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AltTextPrefix 属性（ActiveX）

2024-5-18 17:52| 发布者: admin| 查看: 124| 评论: 0|原作者: admin|来自: AutoCAD

指定除 angular 之外的所有尺寸类型的备用尺寸测量的前缀。

支持的平台：仅限 Windows

签名

VBA：

object.AltTextPrefix

对象

类型：DimAligned、DimArcLength、DimDiametric、DimOrdinate、DimRadial 、DimRadialLarge、DimRotated

此属性应用于的对象。

属性值

只读：不

类型：字符串

备用维度的前缀。

言论

此属性的初始值为“”。

若要关闭已建立的前缀，请将此属性设置为等于单个句点（.）。

注意：此属性将覆盖给定维度的 DIMAPOST 系统变量的值。

例子

VBA：

Sub Example_AltTextPrefix()
   ' This example creates an aligned dimension in model space and
   ' uses AltTextPrefix to allow the user to change the text prefix for the
   ' alternate dimension

    Dim dimObj As AcadDimAligned
    Dim point1(0 To 2) As Double, point2(0 To 2) As Double
    Dim location(0 To 2) As Double
    Dim prefix As String
    
    ' Define the dimension
    point1(0) = 0: point1(1) = 5: point1(2) = 0
    point2(0) = 5: point2(1) = 5: point2(2) = 0
    location(0) = 5: location(1) = 7: location(2) = 0
    
    ' Create an aligned dimension object in model space
    Set dimObj = ThisDrawing.ModelSpace.AddDimAligned(point1, point2, location)
    
    ' Enable alternate unit display
    dimObj.AltUnits = True
    
    ThisDrawing.Application.ZoomAll

    ' Allow the user to change the text prefix for the alternate dimension
    prefix = InputBox("Enter a new text prefix for the alternate dimension", "Alternate Dimension Prefix", "PREFIX:")
    dimObj.AltTextPrefix = prefix   ' Commit changes to prefix
    
    ThisDrawing.Regen acAllViewports
    
    ' Read back and display the alternate dimension text prefix
    prefix = dimObj.AltTextPrefix
    If prefix <> "" Then
        MsgBox "The prefix of the alternate dimension has been changed to: " & prefix
    Else
        MsgBox "The prefix of the alternate dimension has been removed"
    End If
End Sub

可视化 LISP：

(vl-load-com)
(defun c:Example_AltTextPrefix()
    ;; This example creates an aligned dimension in model space and
    ;; uses AltTextPrefix to allow the user to change the text prefix for the
    ;; alternate dimension
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    
    ;; Define the dimension
    (setq point1 (vlax-3d-point 0 5 0)
          point2 (vlax-3d-point 5 5 0)
          location (vlax-3d-point 5 7 0))
    
    ;; Create an aligned dimension object in model space
    (setq modelSpace (vla-get-ModelSpace doc))
    (setq dimObj (vla-AddDimAligned modelSpace point1 point2 location))
    
    ;; Enable alternate unit display
    (vla-put-AltUnits dimObj :vlax-true)
    
    (vla-ZoomAll acadObj)

    ;; Allow the user to change the text prefix for the alternate dimension
    (setq prefix (vla-GetString (vla-get-Utility doc) :vlax-false "\nEnter a new text prefix for the alternate dimension: "))
    (vla-put-AltTextPrefix dimObj prefix)   ;; Commit changes to prefix
    
    (vla-Regen doc acAllViewports)
    
    ;; Read back and display the alternate dimension text prefix
    (setq prefix (vla-get-AltTextPrefix dimObj))
    (if (/= prefix "")
        (alert (strcat "The prefix of the alternate dimension has been changed to: " prefix))
        (alert "The prefix of the alternate dimension has been removed")
    )
)