Merge pull request #446 from jogibear9988/master

Many small fixes & Extensions for the WPF Designer

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Controls/AdornerLayer.cs

@@ -221,11 +221,11 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 		
 		protected override Size ArrangeOverride(Size finalSize)
 		{
-			foreach (AdornerPanel adorner in this.Children) {
-				adorner.Arrange(new Rect(new Point(0, 0), adorner.DesiredSize));
+			foreach (AdornerPanel adorner in this.Children) {				
 				if (adorner.AdornedElement.IsDescendantOf(_designPanel)) {
 					adorner.RenderTransform = (Transform)adorner.AdornedElement.TransformToAncestor(_designPanel);
 				}
+				adorner.Arrange(new Rect(new Point(0, 0), adorner.DesiredSize));
 			}
 			return finalSize;
 		}

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Controls/PanelMoveAdorner.cs

@@ -54,7 +54,7 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 		protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
 		{
 			e.Handled = true;
-			item.Services.Selection.SetSelectedComponents(new DesignItem [] { item }, SelectionTypes.Auto);
+			//item.Services.Selection.SetSelectedComponents(new DesignItem [] { item }, SelectionTypes.Auto);
 			new DragMoveMouseGesture(item, false).Start(item.Services.DesignPanel, e);
 		}
 		

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/CanvasPositionExtension.cs

@@ -28,7 +28,7 @@ using ICSharpCode.WpfDesign.Extensions;
 namespace ICSharpCode.WpfDesign.Designer.Extensions
 {
 	[ExtensionFor(typeof(FrameworkElement))]
-	[ExtensionServer(typeof(PrimarySelectionExtensionServer))]
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
 	public class CanvasPositionExtension : AdornerProvider
 	{
 		private MarginHandle[] _handles;

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/QuickOperationMenuExtension.cs

@@ -31,6 +31,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 	/// <summary>
 	/// Extends the Quick operation menu for the designer.
 	/// </summary>
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
 	[ExtensionFor(typeof (FrameworkElement))]
 	class QuickOperationMenuExtension : PrimarySelectionAdornerProvider
 	{

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/RenderTransformOriginExtension.cs

@@ -32,6 +32,7 @@ using System.Windows.Media;
 
 namespace ICSharpCode.WpfDesign.Designer.Extensions
 {
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
 	[ExtensionFor(typeof(FrameworkElement))]
 	public class RenderTransformOriginExtension : SelectionAdornerProvider
 	{

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/ResizeThumbExtension.cs

@@ -32,6 +32,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 	/// <summary>
 	/// The resize thumb around a component.
 	/// </summary>
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
 	[ExtensionFor(typeof(FrameworkElement))]
 	public sealed class ResizeThumbExtension : SelectionAdornerProvider
 	{

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/RightClickContextMenuExtension.cs

@@ -30,6 +30,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 	/// <summary>
 	/// 
 	/// </summary>
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
 	[ExtensionFor(typeof(UIElement))]
 	public sealed class RightClickContextMenuExtension : PrimarySelectionAdornerProvider
 	{

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/RotateThumbExtension.cs

@@ -32,6 +32,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 	/// <summary>
 	/// The resize thumb around a component.
 	/// </summary>
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
 	[ExtensionFor(typeof(FrameworkElement))]
 	public sealed class RotateThumbExtension : SelectionAdornerProvider
 	{
@@ -41,6 +42,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 		readonly DesignItem[] extendedItemArray = new DesignItem[1];
 		IPlacementBehavior resizeBehavior;
 		PlacementOperation operation;
+		private AdornerLayer _adornerLayer;
 		
 		public RotateThumbExtension()
 		{
@@ -64,6 +66,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			DragListener drag = new DragListener(rotateThumb);
 			drag.Started += drag_Rotate_Started;
 			drag.Changed += drag_Rotate_Changed;
+			drag.Completed += drag_Rotate_Completed;
 			return rotateThumb;
 		}
 		
