Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       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
      13             :  *   with this work for additional information regarding copyright
      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             : #ifndef INCLUDED_SLIDESHOW_WAKEUPEVENT_HXX
      20             : #define INCLUDED_SLIDESHOW_WAKEUPEVENT_HXX
      21             : 
      22             : #include <canvas/elapsedtime.hxx>
      23             : 
      24             : #include "event.hxx"
      25             : #include "activitiesqueue.hxx"
      26             : 
      27             : #include <boost/bind.hpp>
      28             : #include <boost/noncopyable.hpp>
      29             : 
      30             : namespace slideshow {
      31             : namespace internal {
      32             : 
      33             : /** Little helper class, used to set Activities active again
      34             :     after some sleep period.
      35             : 
      36             :     Clients can use this class to schedule wakeup events at
      37             :     the EventQueue, to avoid busy-waiting for the next
      38             :     discrete time instant.
      39             : */
      40           0 : class WakeupEvent : public Event,
      41             :                     private ::boost::noncopyable
      42             : {
      43             : public:
      44             :     WakeupEvent(
      45             :         ::boost::shared_ptr< ::canvas::tools::ElapsedTime > const& pTimeBase,
      46             :         ActivitiesQueue & rActivityQueue );
      47             : 
      48             :     virtual void dispose() SAL_OVERRIDE;
      49             :     virtual bool fire() SAL_OVERRIDE;
      50             :     virtual bool isCharged() const SAL_OVERRIDE;
      51             :     virtual double getActivationTime( double nCurrentTime ) const SAL_OVERRIDE;
      52             : 
      53             :     /// Start the internal timer
      54             :     void start();
      55             : 
      56             :     /** Set the next timeout this object should generate.
      57             : 
      58             :         @param nextTime
      59             :         Absolute time, measured from the last start() call,
      60             :         when this event should wakeup the Activity again. If
      61             :         your time is relative, simply call start() just before
      62             :         every setNextTimeout() call.
      63             :     */
      64             :     void setNextTimeout( double nextTime );
      65             : 
      66             :     /** Set activity to wakeup.
      67             : 
      68             :         The activity given here will be reinserted into the
      69             :         ActivitiesQueue, once the timeout is reached.
      70             :     */
      71             :     void setActivity( const ActivitySharedPtr& rActivity );
      72             : 
      73             : private:
      74             :     ::canvas::tools::ElapsedTime    maTimer;
      75             :     double                          mnNextTime;
      76             :     ActivitySharedPtr               mpActivity;
      77             :     ActivitiesQueue&                mrActivityQueue;
      78             : };
      79             : 
      80             : typedef ::boost::shared_ptr< WakeupEvent > WakeupEventSharedPtr;
      81             : 
      82             : } // namespace internal
      83             : } // namespace presentation
      84             : 
      85             : #endif /* INCLUDED_SLIDESHOW_WAKEUPEVENT_HXX */
      86             : 
      87             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */