#include <QtGui/QFont>
#include <QtWidgets/QApplication>
#include <QtWidgets/QTextEdit>

int main(int argc, char **argv) {
  QApplication app(argc, argv);
  QTextEdit edit;
  edit.setHtml("foo <span style=\"color: red;\">red</span> <span style=\"color: green;\">green</span> <span style=\"color: blue;\">blue</span><br>"
               "<span style=\"background-color: black;\"><span style=\"color: white;\">foo</span> <span style=\"color: red;\">red</span> <span style=\"color: green;\">green</span> <span style=\"color: blue;\">blue</span></span><br>"
               "<span style=\"background-color: red;\"><span style=\"color: green;\">green</span> <span style=\"color: blue;\">blue</span></span><br>"
               "<span style=\"background-color: green;\"><span style=\"color: red;\">red</span> <span style=\"color: blue;\">blue</span></span><br>"
               "<span style=\"background-color: blue;\"><span style=\"color: red;\">red</span> <span style=\"color: green;\">green</span></span>");

  edit.setFont(QFont("monospace", 16));
  QFontMetrics metrics = edit.fontMetrics();
  edit.setCursorWidth(metrics.width(' '));
  edit.show();

  return app.exec();
}