Adjust project structure

src/Shared/HandyControl_Shared/Tools/Helper/ArithmeticHelper.cs

@@ -0,0 +1,152 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Media.Media3D;
+
+namespace HandyControl.Tools
+{
+    /// <summary>
+    ///     包含内部使用的一些简单算法
+    /// </summary>
+    internal class ArithmeticHelper
+    {
+        /// <summary>
+        ///     平分一个整数到一个数组中
+        /// </summary>
+        /// <param name="num"></param>
+        /// <param name="count"></param>
+        /// <returns></returns>
+        public static int[] DivideInt2Arr(int num, int count)
+        {
+            var arr = new int[count];
+            var div = num / count;
+            var rest = num % count;
+            for (int i = 0; i < count; i++)
+            {
+                arr[i] = div;
+            }
+            for (int i = 0; i < rest; i++)
+            {
+                arr[i] += 1;
+            }
+            return arr;
+        }
+
+        /// <summary>
+        ///     计算控件在窗口中的可见坐标
+        /// </summary>
+        public static Point CalSafePoint(FrameworkElement element, FrameworkElement showElement, Thickness thickness = default(Thickness))
+        {
+            if (element == null || showElement == null) return default(Point);
+            var point = element.PointToScreen(new Point(0, 0));
+
+            if (point.X < 0) point.X = 0;
+            if (point.Y < 0) point.Y = 0;
+
+            var maxLeft = SystemParameters.WorkArea.Width -
+                          ((double.IsNaN(showElement.Width) ? showElement.ActualWidth : showElement.Width) +
+                           thickness.Left + thickness.Right);
+            var maxTop = SystemParameters.WorkArea.Height -
+                         ((double.IsNaN(showElement.Height) ? showElement.ActualHeight : showElement.Height) +
+                          thickness.Top + thickness.Bottom);
+            return new Point(maxLeft > point.X ? point.X : maxLeft, maxTop > point.Y ? point.Y : maxTop);
+        }
+
+        /// <summary>
+        ///     获取布局范围框
+        /// </summary>
+        /// <param name="element"></param>
+        /// <returns></returns>
+        public static Rect GetLayoutRect(FrameworkElement element)
+        {
+            var num1 = element.ActualWidth;
+            var num2 = element.ActualHeight;
+            if (element is Image || element is MediaElement)
+                if (element.Parent is Canvas)
+                {
+                    num1 = double.IsNaN(element.Width) ? num1 : element.Width;
+                    num2 = double.IsNaN(element.Height) ? num2 : element.Height;
+                }
+                else
+                {
+                    num1 = element.RenderSize.Width;
+                    num2 = element.RenderSize.Height;
+                }
+            var width = element.Visibility == Visibility.Collapsed ? 0.0 : num1;
+            var height = element.Visibility == Visibility.Collapsed ? 0.0 : num2;
+            var margin = element.Margin;
+            var layoutSlot = LayoutInformation.GetLayoutSlot(element);
+            var x = 0.0;
+            var y = 0.0;
+            switch (element.HorizontalAlignment)
+            {
+                case HorizontalAlignment.Left:
+                    x = layoutSlot.Left + margin.Left;
+                    break;
+                case HorizontalAlignment.Center:
+                    x = (layoutSlot.Left + margin.Left + layoutSlot.Right - margin.Right) / 2.0 - width / 2.0;
+                    break;
+                case HorizontalAlignment.Right:
+                    x = layoutSlot.Right - margin.Right - width;
+                    break;
+                case HorizontalAlignment.Stretch:
+                    x = Math.Max(layoutSlot.Left + margin.Left,
+                        (layoutSlot.Left + margin.Left + layoutSlot.Right - margin.Right) / 2.0 - width / 2.0);
+                    break;
+            }
+            switch (element.VerticalAlignment)
+            {
+                case VerticalAlignment.Top:
+                    y = layoutSlot.Top + margin.Top;
+                    break;
+                case VerticalAlignment.Center:
+                    y = (layoutSlot.Top + margin.Top + layoutSlot.Bottom - margin.Bottom) / 2.0 - height / 2.0;
+                    break;
+                case VerticalAlignment.Bottom:
+                    y = layoutSlot.Bottom - margin.Bottom - height;
+                    break;
+                case VerticalAlignment.Stretch:
+                    y = Math.Max(layoutSlot.Top + margin.Top,
+                        (layoutSlot.Top + margin.Top + layoutSlot.Bottom - margin.Bottom) / 2.0 - height / 2.0);
+                    break;
+            }
+            return new Rect(x, y, width, height);
+        }
+
+        /// <summary>
+        ///     计算两点的连线和x轴的夹角
+        /// </summary>
+        /// <param name="center"></param>
+        /// <param name="p"></param>
+        /// <returns></returns>
+        public static double CalAngle(Point center, Point p) => Math.Atan2(p.Y - center.Y, p.X - center.X) * 180 / Math.PI;
+
+        /// <summary>
+        ///     判断是否是有效的双精度浮点数
+        /// </summary>
+        /// <param name="value"></param>
+        /// <returns></returns>
+        public static bool IsValidDoubleValue(object value)
+        {
+            var d = (double)value;
+            if (!double.IsNaN(d))
+                return !double.IsInfinity(d);
+            return false;
+        }
+
+        /// <summary>
+        ///     计算法线
+        /// </summary>
+        /// <param name="p0"></param>
+        /// <param name="p1"></param>
+        /// <param name="p2"></param>
+        /// <returns></returns>
+        public static Vector3D CalNormal(Point3D p0, Point3D p1, Point3D p2)
+        {
+            var v0 = new Vector3D(p1.X - p0.X, p1.Y - p0.Y, p1.Z - p0.Z);
+            var v1 = new Vector3D(p2.X - p1.X, p2.Y - p1.Y, p2.Z - p1.Z);
+            return Vector3D.CrossProduct(v0, v1);
+        }
+    }
+}