QAbstractListModel searching.

I'm currently having trouble with writing my IRC client. When changing a user's channel status, and doing it my own self it updates fine. But when testing it with another client in a channel. Removing and adding statuses, the QListView model will not update the User's icons unless I move my mouse over the QListView. Currently I'm thinking the way I have it right now is just slow as hell and what not. Is there a better way of optimising the searching of a user?

Code:

void
ChannelTab::slotOnMode(const QString &from, const QString &channel, const QString &mode, const QString &nick)
{
    if (name() != channel) {
        return;
    }
 
    enum {
        None,
        Give,
        Take
    };
    int state = None;
 
    QModelIndex index;
    Aki::Irc::User *user = 0;
 
    //Aki::Irc::User *user = d->userList->model()->data(d->userList->currentIndex(), NickListModel::IrcUserRole)
    //                            .value<Aki::Irc::User*>();
 
    for (int i = 0; i < d->userList->count(); ++i) {
        index = d->userList->model()->index(i, 0);
        user = d->userList->model()->data(index, NickListModel::IrcUserRole).value<Aki::Irc::User*>();
        if (user->nick() == nick) {
            kDebug() << "found";
            break;
        }
    }
 
    if (!user) {
        return;
    }
 
    QString modes = user->modes();
    bool fromYou = from == d->socket->currentNick();
    bool toYou = nick == d->socket->currentNick();
 
    foreach (QChar c, mode) {
        if (c == QChar('+')) {
            state = Give;
            kDebug() << "Give";
        } else if (c == QChar('-')) {
            state = Take;
            kDebug() << "Take";
        } else if (c == QChar('o')) {
            if (state == Give) {
                user->setModes(modes + c);
                d->userList->model()->setData(d->userList->currentIndex(),
                                              QVariant::fromValue<Aki::Irc::User*>(user),
                                              NickListModel::IrcUserRole);
                d->channelOutput->addMode(from, nick, c, toYou, fromYou);
            } else if (state == Take) {
                user->removeModes(c);
                d->userList->model()->setData(d->userList->currentIndex(),
                                              QVariant::fromValue<Aki::Irc::User*>(user),
                                              NickListModel::IrcUserRole);
                d->channelOutput->addRemoveMode(from, nick, c, toYou, fromYou);
            }
        } else if (c == QChar('v')) {
            if (state == Give) {
                user->setModes(modes + c);
                d->userList->model()->setData(d->userList->currentIndex(),
                                              QVariant::fromValue<Aki::Irc::User*>(user),
                                              NickListModel::IrcUserRole);
                d->channelOutput->addMode(from, nick, c, toYou, fromYou);
            } else if (state == Take) {
                user->removeModes(c);
                d->userList->model()->setData(d->userList->currentIndex(),
                                              QVariant::fromValue<Aki::Irc::User*>(user),
                                              NickListModel::IrcUserRole);
                d->channelOutput->addRemoveMode(from, nick, c, toYou, fromYou);
            }
        } else if (c == QChar('h')) {
            if (state == Give) {
                user->setModes(modes + c);
                d->userList->model()->setData(d->userList->currentIndex(),
                                              QVariant::fromValue<Aki::Irc::User*>(user),
                                              NickListModel::IrcUserRole);
                d->channelOutput->addMode(from, nick, c, toYou, fromYou);
            } else if (state == Take) {
                user->removeModes(c);
                d->userList->model()->setData(d->userList->currentIndex(),
                                              QVariant::fromValue<Aki::Irc::User*>(user),
                                              NickListModel::IrcUserRole);
                d->channelOutput->addRemoveMode(from, nick, c, toYou, fromYou);
            }
        }
    }
}