vlr-object-reactor (AutoLISP/ActiveX)

Type: List

An AutoLISP list of VLA-objects identifying the drawing objects to be watched.

Type: Integer, Real, String, List, VLA-object, Safearray, Variant, T, or nil

Any AutoLISP data to be associated with the reactor object; otherwise nil if no data.

Type: List

A list of pairs of the following form:

(event-name . callback_function)

• event-name is one of the following Object Events:

  Object events
  Name	Event
  :vlr-cancelled	The modification of the object has been canceled.
  :vlr-copied	The object has been copied.
  :vlr-erased	Erase-flag of the object has been set.
  :vlr-unerased	Erase-flag of the object has been reset.
  :vlr-goodbye	The object is about to be deleted from memory.
  :vlr-openedForModify	The object is about to be modified.
  :vlr-modified	The object has been modified. If the modification was canceled, also :vlr-cancelled and :vlr-modifyUndone will be fired.
  :vlr-subObjModified	A sub-entity of the object has been modified. This event is triggered for modifications to vertices of polylines or meshes, and for attributes owned by block references.
  :vlr-modifyUndone	The object's modification was undone.
  :vlr-modifiedXData	The object's extended entity data has been modified.
  :vlr-unappended	The object has been detached from the drawing database.
  :vlr-reappended	The object has been re-attached to the drawing database.
  :vlr-objectClosed	The object's modification has been finished.

• callback_function is a symbol representing a function to be called when the event fires. Each callback function accepts three arguments:

  owner -- The owner of the VLA-object the event applies to.

  reactor_object -- The VLR object that called the callback function.

  list -- A list of extra data elements associated with the particular event. The contents of this list for particular events are shown in the “Object Events Callback Data” table.

  Object events callback data
  Name	List length	Parameters
  :vlr-cancelled :vlr-erased, :vlr-unerased :vlr-goodbye :vlr-openedForModify :vlr-modified :vlr-modifyUndone :vlr-modifiedXData :vlr-unappended :vlr-reappended :vlr-objectClosed	0
  :vlr-copied	1	The object created by the copy operation (ename).
  :vlr-subObjModified	1	The sub-object (ename) that has been modified