QTableWidget的使用案例

创建QTableWidget

	m_table_widget = new QTableWidget(this);
    m_table_widget->setObjectName("TableWidget");
    m_table_widget->setShowGrid(false);
    m_table_widget->setSortingEnabled(true);
    m_table_widget->setEditTriggers(QAbstractItemView::EditTrigger::NoEditTriggers);
    m_table_widget->setContextMenuPolicy(Qt::ContextMenuPolicy::CustomContextMenu);
    m_table_widget->setSelectionBehavior(QAbstractItemView::SelectionBehavior::SelectRows);
    m_table_widget->setColumnCount(5);
    m_table_widget->setHorizontalHeaderLabels({TU(""), TU("文件名称"), TU("日期"), TU("类型"), TU("大小")});
    m_table_widget->verticalHeader()->setVisible(false);
    m_table_widget->horizontalHeader()->resizeSection(0, 50);
    m_table_widget->horizontalHeader()->resizeSection(2, 140);
    m_table_widget->horizontalHeader()->resizeSection(3, 100);
    m_table_widget->horizontalHeader()->resizeSection(4, 100);
    m_table_widget->horizontalHeader()->setSectionResizeMode(QHeaderView::ResizeMode::Fixed);
    m_table_widget->horizontalHeader()->setSectionResizeMode(1, QHeaderView::ResizeMode::Stretch);
    m_table_widget->verticalScrollBar()->setContextMenuPolicy(Qt::ContextMenuPolicy::NoContextMenu);
    m_table_widget->horizontalScrollBar()->setContextMenuPolicy(Qt::ContextMenuPolicy::NoContextMenu);

    connect(m_table_widget, &QTableWidget::itemSelectionChanged, this, &Widget::itemSelectionChanged);
    connect(m_table_widget, &QTableWidget::itemClicked, this, &Widget::itemClicked);

添加数据

    for(int row = 0; row < 10; ++row)
    {
        m_table_widget->insertRow(m_table_widget->rowCount());

        auto item = new QTableWidgetItem();
        item->setIcon(QIcon("D:\\wsl.ico"));
        item->setCheckState(Qt::CheckState::Unchecked);
        m_table_widget->setItem(row, 0, item);
        m_table_widget->setItem(row, 1, new QTableWidgetItem(QString("filename_xxxxx_%1").arg(row)));
        m_table_widget->setItem(row, 2, new QTableWidgetItem("2024/01/01 10:00:00"));
        m_table_widget->setItem(row, 3, new QTableWidgetItem("xxxxx.txt"));
        m_table_widget->setItem(row, 4, new QTableWidgetItem("124000KB"));
    }

清空数据

    while(m_table_widget->rowCount() > 0)
    {
        m_table_widget->removeRow(m_table_widget->rowCount() - 1);
    }

处理选择

在选择了行时，设置复选框的选中状态。

void Widget::itemSelectionChanged()
{
    for(int row = 0; row < m_table_widget->rowCount(); ++row)
    {
        auto item = m_table_widget->item(row, 0);
        if (item->isSelected())
        {
            item->setCheckState(Qt::CheckState::Checked);
        }
        else
        {
            item->setCheckState(Qt::CheckState::Unchecked);
        }
    }
}

处理单击

点击复选框后，设置行的选中状态。

    if (0 == item->column())
    {
        if (Qt::CheckState::Checked == item->checkState())
        {
            m_table_widget->selectRow(item->row());
        }
        else if (Qt::CheckState::Unchecked == item->checkState())
        {
            for(int col = 0; col < m_table_widget->columnCount(); ++col)
            {
                m_table_widget->item(item->row(), col)->setSelected(false);
            }
        }
    }