• QStandardItemModel + QStandardItem
  • QListWidget + QListWidgetItem
  • Model/View + QItemDelegate
  • 当然,还有其它更好的方式,这里就不再过多介绍了,下面介绍一种比较简单的:
    QListWidget + QListWidgetItem + QCheckBox
        pListWidget = new QListWidget(this);
            pLineEdit = new QLineEdit(this);
            for (int i = 0; i < 5; ++i)
            QListWidgetItem *pItem = new QListWidgetItem(pListWidget);
            pListWidget->addItem(pItem);
            pItem->setData(Qt::UserRole, i);
            QCheckBox *pCheckBox = new QCheckBox(this);
            pCheckBox->setText(QStringLiteral("Qter%1").arg(i));
            pListWidget->addItem(pItem);
            pListWidget->setItemWidget(pItem, pCheckBox);
            connect(pCheckBox, SIGNAL(stateChanged(int)), this, SLOT(stateChanged(int)));
            ui.comboBox->setModel(pListWidget->model());
            ui.comboBox->setView(pListWidget);
            ui.comboBox->setLineEdit(pLineEdit);
            pLineEdit->setReadOnly(true);                                                                                                                    //ui.comboBox->setEditable(true);
            connect(pLineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(textChanged(const QString &)));
    void MultiComboBox::stateChanged(int state)
            bSelected = true;
            QString strSelectedData("");
            strSelectedText.clear();
        QObject *object = QObject::sender();
        QCheckBox *pSenderCheckBox = static_cast(object);
        int nCount = pListWidget->count();
        for (int i = 0; i < nCount; ++i)
            QListWidgetItem *pItem = pListWidget->item(i);
            QWidget *pWidget = pListWidget->itemWidget(pItem);
                    QCheckBox *pCheckBox = (QCheckBox *)pWidget;
                    if (pCheckBox->isChecked())
                            QString strText = pCheckBox->text();
                            strSelectedData.append(strText).append(";");
                    //所点击的复选框
            if (pSenderCheckBox == pCheckBox)
                            int nData = pItem->data(Qt::UserRole).toInt();
                qDebug() << QString("I am sender...id : %1").arg(nData);
        if (strSelectedData.endsWith(";"))
            strSelectedData.remove(strSelectedData.count() - 1, 1);
        if (!strSelectedData.isEmpty())
                    //ui.comboBox->setEditText(strSelectedData);
                    strSelectedText = strSelectedData;
            pLineEdit->setText(strSelectedData);
            pLineEdit->setToolTip(strSelectedData);
                    pLineEdit->clear();
                    //ui.comboBox->setEditText("");
            bSelected = false;
    
    void MultiComboBox::textChanged(const QString &text)
            if (!bSelected)
                    pLineEdit->setText(strSelectedText);
    
      当点击的复选框状态改变时候,会发送stateChanged信号,槽中通过sender来获取信号的发送者,然后可以获取所需要的数据(比如:可以通过setData保存一些自定义的数据),遍历所有的复选框,获取选中项的数据进行显示。
      中间遇到一个小问题,当点击空白处,下来列表会进行收回,此时QLineEdit的数据将会被自动清空,所以此处判断QLineEdit的textChanged来进行恢复。

    转载自:╰☆一去❤二三里`

    另外关于QCOmbobox的扩展,请点击:QCompleter自动补全Qt之QComboBox(基本应用、代理设置)