An Image Viewer with Lossless Rotation, EXIF and Other Goodies

using System;
using System.Drawing;
using System.Collections;
using System.Windows.Forms;
using System.IO;
using System.Management;
using System.Globalization;
using System.DirectoryServices;
using System.Configuration;
using System.Collections.Specialized;

using TowerSoftware.IO;
using TowerSoftware.LinkedListCode;
using TowerSoftware.ImageFunctionSoftware;

public class Explorer : System.Windows.Forms.Form
{
	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.TreeView tvFolders;
	private System.Windows.Forms.ImageList m_imageListTreeView;
	private System.Windows.Forms.PictureBox sizablePicture;
	private System.Windows.Forms.MenuItem menuItemRotate;
	private System.ComponentModel.IContainer components;

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

		// Populate TreeView with Drive list
		PopulateDriveList();
	}

	/// <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(Explorer));
		this.tvFolders = new System.Windows.Forms.TreeView();
		this.m_imageListTreeView = new System.Windows.Forms.ImageList(this.components);
		this.splitter1 = new System.Windows.Forms.Splitter();
		this.mainMenu1 = new System.Windows.Forms.MainMenu();
		this.menuItem1 = new System.Windows.Forms.MenuItem();
		this.menuItem2 = new System.Windows.Forms.MenuItem();
		this.menuItemRotate = new System.Windows.Forms.MenuItem();
		this.menuItem3 = new System.Windows.Forms.MenuItem();
		this.menuItem4 = new System.Windows.Forms.MenuItem();
		this.sizablePicture = new System.Windows.Forms.PictureBox();
		this.SuspendLayout();
		// 
		// tvFolders
		// 
		this.tvFolders.CheckBoxes = true;
		this.tvFolders.Dock = System.Windows.Forms.DockStyle.Left;
		this.tvFolders.ImageList = this.m_imageListTreeView;
		this.tvFolders.Name = "tvFolders";
		this.tvFolders.Size = new System.Drawing.Size(215, 535);
		this.tvFolders.TabIndex = 2;
		this.tvFolders.Move += new System.EventHandler(this.tvFolders_onMove);
		this.tvFolders.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.tvFolders_AfterSelect);
		this.tvFolders.SizeChanged += new System.EventHandler(this.tvFolders_onSizeChanged);
		// 
		// m_imageListTreeView
		// 
		this.m_imageListTreeView.ColorDepth = System.Windows.Forms.ColorDepth.Depth8Bit;
		this.m_imageListTreeView.ImageSize = new System.Drawing.Size(16, 16);
		this.m_imageListTreeView.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("m_imageListTreeView.ImageStream")));
		this.m_imageListTreeView.TransparentColor = System.Drawing.Color.Transparent;
		// 
		// splitter1
		// 
		this.splitter1.Location = new System.Drawing.Point(215, 0);
		this.splitter1.Name = "splitter1";
		this.splitter1.Size = new System.Drawing.Size(4, 535);
		this.splitter1.TabIndex = 3;
		this.splitter1.TabStop = false;
		// 
		// mainMenu1
		// 
		this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																				  this.menuItem1,
																				  this.menuItem3});
		// 
		// menuItem1
		// 
		this.menuItem1.Index = 0;
		this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																				  this.menuItem2,
																				  this.menuItemRotate});
		this.menuItem1.Text = "&File";
		// 
		// menuItem2
		// 
		this.menuItem2.Index = 0;
		this.menuItem2.Text = "&Close";
		this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
		// 
		// menuItemRotate
		// 
		this.menuItemRotate.Index = 1;
		this.menuItemRotate.Text = "Rotate";
		this.menuItemRotate.Click += new System.EventHandler(this.menuItemRotate_Click);
		// 
		// menuItem3
		// 
		this.menuItem3.Index = 1;
		this.menuItem3.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
																				  this.menuItem4});
		this.menuItem3.Text = "&Help";
		// 
		// menuItem4
		// 
		this.menuItem4.Index = 0;
		this.menuItem4.Text = "&About";
		// 
		// sizablePicture
		// 
		this.sizablePicture.Location = new System.Drawing.Point(219, 0);
		this.sizablePicture.Name = "sizablePicture";
		this.sizablePicture.Size = new System.Drawing.Size(405, 535);
		this.sizablePicture.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;
		this.sizablePicture.TabIndex = 4;
		this.sizablePicture.TabStop = false;
		this.sizablePicture.Click += new System.EventHandler(this.pictureBox1_Click);
		// 
		// Explorer
		// 
		this.AutoScaleBaseSize = new System.Drawing.Size(6, 15);
		this.ClientSize = new System.Drawing.Size(624, 535);
		this.Controls.AddRange(new System.Windows.Forms.Control[] {
																	  this.sizablePicture,
																	  this.splitter1,
																	  this.tvFolders});
		this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
		this.Menu = this.mainMenu1;
		this.Name = "Explorer";
		this.Text = "My Window Explorer";
		this.ResumeLayout(false);

