timedeventmanager.h

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//--- < TIMEDEVENTMANAGER.H > ---| ViewGraph - A Flexible Graph view Framework |
//
// TimedEventManager classes accept timed
// events from nodes within the scene.
// Each manager should handle one O/S window.
// 
// Give such a manager control once in a
// while to process those events.
// Events that missed their time by a 
// large value will be loudly ignored.
// 
//
// $Author: botik32 $
// $Revision: 1.2 $
// $Date: 2004/04/18 09:22:01 $
//-----------------------------------------------------------------------------/

#ifndef TIMEDEVENTMANAGER_H
#define TIMEDEVENTMANAGER_H


class Event;
class TimedEvent;
class TimedEventNode;

class TimedEventManager
{
protected:
        // defines timeout threshold to recognize 
        // late events
        int timeout;
        int eventcnt;
        TimedEventNode *eventq;
        //std::multimap<unsigned long, TimedEvent*> eventq;

        // timebase is initialized in constructor and
        // all time values are deducted this value
        unsigned long timebase;
        // currtime is advanced from a call as not to
        // waste time asking time()
        unsigned long currtime;

        // tick_events has been removed
        // updates timeleft for all the events in the queue.
        // This might seem stupid and maybe it is, but
        // it keeps the timedevents unaware of time 
        // representation. "Which is good. (c)Homer Simpson."
        // void tick_events( int delta );
public:
        TimedEventManager( int );
        void enqueue_event( int delay, Event * );
        Event* next_ready_event( void );
        
        // fixes time overlap in timebase in cases of very 
        // long uptime, should be called once every ten 
        // seconds or so
        void fix_timeoverlap( void );

        // This function updates the object's time by real time. 
        // It should be called in the main loop of your program
        void advance_time( void );

        // free the remaining timed events from the queue
        ~TimedEventManager();
};

#endif

/// $Log: timedeventmanager.h,v $
/// Revision 1.2  2004/04/18 09:22:01  botik32
/// Changes to groupnode interface, timedeventmanager interface
/// and implementation
///
/// Revision 1.1.1.1  2004/03/26 10:50:26  botik32
/// Initial release
///
/// Revision 1.1.1.1  2004/03/26 08:53:33  botik
/// initial import
///
///
/// Revision 1.1  2003/11/20 14:59:12  botik
/// Added TimedEvent and TimedEventManager class.
/// These will allow us to (hopefully) fix the
/// borderlayer scrolling which sucks badly.
///

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