@@ -75,10 +78,11 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 		private RotateTransform rotateTransform;
 		private double initialAngle;
 		private DesignItem rtTransform;
-		private double angle;
-
+		
 		private void drag_Rotate_Started(DragListener drag)
 		{
+			_adornerLayer = this.adornerPanel.TryFindParent<AdornerLayer>();
+
 			var designerItem = this.ExtendedItem.Component as FrameworkElement;
 			this.parent = VisualTreeHelper.GetParent(designerItem) as UIElement;
 			this.centerPoint = designerItem.TranslatePoint(
@@ -135,10 +139,16 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 					rtTransform = this.ExtendedItem.Properties[FrameworkElement.RenderTransformProperty].Value;
 				}
 				rtTransform.Properties["Angle"].SetValue(destAngle);
-				this.angle = destAngle * Math.PI / 180.0;
+				
+				_adornerLayer.UpdateAdornersForElement(this.ExtendedItem.View, true);
 			}
 		}
 
+		void drag_Rotate_Completed(ICSharpCode.WpfDesign.Designer.Controls.DragListener drag)
+		{
+			operation.Commit();
+		}
+		
 		#endregion
 		
 		protected override void OnInitialized()
@@ -154,9 +164,6 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			
 			var designerItem = this.ExtendedItem.Component as FrameworkElement;
 			this.rotateTransform = designerItem.RenderTransform as RotateTransform;
-			
-			if (rotateTransform != null)
-				angle = rotateTransform.Angle;
 		}
 		
 		void OnPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/SkewThumbExtension.cs

