RSS Feed Aggregator and Blogging Smart Client

// Copyright � 2005 by Omar Al Zabir. All rights are reserved.
// 
// If you like this code then feel free to go ahead and use it.
// The only thing I ask is that you don't remove or alter my copyright notice.
//
// Your use of this software is entirely at your own risk. I make no claims or
// warrantees about the reliability or fitness of this code for any particular purpose.
// If you make changes or additions to this code please mark your code as being yours.
// 
// website http://www.oazabir.com, email OmarAlZabir@gmail.com, msn oazabir@hotmail.com

using System;
using System.Text;
using System.Diagnostics;
using System.Drawing;
using System.Xml;
using System.IO;
using System.Xml.Xsl;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace RSSFeeder
{
	using RSSCommon;
	using RSSCommon.Helper;
	using Helpers;
	using RSSBlogAPI;

	/// <summary>
	/// Main Form which shows channels and RSS Feeds in preview window
	/// </summary>
	public class MainForm : System.Windows.Forms.Form
	{
		#region Constants

		private const int STARTUP_SHOW_CHANNEL_DURATION = 1000;
		private const int ON_SELECT_SHOW_CHANNEL_DURATION = 300;
		private const int FEED_SELECT_SHOW_DURATION = 1000;
		private const int SEARCH_RESULT_SHOW_INTERVAL = 1000;

		#endregion

		#region Designer
		private System.Windows.Forms.Splitter splitter1;
		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.Windows.Forms.MenuItem menuItem4;
		private System.Windows.Forms.StatusBar statusBar;
		private System.Windows.Forms.Panel mainPanel;
		private System.Windows.Forms.Panel leftPanel;
		private System.Windows.Forms.Splitter splitter2;
		private System.Windows.Forms.Panel rightPanel;
		private System.Windows.Forms.Splitter splitter3;
		private System.Windows.Forms.Panel propertiesPanel;
		private System.Windows.Forms.Panel feedPanel;
		private System.Windows.Forms.Panel previewPanel;
		private System.Windows.Forms.Panel panel1;
		private System.Windows.Forms.Panel panel2;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.Panel panel3;
		private System.Windows.Forms.PropertyGrid channelSetting;
		private System.Windows.Forms.ListView feedsListView;
		private System.Windows.Forms.ColumnHeader titleColumn;
		private System.Windows.Forms.ColumnHeader publishDateColumn;
		private RSSFeeder.DateFilterControl feedFilterDate;
		private System.Windows.Forms.Panel channelActions;
		private System.Windows.Forms.Button downloadAllButton;
		private System.Windows.Forms.Button downloadSelectedButton;
		private System.Windows.Forms.MenuItem exitMenuItem;
		private System.Windows.Forms.MenuItem addNewMenuItem;
		private System.Windows.Forms.MenuItem deleteMenuItem;
		private System.Windows.Forms.MenuItem optionesMenuItem;
		private System.Windows.Forms.MenuItem aboutMenuItem;
		private System.Windows.Forms.Panel panel5;
		private System.Windows.Forms.ListView channelListView;
		private System.Windows.Forms.ColumnHeader channelTitleColumn;
		private System.Windows.Forms.ColumnHeader lastUpdateColumn;
		private System.Windows.Forms.ColumnHeader countColumn;
		private System.Windows.Forms.Label boldLabel;
		private System.Windows.Forms.ContextMenu channelMenu;
		private System.Windows.Forms.MenuItem addNewChannelMenuItem;
		private System.Windows.Forms.MenuItem editMenuItem;
		private System.Windows.Forms.MenuItem deleteChannelMenuItem;
		private System.Windows.Forms.ContextMenu feedContextMenu;
		private System.Windows.Forms.MenuItem markAsReadMenuItem;
		private System.Windows.Forms.MenuItem markAsUnreadMenuItem;
		private System.Windows.Forms.MenuItem deleteFeedMenuItem;
		private System.Timers.Timer callbackTimer;
		private System.Windows.Forms.ImageList iconsImageList;
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Panel channelListPanel;
		private System.Windows.Forms.Splitter splitter4;
		private System.Windows.Forms.Panel previewTitlePanel;
		private System.Windows.Forms.Panel previewControlPanel;
		private AxSHDocVw.AxWebBrowser previewControl;
		private System.Windows.Forms.Panel panel6;
		private System.Windows.Forms.LinkLabel readBlogPaperLink;
		private System.Windows.Forms.Panel panel4;
		private System.Windows.Forms.TextBox searchTextBox;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.MenuItem importOPMLMenuItme;
		private System.Windows.Forms.MenuItem exportOPMLMenuItem;
		private System.Windows.Forms.OpenFileDialog openDialog;
		private System.Windows.Forms.SaveFileDialog saveDialog;
		private System.ComponentModel.IContainer components;

