Solved filterAcceptsColumn work wrong in QSortFilterProxyModel

[zloi_templar]

Hello, i have some trouble with filter
I have 25 columns, need to hide some columns by filter

bool ProxyModelSM::filterAcceptsColumn(int source_column, const QModelIndex &source_parent) const
{
    if(uncheckedColumns.contains(source_column))
    {
        qDebug()<<sourceModel()->headerData(source_column, Qt::Horizontal);
        return false;
    }
    return true;
}

where uncheckedColumns - list with hided columns (it's numbers in table)
But filter always hide last columns
If i send to filter next list (3,7), it's hide 24,25 columns (2 last).
qDebug print correct header name, but hide last columns
What i did wrong?

[VRonin]

just delete ProxyModelSM::headerData completely. The default implementation already does what you want

[Christian Ehrlicher]

@zloi_templar said in filterAcceptsColumn work wrong in QSortFilterProxyModel:

uncheckedColumns

Are you sure you container contains the source columns and not the proxy columns? I would guess not. Please show use how you fill this container.

[VRonin]

Can't reproduce.

Could you test this minimal example?

#include <QApplication>
#include <QStandardItemModel>
#include <QSortFilterProxyModel>
#include <QTableView>

class CustomProxy : public QSortFilterProxyModel{
    Q_DISABLE_COPY(CustomProxy)
public:
    using QSortFilterProxyModel::QSortFilterProxyModel;
    const QVector<int>& uncheckedColumns() const{return m_uncheckedColumns;}
    void setUncheckedColumns(const QVector<int> &uncheckedColumns){m_uncheckedColumns = uncheckedColumns;}
protected:
    bool filterAcceptsColumn(int source_column, const QModelIndex &source_parent) const override{
        if(source_parent.isValid())
            return true;
        return !m_uncheckedColumns.contains(source_column);
    }
private:
    QVector<int> m_uncheckedColumns;
};

int main(int argc, char *argv[])
{
    QApplication app(argc,argv);
    QTableView view;
    QAbstractItemModel* srcModel = new QStandardItemModel(&view);
    srcModel->insertRows(0,100);
    srcModel->insertColumns(0,25);
    for(int i=0;i<srcModel->rowCount();++i){
        for(int j=0;j<srcModel->columnCount();++j){
            srcModel->setData(srcModel->index(i,j),QStringLiteral("%1,%2").arg(i).arg(j));
        }
    }
    CustomProxy* proxyModel = new CustomProxy(&view);
    proxyModel->setSourceModel(srcModel);
    proxyModel->setUncheckedColumns({3,7});
    view.setModel(proxyModel);
    view.show();
    return app.exec();
}

[zloi_templar]

@VRonin, @Christian-Ehrlicher sorry, my bad.
I tested again and saw, that programm works, it's hide correct data column, but draw old header, because i write it manually:

tbSC = new tableSM(this);
proxySM = new ProxyModelSM(tbSC);
mdlSC = new modelSM(proxySM);

QVariant modelSM::headerData(int section, Qt::Orientation orientation, int role) const
{
    if(role!= Qt::DisplayRole)
        return QVariant();

    if (orientation == Qt::Horizontal)
    {
        switch (section)
        {
            case 0:
                return tr("ID");
            case 1:
                return tr("Date");
            case 2:
                return tr("Status");
            case 3:
                return tr("Street");
            case 4:
                return tr("Home");
            case 5:
                return tr("Room");
            case 6:
                return tr("People");
            case 7:
                return tr("Animals");
etc

QVariant ProxyModelSM::headerData(int section, Qt::Orientation orientation, int role) const
 {
       return sourceModel()->headerData(section, orientation, role);
 };

how can i fix it?

P.S. Fix it

QVariant ProxyModelSM::headerData(int section, Qt::Orientation orientation, int role) const
    {
        if(orientation==Qt::Horizontal)
            return sourceModel()->headerData(mapToSource(index(0, section)).column(), orientation, role);
        else
            return sourceModel()->headerData(section, orientation, role);
    };

[VRonin]

just delete ProxyModelSM::headerData completely. The default implementation already does what you want

[zloi_templar]

@VRonin
wow, it's really work. Thank you