QComboBox with Data and DisplayValues

[Andy314]

I want show a simple Combox with displaytext but with internal valuedata which I can set and read. The documentation says that one should use the Qt:UserRole for the valuedata.
So I have checked this simple code:

    // ui->Voyage is a ComboxBox fillled with a QSqlQueryModel, 
    ui->Voyage->setItemData(0, 1, Qt::UserRole);
    int k=ui->Voyage->itemData(0, Qt::UserRole).toInt();   //  k==0   !

But it does not work. k==0.
Whats the trick.

[SGaist]

Hi,

Maybe a silly question but does the combo box hold something when you call that code ?

try with:

ui->Voyage->addItem(tr("TestMe"));
ui->Voyage->setItemData(0, 1, Qt::UserRole);
int k=ui->Voyage->itemData(0, Qt::UserRole).toInt();

[Andy314]

@SGaist
It holds something: a QSqlQueryModel by setModel().
I have thought about the mechnismn. I think the combination of "dynamic" database data for the display-text and fixed data for the UserRole can not work !? Respectively I should put the UserData in the model.

Therefore I use the data in the model directy now and fill the
Combox (addItem(DisplayText, ID) by code. So it work.

[SGaist]

Either that or create a subclass of QSqlQueryModel that handles the UserRole