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<pre> /****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the demonstration applications of the Qt Toolkit.
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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) {
QStyleOptionViewItem opt = option;
opt.rect.adjust(0, 0, -1, -1); <span class="comment">// since we draw the grid ourselves</span>
QSqlRelationalDelegate::paint(painter, opt, index);
} else {
const QAbstractItemModel *model = index.model();
QPalette::ColorGroup cg = option.state & QStyle::State_Enabled
? QPalette::Normal : 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)); <span class="comment">// since we draw the grid ourselves</span>
}
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); <span class="comment">// since we draw the grid ourselves</span>
}
bool BookDelegate::editorEvent(QEvent *event, QAbstractItemModel *model,
const QStyleOptionViewItem &option,
const QModelIndex &index)
{
if (index.column() != 5)
return QSqlRelationalDelegate::editorEvent(event, model, option, index);
QMouseEvent *mouseEvent;
int stars;
switch (event->type()) {
case QEvent::MouseButtonPress:
mouseEvent = static_cast<QMouseEvent*>(event);
stars = qBound(0, int(0.7 + qreal(mouseEvent->pos().x()
- option.rect.x()) / star.width()), 5);
model->setData(index, QVariant(stars));
break;
default:
break;
}
return true;
}
QWidget *BookDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
if (index.column() != 4)
return QSqlRelationalDelegate::createEditor(parent, option, index);
<span class="comment">// for editing the year, return a spinbox with a range from -1000 to 2100.</span>
QSpinBox *sb = new QSpinBox(parent);
sb->setFrame(false);
sb->setMaximum(2100);
sb->setMinimum(-1000);
return sb;
}</pre>
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