创建自定义QHeaderView

#pragma once#include <QObject>
#include <QHeaderView>
#include <QPainter>
#include <QMouseEvent>class SSHeaderView  : public QHeaderView
{Q_OBJECTprivate:bool isChecked;int m_checkColIdx;
public:SSHeaderView(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, 3, 21, 21);if (isChecked)option.state = QStyle::State_On;elseoption.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：

SSHeaderView *m_checkHeader = new SSHeaderView(0, Qt::Horizontal, qtableWidget);
qtableWidget->setHorizontalHeader(m_checkHeader);   
connect(m_checkHeader, &SSHeaderView::checkStausChange, [=](bool check) {qDebug() << "is:" << check;});

最终效果：