		public MainForm()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		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.components = new System.ComponentModel.Container();
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(MainForm));
			this.statusBar = new System.Windows.Forms.StatusBar();
			this.splitter1 = new System.Windows.Forms.Splitter();
			this.mainPanel = new System.Windows.Forms.Panel();
			this.rightPanel = new System.Windows.Forms.Panel();
			this.splitter4 = new System.Windows.Forms.Splitter();
			this.previewPanel = new System.Windows.Forms.Panel();
			this.previewControlPanel = new System.Windows.Forms.Panel();
			this.previewControl = new AxSHDocVw.AxWebBrowser();
			this.previewTitlePanel = new System.Windows.Forms.Panel();
			this.label4 = new System.Windows.Forms.Label();
			this.iconsImageList = new System.Windows.Forms.ImageList(this.components);
			this.feedPanel = new System.Windows.Forms.Panel();
			this.panel4 = new System.Windows.Forms.Panel();
			this.searchTextBox = new System.Windows.Forms.TextBox();
			this.label5 = new System.Windows.Forms.Label();
			this.panel6 = new System.Windows.Forms.Panel();
			this.readBlogPaperLink = new System.Windows.Forms.LinkLabel();
			this.boldLabel = new System.Windows.Forms.Label();
			this.feedsListView = new System.Windows.Forms.ListView();
			this.titleColumn = new System.Windows.Forms.ColumnHeader();
			this.publishDateColumn = new System.Windows.Forms.ColumnHeader();
			this.feedContextMenu = new System.Windows.Forms.ContextMenu();
			this.markAsReadMenuItem = new System.Windows.Forms.MenuItem();
			this.markAsUnreadMenuItem = new System.Windows.Forms.MenuItem();
			this.deleteFeedMenuItem = new System.Windows.Forms.MenuItem();
			this.panel3 = new System.Windows.Forms.Panel();
			this.label3 = new System.Windows.Forms.Label();
			this.feedFilterDate = new RSSFeeder.DateFilterControl();
			this.splitter2 = new System.Windows.Forms.Splitter();
			this.leftPanel = new System.Windows.Forms.Panel();
			this.propertiesPanel = new System.Windows.Forms.Panel();
			this.channelSetting = new System.Windows.Forms.PropertyGrid();
			this.panel2 = new System.Windows.Forms.Panel();
			this.label2 = new System.Windows.Forms.Label();
			this.splitter3 = new System.Windows.Forms.Splitter();
			this.channelListPanel = new System.Windows.Forms.Panel();
			this.panel5 = new System.Windows.Forms.Panel();
			this.channelListView = new System.Windows.Forms.ListView();
			this.channelTitleColumn = new System.Windows.Forms.ColumnHeader();
			this.countColumn = new System.Windows.Forms.ColumnHeader();
			this.lastUpdateColumn = new System.Windows.Forms.ColumnHeader();
			this.channelMenu = new System.Windows.Forms.ContextMenu();
			this.addNewChannelMenuItem = new System.Windows.Forms.MenuItem();
			this.editMenuItem = new System.Windows.Forms.MenuItem();
			this.deleteChannelMenuItem = new System.Windows.Forms.MenuItem();
			this.channelActions = new System.Windows.Forms.Panel();
			this.downloadAllButton = new System.Windows.Forms.Button();
			this.downloadSelectedButton = new System.Windows.Forms.Button();
			this.panel1 = new System.Windows.Forms.Panel();
			this.label1 = new System.Windows.Forms.Label();
			this.mainMenu1 = new System.Windows.Forms.MainMenu();
			this.menuItem1 = new System.Windows.Forms.MenuItem();
			this.exitMenuItem = new System.Windows.Forms.MenuItem();
			this.menuItem2 = new System.Windows.Forms.MenuItem();
			this.addNewMenuItem = new System.Windows.Forms.MenuItem();
			this.deleteMenuItem = new System.Windows.Forms.MenuItem();
			this.importOPMLMenuItme = new System.Windows.Forms.MenuItem();
			this.exportOPMLMenuItem = new System.Windows.Forms.MenuItem();
			this.menuItem3 = new System.Windows.Forms.MenuItem();
			this.optionesMenuItem = new System.Windows.Forms.MenuItem();
			this.menuItem4 = new System.Windows.Forms.MenuItem();
			this.aboutMenuItem = new System.Windows.Forms.MenuItem();
			this.callbackTimer = new System.Timers.Timer();
			this.openDialog = new System.Windows.Forms.OpenFileDialog();
			this.saveDialog = new System.Windows.Forms.SaveFileDialog();
			this.mainPanel.SuspendLayout();
			this.rightPanel.SuspendLayout();
			this.previewPanel.SuspendLayout();
			this.previewControlPanel.SuspendLayout();
			((System.ComponentModel.ISupportInitialize)(this.previewControl)).BeginInit();
			this.previewTitlePanel.SuspendLayout();
			this.feedPanel.SuspendLayout();
			this.panel4.SuspendLayout();
			this.panel6.SuspendLayout();
			this.panel3.SuspendLayout();
			this.leftPanel.SuspendLayout();
			this.propertiesPanel.SuspendLayout();
			this.panel2.SuspendLayout();
			this.channelListPanel.SuspendLayout();
			this.panel5.SuspendLayout();
			this.channelActions.SuspendLayout();
			this.panel1.SuspendLayout();
			((System.ComponentModel.ISupportInitialize)(this.callbackTimer)).BeginInit();
			this.SuspendLayout();
			// 
			// statusBar
			// 
			this.statusBar.Location = new System.Drawing.Point(0, 480);
			this.statusBar.Name = "statusBar";
			this.statusBar.Size = new System.Drawing.Size(824, 22);
			this.statusBar.TabIndex = 0;
			this.statusBar.Text = "Ready.";
			// 
			// splitter1
			// 
			this.splitter1.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.splitter1.Enabled = false;
			this.splitter1.Location = new System.Drawing.Point(0, 477);
			this.splitter1.Name = "splitter1";
			this.splitter1.Size = new System.Drawing.Size(824, 3);
			this.splitter1.TabIndex = 1;
			this.splitter1.TabStop = false;
			// 
			// mainPanel
			// 
			this.mainPanel.Controls.Add(this.rightPanel);
			this.mainPanel.Controls.Add(this.splitter2);
			this.mainPanel.Controls.Add(this.leftPanel);
			this.mainPanel.Dock = System.Windows.Forms.DockStyle.Fill;
			this.mainPanel.Location = new System.Drawing.Point(0, 0);
			this.mainPanel.Name = "mainPanel";
			this.mainPanel.Size = new System.Drawing.Size(824, 477);
			this.mainPanel.TabIndex = 2;
			// 
			// rightPanel
			// 
			this.rightPanel.Controls.Add(this.splitter4);
			this.rightPanel.Controls.Add(this.previewPanel);
			this.rightPanel.Controls.Add(this.feedPanel);
			this.rightPanel.Dock = System.Windows.Forms.DockStyle.Fill;
			this.rightPanel.Location = new System.Drawing.Point(203, 0);
			this.rightPanel.Name = "rightPanel";
			this.rightPanel.Size = new System.Drawing.Size(621, 477);
			this.rightPanel.TabIndex = 2;
			// 
			// splitter4
			// 
			this.splitter4.Location = new System.Drawing.Point(288, 0);
			this.splitter4.Name = "splitter4";
			this.splitter4.Size = new System.Drawing.Size(3, 477);
			this.splitter4.TabIndex = 3;
			this.splitter4.TabStop = false;
			// 
			// previewPanel
			// 
			this.previewPanel.BackColor = System.Drawing.Color.White;
			this.previewPanel.Controls.Add(this.previewControlPanel);
			this.previewPanel.Controls.Add(this.previewTitlePanel);
			this.previewPanel.Dock = System.Windows.Forms.DockStyle.Fill;
			this.previewPanel.Location = new System.Drawing.Point(288, 0);
			this.previewPanel.Name = "previewPanel";
			this.previewPanel.Size = new System.Drawing.Size(333, 477);
			this.previewPanel.TabIndex = 2;
			// 
			// previewControlPanel
			// 
			this.previewControlPanel.Controls.Add(this.previewControl);
			this.previewControlPanel.Dock = System.Windows.Forms.DockStyle.Fill;
			this.previewControlPanel.Location = new System.Drawing.Point(0, 24);
			this.previewControlPanel.Name = "previewControlPanel";
			this.previewControlPanel.Size = new System.Drawing.Size(333, 453);
			this.previewControlPanel.TabIndex = 5;
			// 
			// previewControl
			// 
			this.previewControl.ContainingControl = this;
			this.previewControl.Dock = System.Windows.Forms.DockStyle.Fill;
