using System;
using System.Drawing;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Xml;
using System.Xml.XPath;

namespace eBay_Images {
	/// <summary>
	/// Summary description for ImageResize.
	/// </summary>
	public class ImageResize : System.Windows.Forms.Form {
		private System.Windows.Forms.Button LoadImage;
		private System.Windows.Forms.OpenFileDialog openFileDialog1;
		private System.Windows.Forms.PictureBox PictureBox1;
		private System.Windows.Forms.HScrollBar CropX;
		private System.Windows.Forms.VScrollBar CropY;
		private System.Windows.Forms.VScrollBar CropHeight;
		private System.Windows.Forms.HScrollBar CropWidth;
		private System.Windows.Forms.Button UploadImage;
		private System.Windows.Forms.ListBox ListImages;
		private System.Windows.Forms.Label ListImagesLabel;
		private System.Windows.Forms.Button GenerateHTML;
		private System.Windows.Forms.Button ClearImages;
		private System.Windows.Forms.ToolTip ImageToolTip;
		private System.ComponentModel.IContainer components;

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

		/// <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.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(ImageResize));
			this.LoadImage = new System.Windows.Forms.Button();
			this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
			this.PictureBox1 = new System.Windows.Forms.PictureBox();
			this.CropY = new System.Windows.Forms.VScrollBar();
			this.CropHeight = new System.Windows.Forms.VScrollBar();
			this.CropWidth = new System.Windows.Forms.HScrollBar();
			this.CropX = new System.Windows.Forms.HScrollBar();
			this.UploadImage = new System.Windows.Forms.Button();
			this.ListImages = new System.Windows.Forms.ListBox();
			this.ListImagesLabel = new System.Windows.Forms.Label();
			this.GenerateHTML = new System.Windows.Forms.Button();
			this.ClearImages = new System.Windows.Forms.Button();
			this.ImageToolTip = new System.Windows.Forms.ToolTip(this.components);
			//((System.ComponentModel.ISupportInitialize)(this.PictureBox1)).BeginInit();
			this.SuspendLayout();
			// 
			// LoadImage
			// 
			this.LoadImage.Location = new System.Drawing.Point(88, 192);
			this.LoadImage.Name = "LoadImage";
			this.LoadImage.Size = new System.Drawing.Size(104, 23);
			this.LoadImage.TabIndex = 0;
			this.LoadImage.TabStop = false;
			this.LoadImage.Text = "Load Image...";
			this.LoadImage.Click += new System.EventHandler(this.LoadImage_Click);
			// 
			// openFileDialog1
			// 
			this.openFileDialog1.DefaultExt = "jpg";
			this.openFileDialog1.Filter = "JPEG Images|*.jpg";
			this.openFileDialog1.Title = "Choose an Image...";
			// 
			// PictureBox1
			// 
			this.PictureBox1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.PictureBox1.Location = new System.Drawing.Point(32, 24);
			this.PictureBox1.Name = "PictureBox1";
			this.PictureBox1.Size = new System.Drawing.Size(208, 144);
			this.PictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.CenterImage;
			this.PictureBox1.TabIndex = 2;
			this.PictureBox1.TabStop = false;
			// 
			// CropY
			// 
			this.CropY.LargeChange = 1;
			this.CropY.Location = new System.Drawing.Point(16, 24);
			this.CropY.Name = "CropY";
			this.CropY.Size = new System.Drawing.Size(16, 144);
			this.CropY.TabIndex = 1;
			this.CropY.Scroll += new System.Windows.Forms.ScrollEventHandler(this.CropY_Scroll);
			// 
			// CropHeight
			// 
			this.CropHeight.LargeChange = 1;
			this.CropHeight.Location = new System.Drawing.Point(240, 24);
			this.CropHeight.Name = "CropHeight";
			this.CropHeight.Size = new System.Drawing.Size(16, 144);
			this.CropHeight.TabIndex = 3;
			this.CropHeight.Scroll += new System.Windows.Forms.ScrollEventHandler(this.CropHeight_Scroll);
			// 
			// CropWidth
			// 