@@ -0,0 +1,248 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Diagnostics;
+using System.Windows;
+using System.Windows.Controls.Primitives;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Shapes;
+using ICSharpCode.WpfDesign.Adorners;
+using ICSharpCode.WpfDesign.Designer.Controls;
+using ICSharpCode.WpfDesign.Extensions;
+using System.Collections.Generic;
+
+namespace ICSharpCode.WpfDesign.Designer.Extensions
+{
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
+	[ExtensionFor(typeof(FrameworkElement))]
+	public sealed class SkewThumbExtension : SelectionAdornerProvider
+	{
+		readonly AdornerPanel adornerPanel;
+		readonly DesignItem[] extendedItemArray = new DesignItem[1];
+		
+		private AdornerLayer _adornerLayer;
+		
+		public SkewThumbExtension()
+		{
+			adornerPanel = new AdornerPanel();
+			adornerPanel.Order = AdornerOrder.BeforeForeground;
+			this.Adorners.Add(adornerPanel);
+		}
+		
+		#region Skew
+		
+		private Point startPoint;
+		private UIElement parent;
+		private SkewTransform skewTransform;
+		private double skewX;
+		private double skewY;
+		private DesignItem rtTransform;
+		private Thumb thumb1;
+		private Thumb thumb2;
+		PlacementOperation operation;
+		
+		private void dragX_Started(DragListener drag)
+		{
+			_adornerLayer = this.adornerPanel.TryFindParent<AdornerLayer>();
+			
+			var designerItem = this.ExtendedItem.Component as FrameworkElement;
+			this.parent = VisualTreeHelper.GetParent(designerItem) as UIElement;
+			
+			startPoint = Mouse.GetPosition(this.parent);
+			
+			if (this.skewTransform == null)
+			{
+				this.skewX = 0;
+				this.skewY = 0;
+			}
+			else
+			{
+				this.skewX = this.skewTransform.AngleX;
+				this.skewY = this.skewTransform.AngleY;
+			}
+			
+			rtTransform = this.ExtendedItem.Properties[FrameworkElement.RenderTransformProperty].Value;
+			
+			operation = PlacementOperation.Start(extendedItemArray, PlacementType.Resize);
+		}
+		
+		private void dragX_Changed(DragListener drag)
+		{
+			Point currentPoint = Mouse.GetPosition(this.parent);
+			Vector deltaVector = Point.Subtract(currentPoint, this.startPoint);
+			
+			var destAngle = (-0.5*deltaVector.X) + skewX;
+			
+			if (destAngle == 0 && skewY == 0)
+			{
+				this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformProperty).Reset();
+				rtTransform = null;
+				skewTransform = null;
+			}
+			else
+			{
+				if (rtTransform == null)
+				{
+					if (!this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformOriginProperty).IsSet) {
+						this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformOriginProperty).SetValue(new Point(0.5,0.5));
+					}
+					
+					if (this.skewTransform == null)
+						this.skewTransform = new SkewTransform(0, 0);
+					this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformProperty).SetValue(skewTransform);
+					rtTransform = this.ExtendedItem.Properties[FrameworkElement.RenderTransformProperty].Value;
+				}
+				rtTransform.Properties["AngleX"].SetValue(destAngle);
+			}
+			
+			_adornerLayer.UpdateAdornersForElement(this.ExtendedItem.View, true);
+		}
+		
+		void dragX_Completed(ICSharpCode.WpfDesign.Designer.Controls.DragListener drag)
+		{
+			operation.Commit();
+		}
+		
+		private void dragY_Started(DragListener drag)
+		{
+			_adornerLayer = this.adornerPanel.TryFindParent<AdornerLayer>();
+			
+			var designerItem = this.ExtendedItem.Component as FrameworkElement;
+			this.parent = VisualTreeHelper.GetParent(designerItem) as UIElement;
+			
+			startPoint = Mouse.GetPosition(this.parent);
+			
+			if (this.skewTransform == null)
+			{