			this.previewControl.Enabled = true;
			this.previewControl.Location = new System.Drawing.Point(0, 0);
			this.previewControl.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("previewControl.OcxState")));
			this.previewControl.Size = new System.Drawing.Size(333, 453);
			this.previewControl.TabIndex = 0;
			this.previewControl.BeforeNavigate2 += new AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2EventHandler(this.previewControl_BeforeNavigate2);
			// 
			// previewTitlePanel
			// 
			this.previewTitlePanel.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("previewTitlePanel.BackgroundImage")));
			this.previewTitlePanel.Controls.Add(this.label4);
			this.previewTitlePanel.Dock = System.Windows.Forms.DockStyle.Top;
			this.previewTitlePanel.Location = new System.Drawing.Point(0, 0);
			this.previewTitlePanel.Name = "previewTitlePanel";
			this.previewTitlePanel.Size = new System.Drawing.Size(333, 24);
			this.previewTitlePanel.TabIndex = 4;
			// 
			// label4
			// 
			this.label4.BackColor = System.Drawing.Color.Transparent;
			this.label4.Font = new System.Drawing.Font("Tahoma", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label4.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.label4.ImageIndex = 14;
			this.label4.ImageList = this.iconsImageList;
			this.label4.Location = new System.Drawing.Point(5, 0);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(80, 24);
			this.label4.TabIndex = 1;
			this.label4.Text = "Preview";
			this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// iconsImageList
			// 
			this.iconsImageList.ImageSize = new System.Drawing.Size(16, 16);
			this.iconsImageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("iconsImageList.ImageStream")));
			this.iconsImageList.TransparentColor = System.Drawing.Color.Transparent;
			// 
			// feedPanel
			// 
			this.feedPanel.Controls.Add(this.panel4);
			this.feedPanel.Controls.Add(this.panel6);
			this.feedPanel.Controls.Add(this.boldLabel);
			this.feedPanel.Controls.Add(this.feedsListView);
			this.feedPanel.Controls.Add(this.panel3);
			this.feedPanel.Dock = System.Windows.Forms.DockStyle.Left;
			this.feedPanel.Location = new System.Drawing.Point(0, 0);
			this.feedPanel.Name = "feedPanel";
			this.feedPanel.Size = new System.Drawing.Size(288, 477);
			this.feedPanel.TabIndex = 0;
			// 
			// panel4
			// 
			this.panel4.Controls.Add(this.searchTextBox);
			this.panel4.Controls.Add(this.label5);
			this.panel4.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.panel4.Location = new System.Drawing.Point(0, 429);
			this.panel4.Name = "panel4";
			this.panel4.Size = new System.Drawing.Size(288, 24);
			this.panel4.TabIndex = 10;
			// 
			// searchTextBox
			// 
			this.searchTextBox.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.searchTextBox.Dock = System.Windows.Forms.DockStyle.Fill;
			this.searchTextBox.Location = new System.Drawing.Point(48, 0);
			this.searchTextBox.Name = "searchTextBox";
			this.searchTextBox.Size = new System.Drawing.Size(240, 21);
			this.searchTextBox.TabIndex = 5;
			this.searchTextBox.Text = "";
			this.searchTextBox.TextChanged += new System.EventHandler(this.searchTextBox_TextChanged);
			// 
			// label5
			// 
			this.label5.Dock = System.Windows.Forms.DockStyle.Left;
			this.label5.Location = new System.Drawing.Point(0, 0);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(48, 24);
			this.label5.TabIndex = 4;
			this.label5.Text = "Search:";
			this.label5.TextAlign = System.Drawing.ContentAlignment.MiddleLeft;
			// 
			// panel6
			// 
			this.panel6.Controls.Add(this.readBlogPaperLink);
			this.panel6.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.panel6.Location = new System.Drawing.Point(0, 453);
			this.panel6.Name = "panel6";
			this.panel6.Size = new System.Drawing.Size(288, 24);
			this.panel6.TabIndex = 9;
			// 
			// readBlogPaperLink
			// 
			this.readBlogPaperLink.Dock = System.Windows.Forms.DockStyle.Left;
			this.readBlogPaperLink.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.readBlogPaperLink.ImageIndex = 14;
			this.readBlogPaperLink.ImageList = this.iconsImageList;
			this.readBlogPaperLink.Location = new System.Drawing.Point(0, 0);
			this.readBlogPaperLink.Name = "readBlogPaperLink";
			this.readBlogPaperLink.Size = new System.Drawing.Size(144, 24);
			this.readBlogPaperLink.TabIndex = 4;
			this.readBlogPaperLink.TabStop = true;
			this.readBlogPaperLink.Text = "Read in Blogpaper";
			this.readBlogPaperLink.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
			this.readBlogPaperLink.LinkClicked += new System.Windows.Forms.LinkLabelLinkClickedEventHandler(this.readBlogPaperLink_LinkClicked);
			// 
			// boldLabel
			// 
			this.boldLabel.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.boldLabel.Location = new System.Drawing.Point(8, 32);
			this.boldLabel.Name = "boldLabel";
			this.boldLabel.TabIndex = 6;
			this.boldLabel.Text = "label5";
			this.boldLabel.Visible = false;
			// 
			// feedsListView
			// 
			this.feedsListView.BorderStyle = System.Windows.Forms.BorderStyle.None;
			this.feedsListView.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
																							this.titleColumn,
																							this.publishDateColumn});
			this.feedsListView.ContextMenu = this.feedContextMenu;
			this.feedsListView.Dock = System.Windows.Forms.DockStyle.Fill;
			this.feedsListView.ForeColor = System.Drawing.Color.DimGray;
			this.feedsListView.FullRowSelect = true;
			this.feedsListView.GridLines = true;
			this.feedsListView.HideSelection = false;
			this.feedsListView.Location = new System.Drawing.Point(0, 24);
			this.feedsListView.Name = "feedsListView";
			this.feedsListView.Size = new System.Drawing.Size(288, 453);
			this.feedsListView.SmallImageList = this.iconsImageList;
			this.feedsListView.TabIndex = 5;
			this.feedsListView.View = System.Windows.Forms.View.Details;
			this.feedsListView.KeyUp += new System.Windows.Forms.KeyEventHandler(this.feedsListView_KeyUp);
			this.feedsListView.SelectedIndexChanged += new System.EventHandler(this.feedsListView_SelectedIndexChanged);
			// 
			// titleColumn
			// 
			this.titleColumn.Text = "Title";
			this.titleColumn.Width = 200;
			// 
			// publishDateColumn
			// 
			this.publishDateColumn.Text = "Publish Date";
			this.publishDateColumn.Width = 100;
			// 
			// feedContextMenu
			// 
			this.feedContextMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																							this.markAsReadMenuItem,
																							this.markAsUnreadMenuItem,
																							this.deleteFeedMenuItem});
			// 
			// markAsReadMenuItem
			// 
			this.markAsReadMenuItem.Index = 0;
			this.markAsReadMenuItem.Text = "Mark as &Read";
			this.markAsReadMenuItem.Click += new System.EventHandler(this.markAsReadMenuItem_Click);
			// 
			// markAsUnreadMenuItem
			// 
			this.markAsUnreadMenuItem.Index = 1;
			this.markAsUnreadMenuItem.Text = "Mark as &Unread";
			this.markAsUnreadMenuItem.Click += new System.EventHandler(this.markAsUnreadMenuItem_Click);
			// 
			// deleteFeedMenuItem
			// 
			this.deleteFeedMenuItem.Index = 2;
			this.deleteFeedMenuItem.Text = "&Delete";
			this.deleteFeedMenuItem.Click += new System.EventHandler(this.deleteFeedMenuItem_Click);
			// 
			// panel3
			// 
			this.panel3.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("panel3.BackgroundImage")));
			this.panel3.Controls.Add(this.label3);
			this.panel3.Controls.Add(this.feedFilterDate);
			this.panel3.Dock = System.Windows.Forms.DockStyle.Top;
			this.panel3.Location = new System.Drawing.Point(0, 0);
			this.panel3.Name = "panel3";
