refactor<*>: rewrite all codes...

src/Views/Controls/Badge.cs

@@ -0,0 +1,52 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Media;
+
+namespace SourceGit.Views.Controls {
+
+    /// <summary>
+    ///     徽章
+    /// </summary>
+    public class Badge : Border {
+        private TextBlock label = null;
+
+        public static readonly DependencyProperty LabelProperty = DependencyProperty.Register(
+            "Label",
+            typeof(string),
+            typeof(Border),
+            new PropertyMetadata("", OnLabelChanged));
+
+        public string Label {
+            get { return (string)GetValue(LabelProperty); }
+            set { SetValue(LabelProperty, value); }
+        }
+
+        public Badge() {
+            Width = double.NaN;
+            Height = 18;
+            CornerRadius = new CornerRadius(9);
+            VerticalAlignment = VerticalAlignment.Center;
+            Background = FindResource("Brush.Badge") as Brush;
+            Visibility = Visibility.Collapsed;
+
+            label = new TextBlock();
+            label.FontSize = 10;
+            label.HorizontalAlignment = HorizontalAlignment.Center;
+            label.Margin = new Thickness(9, 0, 9, 0);
+            Child = label;
+        }
+
+        private static void OnLabelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) {
+            Badge badge = d as Badge;
+            if (badge != null) {
+                var text = e.NewValue as string;
+                if (string.IsNullOrEmpty(text) || text == "0") {
+                    badge.Visibility = Visibility.Collapsed;
+                } else {
+                    badge.label.Text = text;
+                    badge.Visibility = Visibility.Visible;
+                }
+            }
+        }
+    }
+}