+				this.skewX = 0;
+				this.skewY = 0;
+			}
+			else
+			{
+				this.skewX = this.skewTransform.AngleX;
+				this.skewY = this.skewTransform.AngleY;
+			}
+			
+			rtTransform = this.ExtendedItem.Properties[FrameworkElement.RenderTransformProperty].Value;
+			
+			operation = PlacementOperation.Start(extendedItemArray, PlacementType.Resize);
+		}
+		
+		private void dragY_Changed(DragListener drag)
+		{
+			Point currentPoint = Mouse.GetPosition(this.parent);
+			Vector deltaVector = Point.Subtract(currentPoint, this.startPoint);
+			
+			var destAngle = (-0.5*deltaVector.Y) + skewY;
+			
+			if (destAngle == 0 && skewX == 0)
+			{
+				this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformProperty).Reset();
+				rtTransform = null;
+				skewTransform = null;
+			}
+			else
+			{
+				if (rtTransform == null)
+				{
+					if (!this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformOriginProperty).IsSet)
+					{
+						this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformOriginProperty).SetValue(new Point(0.5, 0.5));
+					}
+					
+					if (this.skewTransform == null)
+						this.skewTransform = new SkewTransform(0, 0);
+					this.ExtendedItem.Properties.GetProperty(FrameworkElement.RenderTransformProperty).SetValue(skewTransform);
+					rtTransform = this.ExtendedItem.Properties[FrameworkElement.RenderTransformProperty].Value;
+				}
+				rtTransform.Properties["AngleY"].SetValue(destAngle);
+			}
+			
+			_adornerLayer.UpdateAdornersForElement(this.ExtendedItem.View, true);
+		}
+		
+		void dragY_Completed(ICSharpCode.WpfDesign.Designer.Controls.DragListener drag)
+		{
+			operation.Commit();
+		}
+		
+		#endregion
+		
+		protected override void OnInitialized()
+		{
+			
+			if (this.ExtendedItem.Component is WindowClone)
+				return;
+			base.OnInitialized();
+			
+			extendedItemArray[0] = this.ExtendedItem;
+			this.ExtendedItem.PropertyChanged += OnPropertyChanged;
+			
+			var designerItem = this.ExtendedItem.Component as FrameworkElement;
+			this.skewTransform = designerItem.RenderTransform as SkewTransform;
+			
+			if (skewTransform != null)
+			{
+				skewX = skewTransform.AngleX;
+				skewY = skewTransform.AngleY;
+			}
+			
+			thumb1 = new Thumb() { Cursor = Cursors.ScrollWE, Height = 14, Width = 4, Opacity = 1 };
+			thumb2 = new Thumb() { Cursor = Cursors.ScrollNS, Width = 14, Height = 4, Opacity = 1 };
+			
+			OnPropertyChanged(null, null);
+			
+			adornerPanel.Children.Add(thumb1);
+			adornerPanel.Children.Add(thumb2);
+			
+			DragListener drag1 = new DragListener(thumb1);
+			drag1.Started += dragX_Started;
+			drag1.Changed += dragX_Changed;
+			drag1.Completed += dragX_Completed;
+			DragListener drag2 = new DragListener(thumb2);
+			drag2.Started += dragY_Started;
+			drag2.Changed += dragY_Changed;
+			drag2.Completed += dragY_Completed;
+		}
+		
+		void OnPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
+		{
+			if (sender == null || e.PropertyName == "Width" || e.PropertyName == "Height") {
+				AdornerPanel.SetPlacement(thumb1,
+					new RelativePlacement(HorizontalAlignment.Center, VerticalAlignment.Top) {
+						YOffset = 0,
+						XOffset = -1 * ((FrameworkElement)ExtendedItem.View).ActualWidth / 4
+					});
+				
+				AdornerPanel.SetPlacement(thumb2,
+					new RelativePlacement(HorizontalAlignment.Left, VerticalAlignment.Center) {
+						YOffset = -1 * ((FrameworkElement)ExtendedItem.View).ActualHeight / 4,
+						XOffset = 0
+					});
+			}
+		}
+		
+		protected override void OnRemove()
+		{
+			this.ExtendedItem.PropertyChanged -= OnPropertyChanged;
+			base.OnRemove();
+		}
+	}
+}

