source: stable/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/BaseClasses/ConnectionBase.cs @ 16189

using System;
using System.Drawing;
using System.Windows.Forms;
namespace Netron.Diagramming.Core
{
  /// <summary>
  /// Abstract base class for a connection
  /// </summary>
  public abstract partial class ConnectionBase : DiagramEntityBase, IConnection
    {
        // ------------------------------------------------------------------
        /// <summary>
        /// Specifies the minimum length a connection can be.  This is used
        /// by the ConnectionTool to determine if the connection start and
        /// stop points are far enough apart to create a connection.
        /// </summary>
        // ------------------------------------------------------------------
        public const int MinLength = 5;

        #region Fields

        // ------------------------------------------------------------------
        /// <summary>
        /// Implementation of IVersion - the current version of 
        /// ConnectionBase.
        /// </summary>
        // ------------------------------------------------------------------
        protected const double connectionBaseVersion = 1.0;

    /// <summary>
    /// the start connector
    /// </summary>
    private IConnector mFrom;
    /// <summary>
    /// the end connector
    /// </summary>
    private IConnector mTo;

    #endregion

        #region Properties

        // ------------------------------------------------------------------
        /// <summary>
        /// Gets the current version.
        /// </summary>
        // ------------------------------------------------------------------
        public override double Version
        {
            get
            {
                return connectionBaseVersion;
            }
        }

    /// <summary>
    /// The initial or start connector
    /// </summary>
    public IConnector From
    {
      get{return mFrom;}
      set{mFrom = value;}
    }
    /// <summary>
    /// The final or end connector
    /// </summary>
    /// <example>
    /// <code>
    /// Connection connection
    /// </code>
    /// </example>
    public IConnector To
    {
      get{return mTo;}
      set{mTo = value;}
    }


      

    #endregion

    #region Constructor
    /// <summary>
    /// Default constructor
    /// </summary>
    /// <param name="site"></param>
    protected ConnectionBase(IModel site) : base(site)
    {
            PenStyle = ArtPalette.GetDefaultPenStyle();

    }

        /// <summary>
        /// Initializes a new instance of the <see cref="T:ConnectionBase"/> class.
        /// </summary>
        /// <param name="from">From.</param>
        /// <param name="to">To.</param>
        protected ConnectionBase(Point from, Point to) : base()
        {
            this.mFrom = new Connector(from);
            this.mFrom.Parent = this;
            this.mTo = new Connector(to);
            this.mTo.Parent = this;
            PenStyle = ArtPalette.GetDefaultPenStyle();
        }

        public ConnectionBase() : base() { }
        
    #endregion

        #region Methods
        /// <summary>
        /// Paints the entity on the control
        /// </summary>
        /// <param name="g"></param>
        public override void Paint(Graphics g)
        {
            if (g == null)
                throw new ArgumentNullException("The Graphics object is 'null'");
            From.Paint(g);
            To.Paint(g);
        }
        /// <summary>
        /// The custom menu to be added to the base menu of this entity
        /// </summary>
        /// <returns>ToolStripItem[]</returns>
        public override ToolStripItem[] Menu()
        {
            return null;
        }
        /// <summary>
        /// Invalidates the entity
        /// </summary>
        public override void Invalidate()
        {
            

            Rectangle r = Rectangle;
            r.Offset(-10, -10);
            r.Inflate(40, 40);
            if (Model != null)
                Model.RaiseOnInvalidateRectangle(r);
        }
       
        #endregion




    }
}