How to limit number shown rows in list model using proxy model?

Subuday

I can't figure out how to limit number shown rows in list model using proxy 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();
}

mrjj

Hi
What do you have for
setFilterRegExp( );
https://doc.qt.io/qt-5/qsortfilterproxymodel.html#filterRegExp-prop
or https://doc.qt.io/qt-5/qsortfilterproxymodel.html#setFilterFixedString
to do the actual filtering ?

SGaist

Hi,

To add to @mrjj : https://doc.qt.io/qt-5/qsortfilterproxymodel.html#filterRegularExpression-prop ?

SGaist

Isn't that the same question as you posted here ?

Thus the same answer as @JonB applies here too:

@Subuday said in How to limit number shown rows in list model using proxy model?:

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

You got your if wrong.