search.SearchPhrase;
					lstSearchResults.BeginUpdate();
					foreach (KeyValuePair<int, string> searchResult in m_currentSearchingDocument.XmlReadStream.Search.SearchResults)
					{
						ListViewItem itmResult = new ListViewItem();
						itmResult.Text = searchResult.Value;
						itmResult.Tag = searchResult.Key;
						itmResult.SubItems.Add(searchResult.Key.ToString());
						lstSearchResults.Items.Add(itmResult);
					}
					lstSearchResults.EndUpdate();

					if (m_currentSearchingDocument.XmlReadStream.Search.IsSearching)
						DisplaySearchProgress();
					else
						HideSearchProgress();
					RegisterEvents();
				}
			}
		}
		private void btnFind_Click(object sender, EventArgs e)
		{
			SearchForText();
		}
		private void tbSearchText_KeyUp(object sender, KeyEventArgs e)
		{
			if (e.KeyCode == Keys.Enter)
				SearchForText();
		}

		private void SearchForText()
		{
			DisplaySearchProgress();
			lstSearchResults.Items.Clear();
			UnregisterEvents();
			RegisterEvents();
			m_currentSearchingDocument.XmlReadStream.SearchPhrase(tbSearchText.Text);
		}



		private void XmlReadStream_FoundItem(object sender, Streamer.EventArguments.FoundItemEventArgs e)
		{
			AddFoundItem(e.Text, e.Line);
		}


		private delegate void OnAddFoundItem(string Text, int LineNumber);
		private void AddFoundItem(string Text, int LineNumber)
		{
			if (InvokeRequired)
			{
				Invoke(new OnAddFoundItem(AddFoundItem), new object[] { Text, LineNumber });
			}
			else
			{
				ListViewItem itmFound = new ListViewItem();
				itmFound.Text = Text;
				itmFound.SubItems.Add(LineNumber.ToString());
				itmFound.Tag = LineNumber;
				lstSearchResults.Items.Add(itmFound);
			}
		}

		private void DisplaySearchProgress()
		{
			prgSearching.Style = ProgressBarStyle.Marquee;
			prgSearching.Visible = true;
		}
		private delegate void OnHideSearchProgress();
		private void HideSearchProgress()
		{
			if (InvokeRequired)
			{
				Invoke(new OnHideSearchProgress(HideSearchProgress));
			}
			else
			{
				prgSearching.Visible = false;
				prgSearching.Style = ProgressBarStyle.Blocks;
			}
		}

		private void tbSearchText_TextChanged(object sender, EventArgs e)
		{
			btnFind.Enabled = ((tbSearchText.TextLength > 0) && (tbSearchText.Text.ToLower() != "search text"));
		}

		private void SearchResults_Resize(object sender, EventArgs e)
		{
			lstSearchResults.Columns[0].Width = Width - lstSearchResults.Columns[1].Width - 24;
		}

		private void lstSearchResults_SelectedIndexChanged(object sender, EventArgs e)
		{
			if (m_currentSearchingDocument != null)
			{
				if (lstSearchResults.SelectedItems.Count > 0)
				{
					int scrollLine = int.Parse(lstSearchResults.SelectedItems[0].Tag.ToString());
					scrollLine = (scrollLine > 5) ? scrollLine - 5 : 0;
					m_currentSearchingDocument.Activate();
					m_currentSearchingDocument.Scroll(scrollLine);
					m_currentSearchingDocument.MarkSearchedText();
				}
			}
		}

		private void SearchResults_FormClosing(object sender, FormClosingEventArgs e)
		{
			DockPanel.ActiveDocumentChanged -= DockPanel_ActiveDocumentChanged;

			HideSearchProgress();
			tbSearchText.Text = null;

			if (m_currentSearchingDocument != null)
				UnregisterEvents();
		}




	}
}