[solved] Combobox UserRole ?

[deleted28]

How can i get the enum values of Parity ?
I expect to get 0, 2 and 3
Problem is, i do not understand the USerrole stuff.

@ ui->cb_test->addItem("NO", QSerialPort::NoParity);
ui->cb_test->addItem("EVEN", QSerialPort::EvenParity);
ui->cb_test->addItem("ODD", QSerialPort::OddParity);@

@void MainWindow::on_cb_test_currentIndexChanged(int index)
{
qDebug() << index;
qDebug() << ui->cb_test->itemData(index, 0);
}@

thank you

[SGaist]

Hi,

@qDebug() << ui->cb_test->itemData(index, 0);@

You are using the wrong role here. By default itemData gets the data from Qt::UserRole so what you put in using addItem. Here you are requesting the data from Qt::DisplayRole

[deleted28]

do you have a suggestion how i can solve my problem ?

[SGaist]

@qDebug() << ui->cb_test->itemData(index);@

[deleted28]

the output of the above is:
@QVariant(int, 0)
QVariant(int, 2)
QVariant(int, 3) @

I want to use this combobox to set QSerialPort parity:

@myQSerielPort->setParity(ui->cb_test->itemData(index); @

[SGaist]

And that's the correct output.

If you want to retrieve the value you have to convert the QVariant back to your enum

[deleted28]

Ahhhhh :), OK thank you

[SGaist]

You're welcome,

Since you have everything working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)