	}
		#endregion

	/// <summary>
	/// The main entry point for the application.
	/// </summary>
	[STAThread]
	static void xxxxxMain() 
	{
		Application.Run(new Explorer());
	}

	enum IconType
	{
		myComputer = 0,
		Removable = 2,
		LocalDisk = 3,
		Network = 4,
		CD = 5,
		//const int RAMDrive = 6;
		FILES = 11
	};
	//This procedure populate the TreeView with the Drive list
	private void PopulateDriveList()
	{
		TreeNode nodeTreeNode;
		IconType imageIndex;
		IconType selectIndex;


		this.Cursor = Cursors.WaitCursor;
		//clear TreeView
		tvFolders.Nodes.Clear();
		nodeTreeNode = new TreeNode("My Computer", (int)IconType.myComputer, (int)IconType.myComputer);
		tvFolders.Nodes.Add(nodeTreeNode);

		//set node collection
		TreeNodeCollection nodeCollection = nodeTreeNode.Nodes;

		//Get Drive list
		ManagementObjectCollection queryCollection = GetDrives();
		foreach ( ManagementObject mo in queryCollection)
		{
			
			switch (int.Parse( mo["DriveType"].ToString()))
			{
				case (int)IconType.Removable:			//removable drives
					selectIndex = imageIndex = IconType.Removable;
					break;
				case (int)IconType.CD:				//CD rom drives
					selectIndex = imageIndex = IconType.CD;
					continue;
				case (int)IconType.Network:			//Network drives
					selectIndex = imageIndex = IconType.Network;
					break;
				case (int)IconType.LocalDisk:			//Local drives
					selectIndex = imageIndex = IconType.LocalDisk;
					break;
				default:				//default to folder
					selectIndex = imageIndex = IconType.LocalDisk;
					break;
			}
			//create new drive node
			nodeTreeNode = new TreeNode(mo["Name"].ToString() + "\\" , (int)imageIndex, (int)selectIndex);

			//add new node
			nodeCollection.Add(nodeTreeNode);

		}


		//Init files ListView
		InitListView();

		this.Cursor = Cursors.Default;

	}
		

	private void tvFolders_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
	{
		//Populate folders and files when a folder is selected
		this.Cursor = Cursors.WaitCursor;

		//get current selected drive or folder
		TreeNode nodeCurrent = e.Node;

		//clear all sub-folders
		nodeCurrent.Nodes.Clear();

		if (nodeCurrent.SelectedImageIndex == (int)IconType.myComputer) 
		{
			//Selected My Computer - repopulate drive list
			PopulateDriveList();
		}
		else 
		{
			//populate sub-folders and folder files
			PopulateDirectory(nodeCurrent, nodeCurrent.Nodes);
		}
		this.Cursor = Cursors.Default;
	}
		
	protected void InitListView()
	{
		//init ListView control
		//lvFiles.Clear();		//clear control
		//create column header for ListView
		//lvFiles.Columns.Add("Name",150,System.Windows.Forms.HorizontalAlignment.Left);
		//lvFiles.Columns.Add("Size",75, System.Windows.Forms.HorizontalAlignment.Right);
		//lvFiles.Columns.Add("Created", 140, System.Windows.Forms.HorizontalAlignment.Left);
		//lvFiles.Columns.Add("Modified", 140, System.Windows.Forms.HorizontalAlignment.Left);

	}

		
	public bool OLDshowPicha(TreeNode nodeCurrent)
	{
		//MessageBox.Show("Directory or path " + nodeCurrent.ToString() + " does not exist.");
		string fn = GetFullPath(nodeCurrent.FullPath);
		Image fullSizeImg = System.Drawing.Image.FromFile(fn);
		int xi = fullSizeImg.Width;
		int yi = fullSizeImg.Height; 

