Signal sigKeyRelease is emitted whenever the underlying widget receives a QKeyEvent of type QEvent::KeyRelease because a key was released on the keyboard. The first argument is a string representing the text associated with the key. The second argument is the key name. The third argument is a string containing the [[http://doc.trolltech.com/main-snapshot/qt.html#KeyboardModifier-enum][keyboard modifier names] separated by a vertical bar.