Boundary的妙用（以设置文字的宽度为例）

萧闫子

不知大家注意到没有，在Revit视图中的文字的宽度在不同的视图比例下，同一个文字兑现给的TextNote.Width 属性值是变换的。这就给大家造成一个麻烦，那就是如何在不同的比例下，创建文字，且是文字编辑器的宽度刚好容纳下文字的宽度呢？

文字是编程中大量使用的功能，所以这个应该对大家的工作有启发意义。

Revit API提供了Element..Boundary（view）属性 用于获取在指定视图下的外包box，我们可以利用这个属性来获取文字的实际宽度，然后把这个值赋给TextNote.Width属性，达到文字的编辑器宽度正好容纳下所有文字。这样当客户双击文字进行编辑时，文字不会换行。

请看下面的实现代码。

1. <div align="left">
   
2. <ul type="1" class="litype_1" style="margin-left: 14px; "><li style="list-style-position: initial; list-style-image: initial; ">Transaction transaction = new Transaction(activeDoc, "create text note"); //created by Joe Ye
   
3. </li><li style="list-style-position: initial; list-style-image: initial; ">            transaction.Start();  </li><li style="list-style-position: initial; list-style-image: initial; ">
   
4. </li><li style="list-style-position: initial; list-style-image: initial; ">            string str = "ABCDabcd1234";  </li><li style="list-style-position: initial; list-style-image: initial; ">            TextNote tn = activeDoc.Create.NewTextNote(activeDoc.ActiveView, new XYZ(0, 0, 0), new XYZ(1, 0, 0), new XYZ(0, 1, 0),0.001, TextAlignFlags.TEF_ALIGN_LEFT, str);  </li><li style="list-style-position: initial; list-style-image: initial; ">
   
5. </li><li style="list-style-position: initial; list-style-image: initial; ">
   
6. </li><li style="list-style-position: initial; list-style-image: initial; ">            BoundingBoxXYZ bounding = tn.get_BoundingBox(activeDoc.ActiveView);  </li><li style="list-style-position: initial; list-style-image: initial; ">            tn.Width = (bounding.Max.X - bounding.Min.X) * (1.0 + 1.0 / str.Length); //增加一个文字的宽度，防止编辑时变成两行
   
7. </li><li style="list-style-position: initial; list-style-image: initial; ">
   
8. </li><li style="list-style-position: initial; list-style-image: initial; ">            //show the bounding in the view to see the calculated boundary of the text.,you can remove it.
   
9. </li><li style="list-style-position: initial; list-style-image: initial; ">            Line line1 = activeDoc.Application.Create.NewLineBound(bounding.Min, new XYZ(bounding.Max.X,bounding.Min.Y,0));  </li><li style="list-style-position: initial; list-style-image: initial; ">            Line line2 = activeDoc.Application.Create.NewLineBound(new XYZ(bounding.Max.X, bounding.Min.Y, 0), bounding.Max);  </li><li style="list-style-position: initial; list-style-image: initial; ">            Line line3 = activeDoc.Application.Create.NewLineBound(bounding.Max,new XYZ(bounding.Min.X, bounding.Max.Y, 0) );  </li><li style="list-style-position: initial; list-style-image: initial; ">            Line line4 = activeDoc.Application.Create.NewLineBound(new XYZ(bounding.Min.X, bounding.Max.Y, 0), bounding.Min);  </li><li style="list-style-position: initial; list-style-image: initial; ">
   
10. </li><li style="list-style-position: initial; list-style-image: initial; ">            activeDoc.Create.NewModelCurve(line1, activeDoc.ActiveView.SketchPlane);  </li><li style="list-style-position: initial; list-style-image: initial; ">            activeDoc.Create.NewModelCurve(line2, activeDoc.ActiveView.SketchPlane);  </li><li style="list-style-position: initial; list-style-image: initial; ">            activeDoc.Create.NewModelCurve(line3, activeDoc.ActiveView.SketchPlane);  </li><li style="list-style-position: initial; list-style-image: initial; ">            activeDoc.Create.NewModelCurve(line4, activeDoc.ActiveView.SketchPlane);  </li><li style="list-style-position: initial; list-style-image: initial; ">
    
11. </li><li style="list-style-position: initial; list-style-image: initial; ">            transaction.Commit();  
    
12. </li></ul></div>

复制代码

使用这个方法，你可以获得Revit中任何一个对象的外包box

看看侃侃

路过！！！ 帮顶……