QPlainTextEdit: TextInteractionFlag not applied

#include <QApplication>
#include <QPlainTextEdit>

int main(int argc, char ** argv)
{
	QApplication app( argc, argv );
	QPlainTextEdit p;
	p.setPlainText("any text");
	p.setTextInteractionFlags(Qt::TextEditable);
	p.show();
	return app.exec();
}