			this.CropWidth.LargeChange = 1;
			this.CropWidth.Location = new System.Drawing.Point(32, 168);
			this.CropWidth.Name = "CropWidth";
			this.CropWidth.Size = new System.Drawing.Size(208, 16);
			this.CropWidth.TabIndex = 4;
			this.CropWidth.Scroll += new System.Windows.Forms.ScrollEventHandler(this.CropWidth_Scroll);
			// 
			// CropX
			// 
			this.CropX.LargeChange = 1;
			this.CropX.Location = new System.Drawing.Point(32, 7);
			this.CropX.Name = "CropX";
			this.CropX.Size = new System.Drawing.Size(208, 16);
			this.CropX.TabIndex = 2;
			this.CropX.Scroll += new System.Windows.Forms.ScrollEventHandler(this.CropX_Scroll);
			// 
			// UploadImage
			// 
			this.UploadImage.Location = new System.Drawing.Point(88, 232);
			this.UploadImage.Name = "UploadImage";
			this.UploadImage.Size = new System.Drawing.Size(104, 23);
			this.UploadImage.TabIndex = 5;
			this.UploadImage.TabStop = false;
			this.UploadImage.Text = "Upload Image";
			this.UploadImage.Click += new System.EventHandler(this.UploadImage_Click);
			// 
			// ListImages
			// 
			this.ListImages.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
			this.ListImages.Location = new System.Drawing.Point(288, 24);
			this.ListImages.Name = "ListImages";
			this.ListImages.ScrollAlwaysVisible = true;
			this.ListImages.Size = new System.Drawing.Size(184, 145);
			this.ListImages.TabIndex = 6;
			this.ListImages.TabStop = false;
			this.ListImages.DoubleClick += new System.EventHandler(this.ListImages_DoubleClick);
			// 
			// ListImagesLabel
			// 
			this.ListImagesLabel.AutoSize = true;
			this.ListImagesLabel.BackColor = System.Drawing.Color.Transparent;
			this.ListImagesLabel.Location = new System.Drawing.Point(272, 8);
			this.ListImagesLabel.Name = "ListImagesLabel";
			this.ListImagesLabel.Size = new System.Drawing.Size(78, 13);
			this.ListImagesLabel.TabIndex = 7;
			this.ListImagesLabel.Text = "Images to Use:";
			// 
			// GenerateHTML
			// 
			this.GenerateHTML.Location = new System.Drawing.Point(328, 192);
			this.GenerateHTML.Name = "GenerateHTML";
			this.GenerateHTML.Size = new System.Drawing.Size(104, 23);
			this.GenerateHTML.TabIndex = 8;
			this.GenerateHTML.TabStop = false;
			this.GenerateHTML.Text = "Copy Image Code";
			this.GenerateHTML.Click += new System.EventHandler(this.GenerateHTML_Click);
			// 
			// ClearImages
			// 
			this.ClearImages.Location = new System.Drawing.Point(328, 232);
			this.ClearImages.Name = "ClearImages";
			this.ClearImages.Size = new System.Drawing.Size(104, 23);
			this.ClearImages.TabIndex = 9;
			this.ClearImages.TabStop = false;
			this.ClearImages.Text = "Clear Image List";
			this.ClearImages.Click += new System.EventHandler(this.ClearImages_Click);
			// 
			// ImageToolTip
			// 
			this.ImageToolTip.AutomaticDelay = 250;
			this.ImageToolTip.AutoPopDelay = 0;
			this.ImageToolTip.InitialDelay = 250;
			this.ImageToolTip.ReshowDelay = 10;
			// 
			// ImageResize
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(474, 255);
			this.Controls.Add(this.ListImages);
			this.Controls.Add(this.ClearImages);
			this.Controls.Add(this.GenerateHTML);
			this.Controls.Add(this.UploadImage);
			this.Controls.Add(this.CropWidth);
			this.Controls.Add(this.CropX);
			this.Controls.Add(this.CropHeight);
			this.Controls.Add(this.CropY);
			this.Controls.Add(this.PictureBox1);
			this.Controls.Add(this.LoadImage);
			this.Controls.Add(this.ListImagesLabel);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.MaximizeBox = false;
			this.Name = "ImageResize";
			this.Text = "eBay Images";
			this.Load += new System.EventHandler(this.ImageResize_Load);
			//((System.ComponentModel.ISupportInitialize)(this.PictureBox1)).EndInit();
			this.ResumeLayout(false);
			this.PerformLayout();

