More work on adorners.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@2228 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

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

@@ -89,12 +89,31 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 		AdornerPanelCollection _adorners;
 		readonly UIElement _designPanel;
 		
+		#if DEBUG
+		int _totalAdornerCount;
+		#endif
+		
+		
 		internal AdornerLayer(UIElement designPanel)
 		{
 			this._designPanel = designPanel;
 			
+			this.LayoutUpdated += OnLayoutUpdated;
+			
 			_adorners = new AdornerPanelCollection(this);
-			ClearAdorners();
+		}
+		
+		void OnLayoutUpdated(object sender, EventArgs e)
+		{
+			UpdateAllAdorners(false);
+//			Debug.WriteLine("Adorner LayoutUpdated. AdornedElements=" + _dict.Count +
+//			                ", visible adorners=" + VisualChildrenCount + ", total adorners=" + (_totalAdornerCount));
+		}
+		
+		protected override void OnRenderSizeChanged(SizeChangedInfo sizeInfo)
+		{
+			base.OnRenderSizeChanged(sizeInfo);
+			UpdateAllAdorners(true);
 		}
 		
 		internal AdornerPanelCollection Adorners {
@@ -106,22 +125,32 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 		sealed class AdornerInfo
 		{
 			internal readonly List<AdornerPanel> adorners = new List<AdornerPanel>();
+			internal bool isVisible;
 		}
 		
 		// adorned element => AdornerInfo
-		Dictionary<UIElement, AdornerInfo> _dict;
+		Dictionary<UIElement, AdornerInfo> _dict = new Dictionary<UIElement, AdornerInfo>();
 		
 		void ClearAdorners()
 		{
+			if (_dict.Count == 0)
+				return; // already empty
+			
 			this.Children.Clear();
 			_dict = new Dictionary<UIElement, AdornerInfo>();
+			
+			#if DEBUG
+			_totalAdornerCount = 0;
+			Debug.WriteLine("AdornerLayer cleared.");
+			#endif
 		}
 		
-		AdornerInfo GetAdornerInfo(UIElement adornedElement)
+		AdornerInfo GetOrCreateAdornerInfo(UIElement adornedElement)
 		{
 			AdornerInfo info;
 			if (!_dict.TryGetValue(adornedElement, out info)) {
 				info = _dict[adornedElement] = new AdornerInfo();
+				info.isVisible = adornedElement.IsDescendantOf(_designPanel);
 			}
 			return info;
 		}
@@ -138,8 +167,19 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 			if (adornerPanel.AdornedElement == null)
 				throw new DesignerException("adornerPanel.AdornedElement must be set");
 			
-			GetAdornerInfo(adornerPanel.AdornedElement).adorners.Add(adornerPanel);
+			AdornerInfo info = GetOrCreateAdornerInfo(adornerPanel.AdornedElement);
+			info.adorners.Add(adornerPanel);
+			
+			if (info.isVisible) {
+				AddAdornerToChildren(adornerPanel);
+			}
+			
+			Debug.WriteLine("Adorner added. AdornedElements=" + _dict.Count +
+			                ", visible adorners=" + VisualChildrenCount + ", total adorners=" + (++_totalAdornerCount));
+		}
 		
+		void AddAdornerToChildren(AdornerPanel adornerPanel)
+		{
 			UIElementCollection children = this.Children;
 			int i = 0;
 			for (i = 0; i < children.Count; i++) {
@@ -149,8 +189,6 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 				}
 			}
 			children.Insert(i, adornerPanel);
-			
-			this.InvalidateMeasure();
 		}
 		
 		protected override Size MeasureOverride(Size availableSize)
@@ -166,7 +204,9 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 		{
 			foreach (AdornerPanel adorner in this.Children) {
 				adorner.Arrange(new Rect(new Point(0, 0), adorner.DesiredSize));
-				adorner.RenderTransform = (Transform)adorner.AdornedElement.TransformToAncestor(_designPanel);
+				if (adorner.AdornedElement.IsDescendantOf(_designPanel)) {
+					adorner.RenderTransform = (Transform)adorner.AdornedElement.TransformToAncestor(_designPanel);
+				}
 			}
 			return finalSize;
 		}
@@ -181,11 +221,58 @@ namespace ICSharpCode.WpfDesign.Designer.Controls
 				return false;
 			