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/SnaplinePlacementBehavior.cs

@@ -41,51 +41,51 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 		List<Snapline> horizontalMap;
 		List<Snapline> verticalMap;
 		double? baseline;
-
+		
 		public const double Accuracy = 5;
 		public const double Margin = 8;
-
+		
 		public override void BeginPlacement(PlacementOperation operation)
 		{
 			base.BeginPlacement(operation);
 			CreateSurface(operation);
 		}
-
+		
 		public override void EndPlacement(PlacementOperation operation)
 		{
 			base.EndPlacement(operation);
 			DeleteSurface();
 		}
-
+		
 		public override void EnterContainer(PlacementOperation operation)
 		{
 			base.EnterContainer(operation);
 			CreateSurface(operation);
 		}
-
+		
 		public override void LeaveContainer(PlacementOperation operation)
 		{
 			base.LeaveContainer(operation);
 			DeleteSurface();
 		}
-
+		
 		public override void BeforeSetPosition(PlacementOperation operation)
 		{
 			base.BeforeSetPosition(operation);
 			if (surface == null) return;
-
+			
 			DesignPanel designPanel = ExtendedItem.Services.DesignPanel as DesignPanel;
 			if (designPanel == null || !designPanel.UseSnaplinePlacement)
 				return;
 			
 			surface.Children.Clear();
 			if (Keyboard.IsKeyDown(Key.LeftCtrl)) return;
-
+			
 			Rect bounds = Rect.Empty;
 			foreach (var item in operation.PlacedItems) {
 				bounds.Union(item.Bounds);
 			}
-
+			
 			var horizontalInput = new List<Snapline>();
 			var verticalInput = new List<Snapline>();
 			var info = operation.PlacedItems[0];
@@ -99,7 +99,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 					horizontalInput.Add(new Snapline() { Group = 1, Offset = textOffset, Start = bounds.Left, End = bounds.Right });
 				}
 			}
-
+			
 			// debug
 			//foreach (var t in horizontalMap.Concat(horizontalInput)) {
 			//    surface.Children.Add(new Line() { X1 = t.Start, X2 = t.End, Y1 = t.Offset, Y2 = t.Offset, Stroke = Brushes.Black });
@@ -108,12 +108,12 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			//    surface.Children.Add(new Line() { X1 = t.Offset, X2 = t.Offset, Y1 = t.Start , Y2 = t.End, Stroke = Brushes.Black });
 			//}
 			//return;
-
+			
 			List<Snapline> drawLines;
 			double delta;
-
+			
 			if (Snap(horizontalInput, horizontalMap, Accuracy, out drawLines, out delta)) {
-
+				
 				if (operation.Type == PlacementType.Resize) {
 					if (info.ResizeThumbAlignment.Vertical == VerticalAlignment.Top) {
 						bounds.Y += delta;
@@ -129,14 +129,14 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 						item.Bounds = r;
 					}
 				}
-
+				
 				foreach (var d in drawLines) {
 					DrawLine(d.Start, d.Offset, d.End, d.Offset);
 				}
 			}
-
+			
 			if (Snap(verticalInput, verticalMap, Accuracy, out drawLines, out delta)) {
-
+				
 				if (operation.Type == PlacementType.Resize) {
 					if (info.ResizeThumbAlignment.Horizontal == HorizontalAlignment.Left) {
 						bounds.X += delta;
@@ -158,52 +158,77 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 				}
 			}
 		}
-
+		
 		void CreateSurface(PlacementOperation operation)
 		{
 			if (ExtendedItem.Services.GetService<IDesignPanel>() != null) {
-
+				
 				surface = new Canvas();
 				adornerPanel = new AdornerPanel();
 				adornerPanel.SetAdornedElement(ExtendedItem.View, ExtendedItem);
 				AdornerPanel.SetPlacement(surface, AdornerPlacement.FillContent);
 				adornerPanel.Children.Add(surface);
 				ExtendedItem.Services.DesignPanel.Adorners.Add(adornerPanel);
-
+				
 				BuildMaps(operation);
-
+				
 				if (operation.Type != PlacementType.Resize && operation.PlacedItems.Count == 1) {
 					baseline = GetBaseline(operation.PlacedItems[0].Item.View);
 				}
 			}
 		}
-
+		
+		private IEnumerable<DesignItem> AllDesignItems(DesignItem designItem = null)
+		{
+			if (designItem == null)
+			{
+				designItem = this.ExtendedItem.Services.DesignPanel.Context.RootItem;
+				yield return designItem;
+				if (designItem.ContentProperty.Value != null) {
+					yield return designItem.ContentProperty.Value;
+					designItem = designItem.ContentProperty.Value;
+				}
+			}
+			
+			if (designItem.ContentProperty != null && designItem.ContentProperty.IsCollection)
+				foreach (var collectionElement in designItem.ContentProperty.CollectionElements)
+				{
+					yield return collectionElement;
+					
+					foreach (var el in AllDesignItems(collectionElement))
+					{
+						yield return el;
+					}
+				}
+		}
+				
 		void BuildMaps(PlacementOperation operation)
 		{
 			horizontalMap = new List<Snapline>();
 			verticalMap = new List<Snapline>();
-
+			
 			var containerRect = new Rect(0, 0, ModelTools.GetWidth(ExtendedItem.View), ModelTools.GetHeight(ExtendedItem.View));
 			AddLines(containerRect, -Margin, false);
-
+			
 			AddLines(containerRect, 0, false);
 			