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() {
			// HACK: MSBee/Build for 1.1 Framework: msbuild.exe /t:Rebuild /p:TargetFX1_1=true

			// fix non-compliant webservers
			ServicePointManager.Expect100Continue = false;
			Application.Run(new ImageResize());
		}

		#region Global Variables

		// store the current image we're working on
		Image OriginalImage, PreviewImage;

		// and a global for the scaling factor
		double ScaleFactor = 1;

		// and the 'crop' rectangle - global for use in CreateCropBox
		Rectangle CropRect = new Rectangle();

		// an arraylist to hold the thumbnail html
		ArrayList ThumbnailHTML = new ArrayList();

		#endregion


		#region ImageResize_Load

		/// <summary>
		/// Form_Load Event, initialize stuff programatically
		/// </summary>
		private void ImageResize_Load(object sender, System.EventArgs e) {
			if (OriginalImage != null) OriginalImage.Dispose();
			if (PreviewImage != null) PreviewImage.Dispose();

			PictureBox1.Image = null;

			// TODO: see if any of this can be moved to FixGui() to simplify initialization

			this.CropX.Minimum = 0;
			this.CropX.Maximum = PictureBox1.Width;

			this.CropY.Minimum = 0;
			this.CropY.Maximum = PictureBox1.Height;

			this.CropWidth.Minimum = 0;
			this.CropWidth.Maximum = PictureBox1.Width;

			this.CropHeight.Minimum = 0;
			this.CropHeight.Maximum = PictureBox1.Height;

			this.CropX.Enabled = false;
			this.CropY.Enabled = false;
			this.CropWidth.Enabled = false;
			this.CropHeight.Enabled = false;

			this.UploadImage.Enabled = false;
			this.GenerateHTML.Enabled = false;
			this.ClearImages.Enabled = false;

			CropRect.X = CropX.Value;
			CropRect.Y = CropY.Value;
			CropRect.Width = CropWidth.Value;
			CropRect.Height = CropHeight.Value;
		}

		#endregion


		#region ScrollBar Events

		// idiosyncracy with scrollbars:
		//   the actual maximum scrollable value is ScrollBar.Maximum - ScrollBar.LargeChange + 1
		//   therefore, we set ScrollBar.LargeChange = 1
		private void CropX_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
			CropRect.X = e.NewValue;

			CreateCropBox();

			this.ImageToolTip.SetToolTip(this.PictureBox1, "Dimensions after resize and crop:  " + CalculateDimensionsAfterCropAndResize());
		}

		private void CropY_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
			CropRect.Y = e.NewValue;

			CreateCropBox();

			this.ImageToolTip.SetToolTip(this.PictureBox1, "Dimensions after resize and crop:  " + CalculateDimensionsAfterCropAndResize());
		}

		private void CropWidth_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
			CropRect.Width = e.NewValue;

			CreateCropBox();

			this.ImageToolTip.SetToolTip(this.PictureBox1, "Dimensions after resize and crop:  " + CalculateDimensionsAfterCropAndResize());
		}

		private void CropHeight_Scroll(object sender, System.Windows.Forms.ScrollEventArgs e) {
			CropRect.Height = e.NewValue;

			CreateCropBox();

			this.ImageToolTip.SetToolTip(this.PictureBox1, "Dimensions after resize and crop:  " + CalculateDimensionsAfterCropAndResize());
		}

		#endregion


		#region LoadImage_Click

		private void LoadImage_Click(object sender, System.EventArgs e) {
			if (openFileDialog1.ShowDialog() == DialogResult.OK) {
				if (OriginalImage != null) OriginalImage.Dispose();
				if (PreviewImage != null) PreviewImage.Dispose();

				if (this.PictureBox1.Image != null) PictureBox1.Image.Dispose();

				// load the desired image into temporary storage
				OriginalImage = Image.FromFile(openFileDialog1.FileName);

				// find the scaling factor for the preview image
				ScaleFactor = FindScalingFactor(OriginalImage, PictureBox1.Width, PictureBox1.Height);

				//   the receiving area for the preview version
				Rectangle dest = new Rectangle();
				dest.X = 0;
				dest.Y = 0;
				dest.Width = (int)(OriginalImage.Width * ScaleFactor);
				dest.Height = (int)(OriginalImage.Height * ScaleFactor);

