Issue with ProxyModel with tableview and VerticalHeader

[alizadeh91]

Hi,
Suppose using ProxyModel/Model/View.In tableView whenever the filtering occurs the numbering column(vertical Header) of tableview will filter too.
I want to have sequence of proxymodel rows in numberingColumn(vertical header) instead of sourceModel when filtering occurs. see this:
Unti121tled.png

I've shown with red rectangle
How can i do that?

[Santosh Reddy]

Re-Implement QAbstractItemModel::headerData() in the proxy model, and make use of signal QAbstractItemModel::headerDataChanged(), when ever filtering / sorting is applied.

[alizadeh91]

Thanks Reddy for reply,
What's the deal with headerData() ? I've thought that it must be setHeaderData??!!!
Anyway, how can i do that in headerData method?

[Santosh Reddy]

A trivial implementation will look like

class SortFilterProxyModel : public QSortFilterProxyModel
{
    Q_OBJECT
public:
    explicit SortFilterProxyModel(QObject * parent = 0)
        : QSortFilterProxyModel(parent)
    {
        ;
    }
 
    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const
    {
        if((orientation == Qt::Vertical) and
           (role == Qt::DisplayRole)       )
            return section + 1;
 
        return sourceModel()->headerData(section, orientation, role); //<<<<<< TODO: Make sure sourceModel() is valid
    }
};

class SortFilterProxyModel : public QSortFilterProxyModel
{
    Q_OBJECT
public:
    explicit SortFilterProxyModel(QObject * parent = 0)
        : QSortFilterProxyModel(parent)
    {
        ;
    }

    QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const
    {
        if((orientation == Qt::Vertical) and
           (role == Qt::DisplayRole)       )
            return section + 1;

        return sourceModel()->headerData(section, orientation, role); //<<<<<< TODO: Make sure sourceModel() is valid
    }
};

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[alizadeh91]

Thanks, but i've already tired that! I think the default implementation of Qt is set to return section!

[Santosh Reddy]

Thanks, but i've already tired that!

Does that mean your problem is solved?

I think the default implementation of Qt is set to return section!

No, the default implementation of QSortFilterProxyModel::headerData() will return the section number from the source model. If you need to have continuous numbers even after applying filters, then you need to re-implement it.

[alizadeh91]

Thanks It works