Bentley二次开发教程27-交互窗口-案例实战1-可视化矩形梁生成工具

为了展现在MicroStation二次开发中使用WinForm界面控件与MicroStation内的数据交互，这里我们使用三个案例进行展示，分别为可视化矩形梁生成工具，EC属性赋值工具与文件选择复制工具。

可视化矩形梁生成工具

该工具会根据用户输入的数据实时在Panel中的用户控件中对截面信息进行预览，确定截面信息无误后点击确认会启动交互式工具，根据用户输入的信息生成矩形梁截面，通过交互式工具用户点击的位置确认矩形梁的起点与终点。
该工具涉及到的WinForm控件有：Label，TextBox，Button，Panel，UserControl（用户自定义控件）。

using Bentley.DgnPlatformNET;
    class CreateDimensionCallbacks : DimensionCreateData
    {
        private DimensionStyle m_dimStyle;
        private DgnTextStyle m_textStyle;
        private Symbology m_symbology;
        private LevelId m_levelId;
        private DirectionFormatter m_directionFormatter;
        public CreateDimensionCallbacks(DimensionStyle dimStyle, DgnTextStyle textStyle, Symbology symb, LevelId levelId, DirectionFormatter formatter)
        {
            m_dimStyle = dimStyle;
            m_textStyle = textStyle;
            m_symbology = symb;
            m_levelId = levelId;
            m_directionFormatter = formatter;
        }

        public override DimensionStyle GetDimensionStyle()
        {
            return m_dimStyle;
        }

        public override DgnTextStyle GetTextStyle()
        {
            return m_textStyle;
        }

        public override Symbology GetSymbology()
        {
            return m_symbology;
        }

        public override LevelId GetLevelId()
        {
            return m_levelId;
        }

        public override int GetViewNumber()
        {
            return 0;
        }

        //此函数返回的旋转矩阵与GetViewRotation返回的旋转矩阵共同声明了尺寸标注元素的方向
        public override DMatrix3d GetDimensionRotation()
        {
            return DMatrix3d.Identity;
        }

        public override DMatrix3d GetViewRotation()
        {
            return DMatrix3d.Identity;
        }

        //用于从数字方向值构造字符串。
        public override DirectionFormatter GetDirectionFormatter()
        {
            return m_directionFormatter;
        }
    }
}

namespace WinformUIIntroduction.UI
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(62, 47);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(100, 20);
            this.textBox2.TabIndex = 2;
            this.textBox2.Text = "500";
            this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
            this.textBox2.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox2_KeyPress);
            // 
            // button1
            // 
            this.button1.Font = new System.Drawing.Font("Microsoft YaHei UI", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.button1.Location = new System.Drawing.Point(41, 210);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 3;
            this.button1.Text = "确认";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // BeamCreateMenu
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(397, 261);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.panel_view);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
            this.MaximizeBox = false;
            this.Name = "BeamCreateMenu";
            this.ShowIcon = false;
            this.Text = "BeamCreateMenu";
            this.TopMost = true;
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Panel panel_view;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Button button1;
    }
}

extern alias dgnDisplayAlias;
using System.Windows.Forms;
using System.Windows.Forms.Integration;
using dgnDisplayAlias::Bentley.DgnPlatform;

namespace WinformUIIntroduction.UI
{
    public partial class PreviewPanel : UserControl
    {
        private readonly dgnDisplayAlias::Bentley.DgnPlatform.PreviewControl mPreviewControl;
        public PreviewPanel(Bentley.DgnPlatformNET.DgnModelRef modelRef)
        {
            InitializeComponent();
            
            unsafe
            {
                this.mPreviewControl =
                    new dgnDisplayAlias::Bentley.DgnPlatform.PreviewControl(
                        (dgnDisplayAlias::Bentley.DgnPlatform.DgnModel*)modelRef.GetDgnModel().GetNative());
            }
            this.mPreviewControl.ActivatePanTool();
            this.mPreviewControl.PreviewControlOptions.IsFitToolVisible = true;

            this.mPreviewControl.PreviewControlOptions.IsPanToolVisible = true;
            this.mPreviewControl.PreviewControlOptions.IsViewingToolsVisible = true;
            this.mPreviewControl.PreviewControlOptions.IsZoomToolsVisible = true;
            this.mPreviewControl.PreviewControlOptions.IsRotationToolVisible = true;
     
            this.mPreviewControl.IsEnabled = true;
            this.mPreviewControl.IsManipulationEnabled = true;

            this.mPreviewControl.PreviewControlOptions.RotationMode = RotationMode.Top;
            this.mPreviewControl.PreviewControlOptions.RenderMode = RenderMode.FilledVisibleEdge;