				// store the resized image in the PreviewImage global
				//   for use by CreateCropBox()
				PreviewImage = ResizeImage(OriginalImage, dest, new Rectangle(0, 0, OriginalImage.Width, OriginalImage.Height));

				// load the preview image into the picture box
				this.PictureBox1.Image = PreviewImage;

				// TODO: clean this up into FixGui()?
				// enable the scrollbars
				this.CropX.Enabled = true;
				this.CropY.Enabled = true;
				this.CropWidth.Enabled = true;
				this.CropHeight.Enabled = true;

				// manually do what the scroll events would do -- select the whole image initially
				CropRect.X = this.CropX.Value = this.CropX.Minimum;
				CropRect.Y = this.CropY.Value = this.CropY.Minimum;
				CropRect.Width = this.CropWidth.Value = this.CropWidth.Maximum;
				CropRect.Height = this.CropHeight.Value = this.CropHeight.Maximum;

				CreateCropBox();

				this.ImageToolTip.SetToolTip(this.PictureBox1, "Dimensions after resize and crop:  " + CalculateDimensionsAfterCropAndResize());

				FixGui();
			}
		}

		#endregion

		#region UploadImage_Click

		private void UploadImage_Click(object sender, System.EventArgs e) {
			WaitingGui();

			Rectangle cropped = new Rectangle(CropRect.X, CropRect.Y, CropRect.Width, CropRect.Height);

			// normalize the cropbox to the original image pixels
			NormalizeCropCoords(ref cropped);

			// generate the cropped image
			Image CroppedImage = ResizeImage(OriginalImage, new Rectangle(0, 0, cropped.Width, cropped.Height), cropped);

			if (cropped.Width > 550) {
				double reScaleFactor = 550 / (double)cropped.Width;
				// we can reuse this ...
				cropped.X = 0;
				cropped.Y = 0;
				cropped.Width = (int)(cropped.Width * reScaleFactor);
				cropped.Height = (int)(cropped.Height * reScaleFactor);

				CroppedImage = ResizeImage(CroppedImage, cropped, new Rectangle(0, 0, CroppedImage.Width, CroppedImage.Height));
			}

			// all we care about for final size constraints is the width, and that the image
			//   itself is bigger than 200x200
			if (CroppedImage.Width > 200 && CroppedImage.Height > 200) {
				// big try loop in case the http transaction fails

				string XMLResponse = String.Empty;

				try {
					// make the image a memory stream to convert to a byte array
					MemoryStream msCroppedImage = new MemoryStream();

					// put the image into the stream
					CroppedImage.Save(msCroppedImage, System.Drawing.Imaging.ImageFormat.Jpeg);

					// byte array for the stream
					byte[] CroppedImageJPEG = new byte[msCroppedImage.Length];

					// make sure the stream starts at the beginning
					msCroppedImage.Position = 0;

					// finally copy the stream into the byte array
					msCroppedImage.Read(CroppedImageJPEG, 0, (int)msCroppedImage.Length);

					// build form values here (pull out of HttpFileUpload, NameValueCollection)

					// do the upload
					UploadSpec FileUpload = new UploadSpec(CroppedImageJPEG, openFileDialog1.FileName, "fileupload");
					StringDictionary OtherFields = new StringDictionary();
					OtherFields.Add("xml", "yes");
					OtherFields.Add("rembar", "1");
					HttpWebResponse reply = HttpUpload.Upload(
						new Uri("http://www.imageshack.us/index.php"),
						OtherFields,
						null,
						null,
						FileUpload);

					StreamReader srReply = new StreamReader(reply.GetResponseStream());

					// and save the response
					XMLResponse = srReply.ReadToEnd();

					// setup the lists with:
					ThumbnailHTML.Add(GetThumbnailLink(XMLResponse));
					ListImages.Items.Add(openFileDialog1.FileName.Substring(openFileDialog1.FileName.LastIndexOf(@"\") + 1));

					// since we worked, lets clean up stuff
					this.PictureBox1.Image = null;

					// test the error logging
					//throw new ApplicationException();
				} catch (Exception ex) {
					Boolean Logged = false;

					try {
						DateTime ErrorTime = DateTime.Now;
						FileInfo exe = new FileInfo(Application.ExecutablePath);
						DirectoryInfo AppPath = exe.Directory;

