新手入门必看：VectorDraw 常见问题整理大全（十三）

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. 在用户激活视口时更改视口的颜色

问：当用户通过双击激活视口时，如何更改视口的颜色/p>

答：在“Collections”示例中添加ActionLayoutActivated事件并编写类似的代码：

VectorDraw.Professional.vdObjects.vdColor oldcolor = new VectorDraw.Professional.vdObjects.vdColor(); // there will store the color before the "highlight"VectorDraw.Professional.vdObjects.vdHandle deactivated_Viewport_handle = new VectorDraw.Professional.vdObjects.vdHandle(); // The handle of the Viewport we changedvoid ActiveDocument_ActionLayoutActivated(object sender, VectorDraw.Professional.vdPrimaries.vdLayout deactivated, VectorDraw.Professional.vdPrimaries.vdLayout activated){// fires when the Layout or the Viewport changesif (activated.ActiveViewPort == null) // Run when MODEL is activated that happens when the viewport is activated or user returns to Model.{    if (deactivated.ActiveViewPort != null) // the deactiveted vieport is the one that the use dbl-clicked    {        oldcolor.CopyFrom(deactivated.ActiveViewPort.PenColor); // store the color        deactivated.ActiveViewPort.PenColor.SystemColor = Color.Red; // change the color        deactivated.ActiveViewPort.Update();        deactivated.ActiveViewPort.Invalidate();        deactivated_Viewport_handle = deactivated.ActiveViewPort.Handle; // store the handle    }    if ((deactivated.ActiveViewPort == null) && (deactivated_Viewport_handle.Value != 0)) // This happens when the Viewport is not "active"    {//create a vdViewport and set it to the viewport that was deactivated        VectorDraw.Professional.vdFigures.vdViewport deactiViewport = new VectorDraw.Professional.vdFigures.vdViewport();        deactiViewport= vdFramedControl1.BaseControl.ActiveDocument.FindFromHandle(deactivated_Viewport_handle, typeof(VectorDraw.Professional.vdPrimaries.vdFigure)) as VectorDraw.Professional.vdFigures.vdViewport;        deactiViewport.PenColor.CopyFrom(oldcolor); // change the color back        if (deactiViewport.ClipObj != null)        {            deactiViewport.ClipObj.PenColor.CopyFrom(oldcolor); // to the ClipObj too            deactiViewport.ClipObj.Update();            deactiViewport.ClipObj.Invalidate();        }        deactiViewport.Update();        deactiViewport.Invalidate();        deactivated_Viewport_handle= new VectorDraw.Professional.vdObjects.vdHandle(0); // set the handle to 0    }}}

二. 在包装器中使用AlignToView和AlignToViewSize

问：如何在包装器中使用AlignToView和AlignToViewSize/p>

Private Sub Command6_Click()Dim txt As VDrawI5.vdTextDim AlignObject As VectorDraw_Professional.IAlignToView    Set txt = VD.ActiveDocument.entities.AddText("aaBB", Array(10, 10), 1)    VD.CommandAction.CmdRect Array(9.5, 9.5), Array(14, 11.5)    VD.CommandAction.Zoom "E", 0, 0     Set AlignObject = txt.WrapperObject ' set this text to be always parallel to the view.    AlignObject.AlignToView = True    AlignObject.AlignToViewSize = 20 'text size always the same, size in pixelsEnd SubPrivate Sub Command7_Click()    VD.CommandAction.View3D "VROT"End Sub

三. 在移动鼠标的同时在光标周围画一个圆圈

问：我想在移动鼠标时围绕光标画一个圆圈。我没有任何主动操作，我尝试使用MouseMove事件，但结果不正确。我该怎么做呢 /p>

答：你应该使用在没有任何活动操作的情况下触发的OnActionDraw事件。试试如下代码：

void ActiveDocument_OnActionDraw(object sender, object action, bool isHideMode, ref bool cancel){    VectorDraw.Actions.BaseAction act = action as VectorDraw.Actions.BaseAction;    VectorDraw.Geometry.gPoint currentpoint = act.OrthoPoint;    VectorDraw.Professional.vdFigures.vdCircle circle = new VectorDraw.Professional.vdFigures.vdCircle();    circle.SetUnRegisterDocument(vdSC.BaseControl.ActiveDocument);    circle.setDocumentDefaults();    circle.Center = currentpoint;    circle.Radius =2.0;    circle.Draw(act.Render);}

四. 像cmdCircle那样创建自己的命令

问：我想像cmdCircle那样创建自己的命令，但没有cmdCircle显示的rubber radious。我该怎么做 /p>

答：你需要创建自己的cmd-circle而不是使用我们的cmdCircle。例如，在表单中的空C＃项目中添加一个vdScrollable控件（名为vdSC）和一个按钮并使用如下代码：

      bool onMycmdCircle = false;        VectorDraw.Geometry.gPoint cent = new VectorDraw.Geometry.gPoint();        private void Form1_Load(object sender, EventArgs e)        {            this.vdSC.BaseControl.ActiveDocument.ShowUCSAxis = false;            this.vdSC.BaseControl.ActiveDocument.FreezeEntityDrawEvents.Push(false);            this.vdSC.BaseControl.ActiveDocument.OnActionDraw += new VectorDraw.Professional.vdObjects.vdDocument.ActionDrawEventHandler(ActiveDocument_OnActionDraw);        }        void ActiveDocument_OnActionDraw(object sender, object action, bool isHideMode, ref bool cancel)        { //here we draw the rubber circle            if (action is VectorDraw.Actions.ActionGetPoint && onMycmdCircle)            {                VectorDraw.Actions.BaseAction act = action as VectorDraw.Actions.BaseAction;                VectorDraw.Geometry.gPoint refpoint = act.ReferencePoint;                VectorDraw.Geometry.gPoint currentpoint = act.OrthoPoint;                VectorDraw.Professional.vdFigures.vdCircle circle = new VectorDraw.Professional.vdFigures.vdCircle();                circle.SetUnRegisterDocument(vdSC.BaseControl.ActiveDocument);                circle.setDocumentDefaults();                circle.Center = cent;                circle.Radius = circle.Center.Distance3D(currentpoint);                circle.Draw(act.Render);            }            else            {                return;            }            return;        }        private void button2_Click(object sender, EventArgs e)        {            VectorDraw.Geometry.gPoint pt_cent = new VectorDraw.Geometry.gPoint();            VectorDraw.Geometry.gPoint pt_ref = new VectorDraw.Geometry.gPoint();            object status_cen = vdSC.BaseControl.ActiveDocument.ActionUtility.getUserPoint(out pt_cent);            vdSC.BaseControl.ActiveDocument.ActiveLayOut.User2WorldMatrix.TransformPt(pt_cent, cent);            if (status_cen != null && (VectorDraw.Actions.StatusCode)status_cen == VectorDraw.Actions.StatusCode.Success)            {                onMycmdCircle = true;                object status_ref = vdSC.BaseControl.ActiveDocument.ActionUtility.getUserPoint(out pt_ref);                onMycmdCircle = false;                 if (status_ref != null && (VectorDraw.Actions.StatusCode)status_ref == VectorDraw.Actions.StatusCode.Success)                {                    //VectorDraw.Geometry.gPoint cent = new VectorDraw.Geometry.gPoint();                    double radious = 0;                    VectorDraw.Geometry.gPoint refp = new VectorDraw.Geometry.gPoint();                    vdSC.BaseControl.ActiveDocument.ActiveLayOut.User2WorldMatrix.TransformPt(pt_ref, refp);                    radious = refp.Distance3D(cent);                    vdSC.BaseControl.ActiveDocument.CommandAction.CmdCircle(cent, radious);                }            }        }

未完待续~

标签：CAD工业4.0