fix #292: Implement interface does not show generated code

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Refactoring/EditorScript.cs

@@ -7,6 +7,7 @@ using System.ComponentModel.Design;
 using System.Linq;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
@@ -285,6 +286,7 @@ namespace CSharpBinding.Refactoring
 			this.editor.TextView.InsertLayer(this, KnownLayer.Text, LayerInsertionPosition.Above);
 			this.editor.TextView.ScrollOffsetChanged += TextViewScrollOffsetChanged;
 			ScrollToInsertionPoint();
+			AttachToCodeEditor();
 		}
 		
 		static readonly Pen markerPen = new Pen(Brushes.Blue, 1);
@@ -331,6 +333,7 @@ namespace CSharpBinding.Refactoring
 		
 		public void Dispose()
 		{
+			groupBox.Remove();
 			editor.TextView.Layers.Remove(this);
 			editor.ActiveInputHandler = editor.DefaultInputHandler;
 			editor.TextView.ScrollOffsetChanged -= TextViewScrollOffsetChanged;
@@ -351,6 +354,7 @@ namespace CSharpBinding.Refactoring
 		{
 			FireExited(false);
 		}
+		
 		/// <summary>
 		/// call this somewhere useful, please... :)
 		/// </summary>
@@ -365,6 +369,28 @@ namespace CSharpBinding.Refactoring
 				Exited(this, new InsertionCursorEventArgs(insertionPoints[CurrentInsertionPoint], success));
 			}
 		}
+		
+		IOverlayUIElement groupBox;
+		
+		void AttachToCodeEditor()
+		{
+			if (editor.Document == null)
+				return; // editor was disposed
+			
+			var content = new StackPanel {
+				Children = {
+					new TextBlock {
+						Text = "Use Up/Down to move to another location.\r\n" +
+							"Press Enter to select the location.\r\n" +
+							"Press Esc to cancel this operation."
+					}
+				}
+			};
+			
+			groupBox = editor.GetService<IEditorUIService>().CreateOverlayUIElement(content);
+			
+			groupBox.Title = operation;
+		}
 	}
 	
 	public class InsertionCursorEventArgs : EventArgs

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/AvalonEditEditorUIService.cs

@@ -34,6 +34,21 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			return inline;
 		}
 		
+		/// <inheritdoc />
+		public IOverlayUIElement CreateOverlayUIElement(UIElement element)
+		{
+			if (element == null)
+				throw new ArgumentNullException("element");
+			CodeEditor codeEditor = textView.GetService<CodeEditor>();
+			if (codeEditor == null)
+				throw new NotSupportedException("This feature is not supported!");
+			var groupBox = new OverlayUIElementContainer(codeEditor);
+			groupBox.Content = element;
+			codeEditor.Children.Add(groupBox);
+			System.Windows.Controls.Grid.SetRow(groupBox, 1);
+			return groupBox;
+		}
+		
 		/// <inheritdoc />
 		public Point GetScreenPosition(int line, int column)
 		{

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/InlineUIElementGenerator.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Windows;
+using System.Windows.Controls;
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Rendering;
 using ICSharpCode.NRefactory.Editor;
@@ -45,4 +46,33 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			this.textView.ElementGenerators.Remove(this);
 		}
 	}
+	
+	sealed class OverlayUIElementContainer : GroupBox, IOverlayUIElement
+	{
+		CodeEditor codeEditor;
+		
+		public OverlayUIElementContainer(CodeEditor codeEditor)
+		{
+			if (codeEditor == null)
+				throw new ArgumentNullException("codeEditor");
+			this.codeEditor = codeEditor;
+			
+			Background = SystemColors.WindowBrush;
+			Foreground = SystemColors.WindowTextBrush;
+			HorizontalAlignment = HorizontalAlignment.Right;
+			VerticalAlignment = VerticalAlignment.Bottom;
+			MaxWidth = 300;
+			Margin = new Thickness(0, 0, 20, 20);
+		}
+		
+		public void Remove()
+		{
+			codeEditor.Children.Remove(this);
+		}
+
+		public string Title {
+			get { return Header.ToString(); }
+			set { Header = value; }
+		}
+	}
 }

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/NewLineConsistencyCheck.cs

@@ -9,6 +9,7 @@ using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.Core;
 using ICSharpCode.NRefactory.Editor;
 using ICSharpCode.SharpDevelop;
+using ICSharpCode.SharpDevelop.Editor;
 
 namespace ICSharpCode.AvalonEdit.AddIn
 {
@@ -66,8 +67,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			}
 		}
 		
-		
-		GroupBox groupBox;
+		IOverlayUIElement groupBox;
 		Button normalizeButton, cancelButton;
 		RadioButton windows, unix;
 		
@@ -76,16 +76,6 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			if (editor.Document == null)
 				return; // editor was disposed
 			
-			groupBox = new GroupBox();
-			groupBox.Background = SystemColors.WindowBrush;
-			groupBox.Foreground = SystemColors.WindowTextBrush;
-			groupBox.Header = ResourceService.GetString("AddIns.AvalonEdit.InconsistentNewlines.Header");
-			groupBox.HorizontalAlignment = HorizontalAlignment.Right;
-			groupBox.VerticalAlignment = VerticalAlignment.Bottom;
-			groupBox.MaxWidth = 300;
-			groupBox.Margin = new Thickness(0, 0, 20, 20);
-			Grid.SetRow(groupBox, 1);
-			
 			windows = new RadioButton {
 				IsChecked = !preferUnixNewLines,
 				Content = ResourceService.GetString("Dialog.Options.IDEOptions.LoadSaveOptions.WindowsRadioButton"),
@@ -99,7 +89,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 			normalizeButton = new Button { Content = ResourceService.GetString("AddIns.AvalonEdit.InconsistentNewlines.Normalize") };
 			cancelButton = new Button { Content = ResourceService.GetString("Global.CancelButtonText") };
 			
-			groupBox.Content = new StackPanel {
+			var content = new StackPanel {
 				Children = {
 					new TextBlock {
 						Text = ResourceService.GetString("AddIns.AvalonEdit.InconsistentNewlines.Description"),
@@ -114,13 +104,15 @@ namespace ICSharpCode.AvalonEdit.AddIn
 					}
 				}
 			};
-			editor.Children.Add(groupBox);
+			
+			groupBox = editor.GetService<IEditorUIService>().CreateOverlayUIElement(content);
+			groupBox.Title = ResourceService.GetString("AddIns.AvalonEdit.InconsistentNewlines.Header");
 			
 			var featureUse = SD.AnalyticsMonitor.TrackFeature(typeof(NewLineConsistencyCheck));
 			
 			EventHandler removeWarning = null;
 			removeWarning = delegate {
-				editor.Children.Remove(groupBox);
+				groupBox.Remove();
 				editor.PrimaryTextEditor.TextArea.Focus();
 				editor.LoadedFileContent -= removeWarning;
 				

src/Main/Base/Project/Editor/IEditorUIService.cs

@@ -18,6 +18,8 @@ namespace ICSharpCode.SharpDevelop.Editor
 	{
 		IInlineUIElement CreateInlineUIElement(ITextAnchor position, UIElement element);
 		
+		IOverlayUIElement CreateOverlayUIElement(UIElement element);
+		
 		/// <summary>
 		/// Gets the absolute screen position of given position in the document.
 		/// </summary>
@@ -33,4 +35,10 @@ namespace ICSharpCode.SharpDevelop.Editor
 	{
 		void Remove();
 	}
+	
+	public interface IOverlayUIElement
+	{
+		void Remove();
+		string Title { get; set; }
+	}
 }