Properties in data for subclass of QAbstractListModel

[dxm_surfer]

Hi there,
I want to have a custom ListModel, so I extended QAbstractListModel. My Data has a property and so it has to be a subclass of QObject.
This is the code of the four files:

#ifndef SIMPLEDATA_H
#define SIMPLEDATA_H

#include <QObject>

class SimpleData : public QObject {

    Q_OBJECT
    Q_PROPERTY(QString value READ value WRITE setValue NOTIFY valueChanged)

public:
    SimpleData(QObject *parent = 0);
    ~SimpleData();

    void setValue(const QString &value);
    QString value() const;

signals:
    void valueChanged(QString);

private:
    QString m_value;
};

#endif // SIMPLEDATA_H

#include "simpledata.h"

SimpleData::SimpleData(QObject *parent) : QObject(parent) { }

SimpleData::~SimpleData() { }

void SimpleData::setValue(const QString &value) {
    m_value = value;
    emit valueChanged(m_value);
}

QString SimpleData::value() const {
    return m_value;
}

#ifndef SIMPLEMODEL_H
#define SIMPLEMODEL_H

#include <QAbstractListModel>
#include "simpledata.h"

class SimpleModel : public QAbstractListModel {

    Q_OBJECT

public:
    enum SimpleDataRoles {
        ValueRole = Qt::UserRole + 1
    };

    SimpleModel(QObject *parent = 0);

    void addData(const SimpleData &data);
    int rowCount(const QModelIndex &parent = QModelIndex()) const;
    QVariant data(const QModelIndex &index, int role) const;


protected:
    QHash<int, QByteArray> roleNames() const;

private:
    QList<SimpleData> m_data;
};

#endif // SIMPLEMODEL_H

#include "simplemodel.h"

SimpleModel::SimpleModel(QObject *parent) : QAbstractListModel(parent) { }

void SimpleModel::addData(const SimpleData &data) {
    beginInsertRows(QModelIndex(), rowCount(), rowCount());
    m_data << data;
    endInsertRows();
}

int SimpleModel::rowCount(const QModelIndex &parent) const {
    Q_UNUSED(parent);
    return m_data.count();
}

QVariant SimpleModel::data(const QModelIndex &index, int role) const {
    if(index.row() < 0 || index.row() >= m_data.count()) return QVariant();

    const SimpleData &data = m_data[index.row()];
    if(role == ValueRole) return data.value();

    return QVariant();
}

QHash<int, QByteArray> SimpleModel::roleNames() const {
    QHash<int, QByteArray> roles;
    roles[ValueRole] = "value";

    return roles;
}

I'm sorry I can't give you less code, but I don't have any clue about the source of the error. The compiler says:

/home/xxx/Qt/5.7/gcc_64/include/QtCore/qlist.h:431: error: use of deleted function 'SimpleData::SimpleData(const SimpleData&)'
     if (QTypeInfo<T>::isLarge || QTypeInfo<T>::isStatic) n->v = new T(t);

Additionally, there are several errors about private constructors of QObject.
Can you explain me where I made the mistake and why those errors occur?
Thanks

[mrjj]

@dxm_surfer said:

QList<SimpleData> m_data;

Hi and welcome
Due to signals and design, QObject based classes are not allowed to be copied .

So
QList<SimpleData> m_data;
should be
QList<SimpleData *> m_data;
please see
http://doc.qt.io/qt-5/qobject.html
section
No Copy Constructor or Assignment Operator

[VRonin]

QObjects can't be copied.
if you can remove the NOTIFY from the property and hence the signal you can remove the QObject inheritance and change Q_OBJECT to Q_GADGET otherwise you'll have to save a pointer to the QObject not the Qobject itself

[dxm_surfer]

Thanks, I think I got it. I don't feel that comfortable with C++ though...