Adjust project structure

src/Shared/HandyControl_Shared/Controls/Attach/BorderElement.cs

@@ -0,0 +1,50 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using HandyControl.Data;
+using HandyControl.Tools.Converter;
+
+namespace HandyControl.Controls
+{
+    public class BorderElement
+    {
+        public static readonly DependencyProperty CornerRadiusProperty = DependencyProperty.RegisterAttached(
+            "CornerRadius", typeof(CornerRadius), typeof(BorderElement), new FrameworkPropertyMetadata(default(CornerRadius), FrameworkPropertyMetadataOptions.Inherits));
+
+        public static void SetCornerRadius(DependencyObject element, CornerRadius value) => element.SetValue(CornerRadiusProperty, value);
+
+        public static CornerRadius GetCornerRadius(DependencyObject element) => (CornerRadius)element.GetValue(CornerRadiusProperty);
+
+        public static readonly DependencyProperty CircularProperty = DependencyProperty.RegisterAttached(
+            "Circular", typeof(bool), typeof(BorderElement), new PropertyMetadata(ValueBoxes.FalseBox, OnCircularChanged));
+
+        private static void OnCircularChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            if (d is Border border)
+            {
+                if ((bool)e.NewValue)
+                {
+                    var binding = new MultiBinding
+                    {
+                        Converter = new BorderCircularConverter()
+                    };
+                    binding.Bindings.Add(new Binding(FrameworkElement.ActualWidthProperty.Name) {Source = border});
+                    binding.Bindings.Add(new Binding(FrameworkElement.ActualHeightProperty.Name) { Source = border });
+                    border.SetBinding(Border.CornerRadiusProperty, binding);
+                }
+                else
+                {
+                    BindingOperations.ClearBinding(border, FrameworkElement.MinWidthProperty);
+                    BindingOperations.ClearBinding(border, FrameworkElement.MinHeightProperty);
+                    BindingOperations.ClearBinding(border, Border.CornerRadiusProperty);
+                }
+            }
+        }
+
+        public static void SetCircular(DependencyObject element, bool value)
+            => element.SetValue(CircularProperty, value);
+
+        public static bool GetCircular(DependencyObject element)
+            => (bool) element.GetValue(CircularProperty);
+    }
+}