Tableview QML not displaying data from QAbstractTableModel

[saitej]

Hi

I have been trying to add a table in QML based on the QAbstractTableModel class. The table view is not displaying any data. This is my model in C++.

paramModel.h

#ifndef PARAMMODEL_H
#define PARAMMODEL_H

///
/// \brief The paramModel class
///

/*
 * Param table columns:
 * Index
 * Param NAME
 * Param Value
*/

#include <QAbstractTableModel>
#include<QVariantMap>
#include<QMap>
#include<QDebug>
#include <QObject>

class paramModel :public QAbstractTableModel
{
    Q_OBJECT

    enum Role {
        IndexRole=Qt::UserRole +1,
        NameRole,
        ValueRole
    };
public:
    explicit paramModel(QObject *parent = nullptr);
    int rowCount(const QModelIndex &parent)const override;
    int columnCount(const QModelIndex &parent) const override;
    QVariant data(const QModelIndex &index, int role) const override;
    void setParams(QMap<int, QVariantMap> paramList);
//    QVariant headerData(int section, Qt::Orientation orientation, int role) const override;

    QHash<int, QByteArray> roleNames() const override;



//    void addParam(int paramID, QMap<QString,QVariant> param);
//    void removeParam(int row);
//    bool setData(const QModelIndex &index, const QVariant &value, int role);
private:
    QMap<int, QVariantMap> _paramsList;
};

#endif // PARAMMODEL_H

paramModel.cpp

#include "parammodel.h"

paramModel::paramModel(QObject *parent) :
    QAbstractTableModel(parent)
{

}

int paramModel::rowCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent)
    return _paramsList.size();

}

int paramModel::columnCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent)
    return 3;

}

QVariant paramModel::data(const QModelIndex &index, int role) const
{
    qDebug() << __func__;

    if(!index.isValid())
        return QVariant();

    if(index.row() >= _paramsList.size() || index.row() < 0)
        return QVariant();

    QMap<QString,QVariant> m = _paramsList[index.row()];
    QMapIterator<QString, QVariant> iter(m);
    iter.next();
    switch (role) {
    case IndexRole:
        return index.row();
    case NameRole:

        return  iter.key();

    case ValueRole:

        return  iter.value();
    default:
        qDebug() << "in data default";
        return QVariant();


    }
}

void paramModel::setParams(QMap<int, QVariantMap> paramList)
{
    _paramsList = paramList;

}


QHash<int, QByteArray> paramModel::roleNames() const
{
    QHash<int, QByteArray> roles;
    roles[IndexRole] = "index";
    roles[NameRole] = "paramName";
    roles[ValueRole] = "paramValue";
    return roles;
}

Params.qml

import QtQuick 2.14
import GCS.ScreenController 1.0
import ParamModel 1.0  //have registered this model
import '../QML'

TableView{

    //    anchors.fill: parent
    columnSpacing: 1
    rowSpacing: 1
    clip: true


    model:  vehicle.paramModel

    delegate :
        Rectangle {
        implicitWidth: 100
        implicitHeight: 50
        border.width: 1

        Text {
            text: display
            anchors.centerIn: parent
        }
    }
}

paramModel attached in QML is a QProperty in vehicle class.
I have not used QML much and will be very thankful for any suggestions.

Thanks