IlvActionMessage Class Reference

Notification message sent to observers of IlvActionHistory objects. More...

#include <ilviews/base/action.h>

List of all members.

Public Attributes
IlvAction *	_action
IlvActionMessageType	_message

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Detailed Description

Notification message sent to observers of IlvActionHistory objects.

Library: views

Each time a significant change in an IlvActionHistory object is performed, the action history can notify IlvObserver objects of these changes. This allows you, for example, to keep track of whether commands can be undone or redone, whether commands have generated an error when executed, or whether the document to which the action history is attached has to be saved.

When an IlvActionHistory object calls its notify method, it passes a pointer to an IlvActionMessage object created statically. This object consists of an IlvActionMessageType and a pointer to the IlvAction object to which the message applies.

See also:

IlvObserver, IlvActionHistory, IlvCommand, IlvCommandHistory.

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Member Data Documentation

IlvAction* IlvActionMessage::_action

The action to which the message applies.

IlvActionMessageType IlvActionMessage::_message

Message sent to the observers.