playlistitem.cpp

来自「Amarok是一款在LINUX或其他类UNIX操作系统中运行的音频播放器软件。 」· C++ 代码 · 共 1,153 行 · 第 1/3 页

{
    const QRect r = listView()->itemRect( this );
    if( !r.isValid() )
        return;

    listView()->viewport()->update( listView()->header()->sectionPos( column ) - listView()->contentsX() + 1,
                                    r.y() + 1,
                                    listView()->header()->sectionSize( column ) - 2, height() - 2 );
}

bool
PlaylistItem::operator== ( const PlaylistItem & item ) const
{
    return item.url() == this->url();
}

bool
PlaylistItem::operator< ( const PlaylistItem & item ) const
{
    return item.url() < this->url();
}

PlaylistItem*
PlaylistItem::nextInAlbum() const
{
    if( !m_album )
        return 0;
    const int index = m_album->tracks.findRef( this );
    if( index == int(m_album->tracks.count() - 1) )
        return 0;
    if( index != -1 )
        return m_album->tracks.at( index + 1 );
    if( track() )
        for( int i = 0, n = m_album->tracks.count(); i < n; ++i )
	  if( m_album->tracks.at( i )->discNumber() > discNumber() || 
	      ( m_album->tracks.at( i )->discNumber() == discNumber() && m_album->tracks.at( i )->track() > track() ) )
                return m_album->tracks.at( i );
    else
        for( QListViewItemIterator it( const_cast<PlaylistItem*>(this), QListViewItemIterator::Visible ); *it; ++it )
            #define pit static_cast<PlaylistItem*>( *it )
            if( pit != this && pit->m_album == m_album && !pit->track() )
                return pit;
            #undef pit
    return 0;
}

PlaylistItem*
PlaylistItem::prevInAlbum() const
{
    if( !m_album )
        return 0;
    const int index = m_album->tracks.findRef( this );
    if( index == 0 )
        return 0;
    if( index != -1 )
        return m_album->tracks.at( index - 1 );
    if( track() )
        for( int i = m_album->tracks.count() - 1; i >= 0; --i )
            if( m_album->tracks.at( i )->track() && 
		( m_album->tracks.at( i )->discNumber() < discNumber() || 
		  ( m_album->tracks.at( i )->discNumber() == discNumber() && m_album->tracks.at( i )->track() < track() ) ) )
                return m_album->tracks.at( i );
    else
        for( QListViewItemIterator it( const_cast<PlaylistItem*>(this), QListViewItemIterator::Visible ); *it; --it )
            #define pit static_cast<PlaylistItem*>( *it )
            if( pit != this && pit->m_album == m_album && !pit->track() )
                return pit;
            #undef pit
    return 0;
}

/////////////////////////////////////////////////////////////////////////////////////
// PRIVATE METHODS
/////////////////////////////////////////////////////////////////////////////////////

int
PlaylistItem::compare( QListViewItem *i, int col, bool ascending ) const
{
    #define i static_cast<PlaylistItem*>(i)
    if( Playlist::instance()->dynamicMode() && (isEnabled() != i->isEnabled()) )
        return isEnabled() ? 1 : -1;

    //damn C++ and its lack of operator<=>
    #define cmp(a,b) ( (a < b ) ? -1 : ( a > b ) ? 1 : 0 )
    switch( col )
    {
        case Track:      return cmp( track(),     i->track() );
        case Score:      return cmp( score(),     i->score() );
        case Rating:     return cmp( rating(),    i->rating() );
        case Length:     return cmp( length(),    i->length() );
        case PlayCount:  return cmp( playCount(), i->playCount() );
        case LastPlayed: return cmp( lastPlay(),  i->lastPlay() );
        case Bitrate:    return cmp( bitrate(),   i->bitrate() );
        case Bpm:        return cmp( bpm(),       i->bpm() );
        case Filesize:   return cmp( filesize(),  i->filesize() );
        case Mood:
            return cmp( moodbar_const().hueSort(), i->moodbar_const().hueSort() );
        case Year:
            if( year() == i->year() )
                return compare( i, Artist, ascending );
            return cmp( year(), i->year() );
        case DiscNumber:
            if( discNumber() == i->discNumber() )
                return compare( i, Track, true ) * (ascending ? 1 : -1);
            return cmp( discNumber(), i->discNumber() );
    }
    #undef cmp
    #undef i

    QString a =    text( col ).lower();
    QString b = i->text( col ).lower();

    switch( col )
    {
        case Type:
            a = a.rightJustify( b.length(), '0' );
            b = b.rightJustify( a.length(), '0' );
            break;

        case Artist:
            if( a == b ) //if same artist, try to sort by album
                return compare( i, Album, ascending );
            else
            {
                if( a.startsWith( "the ", false ) )
                    a = a.mid( 4 );
                if( b.startsWith( "the ", false ) )
                    b = b.mid( 4 );
            }
            break;

        case Album:
            if( a == b ) //if same album, try to sort by track
                //TODO only sort in ascending order?
                return compare( i, DiscNumber, true ) * (ascending ? 1 : -1);
            break;
    }

    return QString::localeAwareCompare( a, b );
}

void PlaylistItem::paintCell( QPainter *painter, const QColorGroup &cg, int column, int width, int align )
{
    //TODO add spacing on either side of items
    //p->translate( 2, 0 ); width -= 3;

