制作可关闭的QPushButton的更好方法是什么？

Question

这就像QTabBar中的可关闭选项卡。

就绪:::::::::::::::::::::

BtnWithClosing::BtnWithClosing(QString txt, QWidget *parent):
QPushButton(txt, parent) {
  QHBoxLayout *layout = new QHBoxLayout;
  layout->setMargin(4);
  layout->setSpacing(0);
  layout->setSizeConstraint(QLayout::SetMaximumSize);
  setText(text() + "    "); // for close button space
  QPushButton *btnClose = new QPushButton;
  btnClose->setStyleSheet("QPushButton:hover {image:"
    "url(:/images/closebtnover.png);}"
    "QPushButton {image: url(:/images/closebtn.png); margin-right: -9;"
    "margin-left: -6; min-width: 0; background-color: transparent;"
    "min-height: 0; border-width: 0px; border-radius: 9px; padding: 0px;}");
  layout->addWidget(btnClose, 0, Qt::AlignRight);
  setLayout(layout);
}