            ElementHost elementHost = new ElementHost();
            elementHost.Dock = DockStyle.Fill;
            elementHost.Child = this.mPreviewControl;
            this.Controls.Add(elementHost);
        }

        public void ShowPreview(Bentley.DgnPlatformNET.Elements.Element ele)
        {
            Bentley.DgnPlatformNET.ElementAgenda agenda = new Bentley.DgnPlatformNET.ElementAgenda();
            if (ele != null)
            {
                agenda.Insert(ele, true);
            }
            this.mPreviewControl.ShowPreview(agenda);
        }
    }
}

using Bentley.DgnPlatformNET;
            else
            {
                EndDynamics();//关闭动态绘制
                m_pos.Clear();//清空列表                
            }
            return true;
        }

        protected override void OnDynamicFrame(DgnButtonEvent ev)//动态绘制时触发
        {
            ShapeElement m_beamProfile = CreateBeamProfile(m_pos[0]);//创建形元素用于确定梁截面
            Element element = CreateSolidElement(m_pos[0], ev.Point,m_beamProfile);//创建梁实体元素
            if (null == element)//若未成功生成梁实体元素
                return;//返回
            DynamicDrawElems(element);//动态绘制元素            
        }

        private ShapeElement CreateBeamProfile(DPoint3d startPo)//创建用于表达梁截面的形元素
        {
            DPoint3d[] pos =
            {
                new DPoint3d(startPo.X-0.5*UI.BeamCreateMenu.m_width*m_uorPerMilliMeter,startPo.Y,startPo.Z),
                new DPoint3d(startPo.X-0.5*UI.BeamCreateMenu.m_width*m_uorPerMilliMeter,startPo.Y,startPo.Z-1*UI.BeamCreateMenu.m_height*m_uorPerMilliMeter),
                new DPoint3d(startPo.X+0.5*UI.BeamCreateMenu.m_width*m_uorPerMilliMeter,startPo.Y,startPo.Z-1*UI.BeamCreateMenu.m_height*m_uorPerMilliMeter),
                new DPoint3d(startPo.X+0.5*UI.BeamCreateMenu.m_width*m_uorPerMilliMeter,startPo.Y,startPo.Z)
            };//确定梁截面端点坐标集
            ShapeElement beamProfile = new ShapeElement(m_dgnModel,null,pos);//创建表达梁截面的形元素
            return beamProfile;//返回梁截面的形元素
        }

        private void DynamicDrawElems(Element element)
        {
            RedrawElems redrawElems = new RedrawElems();//使用元素用于动态绘制
            redrawElems.SetDynamicsViewsFromActiveViewSet(Session.GetActiveViewport());//设置视角
            redrawElems.DrawMode = DgnDrawMode.TempDraw;//设置绘制模式
            redrawElems.DrawPurpose = DrawPurpose.Dynamics;//设置绘制目标

            redrawElems.DoRedraw(element);//使用元素用于动态绘制
        }

        private Element CreateSolidElement(DPoint3d startPo, DPoint3d endPo, ShapeElement beamProfile)
        {
            DVector3d vector = new DVector3d(startPo, endPo);//声明梁方向向量
            if (vector == DVector3d.Zero)//判断是否成功获取
            {
                return null;//返回空
            }           
            TransformInfo trans = new TransformInfo(DTransform3d.FromRotationAroundLine(startPo, DVector3d.UnitZ, vector.Rotate90CCWXY().AngleXY));//声明变换信息
            beamProfile.ApplyTransform(trans);//对形元素施加变换
            Element solid = SolidElement.CreateProjectionElement(m_dgnModel, null, beamProfile, startPo, vector, DTransform3d.Identity, true);//创建拉伸实体
            return solid;//返回拉伸实体
        }

        private void CreateBeamElem()
        {
            ShapeElement beamProfile= CreateBeamProfile(m_pos[0]);//创建表达梁截面的形元素
            Element element = CreateSolidElement(m_pos[0], m_pos[1], beamProfile);//创建拉伸元素
            element.AddToModel();//将拉伸元素写入模型
        }
    }
}