			this.panel3.Size = new System.Drawing.Size(288, 24);
			this.panel3.TabIndex = 4;
			// 
			// label3
			// 
			this.label3.BackColor = System.Drawing.Color.Transparent;
			this.label3.Font = new System.Drawing.Font("Tahoma", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label3.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.label3.ImageIndex = 13;
			this.label3.ImageList = this.iconsImageList;
			this.label3.Location = new System.Drawing.Point(0, 0);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(64, 24);
			this.label3.TabIndex = 3;
			this.label3.Text = "Posts";
			this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// feedFilterDate
			// 
			this.feedFilterDate.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
			this.feedFilterDate.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
			this.feedFilterDate.Location = new System.Drawing.Point(171, 0);
			this.feedFilterDate.Name = "feedFilterDate";
			this.feedFilterDate.Size = new System.Drawing.Size(112, 21);
			this.feedFilterDate.TabIndex = 1;
			this.feedFilterDate.SelectedIndexChanged += new System.EventHandler(this.feedFilterDate_SelectedIndexChanged);
			// 
			// splitter2
			// 
			this.splitter2.Location = new System.Drawing.Point(200, 0);
			this.splitter2.Name = "splitter2";
			this.splitter2.Size = new System.Drawing.Size(3, 477);
			this.splitter2.TabIndex = 1;
			this.splitter2.TabStop = false;
			// 
			// leftPanel
			// 
			this.leftPanel.Controls.Add(this.propertiesPanel);
			this.leftPanel.Controls.Add(this.splitter3);
			this.leftPanel.Controls.Add(this.channelListPanel);
			this.leftPanel.Dock = System.Windows.Forms.DockStyle.Left;
			this.leftPanel.Location = new System.Drawing.Point(0, 0);
			this.leftPanel.Name = "leftPanel";
			this.leftPanel.Size = new System.Drawing.Size(200, 477);
			this.leftPanel.TabIndex = 0;
			// 
			// propertiesPanel
			// 
			this.propertiesPanel.BackColor = System.Drawing.Color.White;
			this.propertiesPanel.Controls.Add(this.channelSetting);
			this.propertiesPanel.Controls.Add(this.panel2);
			this.propertiesPanel.Dock = System.Windows.Forms.DockStyle.Fill;
			this.propertiesPanel.Location = new System.Drawing.Point(0, 451);
			this.propertiesPanel.Name = "propertiesPanel";
			this.propertiesPanel.Size = new System.Drawing.Size(200, 26);
			this.propertiesPanel.TabIndex = 2;
			// 
			// channelSetting
			// 
			this.channelSetting.CommandsBackColor = System.Drawing.Color.White;
			this.channelSetting.CommandsVisibleIfAvailable = true;
			this.channelSetting.Dock = System.Windows.Forms.DockStyle.Fill;
			this.channelSetting.LargeButtons = false;
			this.channelSetting.LineColor = System.Drawing.SystemColors.ScrollBar;
			this.channelSetting.Location = new System.Drawing.Point(0, 24);
			this.channelSetting.Name = "channelSetting";
			this.channelSetting.Size = new System.Drawing.Size(200, 2);
			this.channelSetting.TabIndex = 5;
			this.channelSetting.Text = "propertyGrid1";
			this.channelSetting.ToolbarVisible = false;
			this.channelSetting.ViewBackColor = System.Drawing.SystemColors.Window;
			this.channelSetting.ViewForeColor = System.Drawing.SystemColors.WindowText;
			this.channelSetting.PropertyValueChanged += new System.Windows.Forms.PropertyValueChangedEventHandler(this.channelSetting_PropertyValueChanged);
			// 
			// panel2
			// 
			this.panel2.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("panel2.BackgroundImage")));
			this.panel2.Controls.Add(this.label2);
			this.panel2.Dock = System.Windows.Forms.DockStyle.Top;
			this.panel2.Location = new System.Drawing.Point(0, 0);
			this.panel2.Name = "panel2";
			this.panel2.Size = new System.Drawing.Size(200, 24);
			this.panel2.TabIndex = 4;
			// 
			// label2
			// 
			this.label2.BackColor = System.Drawing.Color.Transparent;
			this.label2.Cursor = System.Windows.Forms.Cursors.Hand;
			this.label2.Font = new System.Drawing.Font("Tahoma", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label2.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.label2.ImageIndex = 6;
			this.label2.ImageList = this.iconsImageList;
			this.label2.Location = new System.Drawing.Point(0, 0);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(96, 24);
			this.label2.TabIndex = 0;
			this.label2.Text = "Properties";
			this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			this.label2.Click += new System.EventHandler(this.editMenuItem_Click);
			// 
			// splitter3
			// 
			this.splitter3.Dock = System.Windows.Forms.DockStyle.Top;
			this.splitter3.Location = new System.Drawing.Point(0, 448);
			this.splitter3.Name = "splitter3";
			this.splitter3.Size = new System.Drawing.Size(200, 3);
			this.splitter3.TabIndex = 1;
			this.splitter3.TabStop = false;
			// 
			// channelListPanel
			// 
			this.channelListPanel.Controls.Add(this.panel5);
			this.channelListPanel.Controls.Add(this.channelActions);
			this.channelListPanel.Controls.Add(this.panel1);
			this.channelListPanel.Dock = System.Windows.Forms.DockStyle.Top;
			this.channelListPanel.Location = new System.Drawing.Point(0, 0);
			this.channelListPanel.Name = "channelListPanel";
			this.channelListPanel.Size = new System.Drawing.Size(200, 448);
			this.channelListPanel.TabIndex = 0;
			// 
			// panel5
			// 
			this.panel5.Controls.Add(this.channelListView);
			this.panel5.Dock = System.Windows.Forms.DockStyle.Fill;
			this.panel5.Location = new System.Drawing.Point(0, 24);
			this.panel5.Name = "panel5";
			this.panel5.Size = new System.Drawing.Size(200, 392);
			this.panel5.TabIndex = 6;
			// 
			// channelListView
			// 
			this.channelListView.BorderStyle = System.Windows.Forms.BorderStyle.None;
			this.channelListView.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
																							  this.channelTitleColumn,
																							  this.countColumn,
																							  this.lastUpdateColumn});
			this.channelListView.ContextMenu = this.channelMenu;
			this.channelListView.Dock = System.Windows.Forms.DockStyle.Fill;
			this.channelListView.ForeColor = System.Drawing.Color.DimGray;
			this.channelListView.FullRowSelect = true;
			this.channelListView.GridLines = true;
			this.channelListView.HideSelection = false;
			this.channelListView.Location = new System.Drawing.Point(0, 0);
			this.channelListView.Name = "channelListView";
			this.channelListView.Size = new System.Drawing.Size(200, 392);
			this.channelListView.SmallImageList = this.iconsImageList;
			this.channelListView.Sorting = System.Windows.Forms.SortOrder.Ascending;
			this.channelListView.TabIndex = 5;
			this.channelListView.View = System.Windows.Forms.View.Details;
			this.channelListView.KeyUp += new System.Windows.Forms.KeyEventHandler(this.channelListView_KeyUp);
			this.channelListView.SelectedIndexChanged += new System.EventHandler(this.channelListView_SelectedIndexChanged);
			// 
			// channelTitleColumn
			// 
			this.channelTitleColumn.Text = "Title";
			this.channelTitleColumn.Width = 160;
			// 
			// countColumn
			// 
			this.countColumn.Text = "No.";
			this.countColumn.Width = 40;
			// 
			// lastUpdateColumn
			// 
			this.lastUpdateColumn.Text = "Last Update";
			this.lastUpdateColumn.Width = 100;
			// 
			// channelMenu
			// 
			this.channelMenu.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																						this.addNewChannelMenuItem,
																						this.editMenuItem,
																						this.deleteChannelMenuItem});
			// 
			// addNewChannelMenuItem
			// 
			this.addNewChannelMenuItem.Index = 0;
			this.addNewChannelMenuItem.Text = "&Add New Channel...";
			this.addNewChannelMenuItem.Click += new System.EventHandler(this.addNewMenuItem_Click);