		double aspectRatio = xi / (double)yi;
		bool crappyThumbNailDoesntalwaysWork = false;
		if ( crappyThumbNailDoesntalwaysWork )
		{
			int xp = sizablePicture.Size.Width;
			int yp = sizablePicture.Size.Height;
			int newImageWidth = xp;
			int newImageHeight = yp;
			if ( (double)xp/yp > aspectRatio)
			{
				newImageWidth = (int)(yp * aspectRatio);
			}
			else
			{
				newImageHeight = (int)(xp / aspectRatio);
			}
			//Image fullSizeImg = Image.FromFile(Server.MapPath(imageUrl));
			Image.GetThumbnailImageAbort dummyCallBack	= new Image.GetThumbnailImageAbort(ThumbnailCallback);
			Image thumbNailImg 	= fullSizeImg.GetThumbnailImage(newImageWidth, newImageHeight, 
				dummyCallBack, IntPtr.Zero);
			sizablePicture.Image = thumbNailImg; 
		}
		else
		{
			// Try to resize the picture box
			int xp = this.Width - tvFolders.Width;
			int yp = this.Height;
			int newpictureBoxWidth = xp;
			int newpictureBoxHeight = yp;
			if ( (double)xp/yp > aspectRatio)
			{
				newpictureBoxWidth = (int)(yp * aspectRatio);
			}
			else
			{
				newpictureBoxHeight = (int)(xp / aspectRatio);
			}
			sizablePicture.Width = newpictureBoxWidth;
			sizablePicture.Height = newpictureBoxHeight;
			sizablePicture.Image = Image.FromFile(fn);
		}
		return true;
	}

	//this function is reqd for thumbnail creation
	public bool ThumbnailCallback()
	{
		return false;
	}
	protected void PopulateDirectory(TreeNode nodeCurrent, TreeNodeCollection nodeCurrentCollection)
	{
		TreeNode nodeDir;

		if ( nodeCurrent.SelectedImageIndex != 1) 
		{
			//populate treeview with folders
			try
			{
				//check path
				if ( Directory.Exists(GetFullPath(nodeCurrent.FullPath)) == false)
				{
					Size theSize = new Size(this.Width - tvFolders.Width, this.Height);
					ImageFunctions.ShowPicture(sizablePicture, theSize, GetFullPath(nodeCurrent.FullPath));
				}
				else
				{
					//populate files
					PopulateFiles(nodeCurrent, nodeCurrentCollection);

					string[] stringDirectories = Directory.GetDirectories(GetFullPath(nodeCurrent.FullPath));
					string stringFullPath = "";
					string stringPathName = "";

					//loop throught all directories
					foreach (string stringDir in stringDirectories)
					{
						stringFullPath = stringDir;
						stringPathName = GetPathName(stringFullPath);
							
						//create node for directories
						nodeDir = new TreeNode(stringPathName.ToString(), (int)IconType.LocalDisk, (int)IconType.LocalDisk);
						nodeCurrentCollection.Add(nodeDir);
					}
				}
			}
			catch (IOException )
			{
				MessageBox.Show("Error: Drive not ready or directory does not exist.");
			}
			catch (UnauthorizedAccessException )
			{
				MessageBox.Show("Error: Drive or directory access denided.");
			}
			catch (Exception e)
			{
				MessageBox.Show("Error: " + e);
			}
		}
	}

	protected string GetPathName(string stringPath)
	{
		//Get Name of folder
		string[] stringSplit = stringPath.Split('\\');
		int _maxIndex = stringSplit.Length;
		return stringSplit[_maxIndex-1];
	}

	protected void PopulateFiles(TreeNode nodeCurrent, TreeNodeCollection nodeCollection)
	{
			
		//Populate listview with files
		string[] lvData =  new string[4];
			
		//clear list
		InitListView();

		if (nodeCurrent.SelectedImageIndex != (int)IconType.myComputer) 
		{
			//check path
			if(Directory.Exists((string) GetFullPath(nodeCurrent.FullPath)) == false)
			{
				MessageBox.Show("Directory or path " + nodeCurrent.ToString() + " does not exist.");
			}
			else
			{
				try
				{
					string[] stringFiles = Directory.GetFiles(GetFullPath(nodeCurrent.FullPath), "*.jpg");
					string stringFileName = "";
					DateTime dtCreateDate, dtModifyDate;
					Int64 lFileSize = 0;

					//loop throught all files
					foreach (string stringFile in stringFiles)
					{
						stringFileName = stringFile;
						string stringPathName = GetPathName(stringFileName);
						TreeNode nodeTreeNode = new TreeNode(stringPathName, (int)IconType.FILES, (int)IconType.FILES);
						nodeCollection.Add(nodeTreeNode);
					}

					// loop throught all files
					foreach (string stringFile in stringFiles)
					{
						stringFileName = stringFile;
						FileInfo objFileSize = new FileInfo(stringFileName);
						lFileSize = objFileSize.Length;
						dtCreateDate = objFileSize.CreationTime; //GetCreationTime(stringFileName);
						dtModifyDate = objFileSize.LastWriteTime; //GetLastWriteTime(stringFileName);

						//create listview data
						lvData[0] = GetPathName(stringFileName);
						lvData[1] = formatSize(lFileSize);
							