    // Don't try to draw if width or height is 0, as this crashes Qt
    if( !painter || !listView() || width <= 0 || height() == 0 )
        return;

    static const QImage currentTrackLeft  = locate( "data", "amarok/images/currenttrack_bar_left.png" );
    static const QImage currentTrackMid   = locate( "data", "amarok/images/currenttrack_bar_mid.png" );
    static const QImage currentTrackRight = locate( "data", "amarok/images/currenttrack_bar_right.png" );

    if( column == Mood  &&  !moodbar().dataExists() )
      moodbar().load();  // Only has an effect the first time
    // The moodbar column can have text in it, like "Calculating".
    // moodbarType is 0 if column != Mood, 1 if we're displaying
    // a moodbar, and 2 if we're displaying text
    const int moodbarType =
        column != Mood ? 0 : moodbar().state() == Moodbar::Loaded ? 1 : 2;

    const QString colText = text( column );
    const bool isCurrent = this == listView()->currentTrack();

    QPixmap buf( width, height() );
    QPainter p( &buf, true );

    if( isCurrent )
    {
        static paintCacheItem paintCache[NUM_COLUMNS];

        // Convert intensity to string, so we can use it as a key
        const QString colorKey = QString::number( glowIntensity );

        const bool cacheValid =
            paintCache[column].width == width &&
            paintCache[column].height == height() &&
            paintCache[column].text == colText &&
            paintCache[column].font == painter->font() &&
            paintCache[column].color == glowBase &&
            paintCache[column].selected == isSelected() &&
            !s_pixmapChanged;

            // If any parameter changed, we must regenerate all pixmaps
            if ( !cacheValid )
            {
                for( int i = 0; i < NUM_COLUMNS; ++i)
                    paintCache[i].map.clear();
                s_pixmapChanged = false;
            }

            // Determine if we need to repaint the pixmap, or paint from cache
            if ( paintCache[column].map.find( colorKey ) == paintCache[column].map.end() )
            {
                // Update painting cache
                paintCache[column].width = width;
                paintCache[column].height = height();
                paintCache[column].text = colText;
                paintCache[column].font = painter->font();
                paintCache[column].color = glowBase;
                paintCache[column].selected = isSelected();

                QColor bg;
                if( isSelected() )
                    bg = listView()->colorGroup().highlight();
                else
                    bg = isAlternate() ? listView()->alternateBackground() :
                                        listView()->viewport()->backgroundColor();

                buf.fill( bg );

                // Draw column divider line
                p.setPen( listView()->viewport()->colorGroup().mid() );
                p.drawLine( width - 1, 0, width - 1, height() - 1 );

                // Here we draw the background bar graphics for the current track:
                //
                // Illustration of design, L = Left, M = Middle, R = Right:
                // <LMMMMMMMMMMMMMMMR>

                int leftOffset  = 0;
                int rightOffset = 0;
                int margin      = listView()->itemMargin();

                const float  colorize  = 0.8;
                const double intensity = 1.0 - glowIntensity * 0.021;

                // Left part
                if( column == listView()->m_firstColumn ) {
                    QImage tmpImage = currentTrackLeft.smoothScale( 1, height(), QImage::ScaleMax );
                    KIconEffect::colorize( tmpImage, glowBase, colorize );
                    imageTransparency( tmpImage, intensity );
                    p.drawImage( 0, 0, tmpImage, 0, 0, tmpImage.width() - 1 ); //HACK
                    leftOffset = tmpImage.width() - 1; //HACK Subtracting 1, to work around the black line bug
                    margin += 6;
                }

                // Right part
                else
                if( column == Playlist::instance()->mapToLogicalColumn( Playlist::instance()->numVisibleColumns() - 1 ) )
                {
                    QImage tmpImage = currentTrackRight.smoothScale( 1, height(), QImage::ScaleMax );
                    KIconEffect::colorize( tmpImage, glowBase, colorize );
                    imageTransparency( tmpImage, intensity );
                    p.drawImage( width - tmpImage.width(), 0, tmpImage );
                    rightOffset = tmpImage.width();
                    margin += 6;
                }

                // Middle part
                // Here we scale the one pixel wide middel image to stretch to the full column width.
                QImage tmpImage = currentTrackMid.copy();
                KIconEffect::colorize( tmpImage, glowBase, colorize );
                imageTransparency( tmpImage, intensity );
                tmpImage = tmpImage.smoothScale( width - leftOffset - rightOffset, height() );
                p.drawImage( leftOffset, 0, tmpImage );


