QComboBox with Data and DisplayValues
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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. -
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();
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@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. -
Either that or create a subclass of QSqlQueryModel that handles the UserRole