新手入门必看：VectorDraw 常见问题整理大全（十九）

本系列教程整理了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. 通过单击一个来选择多个连续实体的方法

问：请问可以通过单击一个来选择多个连续实体的方法是什么/p>

答：由于图中的实体没有完全相互持续，并且其中一些实体存在一个小的“间隙”，因此你需要使用如下所示代码：

                vdFigure fig;                gPoint pt;                doc.Prompt("select a curve");                doc.ActionUtility.getUserEntity(out fig,out pt);                doc.Prompt(null);                vdCurve curve = fig as vdCurve;                if(curve == null) return;                        gPoint sp = curve.getStartPoint();                gPoint ep = curve.getEndPoint();                               vdSelection set = new vdSelection();                set.SetUnRegisterDocument(doc);                set.AddItem(curve, true, vdSelection.AddItemCheck.RemoveInVisibleEntities);                double equality = 0.01;                int pos = 0;                while (pos < set.Count && sp != null && ep != null)                {                    gPoints pts = new gPoints();                    pts.Add((sp - new gPoint(equality, equality)));                    pts.Add((sp + new gPoint(equality, equality)));                    set.Select(RenderSelect.SelectingMode.CrossingWindowRectangle, pts);                    pts = new gPoints();                    pts.Add((ep - new gPoint(equality, equality)));                    pts.Add((ep + new gPoint(equality, equality)));                    set.Select(RenderSelect.SelectingMode.CrossingWindowRectangle, pts);                    pos++;                    sp = null;                    ep = null;                    for (int i = pos; i < set.Count; i++)                    {                                        curve = set[i] as vdCurve;                        if (curve != null)                        {                            sp = curve.getStartPoint();                            ep = curve.getEndPoint();                            break;                        }                        pos++;                    }                }                doc.UndoHistory.StoreUndoGroup(true);                foreach (vdFigure ent in set)                {                    ent.PenColor = new vdColor(Color.Blue);                    ent.LineWeight = VectorDraw.Professional.Constants.VdConstLineWeight.LW_120;                }                doc.UndoHistory.StoreUndoGroup(false);                set.Invalidate();

二. 使命令的行文本框接受空格键为enter

问：当我按下回车键并按空格键时，我想使命令行的行为相同。

答：你需要使用Command的行userText框事件KeyDown，并在按下空格时向其发送一条输入消息，如下代码所示：

void UserText_KeyDown(object sender, KeyEventArgs e){if (e.KeyCode == Keys.Space){VectorDraw.WinMessages.MessageManager.MSG m = new VectorDraw.WinMessages.MessageManager.MSG();m.hwnd = vdFramedControl1.CommandLine.UserText.Handle;m.lParam = IntPtr.Zero;m.message = (int)VectorDraw.WinMessages.MessageManager.Messages.WM_KEYDOWN;m.wParam = (IntPtr)Keys.Enter;VectorDraw.WinMessages.MessageManager.TranslateMessage(ref m);VectorDraw.WinMessages.MessageManager.DispatchMessage(ref m);}}private void Form1_Load(object sender, EventArgs e){vdFramedControl1.CommandLine.UserText.KeyDown += new KeyEventHandler(UserText_KeyDown);}

三. 在cmdText启动之前设置文本的高度

问：文档的全局/默认文本高度是否存在想要这个，因为当我想从用户输入高度值时，它在用户创建此vdtext时不会影响当前的vdtext。当用户按照你在先前邮件中的建议完成命令时，高度会生效。但我希望用户在撰写文本时可以看到新的高度。

答：你可以在cmdText启动之前设置文本的高度。请参阅下面的代码和备注：

        private void button3_Click(object sender, EventArgs e)        {            vdDocument doc = vdFramedControl1.BaseControl.ActiveDocument;            doc.New();            cmdTextWithHeight(doc, null, null, null, 5.0);            cmdTextWithHeight(doc, "VDF version6", new gPoint(30,30), null, 15.0);            cmdTextWithHeight(doc, null, new gPoint(10,10), 0.0d, 25.0);            cmdTextWithHeight(doc, "hi", null, 30.0, 35.0);        }        private bool cmdTextWithHeight(vdDocument document, object TextString, object InsertionPoint, object RotationAngle, double TextHeight)        {            bool ret = false;            double oldheight = document.ActiveTextStyle.Height; // store the old value to set this back after this finishes            document.ActiveTextStyle.Height = TextHeight;// set the Height that is needed to activetextstyle            if (document.CommandAction.CmdText(TextString, InsertionPoint, RotationAngle))            {                vdText txt = document.ActiveLayOut.Entities[document.ActiveLayOut.Entities.Count - 1] as vdText; // get the text that was just created                if (txt != null)                {                    //... do other things there with the just-created-vdText if you like !!                    txt.Height = TextHeight; // see it to the Height so evene if activeTextStyle changes this remains.                    ret = true;                }            }            document.ActiveTextStyle.Height = oldheight; // set the original value back.            return ret;        }

未完待续~

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标签：CAD3D矢量图形3d图