Export selection to image: added progress bar and button to cancel export

Source/Plugins/BuilderModes/General/BuilderPlug.cs

@@ -890,29 +890,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			}
 
 			ImageExportSettingsForm form = new ImageExportSettingsForm();
-			if (form.ShowDialog() == DialogResult.OK)
+			form.ShowDialog();
-			{
-				ImageExportSettings settings = new ImageExportSettings(Path.GetDirectoryName(form.FilePath), Path.GetFileNameWithoutExtension(form.FilePath), Path.GetExtension(form.FilePath), form.Floor, form.Fullbright, form.Brightmap, form.Tiles, form.ImageScale, form.GetPixelFormat(), form.GetImageFormat());
-				ImageExporter exporter = new ImageExporter(sectors, settings);
-
-				string text = "The following images will be created:\n\n" + string.Join("\n", exporter.GetImageNames().ToArray());
-
-				DialogResult result = MessageBox.Show(text, "Export to image", MessageBoxButtons.OKCancel);
-
-				if (result == DialogResult.OK)
-				{
-					try
-					{
-						exporter.Export();
-
-						MessageBox.Show("Export successful.", "Export to image", MessageBoxButtons.OK, MessageBoxIcon.Information);
-					}
-					catch (ArgumentException e) // Happens if there's not enough consecutive memory to create the file
-					{
-						MessageBox.Show("Exporting failed. There's likely not enough consecutive free memory to create the image. Try a lower color depth or file format", "Export failed", MessageBoxButtons.OK, MessageBoxIcon.Error);
-					}
-				}
-			}
 		}
 
 		#endregion

Source/Plugins/BuilderModes/IO/ImageExporter.cs

@@ -27,6 +27,7 @@ using System.Drawing;
 using System.Drawing.Imaging;
 using System.Drawing.Drawing2D;
 using System.IO;
+using System.Runtime.InteropServices;
 using System.Linq;
 using System.Text;
 using CodeImp.DoomBuilder.Data;
@@ -68,12 +69,29 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 
 	#endregion
 
+	#region ================== Exceptions
+
+	[Serializable]
+	public class ImageExportCanceledException : Exception { }
+
+	[Serializable]
+	public class ImageExportImageTooBigException : Exception { }
+
+	#endregion
+
 	internal class ImageExporter
 	{
 		#region ================== Variables
 
 		private ICollection<Sector> sectors;
 		private ImageExportSettings settings;
+		private int numitems;
+		private int doneitems;
+		private int donepercent;
+		private Action addprogress;
+		private Action<string> showphase;
+		private Func<bool> checkcanelexport;
+		private bool cancelexport;
 
 		#endregion
 
@@ -85,10 +103,14 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 
 		#region ================== Constructors
 
-		public ImageExporter(ICollection<Sector> sectors, ImageExportSettings settings)
+		public ImageExporter(ICollection<Sector> sectors, ImageExportSettings settings, Action addprogress, Action<string> showphase, Func<bool> checkcanelexport)
 		{
 			this.sectors = sectors;
 			this.settings = settings;
+			this.addprogress = addprogress;
+			this.showphase = showphase;
+			this.checkcanelexport = checkcanelexport;
+			cancelexport = false;
 		}
 
 		#endregion
@@ -105,26 +127,63 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 
 			GetSizeAndOffset(out size, out offset);
 
+			// Count the number of triangles for reporting progress
+			numitems = 0;
+			doneitems = 0;
+			donepercent = 0;
+			foreach (Sector s in sectors)
+				numitems += s.Triangles.Vertices.Count / 3;
+
+			if (settings.Tiles)
+				numitems += GetNumTiles();
+
+			// If exporting a brightmap everything has to be done twice
+			if (settings.Brightmap)
+				numitems *= 2;
+
 			// Use the same image for the normal texture and the brightmap because of memory concerns
+			showphase("Preparing");
 			using (Bitmap image = new Bitmap((int)(size.x * settings.Scale), (int)(size.y * settings.Scale), settings.PixelFormat))
 			{
+				showphase("Creating normal image");
 				// Normal texture image
 				CreateImage(image, offset, settings.Scale, false);
 
 				if (settings.Tiles)
+				{
+					showphase("Saving 64x64 tile images (" + GetNumTiles() + ")");
 					SaveImageAsTiles(image);
+				}
 				else
+				{
+					showphase("Saving normal image");
+					try
+					{
 						image.Save(Path.Combine(settings.Path, settings.Name) + settings.Extension, settings.ImageFormat);
+					}
+					catch(ExternalException)
+					{
+						throw new ImageExportImageTooBigException();
+					}
+				}
 
