View using multiple models

[NoRulez]

Hello,

i've the same problem, i need to merge 2 tree models into one treeview.
The first model is a simple QStandardItemModel. The second model is a QDirModel.
Now i want to display both models into one treeview. So from the posting i think i need an overlay...

CustomModel Items
     Custom Item 1 (QStandardItemModel)
          Custom SubItem 1 (QStandardItemModel)
          Custom SubItem 2 (QStandardItemModel)
     Custom Item 2 (QStandardItemModel)
          Custom SubItem 1 (QStandardItemModel)
          Custom SubItem 2 (QStandardItemModel)
DirModel Items
     C: (QDirModel)
          Qt (QDirModel)
               2010.05 (QDirModel)

CustomModel Items
     Custom Item 1 (QStandardItemModel)
          Custom SubItem 1 (QStandardItemModel)
          Custom SubItem 2 (QStandardItemModel)
     Custom Item 2 (QStandardItemModel)
          Custom SubItem 1 (QStandardItemModel)
          Custom SubItem 2 (QStandardItemModel)
DirModel Items
     C: (QDirModel)
          Qt (QDirModel)
               2010.05 (QDirModel)

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So, i think i need two functions setCustomModel(QAbstractItemModel *pModel); and a function setDirModel(QAbstractItemModel *pModel); for example.
But how can i handle it that when i click on an item in the QDirModel to display a file content and if i click on an item in the QStandardItemModel to display for example the a string? To simplify this, i want to know how the treeview knows which model must be accessed.

I've also attached a screenshot of the current situation. In the left (empty) TreeView i will merge the right ones.

Thanks in advance

Best Regards
NoRulez