新手入门必看：VectorDraw 常见问题整理大全（五）

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. 选择XRef的实体

问：查找光标下显示的实体的最佳方法是什么？

答：附加的XRef文档在图形中用vdInserts视为vdBlocks。因此，当您附加外部参考文件时，会在文档中添加一个块并插入此块。在vdfCAD中，如果打开图形并单击附加的XRef，您将看到vdInsert对象。

您可以使用以下代码获取您单击的内部实体（vdInsert）：

object ret = vdFramedControl1.BaseControl.ActiveDocument.ActionUtility.getUserPoint();
if (ret is VectorDraw.Geometry.gPoint)
{
    VectorDraw.Geometry.gPoint p1 = vdFramedControl1.BaseControl.ActiveDocument.World2PixelMatrix.Transform(ret as VectorDraw.Geometry.gPoint);
    Point location = new Point((int)p1.x, (int)p1.y);

    // This code will return the xREF as vdInsert
    VectorDraw.Professional.vdPrimaries.vdFigure fig = vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.GetEntityFromPoint(location, vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.Render.GlobalProperties.PickSize, false);
    if (fig != null)
    {
        fig.HighLight = true;
        fig.Invalidate();
        MessageBox.Show("Figure is a : " + fig.ToString());
        fig.HighLight = false;
        fig.Invalidate();
    }

// This code will return the inner entity, this is what you want
    VectorDraw.Professional.vdPrimaries.vdFigure outerfig; // this should be the xREF vdInsert
    VectorDraw.Geometry.Matrix matr = new VectorDraw.Geometry.Matrix();
    VectorDraw.Professional.vdPrimaries.vdFigure innerfig = vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.GetInnerEntityFromPoint(out matr, out outerfig, location, vdFramedControl1.BaseControl.ActiveDocument.ActiveLayOut.Render.GlobalProperties.PickSize, false);
    if (innerfig != null && outerfig != null)
    {
        innerfig.HighLight = true; //This is the inner entity you want.
        innerfig.Invalidate();
        MessageBox.Show("Figure is a : " + innerfig.ToString() + " contained in " + outerfig.ToString());
        innerfig.HighLight = false;
        innerfig.Invalidate();
    }
}

二. 将LineType Penstyle设置为Render

问：如何更改渲染对象的线型（solid，dashdot等）？我知道vdLineType可以在Vdraw.BaseControl.ActiveDocument.LineTypes中选择，但我找不到渲染线类型的类似集合。

答：在空项目中添加一个调用cmdLine“user”和VDScrollable控件的按钮。添加OnActionDraw事件处理程序，并在ActiveDocument_OnActionDraw中使用如下代码：

void ActiveDocument_OnActionDraw(object sender, object action, bool isHideMode, ref bool cancel)
{
    if (!(action is VectorDraw.Actions.ActionGetRefPoint)) return;
    VectorDraw.Actions.BaseAction act = action as VectorDraw.Actions.BaseAction;
    VectorDraw.Geometry.gPoint refpoint = act.ReferencePoint;
    VectorDraw.Geometry.gPoint currentpoint = act.OrthoPoint;

    // Draw the circle using vdCircle object 

    VectorDraw.Professional.vdFigures.vdCircle circle = new VectorDraw.Professional.vdFigures.vdCircle();
    circle.SetUnRegisterDocument(vdSC.BaseControl.ActiveDocument);
    circle.setDocumentDefaults();
    circle.LineType = vdSC.BaseControl.ActiveDocument.LineTypes.DPIDashDotDot; // The Linetype here
    circle.Center = VectorDraw.Geometry.gPoint.MidPoint(refpoint, currentpoint);
    circle.Radius = circle.Center.Distance3D(refpoint);
    circle.Draw(act.Render);

    // OR you can use the Render.Draw....

    act.Render.PushPenstyle(Color.Red, 0.1d, vdSC.BaseControl.ActiveDocument.LineTypes.FindName("CENTER").GetgrLineType());
    act.Render.DrawLine(sender, new VectorDraw.Geometry.gPoint(0, 0, 0), currentpoint);
    act.Render.PopPenstyle(); // THIS IS NECESSARY after every push
}

三. 使用打印机导出到光栅和PDF / SVG / EMF / HPGL文件

问：如何使用打印机导出到光栅JPG / BMP / TIF / GIF和PDF / SVG / EMF / HPGL文件？

答：在版本6010及更高版本中，vdPrinter对象可用于将整个图形或部分图形导出为栅格（BMP JPG GIF TIF）和PDF，SVG，HPGL和EMF文件。下面是C＃中可用于此的示例代码：

private void button1_Click(object sender, EventArgs e)
{

// Except for EMF, the same can be done with PDF, BMP, JPG, SVG, HPG (HPGL)
// From version 6010 and above the printer can be used in order to export an area or the whole drawing in a
// raster format (BMP, JPG), PDF, SVG, or HGPL

#region create simple drawing
   //create a simple drawing
   vdFC.BaseControl.ActiveDocument.New();
    vdFC.BaseControl.ActiveDocument.CommandAction.CmdBox3d(new VectorDraw.Geometry.gPoint(10, 10), 10, 12, 14, 10);
    vdFC.BaseControl.ActiveDocument.CommandAction.CmdCircle(new VectorDraw.Geometry.gPoint(3, 3), 5.0d);
#endregion