 				// The brightmap
 				if (settings.Brightmap)
 				{
+					showphase("Creating brightmap image");
 					CreateImage(image, offset, settings.Scale, true);
 
+					showphase("Saving brightmap image");
 					if (settings.Tiles)
+					{
+						showphase("Saving 64x64 tile images (" + GetNumTiles() + ")");
 						SaveImageAsTiles(image, "_brightmap");
+					}
 					else
+					{
 						image.Save(Path.Combine(settings.Path, settings.Name) + "_brightmap" + settings.Extension, settings.ImageFormat);
+						showphase("Saving normal image");
+					}
 				}
 			}
 		}
@@ -138,18 +197,17 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 		/// <returns>The image to be exported</returns>
 		private void CreateImage(Bitmap texturebitmap, Vector2D offset, float scale, bool asbrightmap)
 		{
-			Graphics gtexture = null;
-
 			// The texture
-			gtexture = Graphics.FromImage(texturebitmap);
+			using (Graphics gtexture = Graphics.FromImage(texturebitmap))
+			{
 				gtexture.Clear(Color.Black); // If we don't clear to black we'll see seams where the sectors touch, due to the AA
 				gtexture.InterpolationMode = InterpolationMode.HighQualityBilinear;
 				gtexture.CompositingQuality = CompositingQuality.HighQuality;
 				gtexture.PixelOffsetMode = PixelOffsetMode.HighQuality;
 				gtexture.SmoothingMode = SmoothingMode.AntiAlias; // Without AA the sector edges will be quite rough
 
-			GraphicsPath gpath = new GraphicsPath();
+				using (GraphicsPath gpath = new GraphicsPath())
-
+				{
 					foreach (Sector s in sectors)
 					{
 						float rotation = (float)s.Fields.GetValue("rotationfloor", 0.0);
@@ -169,12 +227,25 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 							gpath.AddLine((float)v1.x, (float)v1.y, (float)v2.x, (float)v2.y);
 							gpath.AddLine((float)v2.x, (float)v2.y, (float)v3.x, (float)v3.y);
 							gpath.CloseFigure();
+
+							doneitems++;
+
+							int newpercent = (int)(((double)doneitems / numitems) * 100);
+							if (newpercent > donepercent)
+							{
+								donepercent = newpercent;
+								addprogress();
+
+								if (checkcanelexport())
+									throw new ImageExportCanceledException();
+							}
 						}
 
 						if (asbrightmap)
 						{
 							// Create the brightmap based on the sector brightness
-					using (SolidBrush sbrush = new SolidBrush(Color.FromArgb(255, s.Brightness, s.Brightness, s.Brightness)))
+							int brightness = General.Clamp(s.Brightness, 0, 255);
+							using (SolidBrush sbrush = new SolidBrush(Color.FromArgb(255, brightness, brightness, brightness)))
 								gtexture.FillPath(sbrush, gpath);
 						}
 						else
@@ -219,13 +290,16 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 							// Create the transformation matrix
 							Matrix matrix = new Matrix();
 							matrix.Rotate(rotation);
-					matrix.Translate((float)(-offset.x*scale * rotationvector.x), (float)(offset.x*scale * rotationvector.y)); // Left/right offset from the map origin
+							matrix.Translate((float)(-offset.x * scale * rotationvector.x), (float)(offset.x * scale * rotationvector.y)); // Left/right offset from the map origin
-					matrix.Translate((float)(offset.y*scale * rotationvector.y), (float)(offset.y*scale * rotationvector.x)); // Up/down offset from the map origin
+							matrix.Translate((float)(offset.y * scale * rotationvector.y), (float)(offset.y * scale * rotationvector.x)); // Up/down offset from the map origin
 							matrix.Translate(-(float)textureoffset.x, -(float)textureoffset.y); // Texture offset 
 							matrix.Scale((float)texturescale.x, (float)texturescale.y);
 
