如何在Qt中制作可嵌套可扩展的widget

#include <QtWidgets>

class MyWidget : public QWidget
{
public:
    MyWidget(QWidget *parent = nullptr)
        : QWidget(parent)
    {
        QVBoxLayout *layout = new QVBoxLayout(this);
        
        QLabel *label = new QLabel("Hello, World!", this);
        layout->addWidget(label);
        
        QPushButton *button = new QPushButton("Click me", this);
        layout->addWidget(button);
        
        connect(button, &QPushButton::clicked, this, &MyWidget::onButtonClicked);
    }
    
private slots:
    void onButtonClicked()
    {
        // 处理按钮点击事件
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    
    QWidget parentWidget;
    
    MyWidget *nestedWidget = new MyWidget(&parentWidget);
    
    QVBoxLayout *parentLayout = new QVBoxLayout(&parentWidget);
    parentLayout->addWidget(nestedWidget);
    
    parentWidget.show();
    
    return app.exec();
}