急求QT学习笔记-33.QTableView增加QCheckBox的方法，如何去掉True和False

QT学习笔记-33.QTableView增加QCheckBox的方法使用Delegate具体如下:
原博客 http://www.cppblog.com/gaimor/archive/2011/11/26/160993.html

class QLineDelegate : public QStyledItemDelegate
{
Q_OBJECT
public:
QLineDelegate(QTableView* tableView);
protected:
void paint(QPainter* painter,const QStyleOptionViewItem& option,const QModelIndex& index) const;
bool editorEvent(QEvent *event,
QAbstractItemModel *model,
const QStyleOptionViewItem &option,
const QModelIndex &index) ;
private:
QPen pen;
QTableView* view;
};

static QRect CheckBoxRect(const QStyleOptionViewItem &view_item_style_options)
{
QStyleOptionButton check_box_style_option;
QRect check_box_rect = QApplication::style()->subElementRect(
QStyle::SE_CheckBoxIndicator,
&check_box_style_option);

QPoint check_box_point(view_item_style_options.rect.x() +
view_item_style_options.rect.width() / 2 -
check_box_rect.width() / 2,
view_item_style_options.rect.y() +
view_item_style_options.rect.height() / 2 -
check_box_rect.height() / 2);
return QRect(check_box_point, check_box_rect.size());
}


QLineDelegate::QLineDelegate(QTableView* tableView)
{
int gridHint = tableView->style()->styleHint(QStyle::SH_Table_GridLineColor, new QStyleOptionViewItemV4());
QColor gridColor = static_cast<QRgb>(gridHint);
pen = QPen(gridColor,0,tableView->gridStyle());
view = tableView;
}

void QLineDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option,const QModelIndex& index)const
{
bool checked = index.model()->data(index, Qt::DisplayRole).toBool();

if(index.column() == 0)
{
QStyleOptionButton check_box_style_option;
check_box_style_option.state |= QStyle::State_Enabled;
if(checked)
{
check_box_style_option.state |= QStyle::State_On;
}
else
{
check_box_style_option.state |= QStyle::State_Off;
}
check_box_style_option.rect = CheckBoxRect(option);
QApplication::style()->drawControl(QStyle::CE_CheckBox,&check_box_style_option,painter);
}

QStyledItemDelegate::paint(painter,option,index);
QStyleOptionViewItem itemOption(option);
if(itemOption.state & QStyle::State_HasFocus)
itemOption.state = itemOption.state ^ QStyle::State_HasFocus;
QStyledItemDelegate::paint(painter,itemOption,index);
QPen oldPen = painter->pen();
painter->setPen(pen);
painter->drawLine(option.rect.topRight(),option.rect.bottomRight());
painter->drawLine(itemOption.rect.bottomLeft(),itemOption.rect.bottomRight());
painter->setPen(oldPen);
}

bool QLineDelegate::editorEvent(QEvent *event,
QAbstractItemModel *model,
const QStyleOptionViewItem &option,
const QModelIndex &index) {
if((event->type() == QEvent::MouseButtonRelease) ||
(event->type() == QEvent::MouseButtonDblClick))
{
QMouseEvent *mouse_event = static_cast<QMouseEvent*>(event);
if(mouse_event->button() != Qt::LeftButton ||
!CheckBoxRect(option).contains(mouse_event->pos()))
{
return false;
}

if(event->type() == QEvent::MouseButtonDblClick)
{
return true;
}
}
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;
}

bool checked = index.model()->data(index, Qt::DisplayRole).toBool();
return model->setData(index, !checked, Qt::EditRole);
}
不过有一个小问题，就是CheckBox旁边有false/true字符
Qt --------------------编程问答--------------------
--------------------编程问答-------------------- 如上图，只有True和False我去不掉，另外我也想要在CheckBox旁边显示字符串

补充：移动开发 ,  Qt