新手入门必看：VectorDraw 常见问题整理大全（十二）

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VectorDraw Developer Framework（VDF）是一个用于应用程序可视化的图形引擎库。有了VDF提供的功能，您可以轻松地创建、编辑、管理、输出、输入和打印2D和3D图形文件。该库还支持许多矢量和栅格输入和输出格式，包括本地PDF和SVG导出。

【VectorDraw Developer Framework最新版下载】

VectorDraw web library (javascript)是一个矢量图形库。VectorDraw web library (javascript)不仅能打开CAD图纸，而且能显示任何支持HTML5标准平台上的通用矢量对象，如Windows，安卓，iOS和Linux。无需任何安装，VectorDraw web library (javascript)就可以运行在任何支持canvas标签和Javascript的主流浏览器（Chrome, Firefox, Safari, Opera, Dolphin, Boat等等）中。

【VectorDraw web library (javascript)最新版下载】

一. 为user-SaveAs提出路径，文件名和版本

问：如何向用户-SaveAs提出路径，文件名（文件类型）和版本？

答：创建一个新的C＃项目，并在表单中添加一个vdFramed控件和一个按钮。然后使用如下代码：

   public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private string GetSaveDlgFilterFormats()

        {

            string filetypes = "";

            filetypes += "VDML (*.vdml)|*.vdml|";

            filetypes += "vdcl (*.vdcl)|*.vdcl|";

            filetypes += "DXF 2004 (*.dxf)|*.dxf|";

            filetypes += "DXF 2000 (*.dxf)|*.dxf|";

            filetypes += "DXF 12 (*.dxf)|*.dxf|";

            filetypes += "|";

            return filetypes;

        }

        public string GetSaveFileNameDlg(ref string version)

        {

            SaveFileDialog saveFileDialog1 = new SaveFileDialog();

            saveFileDialog1.Filter = GetSaveDlgFilterFormats();



            if (version == "") version = vdFramedControl1.BaseControl.ActiveDocument.Version.ToUpper();

            string defaultFileName = vdFramedControl1.BaseControl.ActiveDocument.FileName;

            if (defaultFileName == "") defaultFileName = "VectorDraw"; // use your default name here

            if (defaultFileName != null && defaultFileName != "")

            {

                saveFileDialog1.FileName = VectorDraw.Professional.Utilities.vdGlobals.GetFileNameWithoutExtension(defaultFileName);

                saveFileDialog1.InitialDirectory = VectorDraw.Professional.Utilities.vdGlobals.GetDirectoryName(defaultFileName);

                int FilterIndex = 1;

                if (defaultFileName.EndsWith(".dxf", StringComparison.InvariantCultureIgnoreCase))

                {

                    switch (version)

                    {

                        case "DXF2004":

                            FilterIndex = 3;

                            break;

                        case "DXF2000":

                            FilterIndex = 4;

                            break;

                        case "DXF12":

                            FilterIndex = 5;

                            break;

                        default:

                            break;

                    }

                }

                saveFileDialog1.FilterIndex = FilterIndex;

            }



            saveFileDialog1.RestoreDirectory = true;

            DialogResult res = saveFileDialog1.ShowDialog(this);

            Application.DoEvents();

            if (res != DialogResult.OK) return null;

            switch (saveFileDialog1.FilterIndex)

            {

                case 3:

                    version = "DXF2004";

                    break;

                case 4:

                    version = "DXF2000";

                    break;

                case 5:

                    version = "DXF12";

                    break;

                default:

                    break;

            }

            return saveFileDialog1.FileName;

        }



        private void saveas_Click(object sender, EventArgs e)

        {//VDF,VDI,VDCL,VDML does not have versions.

            string version = "DXF12";//propose this version or "DXF2000" or "DXF2004". Change to an empty string so the version of existing document will be selected.

            vdFramedControl1.BaseControl.ActiveDocument.Filename= @"c:\temp\mydrawing.dxf"; // use the proposed path and the proposed name here



            string fname = GetSaveFileNameDlg(ref version); // the filename (including path) that user chose

            if (fname == null) return; // user canceled save.

            vdFramedControl1.BaseControl.ActiveDocument.SaveAs(fname, null, version);