 			if (info.adorners.Remove(adornerPanel)) {
-				this.Children.Remove(adornerPanel);
+				if (info.isVisible) {
+					this.Children.Remove(adornerPanel);
+				}
+				
+				if (info.adorners.Count == 0) {
+					_dict.Remove(adornerPanel.AdornedElement);
+				}
+				
+				Debug.WriteLine("Adorner removed. AdornedElements=" + _dict.Count +
+				                ", visible adorners=" + VisualChildrenCount + ", total adorners=" + (--_totalAdornerCount));
+				
 				return true;
 			} else {
 				return false;
 			}
 		}
+		
+		public void UpdateAdornersForElement(UIElement element, bool forceInvalidate)
+		{
+			AdornerInfo info = GetExistingAdornerInfo(element);
+			if (info != null) {
+				UpdateAdornersForElement(element, info, forceInvalidate);
+			}
+		}
+		
+		void UpdateAdornersForElement(UIElement element, AdornerInfo info, bool forceInvalidate)
+		{
+			if (element.IsDescendantOf(_designPanel)) {
+				if (!info.isVisible) {
+					info.isVisible = true;
+					// make adorners visible:
+					info.adorners.ForEach(AddAdornerToChildren);
+				}
+				if (forceInvalidate) {
+					foreach (AdornerPanel p in info.adorners) {
+						p.InvalidateMeasure();
+					}
+				}
+			} else {
+				if (info.isVisible) {
+					info.isVisible = false;
+					// make adorners invisible:
+					info.adorners.ForEach(this.Children.Remove);
+				}
+			}
+		}
+		
+		void UpdateAllAdorners(bool forceInvalidate)
+		{
+			foreach (KeyValuePair<UIElement, AdornerInfo> pair in _dict) {
+				UpdateAdornersForElement(pair.Key, pair.Value, forceInvalidate);
+			}
+		}
 	}
 }

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/DesignPanel.cs

@@ -37,8 +37,9 @@ namespace ICSharpCode.WpfDesign.Designer
 		}
 		
 		DesignContext _context;
-		EatAllHitTestRequests _eatAllHitTestRequests;
-		AdornerLayer _adornerLayer;
+		readonly EatAllHitTestRequests _eatAllHitTestRequests;
+		readonly AdornerLayer _adornerLayer;
+		readonly Canvas _markerCanvas;
 		
 		public DesignPanel()
 		{
@@ -46,6 +47,8 @@ namespace ICSharpCode.WpfDesign.Designer
 			_eatAllHitTestRequests = new EatAllHitTestRequests();
 			_eatAllHitTestRequests.IsHitTestVisible = false;
 			_adornerLayer = new AdornerLayer(this);
+			_markerCanvas = new Canvas();
+			_markerCanvas.IsHitTestVisible = false;
 		}
 		
