Version 4.4.0: Fixed MapPolyline performance on UWP. Added MapPolygon and MapMultiPolygon for WPF.

MapControl/WPF/MapMultiPolygon.WPF.cs

@@ -0,0 +1,51 @@
+// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
+// © 2018 Clemens Fischer
+// Licensed under the Microsoft Public License (Ms-PL)
+
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows;
+using System.Windows.Media;
+
+namespace MapControl
+{
+    /// <summary>
+    /// A multi-polygon defined by a collection of collections of Locations.
+    /// With a FillRule of EvenOdd, this allows to draw polygons with holes.
+    /// 
+    /// A PolygonCollection (with ObservableCollection of Location elements) may be used
+    /// for the Polygons property if collection changes of the property itself and its
+    /// elements are both supposed to trigger a UI update.
+    /// </summary>
+    public class MapMultiPolygon : MapShape, IWeakEventListener
+    {
+        public static readonly DependencyProperty PolygonsProperty = DependencyProperty.Register(
+            nameof(Polygons), typeof(IEnumerable<IEnumerable<Location>>), typeof(MapMultiPolygon),
+            new PropertyMetadata(null, (o, e) => ((MapMultiPolygon)o).DataCollectionPropertyChanged(e)));
+
+        /// <summary>
+        /// Gets or sets the Locations that define the multi-polygon points.
+        /// </summary>
+        public IEnumerable<IEnumerable<Location>> Polygons
+        {
+            get { return (IEnumerable<IEnumerable<Location>>)GetValue(PolygonsProperty); }
+            set { SetValue(PolygonsProperty, value); }
+        }
+
+        protected override void UpdateData()
+        {
+            Data.Figures.Clear();
+
+            if (ParentMap != null && Polygons != null)
+            {
+                foreach (var polygon in Polygons.Where(p => p.Any()))
+                {
+                    var points = polygon.Select(loc => LocationToPoint(loc));
+                    var polyline = new PolyLineSegment(points.Skip(1), true);
+
+                    Data.Figures.Add(new PathFigure(points.First(), new PathSegment[] { polyline }, true));
+                }
+            }
+        }
+    }
+}