新手入门必看：VectorDraw 常见问题整理大全（七）

本教程整理了VectorDraw 最常见问题，教程整理的很齐全，非常适合新手学习，希望对大家有一定的帮助！

【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. 从一个点选择实体（提供四种方法）

问：如何从单个点选择锁定/未锁定图层中的实体/p>

            gPoint pt = vdScrollableControl1.BaseControl.ActiveDocument.ActionUtility.getUserPoint() as gPoint;and for the Selection Set :            vdSelection selectionSet = null;            selectionSet = vdScrollableControl1.BaseControl.ActiveDocument.Selections.FindName(name);            if (selectionSet == null)            {                selectionSet = vdScrollableControl1.BaseControl.ActiveDocument.Selections.Add(name);            }            gPoint p1 = m_ActiveDoc.World2PixelMatrix.Transform(pt as gPoint);

方法1：使用RenderSelect.SelectingMode.SingleEntitiyPoint进行选择

这将获得最顶层的实体。如果此实体位于锁定图层中，则返回的selectionSet将为空

            // Selection with RenderSelect.SelectingMode.SingleEntitiyPoint            gPoints points = new gPoints();            selectSet.RemoveAll();            points.Add(pt);            selectSet.Select(RenderSelect.SelectingMode.SingleEntitiyPoint, points);            if (selectSet.Count > 0)            {                foreach (vdFigure fig in selectSet)                {                    MessageBox.Show("Found figure with Handle " + fig.HandleId.ToString() + " in Layer: " + fig.Layer.Name + " which is locked: " + fig.Layer.Lock.ToString(), "[Select with SingleEntitiyPoint]");                }            }            else            {                MessageBox.Show("No object selected","[Select with SingleEntitiyPoint]");            }

方法2：使用GetEntityFromPoint选择选择

即使此实体位于锁定层中，也将获得最顶层实体。

            // Selection with GetEntityFromPoint            Point location1 = new Point((int)p1.x, (int)p1.y);            vdFigure fig2 = m_ActiveDoc.ActiveLayOut.GetEntityFromPoint(location1, m_ActiveDoc.ActiveLayOut.Render.GlobalProperties.PickSize, false);            if (fig2 != null)            {                MessageBox.Show("Found figure with Handle: " + fig2.HandleId.ToString() + " in Layer: " + fig2.Layer.Name + " which is locked: " + fig2.Layer.Lock.ToString(),"[Select with GetEntityFromPoint]" );            }            else            {                MessageBox.Show("No object selected", "[Select with GetEntityFromPoint]");            }

方法3：使用RenderSelect.SelectingMode.CrossingWindowRectangle和光标的PickSize进行选择

这将获得当前点+ picksize中的所有实体，但不会获取锁定图层中的实体

            // Selection with RenderSelect.SelectingMode.CrossingWindowRectangle and the cursors PickSize            selectSet.RemoveAll();            gPoints points2 = new gPoints();            int size = m_ActiveDoc.ActiveLayOut.Render.GlobalProperties.PickSize;            Point location2 = new Point((int)p1.x-size/2, (int)p1.y-size/2);            Point location3 = new Point((int)p1.x+size/2, (int)p1.y+size/2);            points2.Add(m_ActiveDoc.ActiveLayOut.Render.Pixel2View(location2));            points2.Add(m_ActiveDoc.ActiveLayOut.Render.Pixel2View(location3));                selectSet.Select(RenderSelect.SelectingMode.CrossingWindowRectangle, points2);            if (selectSet.Count > 0)            {                foreach (vdFigure fig in selectSet)                {                    MessageBox.Show("Found figure with Handle " + fig.HandleId.ToString() + " in Layer: " + fig.Layer.Name + " which is locked: " + fig.Layer.Lock.ToString(), "[Select with CrossingWindowRectangle & PickSize]");                }            }            else            {                MessageBox.Show("No object selected", "[Select with CrossingWindowRectangle & PickSize]");            }

方法4：使用Select3D和光标的PickSize选择

这将获得当前点中的所有实体+ picksize甚至锁定图层中的实体

注意：Select3d方法不适用于Handle属性大于UInt的实体（32位）无符 整数）。

            // Selection using Select3D and cursor's picksize            Point location4 = new Point((int)p1.x , (int)p1.y );            vdEntities ents = m_ActiveDoc.Select3d(location4, m_ActiveDoc.ActiveLayOut.Render.GlobalProperties.PickSize);            if (ents.Count > 0)            {                foreach (vdFigure fig in ents)                {                    MessageBox.Show("Found figure with Handle " + fig.HandleId.ToString() + " in Layer: " + fig.Layer.Name + " which is locked: " + fig.Layer.Lock.ToString(), "[Select with Select3d & PickSize]");                }            }            else            {                MessageBox.Show("No object selected", "[Select with Select3d & PickSize]");            }

