How can I create a model from a vector of objects so I can use it with a QTableView? it must inherit from what class and must implement what methods?

[jdent]

How can I create a model from a vector of objects so I can use it with a QTableView?

it must inherit from what class and must implement what methods?

[JonB]

@jdent said in How can I create a model from a vector of objects so I can use it with a QTableView? it must inherit from what class and must implement what methods?:

it must inherit from what class and must implement what methods?

Since it's void QTableView::setModel(QAbstractItemModel *model), see https://doc.qt.io/qt-6/qabstractitemmodel.html#subclassing for a QAbstractItemModel, which you could use with a vector data store. See https://doc.qt.io/qt-6/qabstracttablemodel.html#subclassing if you want a table. They tell you which methods you must write.

[jdent]

@JonB Is this a valid start? Please help me I am lost!

class VectorModel  : public QAbstractTableModel
{
	Q_OBJECT


		std::vector<Claim> rows;
public:
	VectorModel(QObject *parent);
	~VectorModel();

	int rowCount(const QModelIndex& parent) const override
	{
		if(parent.isValid())
			return 0;
		return rows.size();
	}

	int columnCount(const QModelIndex& parent) const override
	{
		return 14;
	}

	QVariant data(const QModelIndex& index, int role) const override
	{
		Claim claim = rows[index.row()];
		return claim.id;
	}
};

[JonB]

@jdent
Yes, good start. Will produce a read-only model. The reference states all the methods you need to override.

In data() you must test role and only return yours on Display/EditRole. Else an invalid variant, QVariant() or call base methodQAbstractTableModel::data(index, role). And if you are going to have 14 columns you need to provide that data and take index.column() into account in data().

If you really only want a model of a vector of something then columns needs to return 1. QAbstractListModel Class would then save you implementing most stuff.

There is some inconsistency: if you want a QTableView not a QListView then presumably your model actual contains more data (columns) than just a vector. Which do you want?