 		#region Visual Child Management
@@ -60,10 +63,12 @@ namespace ICSharpCode.WpfDesign.Designer
 					// remove _adornerLayer and _eatAllHitTestRequests
 					RemoveVisualChild(_adornerLayer);
 					RemoveVisualChild(_eatAllHitTestRequests);
+					RemoveVisualChild(_markerCanvas);
 				} else if (base.Child == null) {
 					// Child is being set from null to some value
 					AddVisualChild(_adornerLayer);
 					AddVisualChild(_eatAllHitTestRequests);
+					AddVisualChild(_markerCanvas);
 				}
 				base.Child = value;
 			}
@@ -78,6 +83,8 @@ namespace ICSharpCode.WpfDesign.Designer
 					return _eatAllHitTestRequests;
 				else if (index == 2)
 					return _adornerLayer;
+				else if (index == 3)
+					return _markerCanvas;
 			}
 			return base.GetVisualChild(index);
 		}
@@ -85,7 +92,7 @@ namespace ICSharpCode.WpfDesign.Designer
 		protected override int VisualChildrenCount {
 			get {
 				if (base.Child != null)
-					return 3;
+					return 4;
 				else
 					return base.VisualChildrenCount;
 			}
@@ -97,6 +104,7 @@ namespace ICSharpCode.WpfDesign.Designer
 			if (this.Child != null) {
 				_adornerLayer.Measure(constraint);
 				_eatAllHitTestRequests.Measure(constraint);
+				_markerCanvas.Measure(constraint);
 			}
 			return result;
 		}
@@ -105,8 +113,10 @@ namespace ICSharpCode.WpfDesign.Designer
 		{
 			Size result = base.ArrangeOverride(arrangeSize);
 			if (this.Child != null) {
-				_adornerLayer.Arrange(new Rect(new Point(0, 0), arrangeSize));
-				_eatAllHitTestRequests.Arrange(new Rect(new Point(0, 0), arrangeSize));
+				Rect r = new Rect(new Point(0, 0), arrangeSize);
+				_adornerLayer.Arrange(r);
+				_eatAllHitTestRequests.Arrange(r);
+				_markerCanvas.Arrange(r);
 			}
 			return result;
 		}
@@ -197,6 +207,10 @@ namespace ICSharpCode.WpfDesign.Designer
 				return _adornerLayer.Adorners;
 			}
 		}
+		
+		public Canvas MarkerCanvas {
+			get { return _markerCanvas; }
+		}
 	}
 	
 	internal delegate void Action();

src/AddIns/DisplayBindings/WpfDesign/WpfDesign.Designer/Project/DesignSurface.cs

@@ -86,6 +86,7 @@ namespace ICSharpCode.WpfDesign.Designer
 			_designContext = null;
 			_designPanel.Context = null;
 			_designPanel.Child = null;
+			_designPanel.Adorners.Clear();
 		}
 	}
 }

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

@@ -33,9 +33,14 @@ namespace ICSharpCode.WpfDesign.Designer.Extensions
 			r.StrokeDashArray = new DoubleCollection(new double[] { 0, 2 });
 			r.IsHitTestVisible = false;
 			
-			Placement placement = new Placement();
+			RelativePlacement placement = new RelativePlacement();
 			placement.WidthRelativeToContentWidth = 1;
 			placement.HeightRelativeToContentHeight = 1;
+			placement.WidthOffset = 2;
+			placement.HeightOffset = 2;
+			
+			placement.XOffset = -1;
+			placement.YOffset = -1;
 			
 			this.AddAdorner(r, placement);
 		}

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

@@ -24,45 +24,56 @@ namespace ICSharpCode.WpfDesign.Adorners
 		/// </summary>
 		public static readonly DependencyProperty PlacementProperty = DependencyProperty.RegisterAttached(
 			"Placement", typeof(Placement), typeof(AdornerPanel),
-			new FrameworkPropertyMetadata(new Placement(), FrameworkPropertyMetadataOptions.AffectsParentMeasure)
+			new FrameworkPropertyMetadata(Placement.FillContent, FrameworkPropertyMetadataOptions.AffectsParentMeasure)
 		);
 		
 		/// <summary>
-		/// Gets the placement of the specified adorner visual.
+		/// Gets the placement of the specified adorner.
 		/// </summary>
-		public static Placement GetPlacement(Visual visual)
+		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
+		public static Placement GetPlacement(UIElement adorner)
 		{
-			if (visual == null)
-				throw new ArgumentNullException("visual");
-			return (Placement)visual.GetValue(PlacementProperty);
+			if (adorner == null)
+				throw new ArgumentNullException("adorner");
+			return (Placement)adorner.GetValue(PlacementProperty);
 		}
 		
 		/// <summary>
-		/// Sets the placement of the specified adorner visual.
+		/// Sets the placement of the specified adorner.
 		/// </summary>
-		public static void SetPlacement(Visual visual, Placement placement)
+		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
+		public static void SetPlacement(UIElement adorner, Placement placement)
 		{
-			if (visual == null)
-				throw new ArgumentNullException("visual");
+			if (adorner == null)
+				throw new ArgumentNullException("adorner");
 			if (placement == null)
 				throw new ArgumentNullException("placement");
-			visual.SetValue(PlacementProperty, placement);
+			adorner.SetValue(PlacementProperty, placement);
 		}
 		#endregion
 		
 		UIElement _adornedElement;
 		AdornerOrder _Order = AdornerOrder.Content;
 		
+		/// <summary>
+		/// Gets/Sets the element adorned by this AdornerPanel.
+		/// Do not change this property after the panel was added to an AdornerLayer!
+		/// </summary>
 		public UIElement AdornedElement {
 			get { return _adornedElement; }
 			set { _adornedElement = value; }
 		}
 		
+		/// <summary>
+		/// Gets/Sets the order used to display the AdornerPanel relative to other AdornerPanels.
+		/// Do not change this property after the panel was added to an AdornerLayer!
+		/// </summary>
 		public AdornerOrder Order {
 			get { return _Order; }
 			set { _Order = value; }
 		}
 		
+		/// <summary/>
 		protected override Size MeasureOverride(Size availableSize)
 		{
 			if (this.AdornedElement != null) {
@@ -78,37 +89,57 @@ namespace ICSharpCode.WpfDesign.Adorners
 			}
 		}
 		
+		/// <summary/>
 		protected override Size ArrangeOverride(Size finalSize)
 		{
 			foreach (UIElement element in base.InternalChildren) {
-				element.Arrange(new Rect(finalSize));
+				GetPlacement(element).Arrange(this, element, finalSize);
 			}
 			return finalSize;
 		}
 		
-		private IEnumerable<DependencyObject> VisualChildren {
+		private DependencyObject[] VisualChildren {
 			get {
 				int count = VisualTreeHelper.GetChildrenCount(this);
-				for (int i = 0; i < count; i++) {
-					yield return VisualTreeHelper.GetChild(this, i);
+				DependencyObject[] children = new DependencyObject[count];
+				for (int i = 0; i < children.Length; i++) {
+					children[i] = VisualTreeHelper.GetChild(this, i);
 				}
+				return children;
 			}
 		}
 	}
 	
+	/// <summary>
+	/// Describes where an Adorner is positioned on the Z-Layer.
+	/// </summary>
 	public struct AdornerOrder : IComparable<AdornerOrder>
 	{
+		/// <summary>
+		/// The adorner is in the background layer.
+		/// </summary>
 		public static readonly AdornerOrder Background = new AdornerOrder(100);
+		
+		/// <summary>
+		/// The adorner is in the content layer.
+		/// </summary>
 		public static readonly AdornerOrder Content = new AdornerOrder(200);
+		
+		/// <summary>
+		/// The adorner is in the foreground layer.
+		/// </summary>
 		public static readonly AdornerOrder Foreground = new AdornerOrder(300);
 		
 		int i;
 		
-		public AdornerOrder(int i)
+		internal AdornerOrder(int i)
 		{
 			this.i = i;
 		}
 		
+		/// <summary>
+		/// Compares the <see cref="AdornerOrder"/> to another AdornerOrder.
+		/// </summary>
 		public int CompareTo(AdornerOrder other)
 		{
 			return i.CompareTo(other.i);

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

@@ -75,7 +75,7 @@ namespace ICSharpCode.WpfDesign.Adorners
 		/// <summary>
 		/// Creates a new AdornerProvider instance.
 		/// </summary>
-		public AdornerProvider()
+		protected AdornerProvider()
 		{
 			_adorners = new AdornerPanelCollection(this);
 		}

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

@@ -18,18 +18,33 @@ namespace ICSharpCode.WpfDesign.Adorners
 	/// <summary>
 	/// Defines how a design-time adorner is placed.
 	/// </summary>
-	public class Placement
+	public abstract class Placement
 	{
-		PlacementSpace space = PlacementSpace.Render;
+		/// <summary>
+		/// A placement instance that places the adorner above the content, using the same bounds as the content.
+		/// </summary>
+		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
+		public static readonly Placement FillContent = new FillContentPlacement();
 		