 							if (!settings.Fullbright)
-						AdjustBrightness(ref brushtexture, s.Brightness > 0 ? s.Brightness / 255.0f : 0.0f);
+							{
+								int brightness = General.Clamp(s.Brightness, 0, 255);
+								AdjustBrightness(ref brushtexture, brightness > 0 ? brightness / 255.0f : 0.0f);
+							}
 
 							if (scale > 1.0f)
 								ResizeImage(ref brushtexture, brushtexture.Width * (int)scale, brushtexture.Height * (int)scale);
@@ -246,10 +320,8 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 						// Reset the graphics path
 						gpath.Reset();
 					}
-
+				}
-			// Dispose unneeded objects
+			}
-			gpath.Dispose();
-			gtexture.Dispose();
 		}
 
 		/// <summary>
@@ -277,7 +349,6 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 					if(y * TILE_SIZE + TILE_SIZE > image.Size.Height)
 						height = image.Size.Height - (y * TILE_SIZE);
 
-
 					using (Bitmap bitmap = new Bitmap(TILE_SIZE, TILE_SIZE))
 					using (Graphics g = Graphics.FromImage(bitmap))
 					{
@@ -288,6 +359,21 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 					}
 
 					imagenum++;
+
+					doneitems++;
+
+					int newpercent = (int)(((double)doneitems / numitems) * 100);
+					if (newpercent > donepercent)
+					{
+						donepercent = newpercent;
+						addprogress();
+
+						if (checkcanelexport())
+							throw new ImageExportCanceledException();
+					}
+
+					if (checkcanelexport())
+						throw new ImageExportCanceledException();
 				}
 			}
 		}
@@ -325,7 +411,23 @@ namespace CodeImp.DoomBuilder.BuilderModes.IO
 			}
 
 			return imagenames;
+		}
 
+		/// <summary>
+		/// Gets the total number of tiles
+		/// </summary>
+		/// <returns>Number of tiles</returns>
+		public int GetNumTiles()
+		{
+			Vector2D size;
+			Vector2D offset;
+
+			GetSizeAndOffset(out size, out offset);
+
+			int xnum = (int)Math.Ceiling(size.x * settings.Scale / (double)TILE_SIZE);
+			int ynum = (int)Math.Ceiling(size.y * settings.Scale / (double)TILE_SIZE);
+
+			return xnum * ynum;
 		}
 
