C++ TreeModelItem::artist方法代码示例

void
TreeModel::getCover( const QModelIndex& index )
{
    TreeModelItem* item = itemFromIndex( index );
    if ( !item->cover.isNull() )
        return;

    Tomahawk::InfoSystem::InfoStringHash trackInfo;
    Tomahawk::InfoSystem::InfoRequestData requestData;

    if ( !item->artist().isNull() )
    {
        trackInfo["artist"] = item->artist()->name();
        requestData.type = Tomahawk::InfoSystem::InfoArtistImages;
    }
    else if ( !item->album().isNull() )
    {
        trackInfo["artist"] = item->album()->artist()->name();
        trackInfo["album"] = item->album()->name();
        requestData.type = Tomahawk::InfoSystem::InfoAlbumCoverArt;
    }
    else
        return;

    trackInfo["pptr"] = QString::number( (qlonglong)item );
    m_coverHash.insert( (qlonglong)item, index );

    requestData.caller = m_infoId;
    requestData.input = QVariant::fromValue< Tomahawk::InfoSystem::InfoStringHash >( trackInfo );
    requestData.customData = QVariantMap();
    Tomahawk::InfoSystem::InfoSystem::instance()->getInfo( requestData );
}

void
TreeModel::getCover( const QModelIndex& index )
{
    TreeModelItem* item = itemFromIndex( index );

    if ( !item->artist().isNull() && !item->artist()->infoLoaded() )
        item->artist()->cover( QSize( 0, 0 ) );
    else if ( !item->album().isNull() && !item->album()->infoLoaded() )
        item->album()->cover( QSize( 0, 0 ) );
}

void
ArtistView::onItemActivated( const QModelIndex& index )
{
    TreeModelItem* item = m_model->itemFromIndex( m_proxyModel->mapToSource( index ) );
    if ( item )
    {
        if ( !item->artist().isNull() )
            ViewManager::instance()->show( item->artist() );
        else if ( !item->album().isNull() )
            ViewManager::instance()->show( item->album() );
        else if ( !item->result().isNull() )
            AudioEngine::instance()->playItem( 0, item->result() );
    }
}

void
ArtistView::onScrollTimeout()
{
    qDebug() << Q_FUNC_INFO;
    if ( m_timer.isActive() )
        m_timer.stop();

    QModelIndex left = indexAt( viewport()->rect().topLeft() );
    while ( left.isValid() && left.parent().isValid() )
        left = left.parent();

    QModelIndex right = indexAt( viewport()->rect().bottomLeft() );
    while ( right.isValid() && right.parent().isValid() )
        right = right.parent();

    int max = m_proxyModel->trackCount();
    if ( right.isValid() )
        max = right.row() + 1;

    for ( int i = left.row(); i < max; i++ )
    {
        TreeModelItem* item = m_model->itemFromIndex( m_proxyModel->mapToSource( m_proxyModel->index( i, 0 ) ) );

        Tomahawk::InfoSystem::InfoCriteriaHash trackInfo;
        trackInfo["artist"] = item->artist()->name();
        trackInfo["pptr"] = QString::number( (qlonglong)item );

        Tomahawk::InfoSystem::InfoSystem::instance()->getInfo(
            s_tmInfoIdentifier, Tomahawk::InfoSystem::InfoArtistImages,
            QVariant::fromValue< Tomahawk::InfoSystem::InfoCriteriaHash >( trackInfo ), Tomahawk::InfoSystem::InfoCustomData() );
    }
}

void
ArtistView::onItemActivated( const QModelIndex& index )
{
    TreeModelItem* item = m_model->itemFromIndex( m_proxyModel->mapToSource( index ) );
    if ( item )
    {
        if ( !item->artist().isNull() )
            ViewManager::instance()->show( item->artist() );
        else if ( !item->album().isNull() )
            ViewManager::instance()->show( item->album(), m_model->mode() );
        else if ( !item->result().isNull() && item->result()->isOnline() )
        {
            m_model->setCurrentItem( item->index );
            AudioEngine::instance()->playItem( m_proxyModel->playlistInterface(), item->result() );
        }
    }
}

bool
TreeModel::hasChildren( const QModelIndex& parent ) const
{
    TreeModelItem* parentItem = itemFromIndex( parent );
    if ( !parentItem )
        return false;

    if ( parentItem == m_rootItem )
        return true;

    return ( !parentItem->artist().isNull() || !parentItem->album().isNull() );
}

void
TreeProxyModel::onRowsInserted( const QModelIndex& parent, int /* start */, int /* end */ )
{
    if ( m_filter.isEmpty() )
        return;
    if ( sender() != m_model )
        return;

