在QTableWidget中添加QCheckBox并使其居中显示(转)

实现思路：把QCheckBox嵌入式到一个水平布局中

QWidget *widget;
QHBoxLayout *hLayout;
QCheckBox *ckb;
...
ckb = new QCheckBox();
hLayout = new QHBoxLayout();
widget = new QWidget(ui->tableWidget);
hLayout->addWidget(ckb);
hLayout->setMargin(0);                          // 必须添加, 否则CheckBox不能正常显示
hLayout->setAlignment(ckb, Qt::AlignCenter);
widget->setLayout(hLayout);
...
ui->tableWidget->setCellWidget(row, column, widget);

获取CheckBox的指针的方法

QWidget *widget = (QWidget *)ui->tableWidget->cellWidget(row, column);
QCheckBox *ckb = (QCheckBox *)widget->children().at(1);
ckb->setChecked(true);
...

备注：
    可使用 qDebug() << widget->children(); 输出widget的child列表
    从而判断CheckBox的index

转自：http://blog.csdn.net/it_mac/article/details/8953191

-------------------------------------------------------------------------自学笔记-------------------------------------------------------------------------

　　　　 //开关按钮
        QWidget* widget = new QWidget();
        QToolButton* switchBtn = new QToolButton(widget);
        switchBtn->setFixedSize(QSize(nWidth, nHeight));
        switchBtn->setText("关");
        switchBtn->setStyleSheet(offStyle);
        QHBoxLayout* hLayout = new QHBoxLayout(widget);
        hLayout->setMargin(0);
        hLayout->addWidget(switchBtn);
        hLayout->setAlignment(switchBtn, Qt::AlignCenter);
        devTableWidget->setCellWidget(row, column, widget);
        connect(switchBtn, SIGNAL(clicked()), switchMapper, SLOT(slot_switchBtn()));

　　　　//获取按钮指针
　　　　QToolButton*toolBtn=(QToolButton*)devTableWidget->cellWidget(row,column)->children().at(0);