Russian Qt Forum

class Widget : public QWidget
class Thread : public QThread

void Widget::slotFind(const QModelIndex &index)
{
    QDir dir = QDir(model.filePath(index));
    emit signal_consider(dir);

    QObject::connect(this, SIGNAL(signal_consider(const QDir &)), thread,
                                    SLOT(slot_consider(const QDir &)));
    thread->start();
}

QObject::connect(treeView_1, SIGNAL(clicked(const QModelIndex &)), this,
                     SLOT(slotFind(const QModelIndex &)));