Using C++ as Value of List Element in QML

[jweb1]

Qt Quick Version : 2
Qt Version: 6.4

Hi all,
I'm wanting to display many CANbus signals that come from a C++ class in a list format on a QML screen.

I'm using a ListView with a ListModel that is populated with the value from the C++ class. When using text the output is what I want, however, when I replace with the C++ class value, I get the following error:

Any help or potential alternative approaches is greatly appreciated.
jweb1

[Anumas]

Hi, looks like you haven't read the documentation yet: https://doc.qt.io/qt-6/qml-qtqml-models-listelement.html

It clearly says what type of values ListElement accept: Values must be simple constants; either strings (quoted and optionally within a call to QT_TR_NOOP), boolean values (true, false), numbers, or enumeration values (such as AlignText.AlignHCenter).

From 5.11 ListElement accepts callable roles: Beginning with Qt 5.11 ListElement also allows assigning a function declaration to a role. This allows the definition of ListElements with callable actions.

What you should do is to create a class subclassing from QAbstractListModel to fetch your data and then pass it to QML. Or use ListModel dynamically without declaring any ListElement to manipulate it through its API.

https://doc.qt.io/qt-6/qabstractlistmodel.html
https://doc.qt.io/qt-6/qml-qtqml-models-listmodel.html