			// 
			// editMenuItem
			// 
			this.editMenuItem.Index = 1;
			this.editMenuItem.Text = "&Edit";
			this.editMenuItem.Click += new System.EventHandler(this.editMenuItem_Click);
			// 
			// deleteChannelMenuItem
			// 
			this.deleteChannelMenuItem.Index = 2;
			this.deleteChannelMenuItem.Text = "&Delete";
			this.deleteChannelMenuItem.Click += new System.EventHandler(this.deleteMenuItem_Click);
			// 
			// channelActions
			// 
			this.channelActions.BackColor = System.Drawing.SystemColors.Control;
			this.channelActions.Controls.Add(this.downloadAllButton);
			this.channelActions.Controls.Add(this.downloadSelectedButton);
			this.channelActions.Dock = System.Windows.Forms.DockStyle.Bottom;
			this.channelActions.Location = new System.Drawing.Point(0, 416);
			this.channelActions.Name = "channelActions";
			this.channelActions.Size = new System.Drawing.Size(200, 32);
			this.channelActions.TabIndex = 5;
			// 
			// downloadAllButton
			// 
			this.downloadAllButton.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.downloadAllButton.ImageIndex = 11;
			this.downloadAllButton.ImageList = this.iconsImageList;
			this.downloadAllButton.Location = new System.Drawing.Point(104, 0);
			this.downloadAllButton.Name = "downloadAllButton";
			this.downloadAllButton.Size = new System.Drawing.Size(96, 32);
			this.downloadAllButton.TabIndex = 1;
			this.downloadAllButton.Text = "Download All";
			this.downloadAllButton.Click += new System.EventHandler(this.downloadAllButton_Click);
			// 
			// downloadSelectedButton
			// 
			this.downloadSelectedButton.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.downloadSelectedButton.ImageIndex = 11;
			this.downloadSelectedButton.ImageList = this.iconsImageList;
			this.downloadSelectedButton.Location = new System.Drawing.Point(0, 0);
			this.downloadSelectedButton.Name = "downloadSelectedButton";
			this.downloadSelectedButton.Size = new System.Drawing.Size(104, 32);
			this.downloadSelectedButton.TabIndex = 0;
			this.downloadSelectedButton.Text = "Download Selected";
			this.downloadSelectedButton.Click += new System.EventHandler(this.downloadSelectedButton_Click);
			// 
			// panel1
			// 
			this.panel1.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("panel1.BackgroundImage")));
			this.panel1.Controls.Add(this.label1);
			this.panel1.Dock = System.Windows.Forms.DockStyle.Top;
			this.panel1.Location = new System.Drawing.Point(0, 0);
			this.panel1.Name = "panel1";
			this.panel1.Size = new System.Drawing.Size(200, 24);
			this.panel1.TabIndex = 3;
			// 
			// label1
			// 
			this.label1.BackColor = System.Drawing.Color.Transparent;
			this.label1.Font = new System.Drawing.Font("Tahoma", 11.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.label1.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft;
			this.label1.ImageIndex = 12;
			this.label1.ImageList = this.iconsImageList;
			this.label1.Location = new System.Drawing.Point(0, 0);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(112, 24);
			this.label1.TabIndex = 1;
			this.label1.Text = "Subscription";
			this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
			// 
			// mainMenu1
			// 
			this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.menuItem1,
																					  this.menuItem2,
																					  this.menuItem3,
																					  this.menuItem4});
			// 
			// menuItem1
			// 
			this.menuItem1.Index = 0;
			this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.exitMenuItem});
			this.menuItem1.Text = "&File";
			// 
			// exitMenuItem
			// 
			this.exitMenuItem.Index = 0;
			this.exitMenuItem.Text = "E&xit";
			this.exitMenuItem.Click += new System.EventHandler(this.exitMenuItem_Click);
			// 
			// menuItem2
			// 
			this.menuItem2.Index = 1;
			this.menuItem2.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.addNewMenuItem,
																					  this.deleteMenuItem,
																					  this.importOPMLMenuItme,
																					  this.exportOPMLMenuItem});
			this.menuItem2.Text = "&Channels";
			// 
			// addNewMenuItem
			// 
			this.addNewMenuItem.Index = 0;
			this.addNewMenuItem.Text = "&Add New RSS Feed source...";
			this.addNewMenuItem.Click += new System.EventHandler(this.addNewMenuItem_Click);
			// 
			// deleteMenuItem
			// 
			this.deleteMenuItem.Index = 1;
			this.deleteMenuItem.Text = "&Delete selected Channels";
			this.deleteMenuItem.Click += new System.EventHandler(this.deleteMenuItem_Click);
			// 
			// importOPMLMenuItme
			// 
			this.importOPMLMenuItme.Index = 2;
			this.importOPMLMenuItme.Text = "&Import Channels from OPML...";
			this.importOPMLMenuItme.Click += new System.EventHandler(this.importOPMLMenuItme_Click);
			// 
			// exportOPMLMenuItem
			// 
			this.exportOPMLMenuItem.Index = 3;
			this.exportOPMLMenuItem.Text = "&Export selected Channels to OPML...";
			this.exportOPMLMenuItem.Click += new System.EventHandler(this.exportOPMLMenuItem_Click);
			// 
			// menuItem3
			// 
			this.menuItem3.Index = 2;
			this.menuItem3.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.optionesMenuItem});
			this.menuItem3.Text = "&Tools";
			// 
			// optionesMenuItem
			// 
			this.optionesMenuItem.Index = 0;
			this.optionesMenuItem.Text = "&Options";
			this.optionesMenuItem.Click += new System.EventHandler(this.optionesMenuItem_Click);
			// 
			// menuItem4
			// 
			this.menuItem4.Index = 3;
			this.menuItem4.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																					  this.aboutMenuItem});
			this.menuItem4.Text = "&Help";
			// 
			// aboutMenuItem
			// 
			this.aboutMenuItem.Index = 0;
			this.aboutMenuItem.Text = "&About";
			this.aboutMenuItem.Click += new System.EventHandler(this.aboutMenuItem_Click);
			// 
			// callbackTimer
			// 
			this.callbackTimer.Interval = 1000;
			this.callbackTimer.SynchronizingObject = this;
			this.callbackTimer.Elapsed += new System.Timers.ElapsedEventHandler(this.callbackTimer_Elapsed);
			// 
			// MainForm
			// 
			this.AllowDrop = true;
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
			this.ClientSize = new System.Drawing.Size(824, 502);
			this.Controls.Add(this.mainPanel);
			this.Controls.Add(this.splitter1);
			this.Controls.Add(this.statusBar);
			this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Menu = this.mainMenu1;
			this.Name = "MainForm";
			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
			this.Text = "RSS Feeder";
			this.Closing += new System.ComponentModel.CancelEventHandler(this.MainForm_Closing);
			this.Load += new System.EventHandler(this.MainForm_Load);
			this.DragDrop += new System.Windows.Forms.DragEventHandler(this.MainForm_DragDrop);
			this.DragEnter += new System.Windows.Forms.DragEventHandler(this.MainForm_DragEnter);
			this.Deactivate += new System.EventHandler(this.MainForm_Deactivate);
			this.mainPanel.ResumeLayout(false);
			this.rightPanel.ResumeLayout(false);
			this.previewPanel.ResumeLayout(false);
			this.previewControlPanel.ResumeLayout(false);
			((System.ComponentModel.ISupportInitialize)(this.previewControl)).EndInit();
			this.previewTitlePanel.ResumeLayout(false);
			this.feedPanel.ResumeLayout(false);
			this.panel4.ResumeLayout(false);
			this.panel6.ResumeLayout(false);
			this.panel3.ResumeLayout(false);
			this.leftPanel.ResumeLayout(false);
			this.propertiesPanel.ResumeLayout(false);
			this.panel2.ResumeLayout(false);
			this.channelListPanel.ResumeLayout(false);
			this.panel5.ResumeLayout(false);
			this.channelActions.ResumeLayout(false);
			this.panel1.ResumeLayout(false);
			((System.ComponentModel.ISupportInitialize)(this.callbackTimer)).EndInit();
			this.ResumeLayout(false);

