DelayTimer.h

/* This file is part of the UniSet project
 * Copyright (c) 2002 Free Software Foundation, Inc.
 * Copyright (c) 2002 Pavel Vainerman
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
// --------------------------------------------------------------------------
#ifndef DelayTimer_H_
#define DelayTimer_H_
// --------------------------------------------------------------------------
#include "PassiveTimer.h"
// --------------------------------------------------------------------------
class DelayTimer
{
    public:
        DelayTimer():prevState(false),state(false),
                onDelay(0),offDelay(0),waiting_on(false),waiting_off(false){}

        DelayTimer( timeout_t on_msec, timeout_t off_msec ):prevState(false),state(false),
                onDelay(on_msec),offDelay(off_msec),waiting_on(false),waiting_off(false)
        {
        }
        
        ~DelayTimer(){}
    
        inline void set( timeout_t on_msec, timeout_t off_msec )
        {
            onDelay = on_msec;
            offDelay = off_msec;
        }
        
        // запустить часы (заново)
        inline void reset()
        {
            pt.reset();
        }

        inline bool check( bool st )
        {
            if( waiting_off )
            {
                if( !st && pt.checkTime() )
                {
                    waiting_off = false;
                    state = false;
                    return state;
                }
                else if( st != prevState )
                    pt.reset();
        
                prevState = st;
                return state;
            }

            if( waiting_on )
            {
                if( st && pt.checkTime() )
                {
                    waiting_on = false;
                    state = true;
                    return state;
                }
                else if( st != prevState )
                    pt.reset();

                prevState = st;
                return state;
            }

            if( state != st )
            {
                prevState = st;
                if( st )
                {
                    pt.setTiming(onDelay);
                    waiting_on = true;
                }
                else
                {
                    pt.setTiming(offDelay);
                    waiting_off = true;
                }

                if( pt.checkTime() )
                    return st;
            }

            return state;
        }

    protected:
        PassiveTimer pt;
        bool prevState;
        bool state;
        timeout_t onDelay;
        timeout_t offDelay;
        bool waiting_on;
        bool waiting_off;
};
// --------------------------------------------------------------------------
#endif
// --------------------------------------------------------------------------