wftransition.cs

这个是自己制作的工作流设计器,可以可视化的拖拉

            //长或宽的一半
            int halfWfActivityWidthOrHeight = WfActivity.WidthAndHeight / 2;
            // 垂直 x 或 y方向
            // 特殊处理以防止除0
            if (x == 0 || y == 0)
            {
                //如果x=0and y>0为90度y轴-长或宽的一半(确定画图标的位置)　如果x=0and y<0则为270度
                if (x == 0)
                {
                    
                    if (y > 0)
                    {
                        angle = 90;
                        x1 = target.X;
                        y1 = target.Y - halfWfActivityWidthOrHeight;
                    }
                    else
                    {
                        angle = 270;
                        x1 = target.X;
                        y1 = target.Y + halfWfActivityWidthOrHeight;
                    }
                }
                //如果y=0and x>0为0度x轴-长或宽的一半(确定画图标的位置)　如果y=0and x<0则为180度
                else if (y == 0)
                {
                    if (x > 0)
                    {
                        angle = 0;
                        x1 = target.X - halfWfActivityWidthOrHeight;
                        y1 = target.Y;
                    }
                    else
                    {
                        angle = 180;
                        x1 = target.X + halfWfActivityWidthOrHeight;
                        y1 = target.Y;
                    }
                }
            }
            else
            {
                //计算角度　并计算图片的坐标
                double xDIVy = x / y;
                double yDIVx = y / x;
                double c = Math.Atan(xDIVy);
                angle = -(c * 180 / Math.PI);
                angle += 90;
                double c1 = Math.Atan(yDIVx);
                if (xDIVy == 1)
                {
                    if (x > 0)
                    {
                        x1 = target.X - halfWfActivityWidthOrHeight;
                        y1 = target.Y - halfWfActivityWidthOrHeight;
                    }
                    else
                    {
                        angle += 180;
                        x1 = target.X + halfWfActivityWidthOrHeight;
                        y1 = target.Y + halfWfActivityWidthOrHeight;
                    }
                }
                else if (xDIVy == -1)
                {
                    if (x > 0)
                    {
                        angle += 180;
                        x1 = target.X - halfWfActivityWidthOrHeight;
                        y1 = target.Y + halfWfActivityWidthOrHeight;
                    }
                    else
                    {
                        x1 = target.X + halfWfActivityWidthOrHeight;
                        y1 = target.Y - halfWfActivityWidthOrHeight;
                    }
                }
                else if (xDIVy < -1)
                {
                    x1 = halfWfActivityWidthOrHeight;
                    y1 = (int)(x1 / Math.Tan(c));
                    if (x > 0)
                    {
                        angle += 180;
                        x1 = target.X - x1;
                    }
                    else
                    {
                        x1 = target.X + x1;
                    }

                    if (y > 0)
                    {
                        y1 = target.Y + y1;
                    }
                    else
                    {
                        y1 = target.Y - y1;
                    }
                }
                else if (xDIVy > 1)
                {
                    x1 = halfWfActivityWidthOrHeight;
                    y1 = (int)(x1 / Math.Tan(c));
                    if (x > 0)
                    {
                        x1 = target.X - x1;
                    }
                    else
                    {
                        angle += 180;
                        x1 = target.X + x1;
                    }

                    if (y > 0)
                    {
                        y1 = target.Y - y1;
                    }
                    else
                    {
                        y1 = target.Y + y1;
                    }
                }
                else if (xDIVy > -1 && xDIVy < 0)
                {
                    y1 = halfWfActivityWidthOrHeight;
                    x1 = (int)(y1 / Math.Tan(c1));
                    if (x > 0)
                    {
                        angle += 180;
                        x1 = target.X + x1;
                    }
                    else
                    {
                        x1 = target.X - x1;
                    }

                    if (y > 0)
                    {
                        y1 = target.Y - y1;
                    }
                    else
                    {
                        y1 = target.Y + y1;
                    }
                }
                else if (xDIVy < 1 && xDIVy > 0)
                {
                    y1 = halfWfActivityWidthOrHeight;
                    x1 = (int)(y1 / Math.Tan(c1));
                    if (x > 0)
                    {
                        x1 = target.X - x1;
                    }
                    else
                    {
                        angle += 180;
                        x1 = target.X + x1;
                    }

                    if (y > 0)
                    {
                        y1 = target.Y - y1;
                    }
                    else
                    {
                        y1 = target.Y + y1;
                    }
                }
            }
            ImageAttributes imAtt = new ImageAttributes();
            //设置颜色键
            imAtt.SetColorKey(Color.FromArgb(255, 0, 255), Color.FromArgb(255, 0, 255));
            // 画箭头
            Bitmap arrowBitmap = WorkflowDesigner.Properties.Resources.trans_arrow;

            int imgWidth = arrowBitmap.Width;
            int imgHeight = arrowBitmap.Height;

            Rectangle rcDest = new Rectangle();
            rcDest.X = -imgWidth / 2;
            rcDest.Y = -imgHeight / 2;
            rcDest.Width = imgWidth;
            rcDest.Height = imgWidth;


            GraphicsState gs = g.Save();
            //平移（世界变换矩阵平移）
            g.TranslateTransform(x1, y1);
            //根据角度旋转（世界变换旋转）
            g.RotateTransform((float)angle);
            //绘制图片
            g.DrawImage(arrowBitmap, rcDest,
                0, 0,
                imgWidth,
                imgWidth,
                GraphicsUnit.Pixel,
                imAtt);
            //释放
            imAtt.Dispose();
            arrowBitmap.Dispose();
            //还原到原来的表示状态
            g.Restore(gs);


            // sm add
            if ((this.Name != "") || (this.conditions.Count > 0))
            {
                StringFormat format1 = new StringFormat(StringFormatFlags.NoClip);
                format1.Alignment = StringAlignment.Center;
                format1.LineAlignment = StringAlignment.Near;
                Brush brushString = new SolidBrush(Color.Black);
                Font font = new Font("新宋体", 9);
                String Caption = this.Name;
                if (this.conditions.Count > 0)
                {
                    if (Caption != "")
                    {
                        Caption = Caption + "\r\n [" + this.conditions.Count.ToString() + "个判断条件]";

                    }
                    else
                        Caption =" [" + this.conditions.Count.ToString() + "个判断条件]";
                }
                g.DrawString(Caption, font, brushString, new PointF(_x, _y + 9), format1);
                format1.Dispose();
                font.Dispose();
                brushString.Dispose();
            }
        }


        /// <summary>
        /// 移动
        /// </summary>
        /// <param name="offX">移动新位置与原坐标偏移值的x轴坐标</param>
        /// <param name="offY">>移动新位置与原坐标偏移值的y轴坐标</param>
        public override void Move(int offX, int offY)
        {
            //将中心点坐标加上偏移值，得到最新的流转中间调整点
            _x += offX;
            _y += offY;
            //根据中心点坐标绘制调整节点矩形
            _rect = new Rectangle(_x - 4, _y - 4, 8, 8);
        }

        /// <summary>
        /// 打开属性对话框
        /// </summary>
        public override void OpenPropertyDialog()
        {
            TransitionInfoDlg dlg = new TransitionInfoDlg();
            dlg.WfTransition = this;
            //dlg.List = this.conditions;
            dlg.ShowDialog();
            dlg.Dispose();
        }

        /// <summary>
        /// 图形矩阵
        /// </summary>
        /// <returns>返回一个图形矩阵</returns>
        public override Rectangle GetRange()
        {
            return new Rectangle(0, 0, 0, 0);
        }
        #endregion
        #endregion
    }
}