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Src/Xceed.Wpf.AvalonDock/Controls/DropTarget.cs

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+/*************************************************************************************
+
+   Extended WPF Toolkit
+
+   Copyright (C) 2007-2013 Xceed Software Inc.
+
+   This program is provided to you under the terms of the Microsoft Public
+   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 
+
+   For more features, controls, and fast professional support,
+   pick up the Plus Edition at http://xceed.com/wpf_toolkit
+
+   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids
+
+  ***********************************************************************************/
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Media;
+using Xceed.Wpf.AvalonDock.Layout;
+using System.Windows.Threading;
+
+namespace Xceed.Wpf.AvalonDock.Controls
+{
+    internal abstract class DropTarget<T> : DropTargetBase, IDropTarget where T : FrameworkElement
+    {
+        protected DropTarget(T targetElement, Rect detectionRect, DropTargetType type)
+        {
+            _targetElement = targetElement;
+            _detectionRect = new Rect[] { detectionRect };
+            _type = type;
+        }
+
+        protected DropTarget(T targetElement, IEnumerable<Rect> detectionRects, DropTargetType type)
+        {
+            _targetElement = targetElement;
+            _detectionRect = detectionRects.ToArray();
+            _type = type;
+        }
+
+        Rect[] _detectionRect;
+
+        public Rect[] DetectionRects
+        {
+            get { return _detectionRect; }
+        }
+
+
+        T _targetElement;
+        public T TargetElement
+        {
+            get { return _targetElement; }
+        }
+
+        DropTargetType _type;
+
+        public DropTargetType Type
+        {
+            get { return _type; }
+        }
+
+        protected virtual void Drop(LayoutAnchorableFloatingWindow floatingWindow)
+        { }
+
+        protected virtual void Drop(LayoutDocumentFloatingWindow floatingWindow)
+        { }
+
+
+        public void Drop(LayoutFloatingWindow floatingWindow)
+        {
+            var root = floatingWindow.Root;
+            var currentActiveContent = floatingWindow.Root.ActiveContent;
+            var fwAsAnchorable = floatingWindow as LayoutAnchorableFloatingWindow;
+
+            if (fwAsAnchorable != null)
+            {
+                this.Drop(fwAsAnchorable);
+            }
+            else
+            {
+                var fwAsDocument = floatingWindow as LayoutDocumentFloatingWindow;
+                this.Drop(fwAsDocument);
+            }
+
+            Dispatcher.BeginInvoke(new Action(() =>
+                {
+                    currentActiveContent.IsSelected = false;
+                    currentActiveContent.IsActive = false;
+                    currentActiveContent.IsActive = true;
+                }), DispatcherPriority.Background);
+        }
+
+        public virtual bool HitTest(Point dragPoint)
+        {
+            return _detectionRect.Any(dr => dr.Contains(dragPoint));
+        }
+
+        public abstract Geometry GetPreviewPath(OverlayWindow overlayWindow, LayoutFloatingWindow floatingWindow);
+
+
+
+        public void DragEnter()
+        {
+            SetIsDraggingOver(TargetElement, true);
+        }
+
+        public void DragLeave()
+        {
+            SetIsDraggingOver(TargetElement, false);
+        }
+    }
+}