Version 4.8.0: Improved WPF MapPolyline and MapPolygon accuracy.

MapControl/Shared/MapPolygon.cs

@@ -0,0 +1,49 @@
+// 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;
+#if WINDOWS_UWP
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Media;
+#else
+using System.ComponentModel;
+using System.Windows;
+using System.Windows.Media;
+#endif
+
+namespace MapControl
+{
+    /// <summary>
+    /// A polygon defined by a collection of Locations.
+    /// </summary>
+    public class MapPolygon : MapShape
+    {
+        public static readonly DependencyProperty LocationsProperty = DependencyProperty.Register(
+            nameof(Locations), typeof(IEnumerable<Location>), typeof(MapPolygon),
+            new PropertyMetadata(null, (o, e) => ((MapPolygon)o).DataCollectionPropertyChanged(e)));
+
+        /// <summary>
+        /// Gets or sets the Locations that define the polygon points.
+        /// </summary>
+#if !WINDOWS_UWP
+        [TypeConverter(typeof(LocationCollectionConverter))]
+#endif
+        public IEnumerable<Location> Locations
+        {
+            get { return (IEnumerable<Location>)GetValue(LocationsProperty); }
+            set { SetValue(LocationsProperty, value); }
+        }
+
+        protected override void UpdateData()
+        {
+            var figures = ((PathGeometry)Data).Figures;
+            figures.Clear();
+
+            if (ParentMap != null)
+            {
+                AddPolylineFigures(figures, Locations, true);
+            }
+        }
+    }
+}