[Qt-interest] MVC Questions and Syncing QTreeView and

[Gururaj Deshpande]

 Hello

Did you try using the
setSelectionModel(QItemSelectionModel*) method ?

e.g  tableView->setSelectionModel(treeView->selectionModel())

This will set the selection in Tree view to tableView as well.

-Dheerendra


> Message: 5
> Date: Tue, 11 Jan 2011 16:19:48 +0000 (UTC)
> From: lbutler3 at comcast.net
> Subject: [Qt-interest] MVC Questions and Syncing QTreeView and
>        QTableView
> To: qt-interest at qt.nokia.com
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> I've got some questions about how to keep multiple views of the same data
> in sync.
>
> I'm building an application to organize 3D models and manipulate meta-data.
> Think about grouping objects together into collections (and collections of
> collections) as well as setting attributes (like color) of the leaf items.
>
> The heirarchy is displayed and edited using a QTreeView which has a data
> model class derived from QAbstractItemModel to give it access to data to
> display. I need to display a table of "parts" (the leaves of the heirarcy)
> and their associated properties (eg. color) for users to edit. I can create
> a table model derived from QAbstractItemModel.
>
> The question is how to keep these two data models in sync. They both have
> selection models that need to be kept in sync. Contrary to the tutorials and
> examples I've seen, neither datamodel seems appropriate to "own" the
> underlying data. They just provide an interface for the Q*Views. For
> example, the rendering pipeline needs access to the application-native
> representation of the data for drawing the 3D display. So how do we map
> QModelIndex items from one view to another? How do we keep selection models
> in sync? And most crucially: Where does this processing take place? I accept
> that the classes derived from QAbstractItemModel are a part of the "data
> model" (M from Model-View-Controller). Does the controller take the
> responsibility of reaching down into both models to manipulate their
> selections? I guess I can see this when doing operations like cut-paste, but
> for selection I was hoping there might be a cleaner way.
>
> Your counsel would be greatly appreciated.
>
> Lee
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