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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_LISTENER_HXX
#define _SVX_ACCESSIBILITY_IACCESSIBLE_VIEW_FORWARDER_LISTENER_HXX
#include <sal/types.h>
#include <tools/gen.hxx>
namespace accessibility {
class IAccessibleViewForwarder;
/** <p>The purpose of this interface is to notify a user of an
IAccessibleViewForwarder when that view forwarder changes its
properties. Such a change may be one of the following:
<ul>
<li>Change of the coordinate transformation.</li>
<li>Change of the visible area (which in turn results in a change of the
coordinate transformation.</li>
<li>Change of the validity state of the view forwarder.</li>
*/
class IAccessibleViewForwarderListener
{
public:
/** Enumeration of the different change types.
*/
enum ChangeType {TRANSFORMATION, VISIBLE_AREA, STATE};
/** This method is called to indicate a change of the specified view
forwarder.
@param aChangeType
The type of the change. TRANSFORMATION indicates a change of
the coordinate transformation with a constant visible area. If
the visible area changes, just use VISIBLE_AREA. This changes
the transformation implicitly. The value STATE indicates a
change of the validity state. Check the IsValid method of the
view forwarder before doing further calls.
@param pViewForwarder
The modified view forwarder. It is specified just in case that
there is more than one view forwarder in use at the same time.
*/
virtual void ViewForwarderChanged (ChangeType aChangeType,
const IAccessibleViewForwarder* pViewForwarder) = 0;
protected:
~IAccessibleViewForwarderListener() {}
};
} // end of namespace accessibility
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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