[Qt-qml] Disable an item in QAbstractListModel so it doesn't show up in a ListView

[Pritam Ghanghas]

On Wed, 2011-06-22 at 22:32 +0530, Matt Barclay wrote:
> Hello,
> 
> 
> I have a C++ model derived from QAbstractListModel.  I want to disable
> certain elements of the model so they don't get a delegate in the
> ListView.  i.e. I want them hidden from the listview.  These elements
> can also be enabled under certain conditions.  Think if it like an
> inventory system where the item is not displayed with quantity equals
> 0, but as soon as quanity > 0 the item reappears in the ListView.
> 
> I tried using overriding QAbstractListModel::flags(index) and
> returning QAbstractListModel::flags(index) & ~Qt::ItemIsEnabled;  But
> that isn't the same thing as removing the item from the view.
> 
> 
> Is this possible?  I really want to avoid removing the item from the
> model, since visibility is a property of the item.
> 

Reimpliment this function 
QVariant QAbstractItemModel::data ( const QModelIndex & index, int role
= Qt::DisplayRole ) const
if you haven't done so yet, and return an invalid variant when you don't
want the item to appear in your view.

--
Pritam

> 
> Thanks,
> Matt
> 
> 


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