C++ Playlist::getActiveSongNumber方法代码示例

void PlaylistDialog::o_downBClicked()
{
	timer->stop();
	Playlist* pList = Playlist::get_instance();

	QTreeWidget* m_pPlaylist = m_pPlaylistTree;
	int length = m_pPlaylist->topLevelItemCount();
	QTreeWidgetItem* m_pPlaylistItem = m_pPlaylistTree->currentItem();
	int index = m_pPlaylist->indexOfTopLevelItem ( m_pPlaylistItem );

	if ( index == length - 1){
		timer->start( 1000 );
		return;
	}


	QTreeWidgetItem* tmpPlaylistItem = m_pPlaylist->takeTopLevelItem ( index );

	m_pPlaylist->insertTopLevelItem ( index +1, tmpPlaylistItem );
	m_pPlaylist->setCurrentItem ( tmpPlaylistItem );

	if ( pList->getSelectedSongNr() >= 0 )
		pList->setSelectedSongNr( pList->getSelectedSongNr() +1 );

	if (pList ->getActiveSongNumber() == index ){
		pList->setActiveSongNumber( pList->getActiveSongNumber() +1 );
	}else if ( pList->getActiveSongNumber() == index +1 ){
		pList->setActiveSongNumber( pList->getActiveSongNumber() -1 );
	}
	updatePlayListVector();

}

bool setSong( int songnumber ) {
	Hydrogen *pEngine = Hydrogen::get_instance();
	Playlist *PL = Playlist::get_instance();

	int asn = PL->getActiveSongNumber();
	if(asn != songnumber && songnumber >= 0 && songnumber <= pEngine->m_PlayList.size()-1){
		PL->setNextSongByNumber( songnumber );
	}
	return true;
}

//.........这里部分代码省略.........
			/* imo, jack sessions use jack as default audio driver.
			 * hydrogen remember last used audiodriver.
			 * here we make it save that hydrogen start in a jacksession case
			 * every time with jack as audio driver
			 */
			preferences->m_sAudioDriver = "Jack";

		}
		/* the use of applicationFilePath() make it
		 * possible to use different executables.
		 * for example if you start hydrogen from a local
		 * build directory.
		 */
//		QString path = pQApp->applicationFilePath();
//		preferences->setJackSessionApplicationPath ( path );
#endif
		Hydrogen::create_instance();
		Hydrogen *pHydrogen = Hydrogen::get_instance();
		Song *pSong = NULL;
		Playlist *pPlaylist = NULL;

		// Load playlist
		if ( ! playlistFilename.isEmpty() ) {
			pPlaylist = Playlist::load ( playlistFilename );
			if ( ! pPlaylist ) {
				___ERRORLOG( "Error loading the playlist" );
				return 0;
			}

			/* Load first song */
			preferences->setLastPlaylistFilename( playlistFilename );
			pPlaylist->loadSong( 0 );
			pSong = pHydrogen->getSong();
			show_playlist ( pHydrogen, pPlaylist->getActiveSongNumber() );
		}

		// Load song - if wasn't already loaded with playlist
		if ( ! pSong ) {
			if ( !songFilename.isEmpty() ) {
				pSong = Song::load( songFilename );
			} else {
				/* Try load last song */
				bool restoreLastSong = preferences->isRestoreLastSongEnabled();
				QString filename = preferences->getLastSongFilename();
				if ( restoreLastSong && ( !filename.isEmpty() ))
					pSong = Song::load( filename );
			}

			/* Still not loaded */
			if (! pSong) {
				___INFOLOG("Starting with empty song");
				pSong = Song::get_empty_song();
				pSong->set_filename( "" );
			}

			pHydrogen->setSong( pSong );
			preferences->setLastSongFilename( songFilename );
		}

		if ( ! drumkitToLoad.isEmpty() ){
			Drumkit* drumkitInfo = Drumkit::load_by_name( drumkitToLoad, true );
			if ( drumkitInfo ) {
				pHydrogen->loadDrumkit( drumkitInfo );
			} else {
				___ERRORLOG ( "Error loading the drumkit" );
			}

void PlaylistDialog::o_upBClicked()
{
	timer->stop();

	Playlist* pPlaylist = Playlist::get_instance();

	QTreeWidget* pPlaylistTree = m_pPlaylistTree;
	QTreeWidgetItem* pPlaylistTreeItem = m_pPlaylistTree->currentItem();
	int index = pPlaylistTree->indexOfTopLevelItem ( pPlaylistTreeItem );

	if (index == 0 ){
		timer->start( 1000 );
		return;
	}

	QTreeWidgetItem* tmpPlaylistItem = pPlaylistTree->takeTopLevelItem ( index );

	pPlaylistTree->insertTopLevelItem ( index -1, tmpPlaylistItem );
	pPlaylistTree->setCurrentItem ( tmpPlaylistItem );

	if ( pPlaylist->getSelectedSongNr() >= 0 ){
		pPlaylist->setSelectedSongNr( pPlaylist->getSelectedSongNr() -1 );
	}

	if ( pPlaylist->getActiveSongNumber() == index ){
		pPlaylist->setActiveSongNumber( pPlaylist->getActiveSongNumber() -1 );
	}else if ( pPlaylist->getActiveSongNumber() == index -1 ){
		pPlaylist->setActiveSongNumber( pPlaylist->getActiveSongNumber() +1 );
	}

	updatePlayListVector();
}