						FileStream LogFile = new FileStream(String.Format(@"{0}\error_{1:yyyyMMdd-HHmmss}.txt", AppPath.FullName, ErrorTime), FileMode.Create, FileAccess.Write, FileShare.Read);
						StreamWriter LogWriter = new StreamWriter(LogFile);

						LogWriter.WriteLine(ErrorTime.ToString("MM/dd/yyyy HH:mm:ss"));
						LogWriter.WriteLine(Environment.NewLine);
						LogWriter.WriteLine("Exception:");
						LogWriter.WriteLine(ex.ToString());
						LogWriter.WriteLine(Environment.NewLine);
						LogWriter.WriteLine(XMLResponse);

						LogWriter.Flush();
						LogWriter.Close();

						Logged = true;
					} catch {
						Logged = false;
					}

					MessageBox.Show(String.Format("{0}Error:{1}{2}", (Logged ? "Logged " : String.Empty), Environment.NewLine, ex.ToString()), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
				}
			} else {
				MessageBox.Show("The cropped area is too small to generate a thumbnail!\n\nIt is currently " + CalculateDimensionsAfterCropAndResize() + ", but needs to be at greater than 200x200!", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}

			FixGui();
		}

		#endregion

		#region GenerateHTML_Click

		private void GenerateHTML_Click(object sender, System.EventArgs e) {
			// TODO: this should probably get rewritten to be cleaner, but it gets the job done for now
			StringBuilder result = new StringBuilder();

			int i = ThumbnailHTML.Count, j = 0;

			if (i > 0) {
				result.Append("<table cellpadding=\"2\" cellspacing=\"7\" border=\"0\">\r\n");

				if (i % 2 == 1) {
					result.Append("\t<tr>\r\n");
					result.Append("\t\t<td style=\"border: 1px solid black;\" valign=\"center\" align=\"middle\" colspan=\"2\">\r\n");
					result.Append("\t\t\t" + ThumbnailHTML[j] + "\r\n"); //line
					result.Append("\t\t</td>\r\n");
					result.Append("\t</tr>\r\n");

					j++;
				}

				// TODO: figure out the case to add the 'tr' (modulus) and make less-icky
				while (j < i) {
					result.Append("\t<tr>\r\n");
					result.Append("\t\t<td style=\"border: 1px solid black;\" valign=\"center\" align=\"middle\">\r\n");
					result.Append("\t\t\t" + ThumbnailHTML[j] + "\r\n");  //line
					result.Append("\t\t</td>\r\n");

					j++;

					result.Append("\t\t<td style=\"border: 1px solid black;\" valign=\"center\" align=\"middle\">\r\n");
					result.Append("\t\t\t" + ThumbnailHTML[j] + "\r\n");  //line
					result.Append("\t\t</td>\r\n");
					result.Append("\t</tr>\r\n");

					j++;
				}

				result.Append("</table>\r\n");

				Clipboard.SetDataObject(result.ToString(), true);
				MessageBox.Show("The thumbnail HTML has been copied to the clipboard.", "HTML Copied", MessageBoxButtons.OK, MessageBoxIcon.Information);
			} else {
				MessageBox.Show("You must add some images!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
			}
		}

		#endregion

		#region ClearImages_Click

		private void ClearImages_Click(object sender, System.EventArgs e) {
			ThumbnailHTML.Clear();
			this.ListImages.Items.Clear();
			this.ListImagesLabel.Text = "Images to Use:";

			FixGui();
		}

		#endregion

		#region ListImages_DoubleClick

		private void ListImages_DoubleClick(object sender, EventArgs e) {
			// this function allows a double-click of the list to return the link to just that file
			if (ListImages.SelectedIndex > -1) {
				//line = Regex.Replace(line, ".*value=\"(.*)\".*", "$1");
				string URL = Regex.Replace(ThumbnailHTML[ListImages.SelectedIndex].ToString(), ".*<a.*href=\"(.*)\" target.*</a>.*", "$1");

				if (URL.Length > 0) {
					Clipboard.SetDataObject(URL, true);
					MessageBox.Show("Copied URL for " + ListImages.SelectedItem.ToString() + " to the clipboard", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Information);
				} else {
					MessageBox.Show("Error parsing ThumbnailHTML", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
				}
			}
		}

