qt item delegate

#include
#include
#include
#include
#include
#include
class TransposeProxyModel : public QAbstractProxyModel
{
public:
 TransposeProxyModel(QObject *p = 0) : QAbstractProxyModel(p){}
 QModelIndex mapFromSource ( const QModelIndex & sourceIndex ) const{
  return index(sourceIndex.column(), sourceIndex.row());
 }
 QModelIndex mapToSource ( const QModelIndex & proxyIndex ) const{
  return sourceModel()->index(proxyIndex.column(), proxyIndex.row());
 }
 QModelIndex index(int r, int c, const QModelIndex &ind=QModelIndex()) const{
  return createIndex(r,c);
 }
 QModelIndex parent(const QModelIndex&) const {
  return QModelIndex();
 }
 int rowCount(const QModelIndex &) const{
  return sourceModel()->columnCount();
 }
 int columnCount(const QModelIndex &) const{
  return sourceModel()->rowCount();
 }
 QVariant data(const QModelIndex &ind, int role) const {
  return sourceModel()->data(mapToSource(ind), role);
 }   
};
class WidgetDelegate: public  QStyledItemDelegate
{
public:
 WidgetDelegate( QObject * parent = 0 )
  :QStyledItemDelegate (parent)
 {

 }
 QSize sizeHint ( const QStyleOptionViewItem & option, const QModelIndex & index ) const
 {
  return QStyledItemDelegate::sizeHint(option, index);
 }

 void paint(QPainter *painter, const QStyleOptionViewItem &option,
          const QModelIndex &index) const
 {
  if (index.column() == 1) {
   int progress = index.data().toInt();

   QStyleOptionProgressBarV2 progressBarOption;
   progressBarOption.rect = option.rect.adjusted(2,2,-2,-2);;
   progressBarOption.minimum = 0;
   progressBarOption.maximum = 100;
   progressBarOption.progress = progress;
   progressBarOption.text = QString::number(progress) + "%";
   progressBarOption.textVisible = true;
   progressBarOption.textAlignment = Qt::AlignHCenter;

   QApplication::style()->drawControl(QStyle::CE_ProgressBar,
    &progressBarOption, painter);
  } else
   QStyledItemDelegate::paint(painter, option, index);
 }
};

int main(int argc, char **argv)
{
 QApplication app(argc, argv);
 QStandardItemModel model(3,3);
 model.setData(model.index(0,0), "10");
 model.setData(model.index(0,1), "20");
 model.setData(model.index(0,2), "30");
 model.setData(model.index(1,0), "40");
 model.setData(model.index(1,1), "50");
 model.setData(model.index(1,2), "60");
 model.setData(model.index(2,0), "70");
 model.setData(model.index(2,1), "80");
 model.setData(model.index(2,2), "90");
 TransposeProxyModel trans;
 trans.setSourceModel(&model);
 QSplitter split;
 QTableView *t1 = new QTableView(&split);
 t1->setModel(&model);

 WidgetDelegate *delegate = new WidgetDelegate(t1);
 t1->setItemDelegateForColumn(1, delegate);
 QTableView *t2 = new QTableView(&split);
 t2->setModel(&trans);
 split.show();

 QString s="QTableView QTableCornerButton::section { \
 background: red; \
 border: 2px outset red;}\
 QProgressBar {\
 border-width: 0px;\
 background: blue; \
 padding:-2px -2px -2px -2px;\
 min-height:18px;\
 max-height:18px;\
}\
\
QProgressBar::chunk {\
 border-width: 0px;\
 background: red; \
}\
\
 QTableView { \
   show-decoration-selected: 1;\
  }\
\
  QTableView::item {\
  border: 0px solid #d9d9d9;\
   border-top-color: transparent;\
   border-bottom-color: transparent;\
  }\
\
  QTableView::item:hover {\
  background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #e7effd, stop: 1 #cbdaf1);\
  border: 0px solid #bfcde4;\
  }";
 app.setStyleSheet(s);

 return app.exec();
}