-			foreach (var item in ExtendedItem.ContentProperty.CollectionElements
-			         .Except(operation.PlacedItems.Select(f => f.Item)))
-			{
-				var bounds = GetPosition(operation, item);
-
-				AddLines(bounds, 0, false);
-				AddLines(bounds, Margin, true);
-				AddBaseline(item, bounds, horizontalMap);
+			foreach (var item in AllDesignItems() /* ExtendedItem.ContentProperty.CollectionElements */
+				.Except(operation.PlacedItems.Select(f => f.Item))) {
+				if (item != null) {
+					var bounds = GetPosition(operation, item);
+				
+					AddLines(bounds, 0, false);
+					AddLines(bounds, Margin, true);
+					AddBaseline(item, bounds, horizontalMap);
+				}
 			}
 		}
-
+		
 		void AddLines(Rect r, double inflate, bool requireOverlap)
 		{
 			AddLines(r, inflate, requireOverlap, horizontalMap, verticalMap, null);
 		}
-
+		
 		void AddLines(Rect r, double inflate, bool requireOverlap, List<Snapline> h, List<Snapline> v, PlacementAlignment? filter)
 		{
 			Rect r2 = r;
@@ -217,8 +242,14 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 				v.Add(new Snapline() { RequireOverlap = requireOverlap, Offset = r2.Left - 1, Start = r.Top, End = r.Bottom });
 			if (filter == null || filter.Value.Horizontal == HorizontalAlignment.Right)
 				v.Add(new Snapline() { RequireOverlap = requireOverlap, Offset = r2.Right - 1, Start = r.Top, End = r.Bottom });
+			
+			if (filter == null)
+			{
+				h.Add(new Snapline() { RequireOverlap = requireOverlap, Offset = r2.Top + Math.Abs((r2.Top - r2.Bottom) / 2), Start = r.Left, End = r.Right });
+				v.Add(new Snapline() { RequireOverlap = requireOverlap, Offset = r2.Left + Math.Abs((r2.Left - r2.Right) / 2), Start = r.Top, End = r.Bottom });
+			}
 		}
-
+		
 		void AddBaseline(DesignItem item, Rect bounds, List<Snapline> list)
 		{
 			var baseline = GetBaseline(item.View);
@@ -227,7 +258,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 				list.Add(new Snapline() { Group = 1, Offset = textOffset, Start = bounds.Left, End = bounds.Right });
 			}
 		}
-
+		
 		void DeleteSurface()
 		{
 			if (surface != null) {
@@ -238,7 +269,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 				verticalMap = null;
 			}
 		}
-
+		
 		void DrawLine(double x1, double y1, double x2, double y2)
 		{
 			var line1 = new Line() {
@@ -250,7 +281,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 				Stroke = Brushes.White
 			};
 			surface.Children.Add(line1);
-
+			
 			var line2 = new Line() {
 				X1 = x1,
 				Y1 = y1,
@@ -263,7 +294,7 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			};
 			surface.Children.Add(line2);
 		}
-
+		
 		//TODO: GlyphRun must be used
 		static double? GetBaseline(UIElement element) {
 			var textBox = element as TextBox;
@@ -274,21 +305,21 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			var textBlock = element as TextBlock;
 			if (textBlock != null)
 				return textBlock.TranslatePoint(new Point(0, textBlock.ActualHeight), element).Y;
-
+			
 			return null;
 		}
-
+		
 		static bool Snap(List<Snapline> input, List<Snapline> map, double accuracy,
-		                 out List<Snapline> drawLines, out double delta)
+			out List<Snapline> drawLines, out double delta)
 		{
 			delta = double.MaxValue;
 			drawLines = null;
-
+			
 			foreach (var inputLine in input) {
 				foreach (var mapLine in map) {
 					if (Math.Abs(mapLine.Offset - inputLine.Offset) <= accuracy) {
 						if (!inputLine.RequireOverlap && !mapLine.RequireOverlap ||
-						    Math.Max(inputLine.Start, mapLine.Start) < Math.Min(inputLine.End, mapLine.End))
+							Math.Max(inputLine.Start, mapLine.Start) < Math.Min(inputLine.End, mapLine.End))
 						{
 							if (mapLine.Group == inputLine.Group)
 								delta = mapLine.Offset - inputLine.Offset;
@@ -296,10 +327,10 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 					}
 				}
 			}
-
+			
 			if (delta == double.MaxValue) return false;
 			var offsetDict = new Dictionary<double, Snapline>();
-
+			
 			foreach (var inputLine in input) {
 				inputLine.Offset += delta;
 				foreach (var mapLine in map) {
@@ -318,11 +349,11 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 					}
 				}
 			}
-
+			
 			drawLines = offsetDict.Values.ToList();
 			return true;
 		}
-
+		
 		[DebuggerDisplay("Snapline: {Offset}")]
 		class Snapline
 		{

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/TopLeftContainerDragHandle.cs

@@ -32,16 +32,10 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 {
 	
 	/// <summary>
-	/// The drag handle displayed for panels.
+	/// The drag handle displayed for Framework Elements
 	/// </summary>
-	[ExtensionServer(typeof(PrimarySelectionExtensionServer))]
-	[ExtensionFor(typeof(Panel))]
-	[ExtensionFor(typeof(Image))]
-	[ExtensionFor(typeof(MediaElement))]
-	[ExtensionFor(typeof(ItemsControl))]
-	[ExtensionFor(typeof(Border))]
-	[ExtensionFor(typeof(Viewbox))]
-	[ExtensionFor(typeof(ContentControl))]
+	[ExtensionServer(typeof(OnlyOneItemSelectedExtensionServer))]
+	[ExtensionFor(typeof(FrameworkElement))]
 	public class TopLeftContainerDragHandle : AdornerProvider
 	{
 		/// <summary/>
@@ -50,9 +44,9 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			ContainerDragHandle rect = new ContainerDragHandle();
 			
