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    41 

    42 #include "bookdelegate.h"

    43 

    44 #include <QtGui>

    45 

    46 BookDelegate::BookDelegate(QObject *parent)

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

    48 {

    49 }

    50 

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

    52                            const QModelIndex &index) const

    53 {

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

    55         QStyleOptionViewItemV3 opt = option;

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

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

    58     } else {

    59         const QAbstractItemModel *model = index.model();

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

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

    62 

    63         if (option.state & QStyle::State_Selected)

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

    65 

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

    67         int width = star.width();

    68         int height = star.height();

    69         int x = option.rect.x();

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

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

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

    73             x += width;

    74         }

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

    76     }

    77 

    78     QPen pen = painter->pen();

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

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

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

    82     painter->setPen(pen);

    83 }

    84 

    85 QSize BookDelegate::sizeHint(const QStyleOptionViewItem &option,

    86                                  const QModelIndex &index) const

    87 {

    88     if (index.column() == 5)

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

    90 

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

    92 }

    93 

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

    95                                const QStyleOptionViewItem &option,

    96                                const QModelIndex &index)

    97 {

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

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

   100 

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

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

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

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

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

   106         return false; //so that the selection can change

   107     }

   108 

   109     return true;

   110 }

   111 

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

   113                                     const QModelIndex &index) const

   114 {

   115     if (index.column() != 4)

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

   117 

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

   119     QSpinBox *sb = new QSpinBox(parent);

   120     sb->setFrame(false);

   121     sb->setMaximum(2100);

   122     sb->setMinimum(-1000);

   123 

   124     return sb;

   125 }

   126