language editor: display error message with stacktrace in case of unexpected exception

git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2180 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4

GreenshotLanguageEditor/App.xaml.cs

@@ -1,15 +1,21 @@
 using System;
 using System.Windows;
+using System.Windows.Threading;
 using System.Data;
 using System.Xml;
 using System.Configuration;
 
-namespace GreenshotLanguageEditor
-{
+namespace GreenshotLanguageEditor {
 	/// <summary>
 	/// Interaction logic for App.xaml
 	/// </summary>
-	public partial class App : Application
-	{
+	public partial class App : Application {
+		public App() :base () {
+			this.DispatcherUnhandledException += new DispatcherUnhandledExceptionEventHandler(App_DispatcherUnhandledException);
+		}
+		void App_DispatcherUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e) {
+		    new ErrorWindow(e.Exception).ShowDialog();
+            e.Handled = true;
+        }
 	}
 }

GreenshotLanguageEditor/ErrorWindow.xaml.cs

@@ -15,6 +15,7 @@ using System.Windows.Data;
 using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
+using Greenshot.Helpers;
 
 namespace GreenshotLanguageEditor
 {
@@ -23,11 +24,14 @@ namespace GreenshotLanguageEditor
 	/// </summary>
 	public partial class ErrorWindow : Window
 	{
-		public ErrorWindow(string msg)
+		public ErrorWindow(Exception e)
 		{
 			InitializeComponent();
+			this.Title = "Unexpected Error in GreenshotLanguageEditor";
+
+			this.textBox.Text = "Sorry, an unexpected error occurred :(\n\n"
+				+ EnvironmentInfo.BuildReport(e);
 			
-			this.textBox.Text = msg;
 		}
 	}
 }