serein-flow/Workbench/Node/Junction/View/ExecuteJunctionControl.cs

using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;
using Serein.Library;

namespace Serein.Workbench.Node.View
{
    public class ExecuteJunctionControl : JunctionControlBase
    {



        public ExecuteJunctionControl()
        {
            base.JunctionType = JunctionType.Execute;
            this.InvalidateVisual();

        }
        private Point _myCenterPoint;
        public override Point MyCenterPoint { get => _myCenterPoint; }
        public override void Render(DrawingContext drawingContext)
        {
            double width = ActualWidth;
            double height = ActualHeight;

            // 绘制边框
            //var borderBrush = new SolidColorBrush(Colors.Black);
            //var borderThickness = 1.0;
            //var borderRect = new Rect(0, 0, width, height);
            //drawingContext.DrawRectangle(null, new Pen(borderBrush, borderThickness), borderRect);

            // 输入连接器的背景
            var connectorBackground = IsMouseOver ? Brushes.DarkCyan : Brushes.Transparent;
            var connectorRect = new Rect(4, 4, width - 8, height - 8);
            drawingContext.DrawRectangle(connectorBackground, null, connectorRect);

            // 定义圆形的大小和位置
            double connectorSize = 10; // 连接器的大小
            double circleCenterX = 8; // 圆心 X 坐标
            double circleCenterY = height / 2; // 圆心 Y 坐标

            var circlePoint = new Point(circleCenterX, circleCenterY);
            // 绘制连接器的圆形部分
             var ellipse = new EllipseGeometry(circlePoint, connectorSize / 2, connectorSize / 2);
            _myCenterPoint = new Point(circleCenterX - connectorSize / 2, circleCenterY);


             drawingContext.DrawGeometry(IsMouseOver ? Brushes.DarkCyan : Brushes.Transparent, new Pen(Brushes.Black, 1), ellipse);




            // 定义三角形的间距
            double triangleOffsetX = 4; // 三角形与圆形的间距
            double triangleCenterX = circleCenterX + connectorSize / 2 + triangleOffsetX; // 三角形中心 X 坐标
            double triangleCenterY = circleCenterY; // 三角形中心 Y 坐标

            // 绘制三角形
            var pathGeometry = new StreamGeometry();
            using (var context = pathGeometry.Open())
            {
                context.BeginFigure(new Point(triangleCenterX, triangleCenterY - 4.5), true, true);
                context.LineTo(new Point(triangleCenterX + 5, triangleCenterY), true, false);
                context.LineTo(new Point(triangleCenterX, triangleCenterY + 4.5), true, false);
                context.LineTo(new Point(triangleCenterX, triangleCenterY - 4.5), true, false);
            }
            drawingContext.DrawGeometry(IsMouseOver ? Brushes.DarkCyan : Brushes.Transparent, new Pen(Brushes.Black, 1), pathGeometry);

            // 绘制标签
            //var formattedText = new FormattedText(
            //    "执行",
            //    System.Globalization.CultureInfo.CurrentCulture,
            //    FlowDirection.LeftToRight,
            //    new Typeface("Segoe UI"),
            //    12,
            //    Brushes.Black,
            //    VisualTreeHelper.GetDpi(this).PixelsPerDip);
            //drawingContext.DrawText(formattedText, new Point(18,1));
        }
    }


}