						//check if file is in local current day light saving time
						if (TimeZone.CurrentTimeZone.IsDaylightSavingTime(dtCreateDate) == false)
						{
							//not in day light saving time adjust time
							lvData[2] = FormatDate(dtCreateDate.AddHours(1));
						}
						else
						{
							//is in day light saving time adjust time
							lvData[2] = FormatDate(dtCreateDate);
						}

						//check if file is in local current day light saving time
						if (TimeZone.CurrentTimeZone.IsDaylightSavingTime(dtModifyDate) == false)
						{
							//not in day light saving time adjust time
							lvData[3] = FormatDate(dtModifyDate.AddHours(1));
						}
						else							
						{
							//not in day light saving time adjust time
							lvData[3] = FormatDate(dtModifyDate);
						}


					}
				}
				catch (IOException )
				{
					MessageBox.Show("Error: Drive not ready or directory does not exist.");
				}
				catch (UnauthorizedAccessException )
				{
					MessageBox.Show("Error: Drive or directory access denied.");
				}
				catch (Exception e)
				{
					MessageBox.Show("Error: " + e);
				}
			}
		}
	}

	protected string GetFullPath(string stringPath)
	{
		//Get Full path
		string stringParse = "";
		//remove My Computer from path.
		stringParse = stringPath.Replace("My Computer\\", "");

		return stringParse;
	}
		
	protected ManagementObjectCollection GetDrives()
	{
		//get drive collection
		ManagementObjectSearcher query = new ManagementObjectSearcher("SELECT * From Win32_LogicalDisk ");
		ManagementObjectCollection queryCollection = query.Get();
			
		return queryCollection;
	}

	protected string FormatDate(DateTime dtDate)
	{
		//Get date and time in short format
		string stringDate = "";

		stringDate = dtDate.ToShortDateString().ToString() + " " + dtDate.ToShortTimeString().ToString();

		return stringDate;
	}

	protected string formatSize(Int64 lSize)
	{
		//Format number to KB
		string stringSize = "";
		NumberFormatInfo myNfi = new NumberFormatInfo();

		Int64 lKBSize = 0;

		if (lSize < 1024 ) 
		{
			if (lSize == 0) 
			{
				//zero byte
				stringSize = "0";
			}
			else 
			{
				//less than 1K but not zero byte
				stringSize = "1";
			}
		}
		else 
		{
			//convert to KB
			lKBSize = lSize / 1024;
			//format number with default format
			stringSize = lKBSize.ToString("n",myNfi);
			//remove decimal
			stringSize = stringSize.Replace(".00", "");
		}

		return stringSize + " KB";

	}

	private void menuItem2_Click(object sender, System.EventArgs e)
	{
		//quit application
		this.Close();
	}

	private void pictureBox1_Click(object sender, System.EventArgs e)
	{
	}

	private void recursivelyRotate(TreeNodeCollection nodes)
	{			
		foreach(TreeNode node in nodes)
		{
			if (node.GetNodeCount(false) == 0)
			{
				if ( node.Checked)
				{
					string fname = GetFullPath(node.FullPath);
					ImageFunctions.Rotate90(fname);
				}
			}
			else
			{
				recursivelyRotate(node.Nodes);
			}
				
		}
	}

	private void menuItemRotate_Click(object sender, System.EventArgs e)
	{		
		sizablePicture.Image = null;
		sizablePicture.Invalidate();
		recursivelyRotate(tvFolders.Nodes);
		sizablePicture.Image = System.Drawing.Image.FromFile(GetFullPath(tvFolders.SelectedNode.FullPath));
	}

	private void tvFolders_onMove(object sender, System.EventArgs e)
	{
		//tvFolders.SelectedNode = tvFolders.SelectedNode;
		if ( tvFolders.SelectedNode != null )
		{
			if (tvFolders.SelectedNode.SelectedImageIndex > 10 ) 
			{
				//System.Windows.Forms.TreeViewEventArgs tve = new System.Windows.Forms.TreeViewEventArgs(tvFolders.SelectedNode);
				//tvFolders_AfterSelect(null, tve);
			}
		}
	}

	private void tvFolders_onSizeChanged(object sender, System.EventArgs e)
	{
		//tvFolders.SelectedNode = tvFolders.SelectedNode;
		if ( tvFolders.SelectedNode != null )
		{
			if ( tvFolders.SelectedNode.SelectedImageIndex == (int)IconType.FILES ) 
			{
				//System.Windows.Forms.TreeViewEventArgs tve = new System.Windows.Forms.TreeViewEventArgs(tvFolders.SelectedNode);
				//tvFolders_AfterSelect(null, tve);
				sizablePicture.Left = tvFolders.Width+2;
				Size theSize = new Size(this.Width - sizablePicture.Left, this.Height);
				ImageFunctions.ShowPicture(sizablePicture,  theSize, GetFullPath(tvFolders.SelectedNode.FullPath));
			}
		}
	}
}