		}
		#endregion

		#endregion

		#region Private Methods

		private MethodInvoker _CallbackMethod = null;

		//private WebLogMenuHelper _WebLogMenuHelper;
		/// <summary>
		/// Load all channels from database and populate the channel list view
		/// </summary>
		private void LoadChannels()
		{
			this.RefreshChannels();

			//this._WebLogMenuHelper = new WebLogMenuHelper( this.webLogMenu, this );
			//this._WebLogMenuHelper.RefreshWebLogMenu();
			//if( channelListView.Items.Count > 0 )
			//	channelListView.Items[0].Selected = true;
		}
		
		private ListViewItem AddChannelInListView( Channel channel )
		{
			ListViewItem item = new ListViewItem( new string[] { channel.Title, channel.UnreadCount.ToString(), channel.LastUpdated.ToString() }, 10 );
			item.Tag = channel;
			channelListView.Items.Add( item );
			
			if( channel.UnreadCount > 0 )
				item.Font = boldLabel.Font;
			else
				item.Font = base.Font;

			return item;
		}

		/// <summary>
		/// Show channel properties of the selected channels.
		/// </summary>
		private void UpdateChannelProperties()
		{
			channelSetting.SelectedObjects = this.GetSelectedChannels().ToArray();
		}

		/// <summary>
		/// Prepare a list of selected channels from the channel list view
		/// </summary>
		/// <returns></returns>
		private ArrayList GetSelectedChannels()
		{
			ArrayList list = new ArrayList();

			foreach( ListViewItem item in channelListView.SelectedItems )
			{
				list.Add( item.Tag );
			}

			return list;
		}

		/// <summary>
		/// Delete selected channel(s) from database, permanently
		/// </summary>
		private void DeleteChannel()
		{
			if( DialogResult.No == MessageBox.Show( this, 
				"Are you sure you want to delete the selected channels?", 
				"Warning", MessageBoxButtons.YesNo, MessageBoxIcon.Warning ) )
				return;

			// Delete selected channels
			foreach( Channel channel in this.GetSelectedChannels() )
			{
				DatabaseHelper.DeleteChannel( channel.Id );
			}

			// Refresh the list
			this.RefreshChannels();
		}

		/// <summary>
		/// Show feeds from selected channel
		/// </summary>
		private void ShowFeeds()
		{
			if( 0 == channelListView.SelectedItems.Count )
			{
				feedsListView.Items.Clear();
				return;
			}
			
			// Get the first selected channel
			Channel channel = (Channel)channelListView.SelectedItems[0].Tag;

			// Load rss feeds
			DateTime dateAfter = feedFilterDate.SelectedItem.DateTime;
			IList feeds = DatabaseHelper.GetRssItems( channel.Id, dateAfter );

			this.ShowFeeds( feeds );			
		}

		/// <summary>
		/// Show the specified collection of feed in feed list
		/// </summary>
		/// <param name="feeds"></param>
		private void ShowFeeds( IList feeds )
		{
			// populate the rss feed list view
			feedsListView.Items.Clear();
			foreach( RssFeed feed in feeds )
			{
				ListViewItem item = new ListViewItem( new string [] { feed.Title, feed.PublishDate.ToString() }, 9 );
				item.Tag = feed;

				if( !feed.IsRead ) item.Font = boldLabel.Font;

				feedsListView.Items.Add( item );
			}

			if( 0 < feedsListView.Items.Count )
			{
				feedsListView.Items[0].Selected = true;
			}
		}

		/// <summary>
		/// Return an RssFeed object collection of the selected posts in the post list view
		/// </summary>
		/// <returns></returns>
		private ArrayList GetSelectedPosts()
		{
			ArrayList posts = new ArrayList();
			foreach( ListViewItem item in feedsListView.SelectedItems )
			{
				posts.Add( item.Tag );
			}
			return posts;
		}

		/// <summary>
		/// Preview currently selected item
		/// </summary>
		private void ViewPreview()
		{
			ArrayList posts = this.GetSelectedPosts();
			if( 0 == posts.Count ) return;

			// Show the last item in the selection
			RssFeed feed = posts[ posts.Count-1 ] as RssFeed;

			// change the font of the current item
			feedsListView.SelectedItems[ feedsListView.SelectedItems.Count - 1 ].Font = base.Font;

			this.ShowFeed( feed );
		}

		private Channel GetChannel( int channelID )
		{
			foreach( ListViewItem item in this.channelListView.Items )
			{
				Channel channel = item.Tag as Channel;
				if( channel.Id == channelID )
					return channel;
			}

			return null;
		}
		/// <summary>
		/// Shwo a feed in the preview pane
		/// </summary>
		/// <param name="feed"></param>
		private void ShowFeed( RssFeed feed )
		{
			// Get the XSLT for transforming
			Channel channel = this.GetChannel(feed.ChannelID);
			if( null == channel ) return;

			string xsltFile = channel.XSLPath;

			// If none specified in the channel, look in the global setting
			if( null == xsltFile || 0 == xsltFile.Length ) xsltFile = Configuration.Instance.XSLFileName;

			string tempFilePath = Path.Combine( ApplicationSettings.ApplicationDataPath, "Preview.html" );

			// Generate a temporary HTML file for preview
			FileStream file = new FileStream( tempFilePath, FileMode.Create );
			//XMLHelper.GenerateXMLForChannel( xsltFile, feed.XML, file );
			XMLHelper.TransformXml( xsltFile, feed.XML, file );
			file.Close();

			// Show preview of the post
			this.ShowUrl( tempFilePath );

			DatabaseHelper.MarkAsRead( true, feed.Guid, feed.ChannelID, false );
			
			// Make refresh channel as due
			this._CallbackMethod = new MethodInvoker( this.RecalculateAndRefresh );
			callbackTimer.Stop();
			callbackTimer.Interval = FEED_SELECT_SHOW_DURATION;
			callbackTimer.Start();
		}
		/// <summary>
		/// Shows the specified URL in a browser control
		/// </summary>
		/// <param name="url"></param>
		private void ShowUrl( object url )
		{
			object nil = System.Reflection.Missing.Value;			
			previewControl.Navigate2( ref url, ref nil, ref nil, ref nil, ref nil );
			
			#region Old Code
			/*
			AxSHDocVw.AxWebBrowser previewControl = this.EnsureBrowserControl();
			
			object nil = System.Reflection.Missing.Value;
			object flags = BrowserNavConstants.navNoReadFromCache | BrowserNavConstants.navNoWriteToCache;
			object blank = "about:blank";
			
			try
			{
				//previewControl.Navigate2( ref blank );
				previewControl.Navigate2( ref url, ref flags, ref nil, ref nil, ref nil );
			}
			catch( Exception x )
			{
				Debug.WriteLine( x );
				EntLibHelper.Exception( "Preview", x );
			}
			*/
			#endregion
		}
		
		#region Old Code
		/*
		/// <summary>
		/// Creates a browser control is not already shown
		/// </summary>
		/// <returns></returns>
		private AxSHDocVw.AxWebBrowser EnsureBrowserControl()
		{
			foreach( Control c in previewPanel.Controls )
			{
				if( c is AxSHDocVw.AxWebBrowser )
					return c as AxSHDocVw.AxWebBrowser;
			}

			previewPanel.SuspendLayout();
			
