:when referring to enum property in a qml file QtCreator does not autocomplete QML enums

Considerating the code below. The QML file named  TextE.qml .The alignment1 refer to TextE.Fruit.Heading, but when I type "TextE.F" or "TextE.Fruit.H" the rest parts doesn't show up in the property list. So there is no aotucomletion at all.

import QtQuick
     Item {
        enum Fruit
        {
            Normal,
            Heading
        }
      property int  alignment1:  TextE.Fruit.Heading
      property int  alignment2:  TextE.Normal
    }