new CornerRadius property for Buttons

Author: punker76

MahApps.Metro/Controls/Helper/ButtonHelper.cs

@@ -6,8 +6,10 @@ namespace MahApps.Metro.Controls
     public static class ButtonHelper
     {
         public static readonly DependencyProperty PreserveTextCaseProperty =
-                DependencyProperty.RegisterAttached("PreserveTextCase", typeof(bool), typeof(ButtonHelper), new FrameworkPropertyMetadata(false, 
-                    FrameworkPropertyMetadataOptions.Inherits | FrameworkPropertyMetadataOptions.AffectsMeasure));
+            DependencyProperty.RegisterAttached("PreserveTextCase", typeof(bool), typeof(ButtonHelper),
+                                                new FrameworkPropertyMetadata(
+                                                    false,
+                                                    FrameworkPropertyMetadataOptions.Inherits | FrameworkPropertyMetadataOptions.AffectsMeasure));
 
         /// <summary>
         /// Overrides the text case behavior for certain buttons.
@@ -23,5 +25,31 @@ public static void SetPreserveTextCase(UIElement element, bool value)
         {
             element.SetValue(PreserveTextCaseProperty, value);
         }
+
+        /// <summary>
+        /// DependencyProperty for <see cref="CornerRadius" /> property.
+        /// </summary>
+        public static readonly DependencyProperty CornerRadiusProperty
+            = DependencyProperty.RegisterAttached("CornerRadius", typeof(CornerRadius), typeof(ButtonHelper),
+                                                  new FrameworkPropertyMetadata(
+                                                      new CornerRadius(),
+                                                      FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.AffectsRender));
+        
+        /// <summary> 
+        /// The CornerRadius property allows users to control the roundness of the button corners independently by 
+        /// setting a radius value for each corner. Radius values that are too large are scaled so that they
+        /// smoothly blend from corner to corner. (Can be used e.g. at MetroButton style)
+        /// Description taken from original Microsoft description :-D
+        /// </summary>
+        [AttachedPropertyBrowsableForType(typeof(Button))]
+        public static CornerRadius GetCornerRadius(UIElement element)
+        {
+            return (CornerRadius)element.GetValue(CornerRadiusProperty);
+        }
+
+        public static void SetCornerRadius(UIElement element, CornerRadius value)
+        {
+            element.SetValue(CornerRadiusProperty, value);
+        }
     }
 }