			AxSHDocVw.AxWebBrowser browser = new AxSHDocVw.AxWebBrowser();
			//browser.BeforeNavigate2 += new AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2EventHandler(previewControl_BeforeNavigate2);
			browser.AllowDrop = false;
			browser.NewWindow3 += new AxSHDocVw.DWebBrowserEvents2_NewWindow3EventHandler(previewControl_NewWindow3);
			browser.Dock = DockStyle.Fill;
			browser.Visible = true;
			previewControlPanel.Controls.Add( browser );

			previewControlPanel.ResumeLayout();

			return browser;
		}*/
		#endregion

		/// <summary>
		/// Get the selected chanel in list view. If there is multiple selection, the 
		/// first item is returned
		/// </summary>
		/// <returns></returns>
		private Channel GetCurrentlySelecetdChannel()
		{
			if( 0 == channelListView.SelectedItems.Count ) return null;
			return (Channel)channelListView.SelectedItems[0].Tag;
		}

		private void RecalculateAndRefresh()
		{
			Channel channel = this.GetCurrentlySelecetdChannel();
			if( null == channel ) return;
			
			// Recalculate item count of this channel
			DatabaseHelper.RefreshChannelCounts( channel.Id );
			
			// Refresh list view
			this.RefreshChannels();
		}

		/// <summary>
		/// Download selected channels
		/// </summary>
		private void DownloadSelectedChannels()
		{
			IList channels = this.GetSelectedChannels();
			RSSHelper.DownloadChannels( this, channels, new EventHandler( this.DownloadComplete ) );
		}

		/// <summary>
		/// Download all channels
		/// </summary>
		private void DownloadAllChannels()
		{
			ArrayList channels = new ArrayList();
			foreach( ListViewItem item in this.channelListView.Items )
			{
				channels.Add( item.Tag );
			}

			RSSHelper.DownloadChannels( this, channels, new EventHandler( this.DownloadComplete ) );
		}

		private void DownloadComplete( object sender, EventArgs e )
		{
			// Refresh channel list
			this.RefreshChannels();

			// Show currently selected channel feeds
			this.ShowFeeds();
		}
		/// <summary>
		/// Show the Global Options dialog
		/// </summary>
		private void ShowOptions()
		{
			PropertyView form = new PropertyView();
			
			form.SelectedObject = Configuration.Instance;

			base.AddOwnedForm( form );
			form.Show( );
		
			form.Closing += new CancelEventHandler(form_Closing);
		}

		/// <summary>
		/// Show About Dialog
		/// </summary>
		private void ShowAbout()
		{
			using( AboutForm form = new AboutForm() )
			{
				form.ShowDialog( this );
			}
		}

		private void MarkSelectedItems( bool isRead )
		{
			// 1. Get selected feeds
			IList feeds = this.GetSelectedPosts();

			if( 0 == feeds.Count ) return;

			// 2. Mark as read
			int channelId = 0;
			foreach( RssFeed feed in feeds )
			{
				channelId = feed.ChannelID;
				DatabaseHelper.MarkAsRead( isRead, feed.Guid, feed.ChannelID, false );
			}

			DatabaseHelper.RefreshChannelCounts( channelId );

			// 3. Change post font
			feedsListView.BeginUpdate();
			foreach( ListViewItem item in feedsListView.SelectedItems )
			{
				item.Font = boldLabel.Font;
			}
			feedsListView.EndUpdate();

			// 4. Refresh channel list
			this.RefreshChannels();
		}

		private void DeleteSelectedItems()
		{
			// 1. Get selected feeds
			IList feeds = this.GetSelectedPosts();

			if( 0 == feeds.Count ) return;

			// 2. Delete feed
			int channelId = 0;
			foreach( RssFeed feed in feeds )
			{
				channelId = feed.ChannelID;
				DatabaseHelper.DeleteFeed( feed.Guid, feed.ChannelID, false );
			}

			DatabaseHelper.RefreshChannelCounts( channelId );

			// 3. Remove items from list view
			feedsListView.BeginUpdate();
			foreach( ListViewItem item in feedsListView.SelectedItems )
			{
				feedsListView.Items.Remove( item );
			}
			feedsListView.EndUpdate();

			// 4. Refresh channel list
			this.RefreshChannels();
		}

		private void RefreshChannels()
		{
			// 1. Get recent channel list
			IList channels = DatabaseHelper.GetChannels();
			IList deletedChannels = new ArrayList();

			// 2. Update status in list view
			foreach( ListViewItem item in channelListView.Items )
			{
				bool isFound = false;
				foreach( Channel channel in channels )
				{
					Channel channelInListView = item.Tag as Channel;

					if( channelInListView.Id == channel.Id )
					{
						isFound = true;

						// Update list view item texts
						this.UpdateChannelInListView( item, channel );

						break;
					}
				}

				if( !isFound )
				{
					// Delete the channel from list view
					deletedChannels.Add( item );
				}
			}

			// 3. Delete the removed channels
			foreach( ListViewItem item in deletedChannels )
			{
				channelListView.Items.Remove( item );
			}

			// 4. If is any channel was added in the meantime but not in list
			foreach( Channel channel in channels )
			{
				bool isFound = false;
				foreach( ListViewItem item in channelListView.Items )
				{
					Channel channelInListView = item.Tag as Channel;

					if( channelInListView.Id == channel.Id )
					{
						isFound = true;
						break;
					}
				}

				if( !isFound )
				{
					// Add new channel
					channelListView.SelectedItems.Clear();
					ListViewItem newItem = this.AddChannelInListView( channel );
					newItem.Selected = true;
					newItem.EnsureVisible();
				}
			}

		}

		/// <summary>
		/// Refresh the list view item with current channel information
		/// </summary>
		/// <param name="item"></param>
		/// <param name="channel"></param>
		private void UpdateChannelInListView( ListViewItem item, Channel channel )
		{
			item.Text = channel.Title;
			item.SubItems[1].Text = channel.UnreadCount.ToString();
			item.SubItems[2].Text = channel.LastUpdated.ToString();

			item.Tag = channel;

			if( channel.UnreadCount > 0 )
				item.Font = boldLabel.Font;
			else
				item.Font = base.Font;
		}

		/// <summary>
		/// Update the currently selected channels
		/// </summary>
		private void UpdateChannel()
		{
			IList channels = this.GetSelectedChannels();
			if( 0 == channels.Count ) return;

			foreach( Channel channel in channels )
				DatabaseHelper.UpdateChannel( channel );

			this.RefreshChannels();
		}
		
		private void AutoSelectChannel()
		{
			int channelId = (int)this.Tag;

			foreach( ListViewItem item in channelListView.Items )
			{
				Channel channelInListView = item.Tag as Channel;
				if( channelInListView.Id == channelId )
				{
					channelListView.SelectedItems.Clear();
					item.Selected = true;

					break;
				}																	
			}
		}

		private void ShowNewspaperView()
		{
			Channel channel = this.GetCurrentlySelecetdChannel();
			if( null == channel ) return;

			EntryPoint.ShowNewspaper( channel.Id );

			this.Close();
		}

		private void AddNewChannel( string url )
		{
			using( AddNewChannel form = new AddNewChannel() )
			{
				form.Url = url;
				form.OnDownloadComplete = new EventHandler(this.DownloadComplete);
				if( DialogResult.OK == form.ShowDialog( this ) )
					this.RefreshChannels();
			}
		}
		
		private void DeliverPendingPosts()
		{
			RSSHelper.DownloadChannels( this, new ArrayList(), new EventHandler( DownloadComplete ) );
		}
	
		private void SearchFeed( string text )
		{
			IList feeds = DatabaseHelper.SearchFeed( text.Trim() );
			this.ShowFeeds( feeds );
		}

		private void ImportOPML()
		{
			openDialog.Filter = "OPML (*.opml)|*.opml";
			if( DialogResult.OK == openDialog.ShowDialog( this ) )
			{
				IList importedChannels = OPMLHelper.ImportOPML( openDialog.FileName );

