月更

AntDesignWPF/Utils/CornerRadiusUtil.cs

@@ -0,0 +1,81 @@
+namespace AntDesign.WPF.Utils
+{
+    using System.Windows;
+
+    public static class CornerRadiusUtil
+    {
+        /// <summary>
+        /// 验证角半径是否只包含有效值
+        /// 有效性检查集作为参数传递。
+        /// </summary>
+        /// <param name='corner'>CornerRadius value</param>
+        /// <param name='allowNegative'>allows negative values</param>
+        /// <param name='allowNaN'>allows Double.NaN</param>
+        /// <param name='allowPositiveInfinity'>allows Double.PositiveInfinity</param>
+        /// <param name='allowNegativeInfinity'>allows Double.NegativeInfinity</param>
+        /// <returns>Whether or not the CornerRadius complies to the range specified</returns>
+        public static bool IsValid(CornerRadius corner, bool allowNegative, bool allowNaN, bool allowPositiveInfinity, bool allowNegativeInfinity)
+        {
+            if (!allowNegative)
+            {
+                if (corner.TopLeft < 0d || corner.TopRight < 0d || corner.BottomLeft < 0d || corner.BottomRight < 0d)
+                {
+                    return false;
+                }
+            }
+
+            if (!allowNaN)
+            {
+                if (DoubleUtil.IsNaN(corner.TopLeft) || DoubleUtil.IsNaN(corner.TopRight) ||
+                    DoubleUtil.IsNaN(corner.BottomLeft) || DoubleUtil.IsNaN(corner.BottomRight))
+                {
+                    return false;
+                }
+            }
+
+            if (!allowPositiveInfinity)
+            {
+                if (double.IsPositiveInfinity(corner.TopLeft) || double.IsPositiveInfinity(corner.TopRight) ||
+                    double.IsPositiveInfinity(corner.BottomLeft) || double.IsPositiveInfinity(corner.BottomRight))
+                {
+                    return false;
+                }
+            }
+
+            if (!allowNegativeInfinity)
+            {
+                if (double.IsNegativeInfinity(corner.TopLeft) || double.IsNegativeInfinity(corner.TopRight) ||
+                    double.IsNegativeInfinity(corner.BottomLeft) || double.IsNegativeInfinity(corner.BottomRight))
+                {
+                    return false;
+                }
+            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Verifies if the CornerRadius contains only zero values
+        /// </summary>
+        /// <param name="corner">CornerRadius</param>
+        /// <returns>Size</returns>
+        public static bool IsZero(CornerRadius corner)
+        {
+            return DoubleUtil.IsZero(corner.TopLeft) && DoubleUtil.IsZero(corner.TopRight)
+                    && DoubleUtil.IsZero(corner.BottomRight) && DoubleUtil.IsZero(corner.BottomLeft);
+        }
+
+        /// <summary>
+        /// Verifies if the CornerRadius contains same values
+        /// </summary>
+        /// <param name="corner">CornerRadius</param>
+        /// <returns>true if yes, otherwise false</returns>
+        public static bool IsUniform(CornerRadius corner)
+        {
+            var topLeft = corner.TopLeft;
+            return DoubleUtil.AreClose(topLeft, corner.TopRight)
+                    && DoubleUtil.AreClose(topLeft, corner.BottomRight)
+                    && DoubleUtil.AreClose(topLeft, corner.BottomLeft);
+        }
+    }
+}