Tree model - Proxy model that wrapped original model under a single parent node

i am trying to create a proxy model using a read-only model that will have all the item in the R/O model under a single tree parent node. What function do I need to overwrite to make this happened? Do I derived from QAbstractItemModel or QAbstractProxyModel?

Example:
Original model
* A
** x y
* B
* C
** x y

Proxy Model (what I want)
* Name-String
** A
*** x y
** B
** C
*** x y

Quote:

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i am trying to create a proxy model using a read-only model that will have all the item in the R/O model under a single tree parent node......Do I derived from QAbstractItemModel or QAbstractProxyModel?

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As you want to implement proxy model you should derive from QAbstractProxyModel

Quote:

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What function do I need to overwrite to make this happened?

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Implement mapFromSource(), mapToSource(), columnCount(), rowCount(), index(), parent(), and data()