Version 4.9.0: Reworked MapPanel child arrangement.

MapControl/Shared/MapOverlay.cs

@@ -20,31 +20,6 @@ namespace MapControl
     /// </summary>
     public partial class MapOverlay : MapPanel
     {
-        public MapOverlay()
-        {
-            Loaded += (s, e) =>
-            {
-#if WINDOWS_UWP
-                if (Foreground == null)
-                {
-                    SetBinding(ForegroundProperty, new Binding
-                    {
-                        Source = this,
-                        Path = new PropertyPath("ParentMap.Foreground")
-                    });
-                }
-#endif
-                if (Stroke == null)
-                {
-                    SetBinding(StrokeProperty, new Binding
-                    {
-                        Source = this,
-                        Path = new PropertyPath("Foreground")
-                    });
-                }
-            };
-        }
-
         public double FontSize
         {
             get { return (double)GetValue(FontSizeProperty); }
@@ -134,5 +109,82 @@ namespace MapControl
             get { return (double)GetValue(StrokeMiterLimitProperty); }
             set { SetValue(StrokeMiterLimitProperty, value); }
         }
+
+        public Binding ForegroundBinding
+        {
+            get { return GetBinding(ForegroundProperty, nameof(Foreground)); }
+        }
+
+        public Binding StrokeBinding
+        {
+            get { return GetBinding(StrokeProperty, nameof(Stroke)); }
+        }
+
+        public Binding StrokeThicknessBinding
+        {
+            get { return GetBinding(StrokeThicknessProperty, nameof(StrokeThickness)); }
+        }
+
+        public Binding StrokeDashArrayBinding
+        {
+            get { return GetBinding(StrokeDashArrayProperty, nameof(StrokeDashArray)); }
+        }
+
+        public Binding StrokeDashOffsetBinding
+        {
+            get { return GetBinding(StrokeDashOffsetProperty, nameof(StrokeDashOffset)); }
+        }
+
+        public Binding StrokeDashCapBinding
+        {
+            get { return GetBinding(StrokeDashCapProperty, nameof(StrokeDashCap)); }
+        }
+
+        public Binding StrokeStartLineCapBinding
+        {
+            get { return GetBinding(StrokeStartLineCapProperty, nameof(StrokeStartLineCap)); }
+        }
+
+        public Binding StrokeEndLineCapBinding
+        {
+            get { return GetBinding(StrokeEndLineCapProperty, nameof(StrokeEndLineCap)); }
+        }
+
+        public Binding StrokeLineJoinBinding
+        {
+            get { return GetBinding(StrokeLineJoinProperty, nameof(StrokeLineJoin)); }
+        }
+
+        public Binding StrokeMiterLimitBinding
+        {
+            get { return GetBinding(StrokeMiterLimitProperty, nameof(StrokeMiterLimit)); }
+        }
+
+        protected override void SetParentMap(MapBase map)
+        {
+            if (map != null)
+            {
+#if WINDOWS_UWP
+                if (Foreground == null)
+                {
+                    SetBinding(ForegroundProperty,
+                        map.GetBindingExpression(MapBase.ForegroundProperty)?.ParentBinding ??
+                        new Binding { Source = map, Path = new PropertyPath("Foreground") });
+                }
+#endif
+                if (Stroke == null)
+                {
+                    SetBinding(StrokeProperty, ForegroundBinding);
+                }
+            }
+
+            base.SetParentMap(map);
+        }
+
+        private Binding GetBinding(DependencyProperty property, string propertyName)
+        {
+            return GetBindingExpression(property)?.ParentBinding ??
+                new Binding { Source = this, Path = new PropertyPath(propertyName) };
+        }
     }
 }

MapControl/Shared/MapPanel.cs

@@ -72,14 +72,17 @@ namespace MapControl
         public MapBase ParentMap
         {
             get { return parentMap; }
-            set
+            set { SetParentMap(value); }
+        }
+
+        protected virtual void SetParentMap(MapBase map)
         {
             if (parentMap != null && parentMap != this)
             {
                 parentMap.ViewportChanged -= OnViewportChanged;
             }
 
-                parentMap = value;
+            parentMap = map;
 
             if (parentMap != null && parentMap != this)
             {
@@ -88,7 +91,6 @@ namespace MapControl
                 OnViewportChanged(new ViewportChangedEventArgs());
             }
         }
-        }
 
         protected override Size MeasureOverride(Size availableSize)
         {

MapControl/Shared/MapScale.cs

@@ -34,32 +34,15 @@ namespace MapControl
         public MapScale()
         {
             IsHitTestVisible = false;
-#if WINDOWS_UWP
             MinWidth = 100d;
-#else
-            SetCurrentValue(MinWidthProperty, 100d);
-#endif
+
             label.HorizontalAlignment = HorizontalAlignment.Left;
             label.VerticalAlignment = VerticalAlignment.Top;
             label.TextAlignment = TextAlignment.Center;
+            label.SetBinding(TextBlock.ForegroundProperty, ForegroundBinding);
 
