c++ - 调用基类实现

Question

我能够通过子类化 QTableWidget 来模拟 Right-Click 事件:

头文件:

#ifndef QRIGHCLICKTABLE_H
#define QRIGHCLICKTABLE_H

#include <QTableWidget>
#include <QMouseEvent>

class QRightClickTable : public QTableWidget
{
    Q_OBJECT

public:
    explicit QRightClickTable(QWidget *parent = 0);

private slots:
    void mousePressEvent(QMouseEvent *e);

signals:
    void rightClicked();

public slots:

};

#endif // QRIGHCLICKTABLE_H

cpp文件

QRightClickTable::QRightClickTable(QWidget *parent) :
    QPushButton(parent)
{
}

void QRightClickTable::mousePressEvent(QMouseEvent *e)
{
    if(e->button()==Qt::RightButton)
        emit rightClicked();
}

QRightClickTable *button = new QRightClickTable(this);
ui->gridLayout->addWidget(button);
connect(button, SIGNAL(rightClicked()), this, SLOT(onRightClicked()));


void MainWindow::onRightClicked()
{
    qDebug() << "User right clicked me";
}

现在，右键单击可以正常工作，但 QTableWidget 还存在其他问题:所有其他鼠标事件，例如左键单击以选择单元格，不再起作用。 你能帮助我吗？我知道我需要在我的 mousePressEvent 覆盖中调用基类实现，你可以用一小段代码告诉我如何做？

Answer 1

像这样更改您的事件处理程序:

void QRightClickTable::mousePressEvent(QMouseEvent *e) {
    if(e->button()==Qt::RightButton) {
        emit rightClicked();
    } else {
        QTableWidget::mousePressEvent(e);
    }
}