QLineEdit: setText will cause signal textEdited emitted when validator returns a different string

#include <QtGui>

class QUppercaseValidator : public QValidator
{
public:
	QUppercaseValidator(QObject *parent) : QValidator(parent) {}
	virtual State validate(QString &s, int &) const { fixup(s); return Acceptable; }
	virtual void fixup(QString &s) const { s = s.toUpper(); }
};

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

	QWidget w;
	QLineEdit *edit1 = new QLineEdit;
	QLineEdit *edit2 = new QLineEdit;
	QLabel *label = new QLabel;
	edit2->setValidator(new QUppercaseValidator(edit2));
	QObject::connect(edit1, SIGNAL(textChanged(QString)), edit2, SLOT(setText(QString)));
	QObject::connect(edit2, SIGNAL(textEdited(QString)), label, SLOT(setText(QString)));
	QVBoxLayout *layout = new QVBoxLayout;
	layout->addWidget(edit1);
	layout->addWidget(edit2);
	layout->addWidget(label);
	w.setLayout(layout);

	w.show();

    return a.exec();
}