60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_VIEWUPDATE_HXX
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#define INCLUDED_SLIDESHOW_SOURCE_INC_VIEWUPDATE_HXX
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#include "disposable.hxx"
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#include <memory>
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/* Definition of ViewUpdate interface */
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namespace slideshow::internal
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{
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/** Interface for something that can perform view updates.
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Use this interface for objects that perform view updates
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from time to time, e.g. slide content. Availability of
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updates can be queried, and subsequently performed.
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*/
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class ViewUpdate : public Disposable
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{
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public:
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/** Perform the update action on all views
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@return true, if the update was performed
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successfully, false otherwise.
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*/
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virtual bool update() = 0;
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/** Query whether updates are pending
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@return true, if updates are pending. Calling update()
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subsequently will perform the pending update then.
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*/
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virtual bool needsUpdate() const = 0;
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};
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typedef ::std::shared_ptr< ViewUpdate > ViewUpdateSharedPtr;
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}
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#endif // INCLUDED_SLIDESHOW_SOURCE_INC_VIEWUPDATE_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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