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#include "albumdelegate.h"

#include <QtGui>

AlbumDelegate::AlbumDelegate(QObject *parent)
    : QAbstractItemDelegate(parent)
{

}

AlbumDelegate::~AlbumDelegate()
{
}

void AlbumDelegate::paint(
        QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
{
    QPen oldPen = painter->pen();

    QStyle *style = QApplication::style();

    int margin = style->pixelMetric(QStyle::PM_ButtonMargin);

    QRect rect = option.rect;

    if (option.state & QStyle::State_HasFocus) {
        painter->fillRect(rect, option.palette.highlight());

        painter->setPen(option.palette.color(QPalette::HighlightedText));
    }

    rect.adjust(margin, margin, -margin, -margin);

    QRect decorationRect = rect;
    decorationRect.setRight(decorationRect.left() + option.decorationSize.width());

    QPixmap decoration = qvariant_cast<QPixmap>(index.data(Qt::DecorationRole));
    if (!decoration.isNull())
        style->drawItemPixmap(painter, decorationRect, Qt::AlignCenter, decoration);
    else
        painter->drawRect(decorationRect);

    rect.setLeft(decorationRect.right() + margin);

    QString text = index.data(Qt::DisplayRole).toString();

    QRect textRect;
    painter->drawText(rect, Qt::TextWordWrap, text, &textRect);
    rect.setTop(textRect.bottom() + margin);

    text = index.data(Artist).toString();

    painter->drawText(rect, Qt::TextWordWrap, text, &textRect);
    rect.setTop(textRect.bottom() + margin);

    QVariant trackCount = index.data(TrackCount);

    if (trackCount.isValid()) {
        text = trackCount.toInt() != 1
                ? tr("%1 Songs").arg(trackCount.toInt())
                : tr("1 Song");

        painter->drawText(rect, Qt::TextWordWrap, text, &textRect);
    }

    painter->setPen(oldPen);
}

QSize AlbumDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &) const
{
    QString placeholder = QLatin1String("This is a longish name");

    int margin = QApplication::style()->pixelMetric(QStyle::PM_ButtonMargin);

    QSize size = option.decorationSize;

    size.rheight() += 2 * margin;
    size.rwidth() += 3 * margin + option.fontMetrics.size(0, placeholder).width();

    return size;
}
