Qt 表格中插入QCheckBox并居中

    QWidget *widget = new QWidget;    QHBoxLayout *layout = new QHBoxLayout;    QCheckBox *box = new QCheckBox;    layout->addWidget(box);    layout->setMargin(0);    layout->setAlignment(box,Qt::AlignCenter);    widget->setLayout(layout);    tblList->setCellWidget(0,0,widget);