Synchronize the Net40

Net40/HandyControl_Net40/Controls/Other/Gravatar.cs

@@ -0,0 +1,51 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+using HandyControl.Tools;
+
+namespace HandyControl.Controls
+{
+    public class Gravatar : ContentControl
+    {
+        public static readonly DependencyProperty GeneratorProperty = DependencyProperty.Register(
+            "Generator", typeof(IGravatarGenerator), typeof(Gravatar), new PropertyMetadata(new GithubGravatarGenerator()));
+
+        public IGravatarGenerator Generator
+        {
+            get => (IGravatarGenerator)GetValue(GeneratorProperty);
+            set => SetValue(GeneratorProperty, value);
+        }
+
+        public static readonly DependencyProperty IdProperty = DependencyProperty.Register(
+            "Id", typeof(string), typeof(Gravatar), new PropertyMetadata(default(string), OnIdChanged));
+
+        private static void OnIdChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var ctl = (Gravatar)d;
+            if (ctl.Source != null) return;
+            ctl.Content = ctl.Generator.GetGravatar((string)e.NewValue);
+        }
+
+        public string Id
+        {
+            get => (string)GetValue(IdProperty);
+            set => SetValue(IdProperty, value);
+        }
+
+
+        public static readonly DependencyProperty SourceProperty = DependencyProperty.Register(
+            "Source", typeof(ImageSource), typeof(Gravatar), new PropertyMetadata(default(ImageSource), OnSourceChanged));
+
+        private static void OnSourceChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var ctl = (Gravatar)d;
+            ctl.Background = new ImageBrush((ImageSource)e.NewValue);
+        }
+
+        public ImageSource Source
+        {
+            get => (ImageSource)GetValue(SourceProperty);
+            set => SetValue(SourceProperty, value);
+        }
+    }
+}