				StringBuilder message = new StringBuilder();

				foreach( Channel channel in importedChannels )
				{
					message.Append( channel.Title );
					message.Append( Environment.NewLine );
				}

				MessageBox.Show( this, "Imported Channles: " + Environment.NewLine + message,
					"Import OPML", MessageBoxButtons.OK, MessageBoxIcon.Information );
				
				this.RefreshChannels();
			}

		}

		private void ExportOPML()
		{
			saveDialog.Filter = "OPML (*.opml)|*.opml";
			if( DialogResult.OK == saveDialog.ShowDialog( this ) )
			{
				IList selectedChannels = this.GetSelectedChannels();

				OPMLHelper.ExportOPML( selectedChannels, saveDialog.FileName );

				MessageBox.Show( this, "OPML Exported complete." , "OPML Export", 
					MessageBoxButtons.OK, MessageBoxIcon.Information );
			}
		}

		private void ShowCurrentChannel()
		{
			this.UpdateChannelProperties();
			this.ShowFeeds();
		}

		#endregion

		#region Public Methods

		/// <summary>
		/// Preselct a channel to show after load
		/// </summary>
		/// <param name="channelId"></param>
		public void ShowChannel( int channelId )
		{
			// Store the channel ID somewhere so that after a while we can get it
			this.Tag = channelId;

			// Make a callback method to call after a while to auto select the channel in list view
			this._CallbackMethod = new MethodInvoker( this.AutoSelectChannel );
			this.callbackTimer.Interval = STARTUP_SHOW_CHANNEL_DURATION;
			this.callbackTimer.Start();
		}

		#endregion

		#region Control Events

		private void MainForm_Load(object sender, System.EventArgs e)
		{
			// Restore window position
			if( Rectangle.Empty != Configuration.Instance.WindowBounds )
			{
				base.Bounds = Configuration.Instance.WindowBounds;
				base.WindowState = (FormWindowState)Configuration.Instance.WindowState;
			}

			this.LoadChannels();

			object url = Path.Combine( AppDomain.CurrentDomain.BaseDirectory, "docs\\Welcome.html" );
			this.ShowUrl( url );
		}

		private void channelListView_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			this._CallbackMethod = new MethodInvoker( this.ShowCurrentChannel );
			this.callbackTimer.Interval = ON_SELECT_SHOW_CHANNEL_DURATION;
			this.callbackTimer.Start();
		}

		private void feedsListView_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			this.ViewPreview();
		}

		private void downloadSelectedButton_Click(object sender, System.EventArgs e)
		{
			this.DownloadSelectedChannels();
		}

		private void downloadAllButton_Click(object sender, System.EventArgs e)
		{
			this.DownloadAllChannels();
		}

		private void feedFilterDate_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			this.ShowFeeds();
		}

		private void exitMenuItem_Click(object sender, System.EventArgs e)
		{
			this.Close();
		}

		private void addNewMenuItem_Click(object sender, System.EventArgs e)
		{
			this.AddNewChannel( string.Empty );
		}

		private void deleteMenuItem_Click(object sender, System.EventArgs e)
		{
			this.DeleteChannel();
		}

		private void optionesMenuItem_Click(object sender, System.EventArgs e)
		{
			this.ShowOptions();
		}

		private void aboutMenuItem_Click(object sender, System.EventArgs e)
		{
			this.ShowAbout();
		}

		private void editMenuItem_Click(object sender, System.EventArgs e)
		{
			this.channelSetting.Focus();
			this.channelListPanel.Height = this.leftPanel.Height/2;
		}

		private void markAsReadMenuItem_Click(object sender, System.EventArgs e)
		{
			this.MarkSelectedItems( true );
		}

		private void markAsUnreadMenuItem_Click(object sender, System.EventArgs e)
		{
			this.MarkSelectedItems( false );
		}

		private void deleteFeedMenuItem_Click(object sender, System.EventArgs e)
		{
			this.DeleteSelectedItems();
		}

		private void callbackTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
		{
			callbackTimer.Stop();

			if( null != this._CallbackMethod )
				this._CallbackMethod();

			this._CallbackMethod = null;
			
		}

		private void channelSetting_PropertyValueChanged(object s, System.Windows.Forms.PropertyValueChangedEventArgs e)
		{
			this.UpdateChannel();
		}

		private void readBlogPaperLink_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
		{
			this.ShowNewspaperView();
		}

		private void previewControl_BeforeNavigate2(object sender, AxSHDocVw.DWebBrowserEvents2_BeforeNavigate2Event e)
		{			
			// User has probably dragged a page or RSS to the browser. So, let's try adding a channel from it
			string url = e.uRL as string;
			if( null == url ) return;
			
			if( BrowserHelper.IsURLFile( url ) || url == "about:blank" ) 
			{				
				return;
			}
			else
			{
				e.cancel = true;
				// User has dragged an URL to this browser, perform RSS discovery
				//this.AddNewChannel( e.uRL as string );
				BrowserHelper.BrowseURL( url );
			}
		}

		private void previewControl_NewWindow3(object sender, AxSHDocVw.DWebBrowserEvents2_NewWindow3Event e)
		{
			e.cancel = BrowserHelper.BrowseURL( e.bstrUrl );
		}

		
		private void form_Closing(object sender, CancelEventArgs e)
		{
			(sender as Form).Closing -= new CancelEventHandler(form_Closing);
			base.Activate();
		}

		private void MainForm_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
		{
			BrowserHelper.DragEnter( e );
		}

		private void MainForm_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
		{
			string hyperLinkUrl = BrowserHelper.GetDroppedURL( e );
			if( null == hyperLinkUrl || 0 == hyperLinkUrl.Length )
				return;

			this.AddNewChannel( hyperLinkUrl );
			
		}

		private void MainForm_Deactivate(object sender, System.EventArgs e)
		{
			MemoryHelper.ReduceMemory();
		}

		private void MainForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
		{
			if( base.WindowState == FormWindowState.Normal )
				Configuration.Instance.WindowBounds = base.Bounds;

			if( base.WindowState != FormWindowState.Minimized )
				Configuration.Instance.WindowState = (int)base.WindowState;
		}

//		private void addNewWebLogMenuItem_Click(object sender, System.EventArgs e)
//		{
//			this._WebLogMenuHelper.NewWebLog();
//		}

		
		private void deliverPendingPostsMenuItem_Click(object sender, System.EventArgs e)
		{
			this.DeliverPendingPosts();
		}

		private void searchTextBox_TextChanged(object sender, System.EventArgs e)
		{
			this._CallbackMethod = new MethodInvoker(this.Search);
			this.callbackTimer.Stop();
			this.callbackTimer.Interval = SEARCH_RESULT_SHOW_INTERVAL;
			this.callbackTimer.Start();
		}

		private void Search()
		{
			base.Cursor = Cursors.AppStarting;
			base.Refresh();

			this.SearchFeed( searchTextBox.Text );

			base.Cursor = Cursors.Default;
		}
		
		private void importOPMLMenuItme_Click(object sender, System.EventArgs e)
		{
			this.ImportOPML();
		}

		private void exportOPMLMenuItem_Click(object sender, System.EventArgs e)
		{
			this.ExportOPML();
		}

		
		private void channelListView_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
		{
			if( e.KeyCode == Keys.Delete )
				this.deleteMenuItem_Click( sender, e );
		}

		private void feedsListView_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
		{
			if( e.KeyCode == Keys.Delete )
				this.deleteFeedMenuItem_Click( sender, e );
		}

		#endregion
	}
}