二. 在打印期间，DrawAfter事件使用render.PrinterMode PRINT_PRINTER多次触发

问：在C＃中使用vdProControl并在打印期间使用render.PrinterMode = PRINT_PRINTER多次触发DrawAfter事件/p>

答：根据打印机及其分辨率，VDF将纸张分割成区域，以便可以在大型打印机中打印，这是因为图纸可能包含大尺寸位图，或者只能打印为位图（如3D渲染模式）。VDF 6中的渲染在版本5中发生了很大变化，这就是您遇到问题的原因。代码应该写成不同的代码：

如果你使用PRINT_PRINTER，那么你应该绘制你喜欢它们是绘图单位中的实际对象的对象，例如：

if (render.PrinterMode == VDrawI5.VdConstPrintMode.PRINT_PRINTER){    VDrawI5.vdPrint printer = vdProControl.ActiveDocument.Printer;    double[] rect = printer.PrintWindow as double[];    double[] bottomLeft = new double[] { rect[0],rect[1] };    double[] topRight = new double[] { rect[2], rect[3] };    render.Select_Pen(VDrawI5.VdConstPen.VdPenSolid, 1, 0);    render.PushMatrix();    render.SelectWorldMatrix();    render.Drawline(bottomLeft[0], bottomLeft[1], 0, topRight[0], topRight[1], 0, 0);    render.Drawline(topRight[0], bottomLeft[1], 0, bottomLeft[0], topRight[1], 0, 0);    render.Drawcircle((bottomLeft[0] + topRight[0]) / 2, (bottomLeft[1] + topRight[1]) / 2, 0, (-bottomLeft[1] + topRight[1]) / 2);    render.PopMatrix();}

if {}内的代码将运行4次（或者更多地取决于打印机/纸张/分辨率），并且只有部分线条/圆圈将在每个“区域”中呈现并绘制你喜欢的内容。

如果你使用PRINT_PRINTER_PAPER，那么你应该像你一样使用代码，这里的问题是你设置笔（颜色，类型，宽度），如：

if (render.PrinterMode == VDrawI5.VdConstPrintMode.PRINT_PRINTER_PAPER){    Console.WriteLine(render.PrinterMode.ToString());    render.Select_Pen(VDrawI5.VdConstPen.VdPenSolid, 1, 0);    double[] bottomLeft = new double[3];    double[] topRight = new double[3];    int left = 0, top = 0, right = 0, bottom = 0;    render.GetWindowExt(ref left, ref top, ref right, ref bottom);    render.PixelToView(left, bottom, ref bottomLeft[0], ref bottomLeft[1]);    render.PixelToView(right, top, ref topRight[0], ref topRight[1]);    render.Drawline(bottomLeft[0], bottomLeft[1], 0, topRight[0], topRight[1], 0, 0);    render.Drawline(topRight[0], bottomLeft[1], 0, bottomLeft[0], topRight[1], 0, 0);    render.Drawcircle((bottomLeft[0] + topRight[0]) / 2, (bottomLeft[1] + topRight[1]) / 2, 0, (-bottomLeft[1] + topRight[1]) / 2);}

这取决于你在打印输出时要绘制的内容，你应该遵循哪种方法。

你也可以使用VDF .Net库的Render和DrawAfter事件，如（在Form_Load中）：

VectorDraw.Professional.vdObjects.vdDocument doc = vdProControl.ActiveDocument.WrapperObject as VectorDraw.Professional.vdObjects.vdDocument;doc.OnDrawAfter += new VectorDraw.Professional.vdObjects.vdDocument.DrawAfterEventHandler(doc_OnDrawAfter);and use thevoid doc_OnDrawAfter(object sender, VectorDraw.Render.vdRender render)        {            //Do your things here        }

编写代码以在printout中绘制额外的东西。在这种情况下，你将不得不在C＃项目中添加额外的引用，如VectorDraw.Render，VectorDraw.Geometry，VectorDraw.Serialize和VectorDraw.Generics

未完待续……

标签：CAD工业4.0