qmplaylistbrowseritem.cpp

可以播放MP3,wma等文件格式的播放器

/* qmplaylistbrowseritem.cpp
 *
 * $Id: qmplaylistbrowseritem.cpp,v 1.16.2.2 2002/10/11 06:39:03 kyllingstad Exp $
 *
 * Apollo sound player: http://www.apolloplayer.org
 * Copyright(C) 2000-2002 Apollo Team.  See CREDITS file.
 *
 * 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.
 *
 * The GNU General Public License is also available online at:
 *
 * http://www.gnu.org/copyleft/gpl.html
 */

#include "qmplaylistbrowseritem.h"
#include "qmconfig.h"
#include "qmpixmapsupplier.h"

#include <qtextstream.h>

/* Disables false warning in Visual Studio about dynamic_cast */

#ifdef _WS_WIN_
#pragma warning(disable: 4541)
#endif

/**
 * @file qmplaylistbrowseritem.cpp
 * @brief A playlist, can contain other playlists
 */

/*!
  \class QmPlayListBrowserItem qmplaylistbrowseritem.h
  \brief Represents a playlist item in the playlist tree (browser).

  Do not confuse this class with QmPlayListItem.  Instances of QmPlayListItem
  are in the playlist itself, that is, folders and songs, which are traversed
  and played.

  Items of QmPlayListBrowserItem represents entire either playlists or folders
  in the playlist tree.

  The difference between a folder and a playlist are:

  <ul>
  <li>A playlist cannot contain other folders (folder here not being a directory
  in the filesystem but a playlist container in the playlist tree).</li>
  <li>A folder does not have a filename.</li>
  </ul>

  \todo We may want unify these two concepts somehow?
*/


/*!
  Creates a root item to be placed in the playlist browser (selector) \a parent.
  The \a name is the visible text of the item.  The \a filename is the filename
  of the playlist.  However, if \a is_folder is true, \a filename will be not be
  used, although it can still be retrieved through QmBrowserItem::fileName().
  The \a is_folder argument specifies whether the item is to be a playlist or
  a folder of playlists/folders.
*/

QmPlayListBrowserItem::QmPlayListBrowserItem(
	QListView *parent,
    QListViewItem *after,
	const QString &name,
	const QString &playlist,
	bool isFolder)
	: QmBrowserItem(parent, after, name, playlist),
	  m_IsFolder(isFolder)
{
    init();
}


/*!
  \overload
 */

QmPlayListBrowserItem::QmPlayListBrowserItem(
	QmPlayListBrowserItem *parent,
    QListViewItem *after,
	const QString &name,
	const QString &playlist,
	bool is_folder)
	: QmBrowserItem(parent, after, name, playlist),
	  m_IsFolder(is_folder)
{
    init();
}


void
QmPlayListBrowserItem::init()
{
    QmPixmapSupplier *sup = QmPixmapSupplier::instance();
    if ( m_IsFolder )
        setPixmap( 0, sup->pixmap( "icons-folder" ) );
    else
        setPixmap( 0, sup->pixmap( "icons-playlist" ) );
}

/*!

*/

QmPlayListBrowserItem::~QmPlayListBrowserItem()
{
}


/*!
  \return True if this item is a folder, false otherwise.
*/

bool
QmPlayListBrowserItem::isFolder() const
{
	return m_IsFolder;
}


/*!
  Saves the item to \a out.  Unlike QmBrowserItem::save(QTextStream&), this
  saves \e all items, regardless of depth.
*/

void
QmPlayListBrowserItem::save(
	QTextStream &out) const
{
	QListViewItemIterator it(listView());
	save(out, it);

	// Debug: Dump to stdout.
//	QTextStream q_cout( stdout, IO_WriteOnly );
//	save(q_cout, it);
}


/*!
  Recursive helper function for save(QTextStream &).  \a out is the same as in
  the other save function.
 */

void
QmPlayListBrowserItem::save(
	QTextStream &out,
	QListViewItemIterator &it) const
{
	QmBrowserItem *item;
	QmPlayListBrowserItem *pitem;
    QString tag;

	while(it.current() != 0)
	{
		item = dynamic_cast<QmBrowserItem*>(it.current());
		CHECK_PTR(item);
		pitem = dynamic_cast<QmPlayListBrowserItem*>(item);
		CHECK_PTR(pitem);

		QString s1(QmConfig::indent(item->depth() + 1));
		QString s2(QmConfig::indent(item->depth() + 2));

		if( pitem->isFolder() )
            tag = "dir";
        else
            tag = "playlist";
		out << s1 << "<" << tag << ">\n"
			<< s2 << "<name>" << "<![CDATA[" << item->text(0) << "]]>" << "</name>\n";

		if( ! pitem->isFolder() )
			out << s2 << "<path>" << "<![CDATA[" << pitem->fileName() << "]]>" << "</path>\n";

		out	<< s2 << "<open>" << item->isOpen() << "</open>\n";

		++it;

		if(it.current() == 0)
		{
			out << s1 << "</" << tag << ">\n";
			break;
		}
		else
		{
			if(it.current()->depth() == item->depth())
				out << s1 << "</" << tag << ">\n";
			else if(it.current()->depth() > item->depth())
			{
				save(out, it);
				out << s1 << "</" << tag << ">\n";
			}
			else
			{
				out << s1 << "</" << tag << ">\n";
				return;
			}
		}
	}
}