/*
 * pollingtunecontroller.cpp
 * Copyright (C) 2006  Remko Troncon
 *
 * 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 */

#include <QTimer>

#include "tune.h"
#include "pollingtunecontroller.h"

/**
 * \class PollingTuneController
 * \brief A base class for a controller that uses polling to retrieve the  currently playing song.
 *
 * An implementing class only has to implement currentTune(), and the correct
 * signals will be emitted.
 */


/**
 * \brief Constructs the controller.
 */
PollingTuneController::PollingTuneController()
{
    connect(&_timer, SIGNAL(timeout()), SLOT(check()));
    _timer.setInterval(DefaultInterval);
}

/**
 * Polls for new song info.
 */
void PollingTuneController::check()
{
    Tune tune = currentTune();
    if (_prevTune != tune) {
        _prevTune = tune;
        if (tune.isNull()) {
            emit stopped();
        }
        else {
            emit playing(tune);
        }
    }
}
