Fixed, Game configurations window: new test engine entry was still added when pressing "New Test Engine" button, then canceling the browse dialog.

Fixed, general interface: in some cases opening "Test Map" drop-down resulted in an exception when trying to access a disposed/non-existing test engine icon.

Source/Core/GZBuilder/Data/EngineInfo.cs

@@ -1,27 +1,48 @@
-using System;
+#region ================== Namespaces
+
+using System;
 using System.Drawing;
 using System.IO;
 
+#endregion
+
 namespace CodeImp.DoomBuilder.GZBuilder.Data 
 {
 	public class EngineInfo : IDisposable
 	{
-        // Disposing
+		#region ================== Constants
-        private bool isdisposed;
 
-        public const string DEFAULT_ENGINE_NAME = "Engine with no name";
+		public const string DEFAULT_ENGINE_NAME = "Engine with no name";
 
+		#endregion
+
+		#region ================== Variables
+
+		// Settings
 		private string testprogramname;
-		public string TestProgramName { get { return testprogramname; } set { testprogramname = value; CheckProgramName(); } }
+		private string testprogram;
-		public string TestProgram;
+		private Bitmap icon;
 		public string TestParameters;
 		public bool CustomParameters;
 		public int TestSkill;
         public string TestSkin;
         public int TestGametype;
 		public bool TestShortPaths;
-		private Bitmap icon;
+
-		public Bitmap TestProgramIcon { get { return icon; } }
+		// Disposing
+		private bool isdisposed;
+
+		#endregion
+
+		#region ================== Properties
+
+		public string TestProgramName { get { return testprogramname; } set { testprogramname = value; CheckProgramName(); } }
+		public string TestProgram { get { return testprogram; } set { testprogram = value; CheckProgramName(); } }
+		public Bitmap TestProgramIcon { get { if(icon == null) UpdateIcon(); return icon; } }
+
+		#endregion
+
+		#region ================== Constructors / Disposer
 
 		public EngineInfo()
 		{
@@ -31,34 +52,54 @@ namespace CodeImp.DoomBuilder.GZBuilder.Data
 		public EngineInfo(EngineInfo other)
 		{
 			testprogramname = other.TestProgramName;
-			TestProgram = other.TestProgram;
+			testprogram = other.testprogram;
 			TestParameters = other.TestParameters;
 			CustomParameters = other.CustomParameters;
 			TestSkill = other.TestSkill;
             TestSkin = other.TestSkin;
             TestGametype = other.TestGametype;
 			TestShortPaths = other.TestShortPaths;
-			icon = other.icon;
+
+			UpdateIcon();
 		}
 
+		public void Dispose()
+		{
+			// Not already disposed?
+			if(!isdisposed)
+			{
+				// Clean up
+				icon.Dispose();
+
+				// Done
+				isdisposed = true;
+			}
+		}
+
+		#endregion
+
+		#region ================== Methods
+
 		private void CheckProgramName() 
 		{
-			if(testprogramname == DEFAULT_ENGINE_NAME && !String.IsNullOrEmpty(TestProgram)) 
+			if(testprogramname == DEFAULT_ENGINE_NAME && !String.IsNullOrEmpty(testprogram)) 
 			{
 				// Get engine name from path
-				testprogramname = Path.GetFileNameWithoutExtension(TestProgram);
+				testprogramname = Path.GetFileNameWithoutExtension(testprogram);
 			}
+		}
 
-			// Update icon
+		private void UpdateIcon()
+		{
 			if(icon != null)
 			{
 				icon.Dispose();
 				icon = null;
 			}
 
-			if(File.Exists(TestProgram))
+			if(File.Exists(testprogram))
 			{
-				Icon i = Icon.ExtractAssociatedIcon(TestProgram);
+				Icon i = Icon.ExtractAssociatedIcon(testprogram);
 				icon = (i != null ? i.ToBitmap() : new Bitmap(Properties.Resources.Question));
 			}
 			else
@@ -67,17 +108,6 @@ namespace CodeImp.DoomBuilder.GZBuilder.Data
 			}
 		}
 
-        public void Dispose()
+		#endregion
-        {
+	}
-            // Not already disposed?
-            if (!isdisposed)
-            {
-                // Clean up
-                icon.Dispose();
-
-                // Done
-                isdisposed = true;
-            }
-        }
-    }
 }

Source/Core/Windows/ConfigForm.cs

@@ -746,31 +746,41 @@ namespace CodeImp.DoomBuilder.Windows
 		//mxd
 		private void btnNewEngine_Click(object sender, EventArgs e) 
 		{
-			preventchanges = true;
+			// Set initial directory?
+			if(testapplication.Text.Length > 0)
+			{
+				try { testprogramdialog.InitialDirectory = Path.GetDirectoryName(testapplication.Text); }
+				catch(Exception) { }
+			}
 
-			EngineInfo newInfo = new EngineInfo();
+			// Browse for test program
-			newInfo.TestSkill = (int)Math.Ceiling(gameconfig.Skills.Count / 2f); //set Medium skill level
+			if(testprogramdialog.ShowDialog() == DialogResult.OK)
-            newInfo.TestSkin = "Sonic";
+			{
-            newInfo.TestGametype = -1; //Single player
+				preventchanges = true;
-			configinfo.TestEngines.Add(newInfo);
-			configinfo.Changed = true;
 
-			//store current engine name
+				// Add new EngineInfo
-			if(!String.IsNullOrEmpty(cbEngineSelector.Text))
+				EngineInfo newInfo = new EngineInfo();
-				configinfo.TestProgramName = cbEngineSelector.Text;
+				newInfo.TestSkill = (int)Math.Ceiling(gameconfig.Skills.Count / 2f); // Set Medium skill level
+				configinfo.TestEngines.Add(newInfo);
+				configinfo.Changed = true;
 
-			//refresh engines list
+				// Store current engine name
-			cbEngineSelector.Items.Clear();
+				if(!String.IsNullOrEmpty(cbEngineSelector.Text))
-			foreach(EngineInfo info in configinfo.TestEngines)
+					configinfo.TestProgramName = cbEngineSelector.Text;
-				cbEngineSelector.Items.Add(info.TestProgramName);
 
-			cbEngineSelector.SelectedIndex = configinfo.TestEngines.Count - 1;
+				// Refresh engines list
-			btnRemoveEngine.Enabled = true;
+				cbEngineSelector.Items.Clear();
+				foreach(EngineInfo info in configinfo.TestEngines)
+					cbEngineSelector.Items.Add(info.TestProgramName);
 
-			preventchanges = false;
+				cbEngineSelector.SelectedIndex = configinfo.TestEngines.Count - 1;
+				btnRemoveEngine.Enabled = true;
 
-			// Open engine browser
+				preventchanges = false;
-			browsetestprogram_Click(this, EventArgs.Empty);
+
+				// Set engine path
+				testapplication.Text = testprogramdialog.FileName;
+			}
 		}
 
 		//mxd