-            label.SetBinding(TextBlock.ForegroundProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("Foreground")
-            });
-
-            line.SetBinding(Shape.StrokeProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("Stroke")
-            });
-
-            line.SetBinding(Shape.StrokeThicknessProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeThickness")
-            });
+            line.SetBinding(Shape.StrokeProperty, StrokeBinding);
+            line.SetBinding(Shape.StrokeThicknessProperty, StrokeThicknessBinding);
 
             Children.Add(line);
             Children.Add(label);

MapControl/UWP/MapGraticule.UWP.cs

@@ -30,12 +30,12 @@ namespace MapControl
             {
                 if (path == null)
                 {
-                    path = new Path
-                    {
-                        Data = new PathGeometry()
-                    };
-
-                    SetStrokeBindings(path);
+                    path = new Path { Data = new PathGeometry() };
+                    path.SetBinding(Shape.StrokeProperty, StrokeBinding);
+                    path.SetBinding(Shape.StrokeThicknessProperty, StrokeThicknessBinding);
+                    path.SetBinding(Shape.StrokeDashArrayProperty, StrokeDashArrayBinding);
+                    path.SetBinding(Shape.StrokeDashOffsetProperty, StrokeDashOffsetBinding);
+                    path.SetBinding(Shape.StrokeDashCapProperty, StrokeDashCapBinding);
                     Children.Add(path);
                 }
 
@@ -115,31 +115,14 @@ namespace MapControl
                             renderTransform.Children.Add(ParentMap.RotateTransform);
                             renderTransform.Children.Add(new TranslateTransform());
 
-                            label = new TextBlock
-                            {
-                                RenderTransform = renderTransform
-                            };
-
-                            label.SetBinding(TextBlock.ForegroundProperty, new Binding
-                            {
-                                Source = this,
-                                Path = new PropertyPath("Foreground")
-                            });
+                            label = new TextBlock { RenderTransform = renderTransform };
+                            label.SetBinding(TextBlock.ForegroundProperty, ForegroundBinding);
 
                             Children.Add(label);
                         }
 
                         childIndex++;
 
-                        if (FontFamily != null)
-                        {
-                            label.FontFamily = FontFamily;
-                        }
-
-                        label.FontSize = FontSize;
-                        label.FontStyle = FontStyle;
-                        label.FontStretch = FontStretch;
-                        label.FontWeight = FontWeight;
                         label.Text = GetLabelText(lat, labelFormat, "NS") + "\n" + GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW");
                         label.Tag = new Location(lat, lon);
                         label.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));

MapControl/UWP/MapOverlay.UWP.cs

@@ -4,9 +4,7 @@
 
 using Windows.UI.Text;
 using Windows.UI.Xaml;
-using Windows.UI.Xaml.Data;
 using Windows.UI.Xaml.Media;
-using Windows.UI.Xaml.Shapes;
 
 namespace MapControl
 {
@@ -56,62 +54,5 @@ namespace MapControl
 
         public static readonly DependencyProperty StrokeMiterLimitProperty = DependencyProperty.Register(
             nameof(StrokeMiterLimit), typeof(double), typeof(MapOverlay), new PropertyMetadata(1d));
-
-        public void SetStrokeBindings(Shape shape)
-        {
-            shape.SetBinding(Shape.StrokeProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("Stroke")
-            });
-
-            shape.SetBinding(Shape.StrokeThicknessProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeThickness")
-            });
-
-            shape.SetBinding(Shape.StrokeDashArrayProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeDashArray")
-            });
-
-            shape.SetBinding(Shape.StrokeDashOffsetProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeDashOffset")
-            });
-
-            shape.SetBinding(Shape.StrokeDashCapProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeDashCap")
-            });
-
-            shape.SetBinding(Shape.StrokeStartLineCapProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeStartLineCap")
-            });
-
-            shape.SetBinding(Shape.StrokeEndLineCapProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeEndLineCap")
-            });
-
-            shape.SetBinding(Shape.StrokeLineJoinProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeLineJoin")
-            });
-
-            shape.SetBinding(Shape.StrokeMiterLimitProperty, new Binding
-            {
-                Source = this,
-                Path = new PropertyPath("StrokeMiterLimit")
-            });
-        }
     }
 }