添加Avalonia项目的demo

Serein.Workbench.Avalonia/Extension/LineExtension.cs

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+using Avalonia.Media;
+using Serein.Library;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.Avalonia.Extension
+{
+
+    /// <summary>
+    /// 线条颜色
+    /// </summary>
+    public static class LineExtension
+    {
+        /// <summary>
+        /// 根据连接类型指定颜色
+        /// </summary>
+        /// <param name="currentConnectionType"></param>
+        /// <returns></returns>
+        /// <exception cref="Exception"></exception>
+        public static SolidColorBrush ToLineColor(this ConnectionInvokeType currentConnectionType)
+        {
+            return currentConnectionType switch
+            {
+                ConnectionInvokeType.IsSucceed => new SolidColorBrush(Color.Parse("#04FC10")), // 04FC10 & 027E08
+                ConnectionInvokeType.IsFail => new SolidColorBrush(Color.Parse("#F18905")),
+                ConnectionInvokeType.IsError => new SolidColorBrush(Color.Parse("#FE1343")),
+                ConnectionInvokeType.Upstream => new SolidColorBrush(Color.Parse("#4A82E4")),
+                ConnectionInvokeType.None => new SolidColorBrush(Color.Parse("#56CEF6")),
+                _ => throw new Exception(),
+            };
+        }
+        /// <summary>
+        /// 根据连接类型指定颜色
+        /// </summary>
+        /// <param name="connection"></param>
+        /// <returns></returns>
+        /// <exception cref="Exception"></exception>
+        public static SolidColorBrush ToLineColor(this ConnectionArgSourceType connection)
+        {
+            return connection switch
+            {
+
+                ConnectionArgSourceType.GetPreviousNodeData => new SolidColorBrush(Color.Parse("#56CEF6")), // 04FC10 & 027E08
+                ConnectionArgSourceType.GetOtherNodeData => new SolidColorBrush(Color.Parse("#56CEF6")),
+                ConnectionArgSourceType.GetOtherNodeDataOfInvoke => new SolidColorBrush(Color.Parse("#56CEF6")),
+                _ => throw new Exception(),
+            };
+        }
+
+    }
+
+}

Serein.Workbench.Avalonia/Extension/PointExtension.cs

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+using Avalonia;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.Avalonia.Extension
+{
+    public static class PointExtension
+    {
+        public static Point Add(this Point a, Point b)
+        {
+            return new Point(a.X + b.X, a.Y + b.Y);
+        }
+
+        public static Point Sub(this Point a, Point b)
+        {
+            return new Point(a.X - b.X, a.Y - b.Y);
+        }
+
+        public static Vector ToVector(this Point me)
+        {
+            return new Vector(me.X, me.Y);
+        }
+    }
+    public static class VectorExtension
+    {
+        public static double DotProduct(this Vector a, Vector b)
+        {
+            return a.X * b.X + a.Y * b.Y;
+        }
+
+        public static Vector NormalizeTo(this Vector v)
+        {
+            var temp = v;
+            temp.Normalize();
+
+            return temp;
+        }
+    }
+}

Serein.Workbench.Avalonia/Extension/PointerExtension.cs

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+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Workbench.Avalonia.Extension
+{
+    internal static class PointerExtension
+    {
+        public static bool JudgePointer(this
+                                        PointerEventArgs eventArgs, 
+                                        object? sender,
+                                        PointerType pointerType,
+                                        Func<PointerPointProperties,bool> judgePointerFunc)
+        {
+            if(sender is not Visual visual)
+            {
+                return false;
+            }
+            if (eventArgs.Pointer.Type == pointerType) // 是否是否是指定的设备类型
+            {
+                var point = eventArgs.GetCurrentPoint(visual);  // 获取到点击点
+                return judgePointerFunc.Invoke(point.Properties); // 判断是否属于某种类型的点击
+            }
+            return false;
+        }
+    }
+}