        }

    }

二. 在CmdCircle处于活动状态时在工具提示中显示圆的半径

问：当CmdCircle处于活动状态时，如何在工具提示中显示圆的半径？

答：在表单中放置vdFramedControl和一个简单的按钮。然后检查以下代码：

private void Form1_Load(object sender, EventArgs e)
{
       vdFramedControl1.BaseControl.ActiveDocument.OnActionJobLoop += new VectorDraw.Professional.vdObjects.vdDocument.ActionJobLoopEventHandler(ActiveDocument_OnActionJobLoop);
}

private bool CmdCircleStarted = false;
private void button1_Click(object sender, EventArgs e)
{
       CmdCircleStarted = true;
       vdFramedControl1.BaseControl.ActiveDocument.CommandAction.CmdCircle("USER", "USER");
       vdFramedControl1.BaseControl.ActiveDocument.ToolTipText = "";
       CmdCircleStarted = false;
}

void ActiveDocument_OnActionJobLoop(object sender, object action, ref bool cancel)
{
      if (!CmdCircleStarted) return;
      VectorDraw.Professional.CommandActions.ActionCircle act = action as VectorDraw.Professional.CommandActions.ActionCircle;  
      if (act == null) return;
      VectorDraw.Professional.vdFigures.vdCircle circle = act.Entity as VectorDraw.Professional.vdFigures.vdCircle;
      if (circle == null) return;
      vdFramedControl1.BaseControl.ActiveDocument.ToolTipText = "Radius: " + vdFramedControl1.BaseControl.ActiveDocument.lunits.FormatLength (circle.Radius);
}

三. 计算视口中显示的对象的位置

问：如何计算视口内显示的对象布局中的位置？

答：在新的C＃（Windows窗体）项目中添加vdFramed控件和2个按钮。然后添加以下代码：

public Form1()
{
                InitializeComponent();
}

ulong textHandle = 0;
ulong circHandle = 0;
ulong viewpHandle = 0;
short ColorInd = 40;

private void Form1_Load(object sender, EventArgs e)
{//create a circle, a text (these points will be calculated) a Layout and a Viewport.

vdFramedControl1.BaseControl.ActiveDocument.New();
//create a circle
VectorDraw.Professional.vdFigures.vdCircle circ = new VectorDraw.Professional.vdFigures.vdCircle();
circ.SetUnRegisterDocument(vdFramedControl1.BaseControl.ActiveDocument);
circ.setDocumentDefaults();
circ.Center = new VectorDraw.Geometry.gPoint(-3, -2, .5);
circ.Radius = (double)3.3;
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.Entities.AddItem(circ);
circHandle = circ.Handle.Value;

//create a text
VectorDraw.Professional.vdFigures.vdText txt = new VectorDraw.Professional.vdFigures.vdText();
txt.SetUnRegisterDocument(vdFramedControl1.BaseControl.ActiveDocument);
txt.setDocumentDefaults();
txt.InsertionPoint = new VectorDraw.Geometry.gPoint(3, 1, 3.5);
txt.TextString = "Find WCoords in Layout";
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.Entities.AddItem(txt);
textHandle = txt.Handle.Value;

//create a Layout
VectorDraw.Professional.vdPrimaries.vdLayout lay = new VectorDraw.Professional.vdPrimaries.vdLayout();
lay.SetUnRegisterDocument(vdFramedControl1.BaseControl.ActiveDocument);
lay.setDocumentDefaults();
lay.Name = "MyLayout1";
lay.ShowUCSAxis = false;
vdFramedControl1.BaseControl.ActiveDocument.LayOuts.AddItem(lay);

//create a Viewport
VectorDraw.Professional.vdFigures.vdViewport view = new VectorDraw.Professional.vdFigures.vdViewport();
view.SetUnRegisterDocument(vdFramedControl1.BaseControl.ActiveDocument);
view.setDocumentDefaults();
view.ShowUCSAxis = false;
view.Height = 100;
view.Width = 150;
view.Center = new VectorDraw.Geometry.gPoint(100.0, 230.0);
view.ViewCenter = new VectorDraw.Geometry.gPoint(4.4008, 1.8233);
view.ViewSize = 17.0;
view.PenColor.SystemColor = Color.Red;
view.PenWidth = 1.0d;

//And add this viewport to the entities of the first layout.
lay = vdFramedControl1.BaseControl.ActiveDocument.LayOuts.FindName("MyLayout1");
if (lay != null) lay.Entities.AddItem(view);
viewpHandle = view.Handle.Value;
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut = lay;//change the view to the MyLayout1
vdFramedControl1.BaseControl.ActiveDocument.Redraw(false);

}

private void buttonCalculatePoints_Click(object sender, EventArgs e)
{// this code will calculate (in WorldCS) the points of the two entities that are shown inside the viewport

