There
are many types of AutoCAD reactors. Each reactor type responds
to one or more AutoCAD events. The different types of reactors
are grouped into the following categories:
- Database Reactors
-
Database reactors notify your application when specific
events occur to the drawing database, such as when an object has
been added to the database.
- Document Reactors
-
Document reactors notify your application of
a change to the current drawing document, such as opening a new
drawing document, activating a different document window, and changing
a document's lock status.
- Editor Reactors
-
Editor reactors notify you each time an AutoCAD command
is invoked; a drawing opens, closes, or is saved; a DXF file is
imported or exported; or a system variable changes value.
- Linker Reactors
-
Linker reactors notify your application every time
an ObjectARX application is loaded or unloaded.
- Object Reactors
-
Object reactors notify you each time a specific object
is changed, copied, or deleted.
With the exception of Editor reactors, there
is one type of reactor for each reactor category. The following
table lists the name by which each reactor type is identified in
AutoLISP code:
General
reactor types
|
Reactor
type identifier
|
Description
|
:VLR-AcDb-Reactor
|
Database
reactor
|
:VLR-DocManager-Reactor
|
Document
management reactor
|
:VLR-Editor-Reactor
|
General
Editor reactor—maintained for backward-compatibility
|
:VLR-Linker-Reactor
|
Linker
reactor
|
:VLR-Object-Reactor
|
Object
reactor
|
Beginning with AutoCAD 2000, the broad class of
Editor reactors is broken down into more specific reactor types.
The :VLR-Editor-Reactor type is retained for backward-compatibility,
but any new Editor reactors introduced with AutoCAD 2000 cannot be
referenced through :VLR-Editor-Reactor. The following table lists
the types of Editor reactors available beginning with AutoCAD 2000.
Editor reactor types
|
Reactor
type
|
Description
|
:VLR-Command-Reactor
|
Provides
notification of a command event
|
:VLR-DeepClone-Reactor
|
Provides
notification of a deep clone event
|
:VLR-DWG-Reactor
|
Provides
notification of a drawing event (for example, opening or closing
a drawing file)
|
:VLR-DXF-Reactor
|
Provides
notification of an event related to reading or writing of a DXF
file
|
:VLR-Insert-Reactor
|
Provides
notification of an event related to block insertion
|
:VLR-Lisp-Reactor
|
Provides
notification of an AutoLISP event
|
:VLR-Miscellaneous-Reactor
|
Does not
fall under any of the other editor reactor types
|
:VLR-Mouse-Reactor
|
Provides
notification of a mouse event (for example, a double-click)
|
:VLR-SysVar-Reactor
|
Provides
notification of a change to a system variable
|
:VLR-Toolbar-Reactor
|
Provides
notification of a change to the bitmaps in a toolbar
|
:VLR-Undo-Reactor
|
Provides
notification of an undo event
|
:VLR-Wblock-Reactor
|
Provides
notification of an event related to writing a block
|
:VLR-Window-Reactor
|
Provides
notification of an event related to moving or sizing an AutoCAD window
|
:VLR-XREF-Reactor
|
Provides
notification of an event related to attaching or modifying xrefs
|
Use
the vlr-types function to
return the complete list of reactor types.
