Bind a QAbstractListModel derived listmodel member of an object in QML as Q_PROPERTY
c++, qabstractlistmodel, qml, qt, qt-quick
Solution
QObjects like QAbstractItemModels cannot be copied, you must use a pointer. I’d use:
Q_PROPERTY(MyListModel* myListModel READ myListModel CONSTANT)
As you don’t replace the model itself, just its content, you don’t need the myListModelChanged() signal and can mark it as `CONSTANT`.
Your getter already has the right type, although it should be const:
MyListModel *MyObject::myListModel() const
Problem
I figured out how to expose and bind an instance of a QAbstractListModel derived listmodel to/in QML. But what I really want to do is to expose an object to QML and bind a member which is a QAbstractListModel derived listmodel as Q_PROPERTY. I've tried it this way: ``` class MyObject : public QObject { Q_OBJECT Q_PROPERTY(MyListModel myListModel READ myListModel NOTIFY myListModelChanged) public: explicit MyObject(QObject *parent = 0); MyListModel *myListModel(); signals: void myListModelChanged(); public slots: private: MyListModel *m_myListModel; }; MyObject::MyObject(QObject *parent) : QObject(parent) { m_myListModel = new MyListModel(this); } MyListModel *MyObject::myListModel() { return m_myListModel; } class MyListModel : public QAbstractListModel { Q_OBJECT //... //... } int main(int argc, char *argv[]) { QGuiApplication a(argc, argv); QQuickView *view = new QQuickView(); MyObject *myObject = new MyObject(); view->engine()->rootContext()->setContextProperty("myObject", myObject); view->setSource(QUrl::fromLocalFile("main.qml")); view->show(); return a.exec(); } Rectangle { width: 200 height: 200 //... //... ListView { id: myListView anchors.fill: parent delegate: myDelegate model: myObject.myListModel } } ``` But I'm getting an compile error: E:\Qt\Qt5\5.1.1\mingw48_32\include\QtCore\qglobal.h:946: error: 'QAbstractListModel& QAbstractListModel::operator=(const QAbstractListModel&)' is private Class &operator=(const Class &) Q_DECL_EQ_DELETE; ^ How is the right way to do this?