 			rect.PreviewMouseDown += delegate(object sender, MouseButtonEventArgs e) {
-				Services.Selection.SetSelectedComponents(new DesignItem[] { this.ExtendedItem }, SelectionTypes.Auto);
+				//Services.Selection.SetSelectedComponents(new DesignItem[] { this.ExtendedItem }, SelectionTypes.Auto);
 				new DragMoveMouseGesture(this.ExtendedItem, false).Start(this.ExtendedItem.Services.DesignPanel,e);
-				e.Handled=true;                                                  
+				e.Handled=true;
 			};
 			
 			RelativePlacement p = new RelativePlacement(HorizontalAlignment.Left, VerticalAlignment.Top);

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/Extensions/TopLeftContainerDragHandleMultipleItems.cs

@@ -0,0 +1,93 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.Windows.Controls;
+using System.Windows;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Shapes;
+using ICSharpCode.WpfDesign.Adorners;
+using ICSharpCode.WpfDesign.Extensions;
+
+using ICSharpCode.WpfDesign.Designer.Services;
+using ICSharpCode.WpfDesign.Designer.Controls;
+
+namespace ICSharpCode.WpfDesign.Designer.Extensions
+{
+	
+	/// <summary>
+	/// The drag handle displayed for Framework Elements
+	/// </summary>
+	[ExtensionServer(typeof(PrimarySelectionButOnlyWhenMultipleSelectedExtensionServer))]
+	[ExtensionFor(typeof(FrameworkElement))]
+	public class TopLeftContainerDragHandleMultipleItems : AdornerProvider
+	{
+		/// <summary/>
+		public TopLeftContainerDragHandleMultipleItems()
+		{ }
+		
+		protected override void OnInitialized()
+		{
+			base.OnInitialized();
+			
+			ContainerDragHandle rect = new ContainerDragHandle();
+			
+			rect.PreviewMouseDown += delegate(object sender, MouseButtonEventArgs e) {
+				//Services.Selection.SetSelectedComponents(new DesignItem[] { this.ExtendedItem }, SelectionTypes.Auto);
+				new DragMoveMouseGesture(this.ExtendedItem, false).Start(this.ExtendedItem.Services.DesignPanel,e);
+				e.Handled=true;
+			};
+			
+			var items = this.ExtendedItem.Services.Selection.SelectedItems;
+			
+			double minX = 0;
+			double minY = 0;
+			double maxX = 0;
+			double maxY = 0;
+			
+			foreach (DesignItem di in items) {
+				Point relativeLocation = di.View.TranslatePoint(new Point(0, 0), this.ExtendedItem.View);
+				
+				minX = minX < relativeLocation.X ? minX : relativeLocation.X;
+				minY = minY < relativeLocation.Y ? minY : relativeLocation.Y;
+				maxX = maxX > relativeLocation.X + ((FrameworkElement)this.ExtendedItem.View).ActualWidth ? maxX : relativeLocation.X + ((FrameworkElement)this.ExtendedItem.View).ActualWidth;
+				maxY = maxY > relativeLocation.Y + ((FrameworkElement)this.ExtendedItem.View).ActualHeight ? maxY : relativeLocation.Y + ((FrameworkElement)this.ExtendedItem.View).ActualHeight;
+			}
+			
+			Rectangle rect2 = new Rectangle() {
+				Width = (maxX - minX) + 4,
+				Height = (maxY - minY) + 4,
+				Stroke = Brushes.Black,
+				StrokeThickness = 2,
+				StrokeDashArray = new DoubleCollection(){ 2, 2 },
+			};
+			
+			RelativePlacement p = new RelativePlacement(HorizontalAlignment.Left, VerticalAlignment.Top);
+			p.XOffset = minX - 3;
+			p.YOffset = minY - 3;
+			
+			RelativePlacement p2 = new RelativePlacement(HorizontalAlignment.Left, VerticalAlignment.Top);
+			p2.XOffset = (minX + rect2.Width) - 2;
+			p2.YOffset = (minY + rect2.Height) - 2;
+						
+			AddAdorner(p, AdornerOrder.Background, rect);
+			AddAdorner(p2, AdornerOrder.Background, rect2);
+		}
+	}	
+}