    TreeModelItem* pi = m_model->itemFromIndex( m_model->index( parent.row(), 0, parent.parent() ) );
    if ( pi->artist().isNull() )
        return;

    DatabaseCommand_AllAlbums* cmd = new DatabaseCommand_AllAlbums( m_model->collection() );
    cmd->setArtist( pi->artist() );
    cmd->setFilter( m_filter );

    connect( cmd, SIGNAL( albums( QList<Tomahawk::album_ptr>, QVariant ) ),
                    SLOT( onFilterAlbums( QList<Tomahawk::album_ptr> ) ) );

    Database::instance()->enqueue( QSharedPointer<DatabaseCommand>( cmd ) );
}

void
TreeItemDelegate::paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
    TreeModelItem* item = m_model->sourceModel()->itemFromIndex( m_model->mapToSource( index ) );
    if ( !item )
        return;

    QString text;
    if ( !item->artist().isNull() )
    {
        text = item->artist()->name();
    }
    else if ( !item->album().isNull() )
    {
        text = item->album()->name();
    }
    else if ( !item->result().isNull() || !item->query().isNull() )
    {
        float opacity = item->result().isNull() ? 0.0 : item->result()->score();
        opacity = qMax( (float)0.3, opacity );
        QColor textColor = TomahawkUtils::alphaBlend( option.palette.color( QPalette::Foreground ), option.palette.color( QPalette::Background ), opacity );

        {
            QStyleOptionViewItemV4 o = option;
            initStyleOption( &o, QModelIndex() );

            painter->save();
            o.palette.setColor( QPalette::Text, textColor );

            if ( o.state & QStyle::State_Selected && o.state & QStyle::State_Active )
            {
                o.palette.setColor( QPalette::Text, o.palette.color( QPalette::HighlightedText ) );
            }

            if ( item->isPlaying() )
            {
                o.palette.setColor( QPalette::Highlight, o.palette.color( QPalette::Mid ) );
                if ( o.state & QStyle::State_Selected )
                    o.palette.setColor( QPalette::Text, textColor );
                o.state |= QStyle::State_Selected;
            }

            int oldX = 0;
            if ( m_view->header()->visualIndex( index.column() ) == 0 )
            {
                oldX = o.rect.x();
                o.rect.setX( 0 );
            }
            qApp->style()->drawControl( QStyle::CE_ItemViewItem, &o, painter );
            if ( oldX > 0 )
                o.rect.setX( oldX );

            {
                QRect r = o.rect.adjusted( 3, 0, 0, 0 );

                // Paint Now Playing Speaker Icon
                if ( item->isPlaying() && m_view->header()->visualIndex( index.column() ) == 0 )
                {
                    r.adjust( 0, 0, 0, -3 );
                    painter->drawPixmap( r.adjusted( 3, 1, 18 - r.width(), 1 ), m_nowPlayingIcon );
                    r.adjust( 25, 0, 0, 3 );
                }

                painter->setPen( o.palette.text().color() );

                QTextOption to( Qt::AlignVCenter );
                QString text = painter->fontMetrics().elidedText( index.data().toString(), Qt::ElideRight, r.width() - 3 );
                painter->drawText( r.adjusted( 0, 1, 0, 0 ), text, to );
            }
            painter->restore();
        }

        return;
    }
    else
        return;

    if ( text.trimmed().isEmpty() )
        text = tr( "Unknown" );

    QStyleOptionViewItemV4 opt = option;
    initStyleOption( &opt, QModelIndex() );
    qApp->style()->drawControl( QStyle::CE_ItemViewItem, &opt, painter );

    if ( option.state & QStyle::State_Selected )
    {
        opt.palette.setColor( QPalette::Text, opt.palette.color( QPalette::HighlightedText ) );
    }

    if ( index.column() > 0 )
        return;

    painter->save();
    painter->setRenderHint( QPainter::Antialiasing );
    painter->setPen( opt.palette.color( QPalette::Text ) );

    QRect r = option.rect.adjusted( 4, 4, -option.rect.width() + option.rect.height() - 4, -4 );
//    painter->drawPixmap( r, QPixmap( RESPATH "images/cover-shadow.png" ) );

    QPixmap cover;
//.........这里部分代码省略.........

