vlr-docmanager-reactor (AutoLISP/ActiveX)

Constructs a reactor object that notifies of events relating to drawing documents

Supported Platforms: Windows only

Signature

(vlr-docmanager-reactor data callbacks)
data

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.

callbacks

Type: List

A list of pairs of the following form:

(event-name . callback_function)

  • event-name is one of the following DocManager reactor events:

    DocManager reactor events

    Event name

    Description

    :vlr-documentCreated

    A new document was created for a drawing (new or open).

    Useful for updating your per-document structures.

    :vlr-documentToBeDestroyed

    A document will be destroyed.

    :vlr-documentLockModeWillChange

    A command is about to start or finish modifying elements in the document, and is obtaining or releasing a lock on the document.

    :vlr-documentLockModeChangeVetoed

    A reactor invoked veto on itself from a :vlr-documentLockModeChanged callback.

    :vlr-documentLockModeChanged

    The lock on the document has been obtained or released.

    :vlr-documentBecameCurrent

    The current document has been changed.

    This does not necessarily imply that the document has been activated, because changing the current document is necessary for some operations. To obtain user input, the document must be activated as well.

    :vlr-documentToBeActivated

    A currently inactive document has just received the activate signal, implying that it is about to become the current document.

    :vlr-documentToBeDeactivated

    Another window (inside or outside of AutoCAD) has been activated.

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

    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 “DocManager reactor callback data” table.

    DocManager reactor callback data

    Name

    List length

    Parameters

    :vlr-documentCreated

    :vlr-documentToBeDestroyed

    :vlr-documentBecameCurrent

    :vlr-documentToBeActivated

    :vlr-documentToBeDeactivated

    1

    The affected document object (VLA-object).

    :vlr-documentLockModeChangeVetoed

    2

    First parameter is the affected document object (VLA-object).

    Second parameter is the global command string passed in for the lock request. If the callback is being made on behalf of an unlock request, the string will be prefixed with “#”.

    :vlr-documentLockModeWillChange

    :vlr-documentLockModeChanged

    5

    First parameter is the affected document object (VLA-object).

    Second parameter is an integer indicating the lock currently in effect for the document object.

    Third parameter is an integer indicating the lock mode that will be in effect after the lock is applied.

    Fourth parameter is the strongest lock mode from all other execution contexts.

    Fifth parameter is the global command string passed in for the lock request. If the callback is being made on behalf of an unlock request, the string will be prefixed with “#”.

    Lock modes may be any of the following:

    1—Auto Write Lock

    2—Not Locked

    4—Shared Write

    8—Read

    10—Exclusive Write

Return Values

Type: VLR object

The reactor_object argument from the callback_function.

Examples

N/A

Related Concepts