#include <QDebug>
#include <QCoreApplication>

class MyObject : public QObject
{
public:
    MyObject() {
        qDebug() << "CTOR" << this;
    }

    ~MyObject() {
        qDebug() << "DTOR" << this;
    }

    bool event(QEvent *ev) override
    {
        if (ev->type() == QEvent::User) {
            qDebug() << "Got a user event, will deleteLater()";
            deleteLater();
        }

        return QObject::event(ev);
    }
};

int main(int a, char **b)
{
    QCoreApplication app(a, b);

    auto obj = new MyObject();

    QEvent ev(QEvent::User);
    QCoreApplication::sendEvent(obj, &ev);

    return app.exec();
}

// Output:

$ CTOR QObject(0x56427a6211b0)
$ Got a user event, will deleteLater()