QTableWidget只显示横线&表头显示复选框&放自定义widget

1.效果图：

2.如何实现只显示横线

需要分别设置表头QHeaderView和QTableWidgetItem

/* --- 去除item边框 + item显示下边框 --*/
QTableWidget#tbw_projects::item{
   padding-left: 0px;
   border: 0px;
   border-bottom: 1px solid #E5E6EB;
}

/* -- 去除HeaderView::section边框 --*/
QTableWidget#tbw_projects QHeaderView::section:horizontal{
   padding-left: 0px;
   border: 0px;
   border-bottom: 1px solid #E5E6EB;
   height: 35px;
}

3.如何在表头显示复选框

//继承QHeaderView重写相关函数
class SCheckBoxHeaderView : public QHeaderView
{
    Q_OBJECT
private:
    bool isChecked;
    int m_checkColIdx;

public:
    SCheckBoxHeaderView(int checkColumnIndex, Qt::Orientation orientation,
                        QWidget *parent = 0)
        : QHeaderView(orientation, parent)
    {
        m_checkColIdx = checkColumnIndex;
        isChecked = false;
    }
signals:
    void checkStausChange(bool);

protected:
    void paintSection(QPainter *painter, const QRect &rect,
                      int logicalIndex) const
    {
        painter->save();
        QHeaderView::paintSection(painter, rect, logicalIndex);
        painter->restore();
        if (logicalIndex == m_checkColIdx) {
            QStyleOptionButton option;
            int width = 10;
            for (int i = 0; i < logicalIndex; ++i)
                width += sectionSize(i);
            option.rect = QRect(3, 5, 21, 21);
            if (isChecked)
                option.state = QStyle::State_On;
            else
                option.state = QStyle::State_Off;
            this->style()->drawControl(QStyle::CE_CheckBox, &option, painter);
        }
    }
    void mousePressEvent(QMouseEvent *event)
    {
        if (visualIndexAt(event->pos().x()) == m_checkColIdx) {
            isChecked = !isChecked;
            this->updateSection(m_checkColIdx);
            emit checkStausChange(isChecked);
        }
        QHeaderView::mousePressEvent(event);
    }
};

//使用
void ProjectTable::setHeader()
{
    auto header_view = new SCheckBoxHeaderView(0, Qt::Horizontal, table_);
    table_->setHorizontalHeader(header_view);
    connect(header_view, &SCheckBoxHeaderView::checkStausChange,
            [=](bool checked) {
                for (int i = 0; i < projects_.size(); i++) {
                    Project_Data &pdata = projects_[i];
                    pdata.first = checked;
                }
                reDraw(projects_);
                emit signal_update_projects(projects_);
                emit signal_selected_project("");
            });
}

4. 如何放入自定义Widget并且随着窗口大小变化自适应

比如我的表格有4列，最后两列都是自定义widget

• 将需要的东西放入一个widget中，设置布局，然后调用setCeilWidget
• 不设置自定义widget中控件尺寸【比如按钮】
• 设置tablewidget每列的大小策略
• 在重绘表格 / resizeEvent函数里重设每列大小策略

//将自定义widget放入table中
void reDraw()
{
         // 上移/下移按钮
        QWidget *move_widget = new QWidget;
        QPushButton *btn_up = new QPushButton("");
        QPushButton *btn_down = new QPushButton("");
        btn_up->setObjectName("pbn_up");
        btn_down->setObjectName("pbn_down");
        QHBoxLayout *layout2 = new QHBoxLayout(move_widget);
        layout2->addWidget(btn_up);
        layout2->addWidget(btn_down);
        layout2->setSpacing(3);
        layout2->setContentsMargins(2, 0, 2, 0);
        table_->setCellWidget(row, 3, move_widget);
}

//table每列的策略
void resizeCol()
{
    if (table_->columnCount() != 4) {
        table_->setColumnCount(4);
    }
    QStringList headers = {
        tr(""),
        tr("Project"),
        tr("Operation"),
        tr("Order"),
    };
    table_->setHorizontalHeaderLabels(headers);
    table_->horizontalHeader()->setSectionResizeMode(0, QHeaderView::Fixed);
    table_->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);
    table_->horizontalHeader()->setSectionResizeMode(2, QHeaderView::Fixed);
    table_->horizontalHeader()->setSectionResizeMode(3, QHeaderView::Fixed);
    table_->setColumnWidth(0, 60);  // 启用
    table_->setColumnWidth(2, 110); // 编辑/删除
    table_->setColumnWidth(3, 80);  // 上下移动
    table_->setMinimumWidth(60 + 110 + 80 + 100);
}

//resizeEvent
void resizeEvent(QResizeEvent *event)
{
    resizeCol();
    QWidget::resizeEvent(event);
}