 		/// <summary>
-		/// Gets/Sets the space in which the adorner is placed.
+		/// Arranges the adorner element on the specified adorner panel.
 		/// </summary>
-		public PlacementSpace Space {
-			get { return space; }
-			set { space = value; }
+		public abstract void Arrange(AdornerPanel panel, UIElement adorner, Size adornedElementSize);
+		
+		sealed class FillContentPlacement : Placement
+		{
+			public override void Arrange(AdornerPanel panel, UIElement adorner, Size adornedElementSize)
+			{
+				adorner.Arrange(new Rect(adornedElementSize));
+			}
 		}
+	}
 	
+	/// <summary>
+	/// Placement class providing properties for different kinds of relative placements.
+	/// </summary>
+	public sealed class RelativePlacement : Placement
+	{
 		double widthRelativeToDesiredWidth, heightRelativeToDesiredHeight;
 		
 		/// <summary>
@@ -84,21 +99,49 @@ namespace ICSharpCode.WpfDesign.Adorners
 			set { heightOffset = value; }
 		}
 		
-		Size CalculateSize(Visual adornerVisual, UIElement adornedElement)
+		Size CalculateSize(UIElement adorner, Size adornedElementSize)
 		{
 			Size size = new Size(widthOffset, heightOffset);
 			if (widthRelativeToDesiredWidth != 0 || heightRelativeToDesiredHeight != 0) {
-				UIElement adornerElement = adornerVisual as UIElement;
-				if (adornerElement == null) {
-					throw new DesignerException("Cannot calculate the size relative to the adorner's desired size if the adorner is not an UIElement.");
-				}
-				size.Width += widthRelativeToDesiredWidth * adornerElement.DesiredSize.Width;
-				size.Height += heightRelativeToDesiredHeight * adornerElement.DesiredSize.Height;
+				size.Width += widthRelativeToDesiredWidth * adorner.DesiredSize.Width;
+				size.Height += heightRelativeToDesiredHeight * adorner.DesiredSize.Height;
 			}
-			size.Width += widthRelativeToContentWidth * adornedElement.RenderSize.Width;
-			size.Height += heightRelativeToContentHeight * adornedElement.RenderSize.Height;
+			size.Width += widthRelativeToContentWidth * adornedElementSize.Width;
+			size.Height += heightRelativeToContentHeight * adornedElementSize.Height;
 			return size;
 		}
+		
+		double xOffset, yOffset;
+		
+		/// <summary>
+		/// Gets/Sets an offset that is added to the adorner position.
+		/// </summary>
+		public double XOffset {
+			get { return xOffset; }
+			set { xOffset = value; }
+		}
+		
+		/// <summary>
+		/// Gets/Sets an offset that is added to the adorner position.
+		/// </summary>
+		public double YOffset {
+			get { return yOffset; }
+			set { yOffset = value; }
+		}
+		
+		Point CalculatePosition(Size adornedElementSize, Size adornerSize)
+		{
+			return new Point(xOffset, yOffset);
+		}
+		
+		/// <summary>
+		/// Arranges the adorner element on the specified adorner panel.
+		/// </summary>
+		public override void Arrange(AdornerPanel panel, UIElement adorner, Size adornedElementSize)
+		{
+			Size adornerSize = CalculateSize(adorner, adornedElementSize);
+			adorner.Arrange(new Rect(CalculatePosition(adornedElementSize, adornerSize), adornerSize));
+		}
 	}
 
 	/// <summary>

src/AddIns/DisplayBindings/WpfDesign/WpfDesign/Project/Tools.cs

@@ -125,6 +125,14 @@ namespace ICSharpCode.WpfDesign
 		/// </summary>
 		ICollection<AdornerPanel> Adorners { get; }
 		
+		/*
+		/// <summary>
+		/// A canvas that is on top of the design surface and all adorners.
+		/// Used for temporary drawings that are not attached to any element, e.g. the selection frame.
+		/// </summary>
+		Canvas MarkerCanvas { get; }
+		*/
+		
 		// The following members were missing in <see cref="IInputElement"/>, but of course
 		// are supported on the DesignPanel: