aistudio-wpf-diagram/Util.DiagramDesigner/Controls/Connector.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;

namespace Util.DiagramDesigner
{
    public class Connector : Control
    {

        protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
        {
            base.OnMouseLeftButtonDown(e);
            DesignerCanvas canvas = GetDesignerCanvas(this);
            if (canvas != null)
            {
                canvas.SourceConnector = this;
            }
        }

        public ConnectorOrientation Orientation { get; set; }

        // iterate through visual tree to get parent DesignerCanvas
        private DesignerCanvas GetDesignerCanvas(DependencyObject element)
        {
            while (element != null && !(element is DesignerCanvas))
                element = VisualTreeHelper.GetParent(element);

            return element as DesignerCanvas;
        }

    }



}