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#include "bookdelegate.h"

#include <QtGui>

BookDelegate::BookDelegate(QObject *parent)

    : QSqlRelationalDelegate(parent), star(QPixmap(":images/star.png"))

{

}

void BookDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,

                           const QModelIndex &index) const

{

    if (index.column() != 5) {

        QStyleOptionViewItemV3 opt = option;

        opt.rect.adjust(0, 0, -1, -1); // since we draw the grid ourselves

        QSqlRelationalDelegate::paint(painter, opt, index);

    } else {

        const QAbstractItemModel *model = index.model();

        QPalette::ColorGroup cg = (option.state & QStyle::State_Enabled) ?

            (option.state & QStyle::State_Active) ? QPalette::Normal : QPalette::Inactive : QPalette::Disabled;

        if (option.state & QStyle::State_Selected)

            painter->fillRect(option.rect, option.palette.color(cg, QPalette::Highlight));

        int rating = model->data(index, Qt::DisplayRole).toInt();

        int width = star.width();

        int height = star.height();

        int x = option.rect.x();

        int y = option.rect.y() + (option.rect.height() / 2) - (height / 2);

        for (int i = 0; i < rating; ++i) {

            painter->drawPixmap(x, y, star);

            x += width;

        }

        drawFocus(painter, option, option.rect.adjusted(0, 0, -1, -1)); // since we draw the grid ourselves

    }

    QPen pen = painter->pen();

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

    painter->drawLine(option.rect.bottomLeft(), option.rect.bottomRight());

    painter->drawLine(option.rect.topRight(), option.rect.bottomRight());

    painter->setPen(pen);

}

QSize BookDelegate::sizeHint(const QStyleOptionViewItem &option,

                                 const QModelIndex &index) const

{

    if (index.column() == 5)

        return QSize(5 * star.width(), star.height()) + QSize(1, 1);

    return QSqlRelationalDelegate::sizeHint(option, index) + QSize(1, 1); // since we draw the grid ourselves

}

bool BookDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,

                               const QStyleOptionViewItem &option,

                               const QModelIndex &index)

{

    if (index.column() != 5)

        return QSqlRelationalDelegate::editorEvent(event, model, option, index);

    if (event->type() == QEvent::MouseButtonPress) {

        QMouseEvent *mouseEvent = static_cast<QMouseEvent*>(event);

        int stars = qBound(0, int(0.7 + qreal(mouseEvent->pos().x()

            - option.rect.x()) / star.width()), 5);

        model->setData(index, QVariant(stars));

        return false; //so that the selection can change

    }

    return true;

}

QWidget *BookDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option,

                                    const QModelIndex &index) const

{

    if (index.column() != 4)

        return QSqlRelationalDelegate::createEditor(parent, option, index);

    // for editing the year, return a spinbox with a range from -1000 to 2100.

    QSpinBox *sb = new QSpinBox(parent);

    sb->setFrame(false);

    sb->setMaximum(2100);

    sb->setMinimum(-1000);

    return sb;

}