#region save as EMF the Extends using fixed EMF width
   //save as EMF the Extends using fixed EMF width
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrinterName = "c:\\test_extends.emf"; // or PDF bmp jpg svg
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution=96; //Screen DPI
   VectorDraw.Geometry.Box Extends= vdFC.BaseControl.ActiveDocument.ActiveLayOut.Entities.GetBoundingBox(true,true);
   int EMFwidth = 500; //fixed width
   int EMFheight = (int) (EMFwidth * Extends.Height/Extends.Width); // keep propotions
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.paperSize = new Rectangle(0, 0, (int)(EMFwidth * 100 / vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution), (int)(EMFheight * 100 / vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution));
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintExtents();
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintScaleToFit();
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintOut();
#endregion

#region save as EMF the screen using fixed EMF height
   //save as EMF the screen using fixed EMF height
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrinterName = "c:\\test_screen.emf"; // or PDF bmp jpg svg
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution = 96; //Screen DPI
   VectorDraw.Geometry.Box screen_Box = new VectorDraw.Geometry.Box();
   double screen_width = vdFC.BaseControl.ActiveDocument.ActiveLayOut.PixelSize * vdFC.BaseControl.Width;
   double screen_height = vdFC.BaseControl.ActiveDocument.ActiveLayOut.ViewSize;
    screen_Box.AddPoint(vdFC.BaseControl.ActiveDocument.ActiveLayOut.ViewCenter - new VectorDraw.Geometry.gPoint(screen_width / 2.0d, screen_height / 2.0d));
    screen_Box.AddPoint(vdFC.BaseControl.ActiveDocument.ActiveLayOut.ViewCenter + new VectorDraw.Geometry.gPoint(screen_width / 2.0d, screen_height / 2.0d));
    EMFheight = 500; // this is fixed
   EMFwidth = (int)(EMFheight * screen_width / screen_height); //keeping the propotion
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.paperSize = new Rectangle(0, 0, (int)(EMFwidth * 100 / vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution), (int)(EMFheight * 100 / vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution));
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintWindow = screen_Box; // Here the code can be changed so
    // the user can select a rectangle in screen and this area is saved to file.
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintScaleToFit();
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintOut();
#endregion

#region call the PrintPreview in order the user to select the area to export to file
   // call the PrintPreview in order the user to select the area to export to file
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrinterName = "*.emf"; // Using *.emf or *.pdf etc the print dialog will prompt a dialog to input the file name
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution = 96; //Screen DPI
   EMFwidth = 500; //fixed width
   EMFheight = 500; // and height
   vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.paperSize = new Rectangle(0, 0, (int)(EMFwidth * 100 / vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution), (int)(EMFheight * 100 / vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.Resolution));
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintExtents();
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.PrintScaleToFit();
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.InitializePreviewFormProperties(true, true, false, false);
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.CenterDrawingToPaper();
    vdFC.BaseControl.ActiveDocument.ActiveLayOut.Printer.DialogPreview();
#endregion

}

使用VDF Wrapper ActiveX（vdraw.ocx）和VectorDraw.Geometry.tlb以及VectorDraw.Professional.tlb，您可以使用以下代码执行相同操作：

Private Sub Command1_Click()
 Dim doc As VectorDraw_Professional.vdDocument
 Dim box As Variant
 Dim EMFwidth As Long 
 Dim EMFheight As Long
 Dim extends As New VectorDraw_Geometry.box

    Set doc = VDraw1.ActiveDocument.WrapperObject
    
    doc.ActiveLayOut.Printer.PrinterName = App.Path + "\10165.emf"
    doc.ActiveLayOut.Printer.Resolution = 96

    extends.AddBox doc.ActiveLayOut.entities.GetBoundingBox(True, False)
    extends.Transformby doc.World2ViewMatrix
    extends.AddWidth doc.ActiveLayOut.Render.PixelSize * CDbl(0.5)
    
    EMFwidth = 1000
    EMFheight = CLng(EMFwidth * extends.Height / extends.Width + 0.5)

    doc.ActiveLayOut.Printer.SelectPaper "CUSTOM"
    doc.ActiveLayOut.Printer.MARGINS.Top = 0
    doc.ActiveLayOut.Printer.MARGINS.Bottom = 0
    doc.ActiveLayOut.Printer.MARGINS.Left = 0
    doc.ActiveLayOut.Printer.MARGINS.Right = 0
    doc.ActionLayout.Printer.Update
    
    VDraw1.ActiveDocument.ActiveLayOut.Printer.ActivePaperWidth = CLng(100# * CDbl(EMFwidth)  / CDbl(doc.ActiveLayOut.Printer.Resolution))
    VDraw1.ActiveDocument.ActiveLayOut.Printer.ActivePaperHeight = CLng(100# * CDbl(EMFheight) / CDbl(doc.ActiveLayOut.Printer.Resolution))
    
    
    Set doc.ActiveLayOut.Printer.PrintWindow = extends
    doc.ActiveLayOut.Printer.PrintScaleToFit
    doc.ActiveLayOut.Printer.PrintOut
End Sub

未完待续......