问如何在Qt的QRadioButton上设置下标和上标

EN

void QRadioButtonRichtTextSupport::paintEvent(QPaintEvent* event)
{
  // First draw the original content of the radio button - the circle and the plain text
  QRadioButton::paintEvent(event);

  // Get the rectangle of the paint event
  QRect _rect = event->rect();
  QPainter painter(this);
  painter.setRenderHint(QPainter::Antialiasing, true);

  // Erase the text - I have used a translation of 16 along the X axis
  // from the top left corner of the paint rectangle but there might be 
  // some less dirty way of doing this. Basically this is used to leave 
  // the circle of the radio button intact while erasing the text part
  painter.eraseRect(_rect.topLeft().x()+16, _rect.topLeft().y(), _rect.width()-16, _rect.height());

  // Translate the painter along the X axis with 16
  painter.translate(QPointF(16, 0));
  // Create a text document which supports rich text formatting
  QTextDocument label;
  label.setHtml(this->text());
  // and finally draw the text over the radio button starting from +16 along the X axis
  label.drawContents(&painter);
  painter.end();
}

Widget::Widget(QWidget *parent)
  : QWidget(parent)
{
  setLayout(&this->layout);
  // Create the custom radio button. Notice that I've also added a string argument (not present in the default constructor of QRadioButton)
  // to add the ability to set the text upon initialization. This is completely optional
  QRadioButtonRichtTextSupport* rbrt = new QRadioButtonRichtTextSupport("<b>Rich text</b><sup>abc123</sup>", this);
  this->layout.addWidget(rbrt);
}

#include <QApplication>
#include <QRadioButton>
#include <QButtonGroup>
#include <QGroupBox>
#include <QHBoxLayout>
#include <QLabel>
#include <QMainWindow>
#include <QVBoxLayout>

int main(int argc, char **argv)
{
  QApplication app(argc, argv);
  QMainWindow win;
  QGroupBox box;
  QVBoxLayout vBox;
  // radio button with mark-up
  QRadioButton qTgl1(QString::fromLatin1("Radio<sub>1</sub>"));
  vBox.addWidget(&qTgl1);
  // radio button exploiting Unicode extensively
  QRadioButton qTgl2(QString::fromUtf8("Radio\342\202\202"));
  // '2' as subscript ... U+2082 -> \342\202\202
  vBox.addWidget(&qTgl2);
  // fake a radio button with rich text by composition of widgets
  QHBoxLayout hBox3;
  QRadioButton qTgl3;
  hBox3.addWidget(&qTgl3);
  QLabel qLbl3(QString::fromLatin1("Radio<sub>3</sub>"));
  qLbl3.setTextFormat(Qt::RichText);
  hBox3.addWidget(&qLbl3);
  vBox.addLayout(&hBox3);
  box.setLayout(&vBox);
  win.setCentralWidget(&box);
  win.show();
  return app.exec();
}