Возьмите виджет из QLayout

Question

void TransFormWidgetFromDepotoSaha::sendInformFromDepotoSaha(vector<QTreeWidgetItem *> myvec)
{

    for(unsigned int i=0;i<myvec.size();i++){
        newvec.push_back(myvec.at(i));
        currentid.push_back(myvec.at(i)->text(6).toDouble());
        ma = new QLineEdit();ma->setMinimumWidth(400);ms = new QLineEdit();
        mb = new QLineEdit();tb = new QLineEdit();
        ma->setText(myvec.at(i)->text(3));
        ms->setText(myvec.at(i)->text(6));
        mb->setText(myvec.at(i)->text(7));
        tb->setText(myvec.at(i)->text(11));
        layout = new QHBoxLayout();
        layout->addWidget(ma);
        layout->addWidget(ms);
        layout->addWidget(mb);
        layout->addWidget(tb);
        ui->MainLayout->addLayout(layout);
    }
}

void TransFormWidgetFromDepotoSaha::on_pushButton_clicked()
{

    for(unsigned int i=0;i<newvec.size();i++){
        qDebug()<<"value is : "<<ui->MainLayout->count();
        QLayoutItem *ed = ui->MainLayout->takeAt(i);

        newvec.at(i)->setText(6,ms->text());
        double mycurr = currentid.at(i) - newvec.at(i)->text(6).toDouble();
        QString temp = QString::number(mycurr);
        if(mycurr>0){
            warehousemainwaredb->updatebase(newvec.at(i)->text(0), temp );
        }
        else{
            warehousemainwaredb->deletebase(newvec.at(i)->text(0));
        }
    }
    startTransform(newvec);
}

Я хочу взять QLineEdit текст с каждого QLineEdit.Как я могу это сделать?