How to limit shown rows in list view?

[Subuday]

I can't figure out how to limit shown items in list view using filter model?

    filterModel->setSourceModel(&langListModel);
    filterModel->setFilterRole(langListModel.NameRole);
``

#include "langlistmodel.h"

LangListModel::LangListModel(QObject *parent):
QAbstractListModel(parent)
{

}

int LangListModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid()) {
return 0;
}

return listData.size();

}

QVariant LangListModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid()) {
return QVariant();
}

switch (role) {
case IDRole:
    return listData.at(index.row()).value("id");
case NameRole:
    return listData.at(index.row()).value("name");
default:
    return QVariant();
}

}

QHash<int, QByteArray> LangListModel::roleNames() const
{
QHash<int, QByteArray> roles = QAbstractListModel::roleNames();
roles[NameRole] = "name";
roles[IDRole] = "IDLang";

return roles;

}

void LangListModel::add(const QMap<QString, QString> &unit)
{
beginInsertRows(QModelIndex(), listData.size(), listData.size());
listData.append(unit);
endInsertRows();
}

int LangListModel::size() const
{
return listData.size();
}

void LangListModel::clear()
{
beginRemoveRows(QModelIndex(), 0, listData.size());
endRemoveRows();
listData.clear();
}

[JonB]

@Subuday

if (parent.isValid()) {
 return 0;
 }

You sure that's not supposed to be if (!parent.isValid())?

[Subuday]

@JonB Thanks!