#include <QApplication>
#include <QWidget>
#include <QShowEvent>
#include <QHideEvent>
#include <iostream>

class MyWidget : public QWidget
{
public:
    using QWidget::QWidget;

protected:
    void showEvent(QShowEvent* event) override
    {
        std::cout << "show" << std::endl;
        QWidget::showEvent(event);
    }

    void hideEvent(QHideEvent* event) override
    {
        std::cout << "hide" << std::endl;
        QWidget::hideEvent(event);
    }
};

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    MyWidget widget;
    widget.show();

    return app.exec();
}