TreeView: on collapse only bindings in items below collapsed item are evaluated

TableViewColumn {
	title: "Test"
	width: 100
	delegate: Rectangle
	{
		function isParentOf(parent, child)
		{
			while(child.parent != "QModelIndex()")
			{
				if(parent === child.parent)
				{
					return true;
				}
				child = child.parent;
			}
			return false;
		}
		color: (styleData.selected || isParentOf(styleData.index, view.currentIndex)) ? "red" : "blue"
		//color: (view.currentIndex === styleData.index) ? Qt.rgba(Math.random(), Math.random(), Math.random(), 1.0) : Qt.rgba(Math.random(), Math.random(), Math.random(), 1.0)
		border.width: styleData.selected ? 2 : 0
	}
}