improve information provided in WpfDocumentError

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.AddIn/Src/WpfDocumentError.xaml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <UserControl
 	x:Class="ICSharpCode.WpfDesign.AddIn.WpfDocumentError" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 	Background="#888">
@@ -6,50 +6,72 @@
 		Background="#DDD"
 		BorderBrush="#999"
 		BorderThickness="2"
-		Height="150"
-		Width="500">
+		Width="500"
+		VerticalAlignment="Center"
+		MaxHeight="380">
 		<Border.Effect>
 			<DropShadowEffect
 				BlurRadius="15"
 				Color="#777"
 				ShadowDepth="2" />
 		</Border.Effect>
-		<Grid>
-			<Image
-				Name="ErrorIcon"
-				Width="32"
-				Height="32"
-				Margin="10,10,0,0"
-				Source="../Images/Icons.32x32.Error.png"
-				HorizontalAlignment="Left"
-				VerticalAlignment="Top" />
-			<TextBlock
-				Text="Problem Loading"
-				Foreground="#333"
-				Margin="50,10,0,0"
-				FontSize="16" />
+		<StackPanel
+			Orientation="Vertical">
+			<StackPanel
+				Orientation="Horizontal"
+				Height="50"
+				HorizontalAlignment="Left">
+				<Image
+					Margin="10,10,0,5"
+					Name="ErrorIcon"
+					Width="32"
+					Height="32"
+					Source="../Images/Icons.32x32.Error.png"
+					HorizontalAlignment="Left"
+					VerticalAlignment="Top" />
+				<TextBlock
+					Text="Problem Loading"
+					Foreground="#333"
+					FontSize="16"
+					Margin="10,10,0,5"
+					VerticalAlignment="Center"
+					HorizontalAlignment="Left" />
+			</StackPanel>
 			<Line
+				Y1="5"
+				Y2="5"
 				X1="50"
 				X2="450"
-				Y1="40"
-				Y2="40"
 				Stroke="#444"
 				StrokeThickness="0.5" />
 			<TextBlock
 				TextWrapping="Wrap"
 				Text="The document contains errors which should be fixed so that the designer can load. Switch to XAML Tab to fix the errors."
-				Margin="50,50,20,0"
 				VerticalAlignment="Top"
 				FontSize="14"
-				Foreground="#333" />
+				Foreground="#333"
+				HorizontalAlignment="Left"
+				Margin="50,10,10,10" />
 			<TextBlock
-				Margin="50,0,0,20"
 				HorizontalAlignment="Left"
-				VerticalAlignment="Bottom">
+				VerticalAlignment="Bottom"
+				Margin="50,10,10,10">
 				<Hyperlink
 					Foreground="Black"
 					Click="ViewXaml">View XAML</Hyperlink>
 			</TextBlock>
-		</Grid>
+			<GroupBox
+				x:Name="additionalInfoBox"
+				Header="Additional information"
+				Margin="50,10,10,20">
+				<TextBox
+					Margin="3"
+					HorizontalScrollBarVisibility="Auto"
+					VerticalScrollBarVisibility="Auto"
+					x:Name="additionalInfo"
+					IsReadOnly="True"
+					MinLines="10" />
+			</GroupBox>
+		</StackPanel>
 	</Border>
 </UserControl>

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.AddIn/Src/WpfDocumentError.xaml.cs

@@ -14,9 +14,13 @@ namespace ICSharpCode.WpfDesign.AddIn
 	/// </summary>
 	public partial class WpfDocumentError : UserControl
 	{
-		public WpfDocumentError()
+		public WpfDocumentError(Exception e = null)
 		{
 			InitializeComponent();
+			if (e != null)
+				additionalInfo.Text = e.ToString();
+			else
+				additionalInfoBox.Visibility = Visibility.Collapsed;
 		}
 		
 		void ViewXaml(object sender,RoutedEventArgs e)

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.AddIn/Src/WpfViewContent.cs

@@ -101,13 +101,12 @@ namespace ICSharpCode.WpfDesign.AddIn
 					propertyGridView.PropertyGrid.SelectedItems = null;
 					designer.DesignContext.Services.Selection.SelectionChanged += OnSelectionChanged;
 					designer.DesignContext.Services.GetService<UndoService>().UndoStackChanged += OnUndoStackChanged;
-				} catch {
-					this.UserContent = new WpfDocumentError();
+				} catch (Exception e) {
+					this.UserContent = new WpfDocumentError(e);
 				}
 			}
 		}
 		
-		
 		private MemoryStream _stream;
 		
 		protected override void SaveInternal(OpenedFile file, System.IO.Stream stream)