		#endregion


		#region Helper Functions

		#region ResizeImage

		/// <summary>
		/// Resize an Image given a Rectangle to fit it into.
		/// </summary>
		/// <param name="ImageToResize">The Image to Resize</param>
		/// <param name="NewArea">The Rectangle area to fit it into.</param>
		/// <returns>A MemoryStream with the resized image.</returns>
		//private MemoryStream ResizeImage(Image ImageToResize, Rectangle Portion, int NewWidth, int NewHeight) {
		private Image ResizeImage(Image ImageToResize, Rectangle NewSize, Rectangle SourceArea) {
			// the image to return
			Image retval;

			// the stream that will contain the image returned to the caller
			MemoryStream ms = new MemoryStream();

			// build the container for the resized image
			Bitmap bmp = new Bitmap(NewSize.Width, NewSize.Height);
			Graphics g = Graphics.FromImage(bmp);

			// perform a high quality bicubic resize
			g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
			g.DrawImage(ImageToResize, NewSize, SourceArea, GraphicsUnit.Pixel);

			// copy the image to the stream
			bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);

			// and build the returned image from the stream
			retval = Image.FromStream(ms);

			// cleanup
			bmp.Dispose();
			g.Dispose();

			return retval;
		}

		#endregion

		#region CreateCropBox

		/// <summary>
		/// Draws the Cropping Box on the PreviewImage (non-destructively) and places that new Image in the PictureBox.
		/// </summary>
		private void CreateCropBox() {
			// temp image to have cropbox overlain
			Image WithCropBox = (Image)PreviewImage.Clone();

			// bind g to that temp image
			Graphics g = Graphics.FromImage(WithCropBox);

			// add the cropping rectangle
			g.DrawRectangle(new Pen(Brushes.Azure, 2), CropRect);

			// cleanup
			g.Dispose();

			// and output it to the picture box
			PictureBox1.Image = WithCropBox;
		}

		#endregion

		#region FindScalingFactor

		/// <summary>
		/// Calculate the scaling factor to reduce an image by to fit it into a MaxWidth x MaxHeight area.
		/// </summary>
		/// <param name="OriginalImage">The image to scale to fit in a MaxWidth x MaxHeight area.</param>
		/// <param name="MaxWidth">Maximum width of the area to contain OriginalImage.</param>
		/// <param name="MaxHeight">Maximum height of the area to contain OriginalImage.</param>
		/// <returns>The scaling factor of OriginalImage to make it fit within a MaxWidth x MaxHeight area, or 1 if it will fit.</returns>
		double FindScalingFactor(Image OriginalImage, int MaxWidth, int MaxHeight) {
			double scaleFactorWidth = 1, scaleFactorHeight = 1;

			if (OriginalImage.Width > MaxWidth) {
				scaleFactorWidth = (double)MaxWidth / (double)OriginalImage.Width;
			}

			if (OriginalImage.Height > MaxHeight) {
				scaleFactorHeight = (double)MaxHeight / (double)OriginalImage.Height;
			}

			// return the scale factor that will scale the image the most
			return Math.Min(scaleFactorWidth, scaleFactorHeight);
		}

		#endregion

		#region NormalizeCropCoords

		private void NormalizeCropCoords(ref Rectangle coords) {
			// normalize the cropped box to the actual image
			double unScaleFactor = 1 / ScaleFactor;
			coords.X = (int)(coords.X * unScaleFactor);
			coords.Y = (int)(coords.Y * unScaleFactor);
			coords.Width = (int)(coords.Width * unScaleFactor);
			coords.Height = (int)(coords.Height * unScaleFactor);

			// crop only parts of the image -- not beyond
			//   -- do after the normalize to make sure if the whole image is desired we comply
			if (coords.X + coords.Width > OriginalImage.Width) {
				coords.Width = OriginalImage.Width - coords.X;
			}

			if (coords.Y + coords.Height > OriginalImage.Height) {
				coords.Height = OriginalImage.Height - coords.Y;
			}
		}

		#endregion

		#region CalculateDimensionsAfterCropAndResize

		private string CalculateDimensionsAfterCropAndResize() {
			Rectangle cropped = new Rectangle(CropRect.X, CropRect.Y, CropRect.Width, CropRect.Height);

