创建自定义QHeaderView

#pragma once

#include <QObject>
#include <QHeaderView>
#include <QPainter>
#include <QMouseEvent>

class SSHeaderView  : public QHeaderView
{
	Q_OBJECT

private:
	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;
			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：

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：