slideshow/source/engine/wakeupevent.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <algorithm>
  23
  24 #include <wakeupevent.hxx>
  25
  26
  27 namespace slideshow
  28 {
  29     namespace internal
  30     {
  31         WakeupEvent::WakeupEvent(
  32             std::shared_ptr<canvas::tools::ElapsedTime> const & pTimeBase,
  33             ActivitiesQueue& rActivityQueue ) :
  34             Event("WakeupEvent"),
  35             maTimer(pTimeBase),
  36             mnNextTime(0.0),
  37             mpActivity(),
  38             mrActivityQueue( rActivityQueue )
  39         {
  40         }
  41
  42         void WakeupEvent::dispose()
  43         {
  44             mpActivity.reset();
  45         }
  46
  47         bool WakeupEvent::fire()
  48         {
  49             if( !mpActivity )
  50                 return false;
  51
  52             return mrActivityQueue.addActivity( mpActivity );
  53         }
  54
  55         bool WakeupEvent::isCharged() const
  56         {
  57             // this event won't expire, we fire every time we're
  58             // re-inserted into the event queue.
  59             return true;
  60         }
  61
  62         double WakeupEvent::getActivationTime( double nCurrentTime ) const
  63         {
  64             const double nElapsedTime( maTimer.getElapsedTime() );
  65
  66             return ::std::max( nCurrentTime,
  67                                nCurrentTime - nElapsedTime + mnNextTime );
  68         }
  69
  70         void WakeupEvent::start()
  71         {
  72             // start timer
  73             maTimer.reset();
  74         }
  75
  76         void WakeupEvent::setNextTimeout( double rNextTime )
  77         {
  78             mnNextTime = rNextTime;
  79         }
  80
  81         void WakeupEvent::setActivity( const ActivitySharedPtr& rActivity )
  82         {
  83             mpActivity = rActivity;
  84         }
  85     }
  86 }
  87
  88 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */