在Inventor中做交互操作时，是否能同时设置kDrawingNoteFilter和kDrawingDimensionFilter两个过滤条件呢？也就是说是否可以让用户选择这两种标注样式呢？
答案是肯定的。除了两个特别的过滤条件(kSketchProfileFilter和kSketch3DProfileFilter)，别的类型的过滤条件累加是没有问题的(通过重复调用AddSelectionFilter)。Inventor的开发帮组文档对AddSelectionFilter的参数的解释中暗示了可以增加多个过滤条件：
Parameters
Description
Filter
Input value to be added to the list that specifies the filter or the indication of the type of object(s) being looked for. The valid filters for sketch profile selection are kSketchProfileFilter, kSketch3DProfileFilter or both. If either of these filters is added, no other filters can be added (method returns an error). If any filter other than these two are already added, adding these filters return an error.
下面是我写的VBA测试代码，可以返回用户选取的标注文字和标注尺寸：
Module1:
Sub twoFilters()
‘ Create a new clsSelect object.
Dim oSelect As New clsSelect
Dim objs As ObjectCollection
Set objs = ThisApplication.TransientObjects.CreateObjectCollection
oSelect.Pick objs
Set oSelect = Nothing
If objs.Count > 0 Then
‘Do something here…
End If
objs.Clear
Set objs = Nothing
End Sub
Class clsSelect:
‘*************************************************************
‘ The declarations and functions below need to be copied into
‘ a class module whose name is “clsSelect”. The name can be
‘ changed but you’ll need to change the declaration in the
‘ calling function “testSelection” to use the new name.
‘ Declare the event objects
Private WithEvents oInteractEvents As InteractionEvents
Private WithEvents oSelectEvents As SelectEvents
Private oSelectedEnts As ObjectCollection
‘ Declare a flag that’s used to determine when selection stops.
Private bStillSelecting As Boolean
Public Sub Pick(ByRef objCol As ObjectCollection)
‘ Initialize flag.
bStillSelecting = True
‘ Create an InteractionEvents object.
Set oInteractEvents = ThisApplication.CommandManager.CreateInteractionEvents
‘ Ensure interaction is enabled.
oInteractEvents.InteractionDisabled = False
‘ Set a reference to the select events.
Set oSelectEvents = oInteractEvents.SelectEvents
‘ Set the filter using the value passed in.
oSelectEvents.SingleSelectEnabled = False
oSelectEvents.AddSelectionFilter kDrawingNoteFilter
oSelectEvents.AddSelectionFilter kDrawingDimensionFilter
oInteractEvents.StatusBarText = “Select note and dimention, ESC to quit.”
Set oSelectedEnts = ThisApplication.TransientObjects.CreateObjectCollection
‘ Start the InteractionEvents object.
oInteractEvents.Start
‘ Loop until a selection is made.
Do While bStillSelecting
DoEvents
Loop
‘ Get the selected items.
objCol.Clear
If oSelectedEnts.Count > 0 Then
Dim obj As Object
For Each obj In oSelectedEnts
objCol.Add obj
Next
End If
‘ Stop the InteractionEvents object.
oInteractEvents.Stop
‘ Clean up.
Set oSelectEvents = Nothing
Set oInteractEvents = Nothing
End Sub
Private Sub oInteractEvents_OnTerminate()
‘ Set the flag to indicate we’re done.
bStillSelecting = False
End Sub
Private Sub oSelectEvents_OnSelect(ByVal JustSelectedEntities As ObjectsEnumerator, ByVal SelectionDevice As SelectionDeviceEnum, ByVal ModelPosition As Point, ByVal ViewPosition As Point2d, ByVal View As View)
Dim obj As Object
For Each obj In JustSelectedEntities
oSelectedEnts.Add obj
Next
End Sub
Private Sub oSelectEvents_OnUnSelect(ByVal UnSelectedEntities As ObjectsEnumerator, ByVal SelectionDevice As SelectionDeviceEnum, ByVal ModelPosition As Point, ByVal ViewPosition As Point2d, ByVal View As View)
Dim obj As Object
For Each obj In UnSelectedEntities
oSelectedEnts.RemoveByObject obj
Next
End Sub
经历一种身体下了地狱，眼睛进入天堂，灵魂归入故里。
