马甲贴 - - 类似于visio的工具栏的控件的开发

项目实现一个类似Visio工具栏的控件，线条和基本的图形已经弄出来了。就是可以拖出来调节等。但是我想知道visio中那些连接点都是很智能的连接的这种功能如何实现？
大家有思路没思路的都来说说啊，。 --------------------编程问答-------------------- 为每个图形添加连接点，捕获到连接线端点位置与图形重合就重绘连接线...

有多个连接点时，计算一下距离最近的连接点再重绘连接线... --------------------编程问答--------------------

帮顶。。。 --------------------编程问答-------------------- 帮顶一下吧！ --------------------编程问答-------------------- 像二楼说的，连接点进行判断 --------------------编程问答-------------------- 哥每天看贴无数,看多了，精神颓废了，自信消失了，尊严感也快殆尽了，从前自以为是特别爱国的人之一、是最关心民族命运的人之一，后来发现自己不过是小小的普通百姓，自己的命运都不能掌控，还在考虑国家大事，有一点可笑，是不是自己疯了，变成阿Q了。回帖也就发发牢骚而已,宛如疯子边走边唱，即使路人听到也是露出鄙夷的神色，于事无补。从此我就把这段文字保存在记事本里,每看一贴就复制粘贴一次，顺便留下自己沉重而又疲惫的影子.. --------------------编程问答--------------------

引用 5 楼 zbs5010 的回复:

哥每天看贴无数,看多了，精神颓废了，自信消失了，尊严感也快殆尽了，从前自以为是特别爱国的人之一、是最关心民族命运的人之一，后来发现自己不过是小小的普通百姓，自己的命运都不能掌控，还在考虑国家大事，有一点可笑，是不是自己疯了，变成阿Q了。回帖也就发发牢骚而已,宛如疯子边走边唱，即使路人听到也是露出鄙夷的神色，于事无补。从此我就把这段文字保存在记事本里,每看一贴就复制粘贴一次，顺便留下自己沉重而又疲……

联想的真够远的 --------------------编程问答--------------------



using System;

using System.Collections.Generic;

using System.Text;

using System.Drawing;

using System.Drawing.Drawing2D;



namespace AutoDiagramer

{

    #region AssociationDrawer CLASS

    /// <summary>

    /// This class simply draws a single association line between

    /// a source <see cref="DrawableClass">class</see> and a 

    /// destination <see cref="DrawableClass">class</see>. The line 

    /// is drawn using the Graphics object of the 

    /// <see cref="ClassDrawerContainerPanel"> ClassDrawerContainerPanel

    /// </see>, where all the classes are contained

    /// </summary>

    public class AssociationDrawer

    {

        #region Instance fields

        //instance fields

        private DrawableClass _ucdSrc = null;

        private DrawableClass _ucdDest = null;

        private int _XLeft=-1;

        private int _XThis=-1;

        private int _GenericSpace=0;

        private Graphics _g = null;

        public enum AssociationDirections { North,South,East,West,NorthNonDirect,

                                            SouthNonDirect, EastNonDirect, WestNonDirect,

                                            NorthEast,SouthEast,NorthWest,SouthWest,NOTRECOGNIZED  };

        // private AssociationDirections _CurrAssDirection = AssociationDirections.NOTRECOGNIZED;

        private int _RandomLineOffSet = 10;

        #endregion

        #region Constructor

        /// <summary>

        /// Creates a new AssociationDrawer object using the parameters provided and

        /// then calls the internal Draw() method

        /// </summary>

        /// <param name="g">The graphics object of the <see cref="ClassDrawerContainerPanel">

        /// ClassDrawerContainerPanel</see>, so that this class can draw an association

        /// line on the panel where the classes are held</param>

        /// <param name="ucdSrc">The source <see cref="DrawableClass">class</see></param>

        /// <param name="ucdDest">The destination <see cref="DrawableClass">class</see></param>

        /// <param name="genericSpace">The generic space between classes used by the

        /// <see cref="ClassDrawerContainerPanel">ClassDrawerContainerPanel</see> 

        /// when laying out the controls</param>

        /// <param name="_XLeft">The X-Pos of the widest control in the column to the left of the ucdSrc control</param>

        /// <param name="_XThis">The X-Pos of the widest control in the column of the ucdSrc control</param>



        public AssociationDrawer(Graphics g, DrawableClass ucdSrc, DrawableClass ucdDest,int genericSpace,int _XLeft,int _XThis)

	    {

            this._ucdSrc = ucdSrc;

            this._ucdDest = ucdDest;

            this._GenericSpace = genericSpace;

            this._g = g;

            this._XLeft = _XLeft;

            this._XThis = _XThis;

            //do the draw

            GetDirectionAndDraw();



        }

        #endregion

        #region Private Methods

        /// <summary>

        /// Works out which direction the association line should be based

        /// on the source <see cref="DrawableClass">class</see> ContainerRow/

        /// ContainerColumn and the destination <see cref="DrawableClass">class</see>

        ///  ContainerRow/ ContainerColumn. When the direction is found, one of the Draw

        /// direction methods is called, for example DrawNorth(), DrawSouth()