QMimeData*
TreeModel::mimeData( const QModelIndexList &indexes ) const
{
    qDebug() << Q_FUNC_INFO;

    QByteArray resultData;
    QDataStream resultStream( &resultData, QIODevice::WriteOnly );

    // lets try with artist only
    bool fail = false;
    foreach ( const QModelIndex& i, indexes)
    {
        if ( i.column() > 0 || indexes.contains( i.parent() ) )
            continue;

        TreeModelItem* item = itemFromIndex( i );
        if ( !item )
            continue;

        if ( !item->artist().isNull() )
        {
            const artist_ptr& artist = item->artist();
            resultStream << artist->name();
        }
        else
        {
            fail = true;
            break;
        }
    }
    if ( !fail )
    {
        QMimeData* mimeData = new QMimeData();
        mimeData->setData( "application/tomahawk.metadata.artist", resultData );
        return mimeData;
    }

    // lets try with album only
    fail = false;
    resultData.clear();
    foreach ( const QModelIndex& i, indexes )
    {
        if ( i.column() > 0 || indexes.contains( i.parent() ) )
            continue;

        TreeModelItem* item = itemFromIndex( i );
        if ( !item )
            continue;

        if ( !item->album().isNull() )
        {
            const album_ptr& album = item->album();
            resultStream << album->artist()->name();
            resultStream << album->name();
        }
        else
        {
            fail = true;
            break;
        }
    }
    if ( !fail )
    {
        QMimeData* mimeData = new QMimeData();
        mimeData->setData( "application/tomahawk.metadata.album", resultData );
        return mimeData;
    }

    // lets try with tracks only
    fail = false;
    resultData.clear();
    foreach ( const QModelIndex& i, indexes )
    {
        if ( i.column() > 0 || indexes.contains( i.parent() ) )
            continue;

        TreeModelItem* item = itemFromIndex( i );
        if ( !item )
            continue;

        if ( !item->result().isNull() )
        {
            const result_ptr& result = item->result();
            resultStream << qlonglong( &result );
        }
        else
        {
            fail = true;
            break;
        }
    }
    if ( !fail )
    {
        QMimeData* mimeData = new QMimeData();
        mimeData->setData( "application/tomahawk.result.list", resultData );
        return mimeData;
    }

    // Ok... we have to use mixed
    resultData.clear();
//.........这里部分代码省略.........

QVariant
TreeModel::data( const QModelIndex& index, int role ) const
{
    TreeModelItem* entry = itemFromIndex( index );
    if ( !entry )
        return QVariant();

    if ( role == Qt::SizeHintRole )
    {
        if ( !entry->result().isNull() || !entry->query().isNull() )
        {
            return QSize( 128, 20 );
        }
        else if ( !entry->album().isNull() )
        {
            return QSize( 128, 32 );
        }
        else if ( !entry->artist().isNull() )
        {
            return QSize( 128, 44 );
        }

        return QSize( 128, 0 );
    }

    if ( role != Qt::DisplayRole ) // && role != Qt::ToolTipRole )
        return QVariant();

    if ( !entry->artist().isNull() && index.column() == Name )
    {
        return entry->artist()->name();
    }
    else if ( !entry->album().isNull() && index.column() == Name )
    {
        return entry->album()->name();
    }
    else if ( !entry->result().isNull() )
    {
        const result_ptr& result = entry->result();
        unsigned int discnumber = 0;
        if ( !entry->query().isNull() )
            discnumber = entry->query()->discnumber();
        if ( discnumber == 0 )
            discnumber = result->discnumber();

        unsigned int albumpos = 0;
        if ( !entry->query().isNull() )
            albumpos = entry->query()->albumpos();
        if ( albumpos == 0 )
            albumpos = result->albumpos();

        switch( index.column() )
        {
            case Name:
                return QString( "%1%2%3" ).arg( discnumber > 0 ? QString( "%1." ).arg( discnumber ) : QString() )
                                          .arg( albumpos > 0 ? QString( "%1. ").arg( albumpos ) : QString() )
                                          .arg( result->track() );

            case Duration:
                return TomahawkUtils::timeToString( result->duration() );

            case Bitrate:
                if ( result->bitrate() > 0 )
                    return result->bitrate();
                break;

            case Age:
                return TomahawkUtils::ageToString( QDateTime::fromTime_t( result->modificationTime() ) );

            case Year:
                if ( result->year() != 0 )
                    return result->year();
                break;

            case Filesize:
                return TomahawkUtils::filesizeToString( result->size() );

            case Origin:
                return result->friendlySource();

            case AlbumPosition:
                return result->albumpos();

            case Composer:
                if ( !result->composer().isNull() )
                    return result->composer()->name();
                break;

            default:
                return QVariant();
        }
    }
    else if ( !entry->query().isNull() )
    {
        const query_ptr& query = entry->query();
        switch( index.column() )
        {
            case Name:
                return QString( "%1%2%3" ).arg( query->discnumber() > 0 ? QString( "%1." ).arg( query->discnumber() ) : QString() )
                                          .arg( query->albumpos() > 0 ? QString( "%1. ").arg( query->albumpos() ) : QString() )
//.........这里部分代码省略.........