how to retrieve list element

[mzimmers]

Hi all -

This one's a little complicated; I've simplified the code as much as possible.

I have a list of zones; each zone has its own list of equipment. I'm trying to retrieve the equipment list using a model, based on the currently selected zone in the zone list, then retrieving each equipment item using a delegate.

Where I'm stuck is how to code the retrieval of the equipment list element. Here's my code:

class EquipmentItem
{
    Q_GADGET
    Q_PROPERTY(QString name MEMBER m_name)
    QString m_name;
public:
    Q_INVOKABLE QString name() const { return m_name; }
}

typedef QList<QUuid> ZoneEquipmentList;

class Zone {
    Q_GADGET
    ZoneEquipmentList m_equipmentList;
public:
    Q_PROPERTY(ZoneEquipmentList equipmentList MEMBER m_equipmentList)
    ZoneEquipmentList equipmentList() const { return m_equipmentList; }
}

class ZoneModel: public QAbstractListModel
{
    Q_OBJECT
private:
    ZoneList *m_list;
public:
    Q_INVOKABLE Zone getZone(int index) {
        Zone z = Zone();
        if (m_list->size() >= index + 1) {
            z = m_list->getItem(index);
        }
        return z;
    }
}

GridView {
    id: equipmentView

    model: zoneModel.getZone(zoneSelected).equipmentList
    delegate: Text{
        id: card
        text: // ??? what do I do here???
    }
}

Thanks...this one has me going cross-eyed.

EDIT: I probably should have mentioned that when I try this:

delegate: Text {
    text: "Equipmentscreen.qml: " + model.name
}

then "model.name" comes back as undefined. Could this have something to do with roles? My equipment model has them, but the individual equipment item class does not.

Thanks...

[mzimmers]

Well, I figured out one way to do it, though I'm not at all sure it's the best way to do it.

delegate: Text {
    property string equipmentName: equipmentModel.getItem(model.modelData).name()
    text: "Equipmentscreen.qml: " + equipmentName
}

So, the rather circuitous route is:

• go to the zone model to get the selected zone
• from the zone, get its equipment list
• for each item in the list (via the delegate), use the UUID to look up the index in the equipment list
• extract its name and store in a QML string

Similar logic for all other equipment fields I want to report on.

It works, but before I mark this as solved, I'd be interested in critique.

Thanks...