When CodeCompletion window is empty, it shows "Press Ctrl+Space to show items from all namespaces", so that user learns how to use Ctrl+Space naturally.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5891 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/DisplayBindings/AvalonEdit.AddIn/AvalonEdit.AddIn.csproj

@@ -152,6 +152,7 @@
     <EmbeddedResource Include="Resources\ReverseIncrementalSearchCursor.cur" />
   </ItemGroup>
   <ItemGroup>
+    <Page Include="Src\SharpDevelopCompletionWindow.xaml" />
     <Page Include="themes\generic.xaml" />
     <ProjectReference Include="..\..\..\Libraries\AvalonEdit\ICSharpCode.AvalonEdit\ICSharpCode.AvalonEdit.csproj">
       <Project>{6C55B776-26D4-4DB3-A6AB-87E783B2F3D1}</Project>

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

@@ -11,10 +11,10 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
-
 using ICSharpCode.AvalonEdit.CodeCompletion;
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Editing;
+using ICSharpCode.Core;
 using ICSharpCode.SharpDevelop;
 using ICSharpCode.SharpDevelop.Editor;
 using ICSharpCode.SharpDevelop.Editor.CodeCompletion;
@@ -84,6 +84,7 @@ namespace ICSharpCode.AvalonEdit.AddIn
 					this.CompletionList.SelectedItem = adapter;
 			}
 			this.StartOffset -= itemList.PreselectionLength;
+			this.EmptyContent = StringParser.Parse("${res:ICSharpCode.AvalonEdit.AddIn.SharpDevelopCompletionWindow.EmptyText}");
 		}
 		
 		protected override void OnSourceInitialized(EventArgs e)

src/AddIns/DisplayBindings/AvalonEdit.AddIn/Src/SharpDevelopCompletionWindow.xaml

@@ -0,0 +1,16 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+	xmlns:core="http://icsharpcode.net/sharpdevelop/core"
+	xmlns:local="clr-namespace:ICSharpCode.AvalonEdit.AddIn"
+>
+	<!-- Attempt to set SharpDevelopCompletionWindow.EmptyContent in xaml
+	<Style TargetType="{x:Type local:SharpDevelopCompletionWindow}">
+		<Setter Property="EmptyContent">
+			<Setter.Value>
+				<TextBlock Text="{core:Localize ICSharpCode.AvalonEdit.AddIn.SharpDevelopCompletionWindow.EmptyText}"
+							FontStyle="Italic" Foreground="Gray"></TextBlock>
+			</Setter.Value>
+		</Setter>
+	</Style>
+	-->
+</ResourceDictionary>

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/CodeCompletion/CompletionList.cs

@@ -38,6 +38,22 @@ namespace ICSharpCode.AvalonEdit.CodeCompletion
 			set { isFiltering = value; }
 		}
 		
+		/// <summary>
+		/// Dependency property for <see cref="EmptyContent" />.
+		/// </summary>
+		public static readonly DependencyProperty EmptyContentProperty =
+			DependencyProperty.Register("EmptyContent", typeof(object), typeof(CompletionList),
+			                            new FrameworkPropertyMetadata());
+		
+		/// <summary>
+		/// Content of EmptyTemplate will be shown when CompletionList contains no items.
+		/// If EmptyTemplate is null, nothing will be shown.
+		/// </summary>
+		public object EmptyContent {
+			get { return (object)GetValue(EmptyContentProperty); }
+			set { SetValue(EmptyContentProperty, value); }
+		}
+		
 		/// <summary>
 		/// Is raised when the completion list indicates that the user has chosen
 		/// an entry to be completed.

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/CodeCompletion/CompletionList.xaml

@@ -34,6 +34,23 @@
 		</Setter>
 	</Style>
 	
+	<Style TargetType="cc:CompletionListBox" BasedOn="{StaticResource {x:Type ListBox}}">
+		<Style.Triggers>
+        <DataTrigger 
+            Binding="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=HasItems}" 
+            Value="False"
+            >
+            <Setter Property="Template">
+                <Setter.Value>
+                    <ControlTemplate TargetType="{x:Type cc:CompletionListBox}">
+                        <ContentPresenter Content="{TemplateBinding EmptyTemplate}"></ContentPresenter>
+                    </ControlTemplate>
+                </Setter.Value>
+            </Setter>
+        </DataTrigger>
+    </Style.Triggers>
+	</Style>
+	
 	<Style TargetType="{x:Type cc:CompletionList}">
 		<Setter Property="Template">
 			<Setter.Value>
@@ -47,6 +64,10 @@
 								</StackPanel>
 							</DataTemplate>
 						</ItemsControl.ItemTemplate>
+						<cc:CompletionListBox.EmptyTemplate>
+							<!-- This could be a ContentPresenter showing any content, not just TextBlock -->
+							<TextBlock Text="{TemplateBinding EmptyContent}" TextWrapping="Wrap" FontStyle="Italic" Foreground="Gray"></TextBlock>
+						</cc:CompletionListBox.EmptyTemplate>
 					</cc:CompletionListBox>
 				</ControlTemplate>
 			</Setter.Value>

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/CodeCompletion/CompletionListBox.cs

@@ -17,8 +17,29 @@ namespace ICSharpCode.AvalonEdit.CodeCompletion
 	/// </summary>
 	public class CompletionListBox : ListBox
 	{
+		static CompletionListBox()
+		{
+			DefaultStyleKeyProperty.OverrideMetadata(typeof(CompletionListBox),
+			                                         new FrameworkPropertyMetadata(typeof(CompletionListBox)));
+		}
+		
 		internal ScrollViewer scrollViewer;
 		
+		/// <summary>
+		/// Dependency property for <see cref="EmptyTemplate" />.
+		/// </summary>
+		public static readonly DependencyProperty EmptyTemplateProperty =
+			DependencyProperty.Register("EmptyTemplate", typeof(object), typeof(CompletionListBox),
+			                            new FrameworkPropertyMetadata());
+		/// <summary>
+		/// Content of EmptyTemplate will be shown when CompletionListBox contains no items.
+		/// If EmptyTemplate is null, nothing will be shown.
+		/// </summary>
+		public object EmptyTemplate {
+			get { return (object)GetValue(EmptyTemplateProperty); }
+			set { SetValue(EmptyTemplateProperty, value); }
+		}
+		
 		/// <inheritdoc/>
 		public override void OnApplyTemplate()
 		{

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit/CodeCompletion/CompletionWindow.cs

@@ -10,9 +10,9 @@ using System.Diagnostics;
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
+using System.Windows.Data;
 using System.Windows.Input;
 using System.Windows.Threading;
-
 using ICSharpCode.AvalonEdit.Document;
 using ICSharpCode.AvalonEdit.Editing;
 
@@ -40,6 +40,7 @@ namespace ICSharpCode.AvalonEdit.CodeCompletion
 			// prevent user from resizing window to 0x0
 			this.MinHeight = 15;
 			this.MinWidth = 30;
+			this.EmptyContent = null;
 			
 			toolTip.PlacementTarget = this;
 			toolTip.Placement = PlacementMode.Right;
@@ -50,6 +51,18 @@ namespace ICSharpCode.AvalonEdit.CodeCompletion
 			AttachEvents();
 		}
 		
+		/// <summary>
+		/// Content that will be shown when the CompletionWindow contains no items.
+		/// </summary>
+		public object EmptyContent {
+			get { 
+				return this.completionList.EmptyContent; 
+			}
+			set { 
+				this.completionList.EmptyContent = value; 
+			}
+		}
+		
 		#region ToolTip handling
 		void toolTip_Closed(object sender, RoutedEventArgs e)
 		{