Qt QHeaderView 表头添加复选框

参考资料 ： https://wiki.qt.io/Technical_FAQ#How_can_I_insert_a_checkbox_into_the_header_of_my_view.3F

http://blog.csdn.net/liang19890820/article/details/50772562

先重写自定义自己的QheaderView类

#include <QtGui>
class MyCheckboxHeader : public QHeaderView
{
	Q_OBJECT
public:
	MyCheckboxHeader(Qt::Orientation orientation, QWidget * parent = 0) : QHeaderView(orientation, parent), isOn(false)
	{}
	void cancelSelectAll()
	{
		isOn = false;
		emit signalStateTrange(isOn);
		this->update();
	}
signals:
	void signalStateTrange(int);
protected:
	void paintSection(QPainter *painter, const QRect &rect, int logicalIndex) const
	{
		painter->save();
		QHeaderView::paintSection(painter, rect, logicalIndex);
		painter->restore();
		if (logicalIndex == 0)
		{
			QStyleOptionButton option;
			option.rect = QRect(10, 10, 10, 10);
			if (isOn)
				option.state = QStyle::State_On;
			else
				option.state = QStyle::State_Off;
			QCheckBox checkBox;
			option.iconSize = QSize(20, 20);
			option.rect = rect;
			

			style()->drawPrimitive(QStyle::PE_IndicatorCheckBox, &option, painter, &checkBox);
			//this->style()->drawPrimitive(QStyle::PE_IndicatorCheckBox, &option, painter);
		}

	}
	void mousePressEvent(QMouseEvent *event)
	{
		
		if (event->button() == Qt::LeftButton) {
			int index = logicalIndexAt(event->pos());
			if (index == 0)
			{
				if (isOn)
					isOn = false;
				else
					isOn = true;
			}
			emit signalStateTrange(isOn);
		}
			
		this->update();
		QHeaderView::mousePressEvent(event);
	}
private:
	bool isOn;
};

int main(int argc, char **argv)//QTableWidget 实现此种表
{
  QApplication app(argc, argv);
  QTableWidget table;
  table.setRowCount(4);
  table.setColumnCount(3);
MyCheckboxHeader *myHeader = new MyCheckboxHeader(Qt::Horizontal, &table);
  table.setHorizontalHeader(myHeader);  
  table.show();}

//笔者用的是QTableview（model+view）模型数据形式的表 表头列已经在model类的headerdata函数定义无需改动 如下调用即可

QTableView *m_logTable = new QTableView();
	MyCheckboxHeader *myHeader = new MyCheckboxHeader(Qt::Horizontal, m_logTable);m_logTable->resizeColumnsToContents();m_logTable->setHorizontalHeader(myHeader);m_logTable->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);//connect(myHeader, SIGNAL(signalStateTrange(int)), this, SLOT(slotsSelectAll(int))); checkbox触发信号槽

效果：