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| -rw-r--r-- | slideshow/source/inc/activitiesqueue.hxx | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/slideshow/source/inc/activitiesqueue.hxx b/slideshow/source/inc/activitiesqueue.hxx new file mode 100644 index 000000000..9fd3df83a --- /dev/null +++ b/slideshow/source/inc/activitiesqueue.hxx @@ -0,0 +1,121 @@ +/* -*- 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 INCLUDED_SLIDESHOW_SOURCE_INC_ACTIVITIESQUEUE_HXX +#define INCLUDED_SLIDESHOW_SOURCE_INC_ACTIVITIESQUEUE_HXX + +#include <deque> + +#include "activity.hxx" + +#include <canvas/elapsedtime.hxx> + +#include <memory> + + +/* Definition of ActivitiesQueue class */ + +namespace slideshow::internal + { + /** This class handles the XSprite updates needed for + animations, such as moves, scales etc. You can add + activity objects to this class, which are called in a + round-robin fashion. + */ + class ActivitiesQueue + { + public: + /** Create an ActivitiesQueue. + + @param pPresTimer + Pointer to global presentation timer. Used for + adjusting and holding global presentation time. + */ + explicit ActivitiesQueue( + const std::shared_ptr< ::canvas::tools::ElapsedTime >& pPresTimer ); + ~ActivitiesQueue(); + ActivitiesQueue(const ActivitiesQueue&) = delete; + ActivitiesQueue& operator=(const ActivitiesQueue&) = delete; + + /** Add the given activity to the queue. + */ + bool addActivity( const ActivitySharedPtr& pActivity ); + + /** Add the given activity prioritized last in the queue. + */ + bool addTailActivity( const ActivitySharedPtr& pActivity ); + + /** Process the activities queue. + + This method performs the smallest atomic processing + possible on the queue (typically, this means one + activity get processed). + */ + void process(); + + /** Call all dequeued activities' dequeued() method + */ + void processDequeued(); + + /** Query state of the queue + + @return false, if queue is empty, true otherwise + */ + bool isEmpty() const; + + /** Remove all pending activities from the queue. + */ + void clear(); + + /** Gets the queue's timer object. + */ + std::shared_ptr< ::canvas::tools::ElapsedTime > const & + getTimer() const { return mpTimer; } + + private: + std::shared_ptr< ::canvas::tools::ElapsedTime > mpTimer; + + typedef ::std::deque< ActivitySharedPtr > ActivityQueue; + + ActivityQueue maCurrentActivitiesWaiting; // currently running + // activities, that still + // await processing for this + // round + + ActivityQueue maCurrentTailActivitiesWaiting; // activities that will be + // processed last in the queue + + ActivityQueue maCurrentActivitiesReinsert; // currently running + // activities, that are + // already processed for + // this round, and wants + // to be reinserted next + // round + + ActivityQueue maDequeuedActivities; // This list collects all activities which did not request + // a reinsertion. After the screen update has been + // performed, those are notified via dequeued(). This + // facilitates cleanup actions taking place _after_ the + // current frame has been displayed. + }; + +} +#endif // INCLUDED_SLIDESHOW_SOURCE_INC_ACTIVITIESQUEUE_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |