#include <QtGui>
class ItemDelegate : public QItemDelegate
{
public:
ItemDelegate(QObject *parent = 0)
: QItemDelegate(parent)
{
}
virtual void drawCheck(QPainter *painter, const QStyleOptionViewItem &option,
const QRect &, Qt::CheckState state)const
{
const int textMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
QRect checkRect = QStyle::alignedRect(option.direction, Qt::AlignCenter,
check(option, option.rect, Qt::Checked).size(),
QRect(option.rect.x() + textMargin, option.rect.y(),
option.rect.width() - (textMargin * 2), option.rect.height()));
QItemDelegate::drawCheck(painter, option, checkRect, state);
}
virtual bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option,
const QModelIndex &index)
{
Q_ASSERT(event);
Q_ASSERT(model);
Qt::ItemFlags flags = model->flags(index);
if(!(flags & Qt::ItemIsUserCheckable) || !(flags & Qt::ItemIsEnabled))
return false;
QVariant value = index.data(Qt::CheckStateRole);
if(!value.isValid())
return false;
if(event->type() == QEvent::MouseButtonRelease)
{
const int textMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
QRect checkRect = QStyle::alignedRect(option.direction, Qt::AlignCenter,
check(option, option.rect, Qt::Checked).size(),
QRect(option.rect.x() + textMargin, option.rect.y(),
option.rect.width() - (2 * textMargin), option.rect.height()));
if (!checkRect.contains(static_cast<QMouseEvent*>(event)->pos()))
return false;
}
else if(event->type() == QEvent::KeyPress)
{
if(static_cast<QKeyEvent*>(event)->key() != Qt::Key_Space
&& static_cast<QKeyEvent*>(event)->key() != Qt::Key_Select)
return false;
}
else
{
return false;
}
Qt::CheckState state = (static_cast<Qt::CheckState>(value.toInt()) == Qt::Checked
? Qt::Unchecked : Qt::Checked);
//! 
return model->setData(index, state, Qt::CheckStateRole);
}
void drawFocus(QPainter *painter, const QStyleOptionViewItem &option, const QRect &rect) const
{
QItemDelegate::drawFocus(painter, option, option.rect);
}
};
static int ROWS = 3;
static int COLS = 3;
class Table : public QTableWidget
{
public:
Table(QWidget *parent = 0)
: QTableWidget(ROWS, COLS, parent)
{
setItemDelegate(new ItemDelegate(this));
QTableWidgetItem *item = 0;
for(int i=0; i<rowCount(); ++i)
{
for(int j=0; j<columnCount(); ++j)
{
setItem(i, j, item = new QTableWidgetItem);
QTableViewItem;
item->setFlags(Qt::ItemIsEnabled|Qt::ItemIsUserCheckable);
item->setCheckState((i+j) % 2 == 0 ? Qt::Checked : Qt::Unchecked);
}
}
}
};
int main(int argc, char **argv)
{
QApplication a(argc, argv);
Table w;
w.show();
return a.exec();
}