当鼠标悬停在qt中的按钮上时更改图标

#include <QtWidgets>

class HoverButton : public QPushButton
{
public:
    HoverButton(QWidget *parent = nullptr) : QPushButton(parent) {}
    
protected:
    bool event(QEvent *event) override
    {
        if (event->type() == QEvent::Enter)
        {
            // 鼠标进入按钮，设置悬停时的图标
            setIcon(QIcon(":/icons/hover_icon.png"));
        }
        else if (event->type() == QEvent::Leave)
        {
            // 鼠标离开按钮，恢复默认图标
            setIcon(QIcon(":/icons/default_icon.png"));
        }
        
        return QPushButton::event(event);
    }
};

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

    QWidget window;
    QVBoxLayout layout;
    HoverButton button("Button");
    button.setIcon(QIcon(":/icons/default_icon.png"));
    layout.addWidget(&button);
    window.setLayout(&layout);
    window.show();

    return app.exec();
}