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/OutlineView/DragTreeViewItem.cs

@@ -94,8 +94,8 @@ namespace ICSharpCode.WpfDesign.Designer.OutlineView
 		
 		public static void OnIsSelectedChanged(DependencyObject s, DependencyPropertyChangedEventArgs e)
 		{
-			var el = s as FrameworkElement;
-			if (el != null)
+			var el = s as DragTreeViewItem;
+			if (el != null && el.IsSelected)
 				el.BringIntoView();
 		}
 

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/WpfDesign.Designer.csproj

@@ -87,6 +87,8 @@
     </Compile>
     <Compile Include="Extensions\RenderTransformOriginExtension.cs" />
     <Compile Include="Extensions\RightClickContextMenuExtension.cs" />
+    <Compile Include="Extensions\SkewThumbExtension.cs" />
+    <Compile Include="Extensions\TopLeftContainerDragHandleMultipleItems.cs" />
     <Compile Include="PropertyGrid\Editors\FlatCollectionEditor.xaml.cs">
       <DependentUpon>FlatCollectionEditor.xaml</DependentUpon>
       <SubType>Code</SubType>

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Adorners/AdornerPanel.cs

@@ -179,6 +179,11 @@ namespace ICSharpCode.WpfDesign.Adorners
 		/// </summary>
 		public static readonly AdornerOrder Foreground = new AdornerOrder(300);
 		
+		/// <summary>
+		/// The adorner is in the before foreground layer.
+		/// </summary>
+		public static readonly AdornerOrder BeforeForeground = new AdornerOrder(400);
+	
 		int i;
 		
 		internal AdornerOrder(int i)

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Extensions/SelectionExtensionServer.cs

@@ -102,6 +102,63 @@ namespace ICSharpCode.WpfDesign.Extensions
 		}
 	}
 	
+	/// <summary>
+	/// Applies an extension to the primary selection, but only when multiple Items are selected!
+	/// </summary>
+	public class PrimarySelectionButOnlyWhenMultipleSelectedExtensionServer : PrimarySelectionExtensionServer
+	{
+		/// <summary>
+		/// Is called after the extension server is initialized and the Context property has been set.
+		/// </summary>
+		protected override void OnInitialized()
+		{
+			base.OnInitialized();
+			this.Services.Selection.SelectionChanged += OnSelectionChanged;
+		}
+		
+		void OnSelectionChanged(object sender, EventArgs e)
+		{
+			ReapplyExtensions(this.Services.Selection.SelectedItems);			
+		}
+		
+		/// <summary>
+		/// Gets if the item is in the secondary selection.
+		/// </summary>
+		public override bool ShouldApplyExtensions(DesignItem extendedItem)
+		{
+			return Services.Selection.PrimarySelection == extendedItem && Services.Selection.SelectionCount > 1;
+		}
+	}
+	
+	/// <summary>
+	/// Applies an extension to the primary selection if Only One Item is Selected.
+	/// </summary>
+	public class OnlyOneItemSelectedExtensionServer : PrimarySelectionExtensionServer
+	{
+		/// <summary>
+		/// Is called after the extension server is initialized and the Context property has been set.
+		/// </summary>
+		protected override void OnInitialized()
+		{
+			base.OnInitialized();
+			this.Services.Selection.SelectionChanged += OnSelectionChanged;
+		}
+		
+		void OnSelectionChanged(object sender, EventArgs e)
+		{
+			if (this.Services.Selection.SelectedItems.Count > 1)
+				ReapplyExtensions(this.Services.Selection.SelectedItems);
+		}
+		
+		/// <summary>
+		/// Gets if the item is the primary selection.
+		/// </summary>
+		public override bool ShouldApplyExtensions(DesignItem extendedItem)
+		{
+			return Services.Selection.PrimarySelection == extendedItem && Services.Selection.SelectionCount < 2;
+		}
+	}
+	
 	/// <summary>
 	/// Applies an extension to the parent of the primary selection.
 	/// </summary>