			NormalizeCropCoords(ref cropped);

			if (cropped.Width > 550) {
				double reScaleFactor = 550 / (double)cropped.Width;
				// we can reuse this ...
				cropped.X = 0;
				cropped.Y = 0;
				cropped.Width = (int)(cropped.Width * reScaleFactor);
				cropped.Height = (int)(cropped.Height * reScaleFactor);
			}

			return String.Format("{0}x{1}", cropped.Width, cropped.Height);
		}

		#endregion

		#region GetImageLink

		/// <summary>
		/// Returns the image link, used when the list is Double-Clicked
		/// </summary>
		/// <param name="XML">XML Returned from the server</param>
		/// <returns>Image Link</returns>
		private string GetImageLink(string XML) {
			XmlDocument xmlDoc = new XmlDocument();
			xmlDoc.LoadXml(XML);

			XmlNode ImageLink = xmlDoc.SelectSingleNode("//image_link");

			if (ImageLink.Value.Length == 0)
				throw new ApplicationException("ImageLink has Zero Length");

			return ImageLink.Value;
		}

		#endregion

		#region GetThumbnailLink

		/// <summary>
		/// Returns a thumbnail link based on the XML returned by the webserver.
		/// </summary>
		/// <param name="XML">XML Returned from the server</param>
		/// <returns>Thumbnail Link</returns>
		private string GetThumbnailLink(string XML) {
			// <a href="http://img204.imageshack.us/my.php?image=blueflamez10993418492xa.jpg" target="_blank"><img src="http://img204.imageshack.us/img204/8180/blueflamez10993418492xa.th.jpg" border="0" alt="Free Image Hosting at www.ImageShack.us" /></a>

			XmlDocument xmlDoc = new XmlDocument();
			xmlDoc.LoadXml(XML);

			XmlNode ThumbnailExists = xmlDoc.SelectSingleNode("//thumb_exists");
			if (!(ThumbnailExists.InnerText == "yes"))
				throw new ApplicationException("No Thumbnail Exists");

			XmlNode ThumbnailLink = xmlDoc.SelectSingleNode("//thumb_link");
			XmlNode ImageLink = xmlDoc.SelectSingleNode("//image_link");

			if (ThumbnailLink.InnerText.Length == 0 || ImageLink.InnerText.Length == 0)
				throw new ApplicationException("ThumbnailLink or ImageLink has Zero Length");

			return string.Format("<a href=\"{0}\" target=\"_blank\"><img src=\"{1}\" border=\"0\" /></a>",
				ImageLink.InnerText,
				ThumbnailLink.InnerText);
		}

		#endregion

		#endregion

		#region GUI Management

		#region WatingGui

		private void WaitingGui() {
			this.Cursor = Cursors.WaitCursor;

			this.LoadImage.Enabled = false;
			this.UploadImage.Enabled = false;
			this.GenerateHTML.Enabled = false;
			this.ClearImages.Enabled = false;

			this.CropX.Enabled = false;
			this.CropY.Enabled = false;
			this.CropWidth.Enabled = false;
			this.CropHeight.Enabled = false;
		}

		#endregion

		#region FixGui

		private void FixGui() {
			this.LoadImage.Enabled = true;

			if (this.PictureBox1.Image != null) {
				this.UploadImage.Enabled = true;
			} else {
				this.UploadImage.Enabled = false;

				this.CropX.Value = this.CropX.Minimum;
				this.CropY.Value = this.CropY.Minimum;
				this.CropWidth.Value = this.CropWidth.Minimum;
				this.CropHeight.Value = this.CropHeight.Minimum;

				this.CropX.Enabled = false;
				this.CropY.Enabled = false;
				this.CropWidth.Enabled = false;
				this.CropHeight.Enabled = false;

				this.ImageToolTip.RemoveAll();
			}

			if (this.ThumbnailHTML.Count > 0) {
				this.GenerateHTML.Enabled = true;
				this.ClearImages.Enabled = true;

				this.ListImagesLabel.Text = String.Format("Images to Use [ {0} ] :", this.ThumbnailHTML.Count);
			} else {
				this.GenerateHTML.Enabled = false;
				this.ClearImages.Enabled = false;

				this.ListImagesLabel.Text = "Images to Use:";
			}

			this.Cursor = Cursors.Default;
		}

		#endregion

		#endregion
	}
}