//get the entities from their handles 
VectorDraw.Professional.vdFigures.vdCircle onecircle = vdFramedControl1.BaseControl.ActiveDocument.FindFromHandle(new VectorDraw.Professional.vdObjects.vdHandle(circHandle), typeof(VectorDraw.Professional.vdPrimaries.vdFigure)) as VectorDraw.Professional.vdFigures.vdCircle;
VectorDraw.Professional.vdFigures.vdText onetext = vdFramedControl1.BaseControl.ActiveDocument.FindFromHandle(new VectorDraw.Professional.vdObjects.vdHandle(textHandle), typeof(VectorDraw.Professional.vdPrimaries.vdFigure)) as VectorDraw.Professional.vdFigures.vdText;
//get the points to calculate (center point of the circle and insertion point of the text) 
VectorDraw.Geometry.gPoint CircPt = new VectorDraw.Geometry.gPoint(onecircle.Center); // circle's center point in WCS
VectorDraw.Geometry.gPoint TextPt = new VectorDraw.Geometry.gPoint(onetext.InsertionPoint);// text's insertion point in WCS
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut = vdFramedControl1.BaseControl.ActiveDocument.LayOuts[0];
VectorDraw.Professional.vdFigures.vdViewport viewport = new VectorDraw.Professional.vdFigures.vdViewport();

//get the viewport and set it to active in order to get the transformation matrix 
viewport = vdFramedControl1.BaseControl.ActiveDocument.FindFromHandle(new VectorDraw.Professional.vdObjects.vdHandle(viewpHandle), typeof(VectorDraw.Professional.vdPrimaries.vdFigure)) as VectorDraw.Professional.vdFigures.vdViewport;

vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.ActiveViewPort = viewport;
vdFramedControl1.BaseControl.ActiveDocument.Redraw(true);

//do the transformations  and calculate the points
VectorDraw.Geometry.gPoint ptC = vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.ActiveViewPort.Render.WorldToView(CircPt); // circle's center in Viewport's view coordinates
VectorDraw.Geometry.gPoint ptT = vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.ActiveViewPort.Render.WorldToView(TextPt);// text's insertion point in Viewport's view coordinates
VectorDraw.Geometry.gPoint ptT1 = new VectorDraw.Geometry.gPoint(); // in world coordinates
VectorDraw.Geometry.gPoint ptC1 = new VectorDraw.Geometry.gPoint();//in world coordinates

vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.ActiveViewPort = null;
VectorDraw.Geometry.Matrix mat = new VectorDraw.Geometry.Matrix();
mat.ScaleMatrix(1 / viewport.ViewportScale, 1 / viewport.ViewportScale, 1 / viewport.ViewportScale);
mat.TranslateMatrix(viewport.Center);
mat.TransformPt(ptT - viewport.ViewCenter, ptT1);
mat.TransformPt(ptC - viewport.ViewCenter, ptC1);

// Create a line to connect the two calculated points
VectorDraw.Professional.vdFigures.vdLine lin = new VectorDraw.Professional.vdFigures.vdLine();
lin.SetUnRegisterDocument(vdFramedControl1.BaseControl.ActiveDocument);
lin.setDocumentDefaults();
lin.StartPoint = new VectorDraw.Geometry.gPoint(ptT1.x,ptT1.y,(double)0.0); // the insertion point of the text in World coordinates in the Layout
lin.EndPoint = new VectorDraw.Geometry.gPoint(ptC1.x, ptC1.y, (double)0.0); // the center point of the circle in World coordinates in the Layout 
// z is set to zero as it is not needed in Paper spaces
lin.PenColor.ColorIndex = ColorInd;
ColorInd += 1;
lin.Invalidate();
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.Entities.AddItem(lin);

}

private void buttonChangeViewport_Click(object sender, EventArgs e)
{ // Change the viewport so the circle and text are shown in different position, then press the calculate button.

VectorDraw.Professional.vdFigures.vdViewport viewport = new VectorDraw.Professional.vdFigures.vdViewport();
viewport = vdFramedControl1.BaseControl.ActiveDocument.FindFromHandle(new VectorDraw.Professional.vdObjects.vdHandle(viewpHandle), typeof(VectorDraw.Professional.vdPrimaries.vdFigure)) as VectorDraw.Professional.vdFigures.vdViewport;
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.ActiveViewPort = viewport;
vdFramedControl1.BaseControl.ActiveDocument.CommandAction.View3D("vise");
viewport.ViewCenter = new VectorDraw.Geometry.gPoint(5, -4);
viewport.ViewSize = 30;
vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.ActiveViewPort = null;
viewport.Update();
viewport.Invalidate();

}

敬请期待接下来的教程连载~