how can i sort depend on various "column" data when i re-implement operator< in QListWidgetItem ?

[opengpu2]

when i re-implement operator<, how can i sort depend on various "column" data , not only the DisplayRole data.
why i do this is i want have a QTreeWidget and a QListWidget, which have the Same contents.

1. i sort the QTreeWidget items by the data on a column.
2. when i switch into the QListWidget, i will sort by the same data with the QTreeWidget, sort the QListWidget....so i need more than sort by the DisplayRole