playlistinterface.cpp 2.17 KB
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/**
 * Copyright (C) 2004 Scott Wheeler <wheeler@kde.org>
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */
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#include "playlistinterface.h"

////////////////////////////////////////////////////////////////////////////////
// Watched implementation
////////////////////////////////////////////////////////////////////////////////

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void Watched::currentPlayingItemChanged()
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{
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    foreach(PlaylistObserver *observer, m_observers)
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        observer->playingItemHasChanged();
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}

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void Watched::playlistItemsChanged()
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{
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    foreach(PlaylistObserver *observer, m_observers)
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        observer->playlistItemDataHasChanged();
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}

void Watched::addObserver(PlaylistObserver *observer)
{
    m_observers.append(observer);
}

void Watched::removeObserver(PlaylistObserver *observer)
{
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    if(observer)
        observer->clearWatched();

    m_observers.removeAll(observer);
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}

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void Watched::clearObservers()
{
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    foreach(PlaylistObserver *observer, m_observers)
        observer->clearWatched();

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    m_observers.clear();
}

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Watched::~Watched()
{
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    clearObservers();
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}

////////////////////////////////////////////////////////////////////////////////
// PlaylistObserver implementation
////////////////////////////////////////////////////////////////////////////////

PlaylistObserver::~PlaylistObserver()
{
    if(m_playlist)
        m_playlist->removeObserver(this);
}

PlaylistObserver::PlaylistObserver(PlaylistInterface *playlist) :
    m_playlist(playlist)
{
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    if(m_playlist)
        playlist->addObserver(this);
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}

const PlaylistInterface *PlaylistObserver::playlist() const
{
    return m_playlist;
}
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