[Qt-interest] dataChanged() SIGNAL in proxy models

[Mandeep Sandhu]

On Thu, Jul 1, 2010 at 2:16 PM, Tony Rietwyk
<tony.rietwyk at rightsoft.com.au> wrote:
> Hi Mandeep,
>
> I haven't used proxy models, but I'm surprised that the dataChanged signal
> isn't mapped for you.  Connecting the source signal to the proxy's signal
> won't work, since the source index parameter refers to the source model,
> which the table view won't recognise.  When you connected to a slot, did you
> map the source index to the proxy's rows & columns?

Oops! I forgot...I should've called mapFromSource() in the slot....

<snip>
void setSourceModel(QAbstractItemModel *sourceModel)
{
    QAbstractProxyModel::setSourceModel(sourceModel);
    connect(sourceModel, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
            this, SLOT(dataChangeSlot(QModelIndex,QModelIndex)));
}

public slots:
    void dataChangeSlot(const QModelIndex &topLeft, const QModelIndex
&bottomRight)
    {
        emit dataChanged(mapFromSource(topLeft), mapFromSource(bottomRight));
    }

signals:
    void dataChanged(const QModelIndex &, const QModelIndex &);
</snip>


This works. Though I was hoping that this should be handled by the
abstract proxy model since there nothing subclass implementation
specific being done here (I haven't checked the source of
QAbstractProxyModel yet).

>
> Hope that helps,

It did. Thanks! :)

Regards,
-mandeep

>
> Tony