| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| #ifndef INCLUDED_SLIDESHOW_WAKEUPEVENT_HXX |
| #define INCLUDED_SLIDESHOW_WAKEUPEVENT_HXX |
| |
| #include <canvas/elapsedtime.hxx> |
| |
| #include "event.hxx" |
| #include "activitiesqueue.hxx" |
| |
| #include <boost/bind.hpp> |
| #include <boost/noncopyable.hpp> |
| |
| namespace slideshow { |
| namespace internal { |
| |
| /** Little helper class, used to set Activities active again |
| after some sleep period. |
| |
| Clients can use this class to schedule wakeup events at |
| the EventQueue, to avoid busy-waiting for the next |
| discrete time instant. |
| */ |
| class WakeupEvent : public Event, |
| private ::boost::noncopyable |
| { |
| public: |
| WakeupEvent( |
| ::boost::shared_ptr< ::canvas::tools::ElapsedTime > const& pTimeBase, |
| ActivitiesQueue & rActivityQueue ); |
| |
| virtual void dispose(); |
| virtual bool fire(); |
| virtual bool isCharged() const; |
| virtual double getActivationTime( double nCurrentTime ) const; |
| |
| /// Start the internal timer |
| void start(); |
| |
| /** Set the next timeout this object should generate. |
| |
| @param nextTime |
| Absolute time, measured from the last start() call, |
| when this event should wakeup the Activity again. If |
| your time is relative, simply call start() just before |
| every setNextTimeout() call. |
| */ |
| void setNextTimeout( double nextTime ); |
| |
| /** Set activity to wakeup. |
| |
| The activity given here will be reinserted into the |
| ActivitiesQueue, once the timeout is reached. |
| */ |
| void setActivity( const ActivitySharedPtr& rActivity ); |
| |
| private: |
| ::canvas::tools::ElapsedTime maTimer; |
| double mnNextTime; |
| ActivitySharedPtr mpActivity; |
| ActivitiesQueue& mrActivityQueue; |
| }; |
| |
| typedef ::boost::shared_ptr< WakeupEvent > WakeupEventSharedPtr; |
| |
| } // namespace internal |
| } // namespace presentation |
| |
| #endif /* INCLUDED_SLIDESHOW_WAKEUPEVENT_HXX */ |