 		/// <summary>

Source/Plugins/BuilderModes/Interface/ImageExportSettingsForm.Designer.cs

@@ -31,7 +31,7 @@
 			this.tbExportPath = new System.Windows.Forms.TextBox();
 			this.browse = new System.Windows.Forms.Button();
 			this.label1 = new System.Windows.Forms.Label();
-			this.cancel = new System.Windows.Forms.Button();
+			this.close = new System.Windows.Forms.Button();
 			this.export = new System.Windows.Forms.Button();
 			this.saveFileDialog = new System.Windows.Forms.SaveFileDialog();
 			this.cbImageFormat = new System.Windows.Forms.ComboBox();
@@ -45,6 +45,8 @@
 			this.cbTiles = new System.Windows.Forms.CheckBox();
 			this.cbScale = new System.Windows.Forms.ComboBox();
 			this.label4 = new System.Windows.Forms.Label();
+			this.progress = new System.Windows.Forms.ProgressBar();
+			this.lbPhase = new System.Windows.Forms.Label();
 			this.SuspendLayout();
 			// 
 			// tbExportPath
@@ -73,16 +75,16 @@
 			this.label1.TabIndex = 4;
 			this.label1.Text = "Path:";
 			// 
-			// cancel
+			// close
 			// 
-			this.cancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+			this.close.DialogResult = System.Windows.Forms.DialogResult.Cancel;
-			this.cancel.Location = new System.Drawing.Point(360, 153);
+			this.close.Location = new System.Drawing.Point(360, 153);
-			this.cancel.Name = "cancel";
+			this.close.Name = "close";
-			this.cancel.Size = new System.Drawing.Size(75, 23);
+			this.close.Size = new System.Drawing.Size(75, 23);
-			this.cancel.TabIndex = 7;
+			this.close.TabIndex = 7;
-			this.cancel.Text = "Cancel";
+			this.close.Text = "Close";
-			this.cancel.UseVisualStyleBackColor = true;
+			this.close.UseVisualStyleBackColor = true;
-			this.cancel.Click += new System.EventHandler(this.cancel_Click);
+			this.close.Click += new System.EventHandler(this.close_Click);
 			// 
 			// export
 			// 
@@ -219,13 +221,34 @@
 			this.label4.TabIndex = 18;
 			this.label4.Text = "Scale:";
 			// 
+			// progress
+			// 
+			this.progress.Location = new System.Drawing.Point(12, 153);
+			this.progress.Name = "progress";
+			this.progress.Size = new System.Drawing.Size(261, 23);
+			this.progress.Step = 1;
+			this.progress.TabIndex = 19;
+			this.progress.Visible = false;
+			// 
+			// lbPhase
+			// 
+			this.lbPhase.AutoSize = true;
+			this.lbPhase.Location = new System.Drawing.Point(14, 127);
+			this.lbPhase.Name = "lbPhase";
+			this.lbPhase.Size = new System.Drawing.Size(45, 13);
+			this.lbPhase.TabIndex = 20;
+			this.lbPhase.Text = "lbPhase";
+			this.lbPhase.Visible = false;
+			// 
 			// ImageExportSettingsForm
 			// 
 			this.AcceptButton = this.export;
 			this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
 			this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
-			this.CancelButton = this.cancel;
+			this.CancelButton = this.close;
 			this.ClientSize = new System.Drawing.Size(447, 188);
+			this.Controls.Add(this.lbPhase);
+			this.Controls.Add(this.progress);
 			this.Controls.Add(this.label4);
 			this.Controls.Add(this.cbScale);
 			this.Controls.Add(this.cbTiles);
@@ -237,7 +260,7 @@
 			this.Controls.Add(this.label2);
 			this.Controls.Add(this.cbPixelFormat);
 			this.Controls.Add(this.cbImageFormat);
-			this.Controls.Add(this.cancel);
+			this.Controls.Add(this.close);
 			this.Controls.Add(this.export);
 			this.Controls.Add(this.label1);
 			this.Controls.Add(this.browse);
@@ -247,6 +270,7 @@
 			this.MinimizeBox = false;
 			this.Name = "ImageExportSettingsForm";
 			this.Text = "Image export settings";
+			this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.ImageExportSettingsForm_FormClosing);
 			this.ResumeLayout(false);
 			this.PerformLayout();
 
@@ -257,7 +281,7 @@
 		private System.Windows.Forms.Button browse;
 		private System.Windows.Forms.TextBox tbExportPath;
 		private System.Windows.Forms.Label label1;
-		private System.Windows.Forms.Button cancel;
+		private System.Windows.Forms.Button close;
 		private System.Windows.Forms.Button export;
 		private System.Windows.Forms.SaveFileDialog saveFileDialog;
 		private System.Windows.Forms.ComboBox cbImageFormat;
@@ -271,5 +295,7 @@
 		private System.Windows.Forms.CheckBox cbTiles;
 		private System.Windows.Forms.ComboBox cbScale;
 		private System.Windows.Forms.Label label4;
+		private System.Windows.Forms.ProgressBar progress;
+		private System.Windows.Forms.Label lbPhase;
 	}
 }

Source/Plugins/BuilderModes/Interface/ImageExportSettingsForm.cs

@@ -31,9 +31,19 @@ using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
+using CodeImp.DoomBuilder.Map;
+using CodeImp.DoomBuilder.BuilderModes.IO;
 
 namespace CodeImp.DoomBuilder.BuilderModes.Interface
 {
+	enum ImageExportResult
+	{
+		OK,
+		Canceled,
+		OutOfMemory,
+		ImageTooBig
+	}
+
 	public partial class ImageExportSettingsForm : Form
 	{
 		#region ================== Properties
@@ -47,6 +57,20 @@ namespace CodeImp.DoomBuilder.BuilderModes.Interface
 
 		#endregion
 
+		#region ================== Delegates
+
+		private delegate void CallVoidMethodDeletage();
+		private delegate void CallStringMethodDeletage(string s);
+		private delegate void CallImageExportResultMethodDeletage(ImageExportResult ier);
+
+		#endregion
+
+		#region ================== Variables
+
+		bool exporting;
+		bool cancelexport;
+
+		#endregion
 
 		#region ================== Constructor
 
@@ -56,6 +80,8 @@ namespace CodeImp.DoomBuilder.BuilderModes.Interface
 
 			cbImageFormat.SelectedIndex = 0;
 			cbPixelFormat.SelectedIndex = 0;
+			exporting = false;
+			cancelexport = false;
 
 			string name = Path.GetFileNameWithoutExtension(General.Map.FileTitle) + "_" + General.Map.Options.LevelName + "_" + Path.GetFileNameWithoutExtension(Path.GetRandomFileName());
 
@@ -104,6 +130,153 @@ namespace CodeImp.DoomBuilder.BuilderModes.Interface
 			}
 		}
 
+		/// <summary>
+		/// Starts exporting the image(s). Disables all controls and starts the thread that does the actual exporting.
+		/// </summary>
+		private void StartExport()
+		{
+			ICollection<Sector> sectors = General.Map.Map.SelectedSectorsCount == 0 ? General.Map.Map.Sectors : General.Map.Map.GetSelectedSectors(true);
+
+			exporting = true;
+			cancelexport = false;
+
+			progress.Maximum = 100; //sectors.Count * (Brightmap ? 2 : 1);
+			progress.Value = 0;
+			progress.Visible = true;
+
+			lbPhase.Text = "";
+			lbPhase.Visible = true;
+
+			foreach (Control c in Controls)
+			{
+				if (!(c is ProgressBar || c is Label))
+					c.Enabled = false;
+			}
+
+			export.Enabled = true;
+			export.Text = "Cancel";
+
+			ImageExportSettings settings = new ImageExportSettings(Path.GetDirectoryName(FilePath), Path.GetFileNameWithoutExtension(FilePath), Path.GetExtension(FilePath), Floor, Fullbright, Brightmap, Tiles, ImageScale, GetPixelFormat(), GetImageFormat());
+
+			RunExport(settings);
+		}
+
+		/// <summary>
+		/// Enables all controls. This has to be called when the export is finished (either successfully or unsuccessfully)
+		/// </summary>
+		/// <param name="ier">Image export result</param>
+		private void StopExport(ImageExportResult ier)
+		{
+			if (this.InvokeRequired)
+			{
+				CallImageExportResultMethodDeletage d = StopExport;
+				this.Invoke(d, ier);
+			}
+			else
+			{
+				progress.Visible = false;
+				lbPhase.Visible = false;
+
+				foreach (Control c in Controls)
+				{
+					if (!(c is ProgressBar || c is Label))
+						c.Enabled = true;
+				}
+
+				export.Text = "Export";
+
+				if (ier == ImageExportResult.OK)
+					MessageBox.Show("Export successful.", "Export to image", MessageBoxButtons.OK, MessageBoxIcon.Information);
+				else if(ier == ImageExportResult.Canceled)
+					MessageBox.Show("Export canceled.", "Export to image", MessageBoxButtons.OK, MessageBoxIcon.Information);
+				else if (ier == ImageExportResult.OutOfMemory)
+					MessageBox.Show("Exporting failed. There's likely not enough consecutive free memory to create the image. Try a lower color depth or file format", "Export failed", MessageBoxButtons.OK, MessageBoxIcon.Error);
+				else if(ier == ImageExportResult.ImageTooBig)
+					MessageBox.Show("Exporting failed. The image is likely too big for the current settings. Try a lower color depth or file format", "Export failed", MessageBoxButtons.OK, MessageBoxIcon.Error);
+			}
+
+			exporting = false;
+		}
+
+		private bool CheckCancelExport()
+		{
+			return cancelexport;
+		}
+
+		/// <summary>
+		/// Shows the current phase in textual form. Is called by the exporter
+		/// </summary>
+		/// <param name="text"></param>
+		private void ShowPhase(string text)
+		{
+			if (this.InvokeRequired)
+			{
+				CallStringMethodDeletage d = ShowPhase;
+				this.Invoke(d, text);
+			}
+			else
+			{
+				lbPhase.Text = text;
+			}
+		}
+
+		/// <summary>
+		/// Adds progress to the progress bar. Is called by the exporter
+		/// </summary>
+		private void AddProgress()
+		{
+			if (progress.InvokeRequired)
+			{
+				CallVoidMethodDeletage d = AddProgress;
+				progress.Invoke(d);
+			}
+			else
+			{
+				// Just winforms things to make the progress bar animation not lag behind
+				int value = progress.Value + 1;
+				progress.Value = value;
+				progress.Value = value - 1;
+				progress.Value = value;
+			}
+		}
+
+		/// <summary>
+		/// Runs the actual exporter
+		/// </summary>
+		/// <param name="settings">Export settings</param>
+		private void RunExport(ImageExportSettings settings)
+		{
+			ICollection<Sector> sectors = General.Map.Map.SelectedSectorsCount == 0 ? General.Map.Map.Sectors : General.Map.Map.GetSelectedSectors(true);
+
+			ImageExporter exporter = new ImageExporter(sectors, settings, AddProgress, ShowPhase, CheckCancelExport);
+
+			try
+			{
+				exporter.Export();
+			}
+			catch (ArgumentException) // Happens if there's not enough consecutive memory to create the file
+			{
+				StopExport(ImageExportResult.OutOfMemory);
+				return;
+			}
+			catch(ImageExportCanceledException)
+			{
+				StopExport(ImageExportResult.Canceled);
+				return;
+			}
+			catch(ImageExportImageTooBigException)
+			{
+				StopExport(ImageExportResult.ImageTooBig);
+				return;
+			}
+
+			StopExport(ImageExportResult.OK);
+		}
+
+		#endregion
+
+		#region ================== Events
+
 		private void browse_Click(object sender, EventArgs e)
 		{
 			if (saveFileDialog.ShowDialog() == DialogResult.OK)
@@ -124,23 +297,35 @@ namespace CodeImp.DoomBuilder.BuilderModes.Interface
 			}
 		}
 
-		#endregion
+		private void close_Click(object sender, EventArgs e)
-
-		private void cancel_Click(object sender, EventArgs e)
 		{
 			this.DialogResult = DialogResult.Cancel;
 			this.Close();
 		}
 
 		private void export_Click(object sender, EventArgs e)
+		{
+			if (exporting)
+			{
+				cancelexport = true;
+				export.Enabled = false;
+			}
+			else
 			{
 				General.Settings.WritePluginSetting("imageexportfullbright", cbFullbright.Checked);
 				General.Settings.WritePluginSetting("imageexportbrightmap", cbBrightmap.Checked);
 				General.Settings.WritePluginSetting("imageexporttiles", cbTiles.Checked);
 				General.Settings.WritePluginSetting("imageexportscale", cbScale.SelectedIndex);
 
-			this.DialogResult = DialogResult.OK;
+				// Exporting works like this:
-			this.Close();
+				// In here StartExport() is called
+				// StartExport() disables all controls and creates a thread that runs RunExport() in the background; then the StartExport method ends
+				// RunExport() creates an instance of ImageExporter and starts the actual export
+				// When ImageExporter finishes its job it runs StopExport()
+				// StopExport() enables all controls again
+
+				StartExport();
+			}
 		}
 
 		private void cbImageFormat_SelectedIndexChanged(object sender, EventArgs e)
@@ -159,5 +344,15 @@ namespace CodeImp.DoomBuilder.BuilderModes.Interface
 
 			tbExportPath.Text = Path.ChangeExtension(tbExportPath.Text, newextension);
 		}
+
+
+		private void ImageExportSettingsForm_FormClosing(object sender, FormClosingEventArgs e)
+		{
+			// Do not allow closing the form while the export is running
+			if (exporting)
+				e.Cancel = true;
+		}
+
+		#endregion
 	}
 }