private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
        {
            if (IsWriting)
            {
                return;
            }
            ViewPort.InvTransformPoint(e.Location.X, e.Location.Y);
            ScreenLastPoint = new Point(e.Location.X, e.Location.Y);

            if (e.Button == MouseButtons.Left)
            {
                if (Command != null)
                {
                    //图元绘制
                    if (Command.cMDType == CMDType.PriCommand)
                    {
                        if (StartWriting)
                        {
                            IsWriting = true;
                            TextFunction(e.Location.X, e.Location.Y);
                        }
                    }
                    //图元编辑
                    else if (Command.cMDType == CMDType.PriEditCommand)
                    {
                    }
                    //图形操作
                    else if (Command.cMDType == CMDType.PicCommand)
                    {
                    }
                    Command.MouseUp(e);
                }
                else
                {
                    if (Primitive.CurrentSelectionPrimitive != null)
                    {
                        var  pri        = Primitive.CurrentSelectionPrimitive;
                        bool isContains = Primitive.CurrentSelectedPrimitives.Contains(pri);
                        if (isContains)
                        {
                            Primitive.CurrentSelectedPrimitives.Remove(pri);
                        }
                        else
                        {
                            Primitive.CurrentSelectedPrimitives.Add(pri);
                        }
                        Primitive.CurrentSelectionPrimitive = null;
                    }
                }
            }
            pictureBox1.Invalidate();
        }
        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
            //重点 事件:
            //第一步 判断是否有命令
            //第二步 判断是否编辑
            //第三步 执行命令

            //设置图元选择距离
            Primitive.SelectDistance = ViewPort.SurveyLengthOfOneScreenMillimeter() * 2;
            if (IsWriting)
            {
                return;
            }
            if (Command != null)
            {
                if (Command.cMDType == CMDType.PriCommand)
                {
                    Primitive.SelectEnable = false;
                    Primitive.SnapEnable   = true;
                    if (StartWriting)
                    {
                        TextFunction(e.Location.X, e.Location.Y);
                    }
                }
                else if (Command.cMDType == CMDType.PriEditCommand)
                {
                    Primitive.SelectEnable = true;
                    Primitive.SnapEnable   = false;
                }
                else if (Command.cMDType == CMDType.PicCommand)
                {
                    ;
                }
                ViewPort.InvTransformPoint(e.Location.X, e.Location.Y);
                Command.MouseMove(e);
            }
            else
            {
                ViewPort.InvTransformPoint(e.Location.X, e.Location.Y);
            }
            //鼠标位置
            this.StatusLabelXY.Text = ViewPort.MouseSurveyX.ToString("F3") + "," + ViewPort.MouseSurveyY.ToString("F3");
            pictureBox1.Invalidate();
        }