lea:~% cat test.qml                                                                                                                                                                                                                                                                                               (git)-[master]  (W15 - 04/15@18:49:22 CEST)
import QtQuick 2.0

Item {
    property int myFoo: 5
    property int second: myFoo
    onSecondChanged: console.log("second: " + second)
}
zsh: exit 0
lea:~% ~/code/qt/qtbase/bin/qmlscene test.qml                                                                                                                                                                                                                                                                     (git)-[master]  (W15 - 04/15@18:49:52 CEST)
qml: second: 5
zsh: exit 0