                // Draw the pixmap, if present
                int leftMargin = margin;
                if ( pixmap( column ) ) {
                    p.drawPixmap( leftMargin, height() / 2 - pixmap( column )->height() / 2, *pixmap( column ) );
                    leftMargin += pixmap( column )->width() + 2;
                }

                if( align != Qt::AlignCenter )
                align |= Qt::AlignVCenter;

                if( column != Rating  &&
                    moodbarType != 1 )
                {
                    // Draw the text
                    static QFont font;
                    static int minbearing = 1337 + 666;
                    if( minbearing == 2003 || font != painter->font() )
                    {
                        font = painter->font();
                        minbearing = painter->fontMetrics().minLeftBearing()
                                    + painter->fontMetrics().minRightBearing();
                    }
                    const bool italic = font.italic();
                    int state = EngineController::engine()->state();
                    if( state == Engine::Playing || state == Engine::Paused )
                        font.setItalic( !italic );
                    p.setFont( font );
                    p.setPen( cg.highlightedText() );
//                  paint.setPen( glowText );
                    const int _width = width - leftMargin - margin + minbearing - 1; // -1 seems to be necessary
                    const QString _text = KStringHandler::rPixelSqueeze( colText, painter->fontMetrics(), _width );
                    p.drawText( leftMargin, 0, _width, height(), align, _text );
                    font.setItalic( italic );
                    p.setFont( font );
                }

                paintCache[column].map[colorKey] = buf;
            }
            else
                p.drawPixmap( 0, 0, paintCache[column].map[colorKey] );
            if( column == Rating )
                drawRating( &p );
            if( moodbarType == 1 )
                drawMood( &p, width, height() );
        }
    else
    {
        const QColorGroup _cg = ( !exists() || !isEnabled() )
                                ? listView()->palette().disabled()
                                : listView()->palette().active();

        QColor bg = isSelected()  ? _cg.highlight()
                    : isAlternate() ? listView()->alternateBackground()
                    : listView()->viewport()->backgroundColor();
        #if KDE_IS_VERSION( 3, 3, 91 )
        if( listView()->shadeSortColumn() && !isSelected() && listView()->columnSorted() == column )
        {
            /* from klistview.cpp
                Copyright (C) 2000 Reginald Stadlbauer <[e-mail]>
                Copyright (C) 2000,2003 Charles Samuels <[e-mail]>
                Copyright (C) 2000 Peter Putzer */
            if ( bg == Qt::black )
                bg = QColor(55, 55, 55);  // dark gray
            else
            {
                int h,s,v;
                bg.hsv(&h, &s, &v);
                if ( v > 175 )
                    bg = bg.dark(104);
                else
                    bg = bg.light(120);
            }
        }
        #endif

        const QColor textc = isSelected() ? _cg.highlightedText() : _cg.text();

        buf.fill( bg );

        // Draw column divider line
        if( !isSelected() )
        {
            p.setPen( listView()->viewport()->colorGroup().mid() );
            p.drawLine( width - 1, 0, width - 1, height() - 1 );
        }

        // Draw the pixmap, if present
        int margin = listView()->itemMargin(), leftMargin = margin;
        if ( pixmap( column ) ) {
            p.drawPixmap( leftMargin, height() / 2 - pixmap( column )->height() / 2, *pixmap( column ) );
            leftMargin += pixmap( column )->width();
        }

        if( align != Qt::AlignCenter )
            align |= Qt::AlignVCenter;

        if( column == Rating )
            drawRating( &p );
        else if( moodbarType == 1 )
            drawMood( &p, width, height() );
        else
        {
            // Draw the text
            static QFont font;
            static int minbearing = 1337 + 666; //can be 0 or negative, 2003 is less likely
            if( minbearing == 2003 || font != painter->font() )
            {
                font = painter->font(); //getting your bearings can be expensive, so we cache them
                minbearing = painter->fontMetrics().minLeftBearing()
                                + painter->fontMetrics().minRightBearing();
            }
            p.setFont( font );
            p.setPen( ( m_isNew && isEnabled() && !isSelected() ) ? AmarokConfig::newPlaylistItemsColor() : textc );
            
            const int _width = width - leftMargin - margin + minbearing - 1; // -1 seems to be necessary
            const QString _text = KStringHandler::rPixelSqueeze( colText, painter->fontMetrics(), _width );
            p.drawText( leftMargin, 0, _width, height(), align, _text );
        }
    }
    /// Track action symbols
    const int  queue       = listView()->m_nextTracks.findRef( this ) + 1;
    const bool stop        = ( this == listView()->m_stopAfterTrack );
    const bool repeat      = Amarok::repeatTrack() && isCurrent;

    const uint num = ( queue ? 1 : 0 ) + ( stop ? 1 : 0 ) + ( repeat ? 1 : 0 );