Checkbox Setfocus

[afro_cv]

I need an example, as moves to a qlineedit after i presses a checkbox:
something like that

ui->txtGarg - QLineEdit
 
void protocolonutri::on_cboOthersGarg_toggled(bool checked)
{
    ui->txtGarg->setEnabled(checked);
    if (!checked)
         ui->txtGarg->setText("");
 
else
      ui->txtGarg->setFocus();
}

ui->txtGarg - QLineEdit

void protocolonutri::on_cboOthersGarg_toggled(bool checked)
{
    ui->txtGarg->setEnabled(checked);
    if (!checked)
         ui->txtGarg->setText("");
 
else
      ui->txtGarg->setFocus();
}

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SetFocus Doesnt Work Well, how i can do?
Sorry for my english

[qlands]

Try setFocus(Qt::OtherFocusReason)

[afro_cv]

i try but dont work