        /// </summary>

--------------------编程问答-------------------- 顶顶顶 --------------------编程问答--------------------



/// <summary>

        /// Draws a NorthWest OR SouthWest association line and arrow

        /// </summary>

        private void DrawNorthWest_DrawSouthWest()

        {

            int xStart = _ucdSrc.Left;

            int yStart = _ucdSrc.Top + 40;

            int xEnd = _ucdSrc.Left - (_GenericSpace - (_RandomLineOffSet + Program.GetRandom(_RandomLineOffSet)));

            int yEnd = _ucdSrc.Top + 40;

            //create a dasked line 

            Pen p = new Pen(new SolidBrush(Color.Black));

            p.DashStyle = DashStyle.Dash;

            //line across

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));



            //see if we need to draw up and along then up again for NorthWest

            //   <----

            //       |

            //       |    

            //       |_____   

            //             |

            //

            // OR see if we need to draw down and along then down again for SouthWest

            //      

            //        _____|

            //       |

            //       |  

            //   <----           

            if (_ucdSrc.ContainerColumn - _ucdDest.ContainerColumn > 1)

            {

                //line up

                xStart = xEnd;

                yStart = yEnd;

                //if its the very first row, make sure line is actually visible

                if (_ucdSrc.ContainerRow != 0)

                {

                    yEnd = _ucdSrc.Top - (_GenericSpace - (_RandomLineOffSet + Program.GetRandom(_RandomLineOffSet)));

                }

                else

                {

                    yEnd = _ucdSrc.Top - (_GenericSpace - 10);

                }

                _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

                //line across

                xStart = xEnd;

                yStart = yEnd;

                xEnd = _XLeft + (_GenericSpace - (_RandomLineOffSet + Program.GetRandom(_RandomLineOffSet))) ;

                _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

                //line up

                xStart = xEnd;

                yStart = yEnd;

                yEnd = _ucdDest.Top + 40;

                _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

                //line across

                xStart = xEnd;

                xEnd = _ucdDest.Right;

                yStart = yEnd;

                _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

                //draw the end arrow

                _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd + 10, yEnd - 5));

                _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd + 10, yEnd + 5));



            }

            //its only 1 column across, so only need to draw up for NorthWest

            //  <-----      

            //       |

            //       |

            //

            // OR down and across for SouthWest

            //      

            //       |

            //       |

            //  <-----

            else

            {

                //line up

                xStart = xEnd;

                yStart = yEnd;

                yEnd = _ucdDest.Top + 40;

                _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

                //line across

                xStart = xEnd;

                xEnd = _ucdDest.Right;

                yStart = yEnd;

                _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

                //draw the end arrow

                _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd + 10, yEnd - 5));

                _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd + 10, yEnd + 5));

            }

        }

--------------------编程问答--------------------



/// <summary>

        /// Draws a NorthNonDirect OR SouthNonDirect association line and arrow

        /// </summary>

        private void DrawNorthNonDirect_DrawSouthNonDirect()

        {

            int xStart = _ucdSrc.Left;

            int yStart = _ucdSrc.Top + 40;

            int xEnd = _ucdSrc.Left - (_GenericSpace - (_RandomLineOffSet + Program.GetRandom(_RandomLineOffSet)));

            int yEnd = _ucdSrc.Top + 40;

            //create a dasked line 

            Pen p = new Pen(new SolidBrush(Color.Black));

            p.DashStyle = DashStyle.Dash;

            //line across

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

            //line up

            xStart = xEnd;

            yStart = yEnd;

            yEnd = _ucdDest.Top + 40;

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

            //line across

            xStart = xEnd;

            xEnd = _ucdDest.Left;

            yStart = yEnd;

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

            //draw the end arrow

            _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd - 10, yEnd - 5));

            _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd - 10, yEnd + 5));

        }



        /// <summary>

        /// Draws a EastNonDirect OR WestNonDirect association line and arrow

        /// </summary>

        private void DrawEastNonDirect_DrawWestNonDirect()

        {

            int xStart = _ucdSrc.Right - 20;

            int yStart = _ucdSrc.Top;

            int xEnd = _ucdSrc.Right - 20;

            int yEnd = _ucdSrc.Top - (_GenericSpace - (_RandomLineOffSet + Program.GetRandom(_RandomLineOffSet))); ;

            //create a dasked line 

            Pen p = new Pen(new SolidBrush(Color.Black));

            p.DashStyle = DashStyle.Dash;

            //line up

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

            //line across

            xStart = xEnd;

            yStart = yEnd;

            xEnd = _ucdDest.Right - 20;

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

            //line down

            xStart = xEnd;

            yStart = yEnd;

            yEnd = _ucdDest.Top;

            _g.DrawLine(p, new Point(xStart, yStart), new Point(xEnd, yEnd));

            //draw the end arrow

            _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd - 5, yEnd - 10));

            _g.DrawLine(p, new Point(xEnd, yEnd), new Point(xEnd + 5, yEnd - 10));

        }

        #endregion

    }

    #endregion

}

--------------------编程问答-------------------- 帮你顶！加油 --------------------编程问答-------------------- 本人已经开发好了，需要的话请联系我。。。。

补充：.NET技术 ,  C#