# wxArchiveNotifier Class Reference
[Archive support, Streams]

`#include <wx/archive.h>`

## Detailed Description

If you need to know when a wxArchiveInputStream updates a wxArchiveEntry object, you can create a notifier by deriving from this abstract base class, overriding wxArchiveNotifier::OnEntryUpdated.

An instance of your notifier class can then be assigned to the wxArchiveEntry object using wxArchiveEntry::SetNotifier. Your OnEntryUpdated() method will then be invoked whenever the input stream updates the entry.

Setting a notifier is not usually necessary. It is used to handle certain cases when modifying an archive in a pipeline (i.e. between non-seekable streams). See Archives on Non-Seekable Streams.

##

Library: wxBase

Category: Archive support, Streams

See also:
  Archives on Non-Seekable Streams, wxArchiveEntry, wxArchiveInputStream, wxArchiveOutputStream

## Public Member Functions
virtual void | OnEntryUpdated (wxArchiveEntry &entry)=0
| This method must be overridden in your derived class.

List of all members.

## Member Function Documentation

virtual void wxArchiveNotifier::OnEntryUpdated | ( | wxArchiveEntry & | entry | ) | `[pure virtual]`

This method must be overridden in your derived class.

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