tablemodel.cpp Example File

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 #include "tablemodel.h"

 TableModel::TableModel(QObject *parent)
     : QAbstractTableModel(parent)
 {
 }

 TableModel::TableModel(QList<Contact> contacts, QObject *parent)
     : QAbstractTableModel(parent)
     , contacts(contacts)
 {
 }

 int TableModel::rowCount(const QModelIndex &parent) const
 {
     Q_UNUSED(parent);
     return contacts.size();
 }

 int TableModel::columnCount(const QModelIndex &parent) const
 {
     Q_UNUSED(parent);
     return 2;
 }

 QVariant TableModel::data(const QModelIndex &index, int role) const
 {
     if (!index.isValid())
         return QVariant();

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

     if (role == Qt::DisplayRole) {
         const auto &contact = contacts.at(index.row());

         if (index.column() == 0)
             return contact.name;
         else if (index.column() == 1)
             return contact.address;
     }
     return QVariant();
 }

 QVariant TableModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
     if (role != Qt::DisplayRole)
         return QVariant();

     if (orientation == Qt::Horizontal) {
         switch (section) {
             case 0:
                 return tr("Name");

             case 1:
                 return tr("Address");

             default:
                 return QVariant();
         }
     }
     return QVariant();
 }

 bool TableModel::insertRows(int position, int rows, const QModelIndex &index)
 {
     Q_UNUSED(index);
     beginInsertRows(QModelIndex(), position, position + rows - 1);

     for (int row = 0; row < rows; ++row)
         contacts.insert(position, { QString(), QString() });

     endInsertRows();
     return true;
 }

 bool TableModel::removeRows(int position, int rows, const QModelIndex &index)
 {
     Q_UNUSED(index);
     beginRemoveRows(QModelIndex(), position, position + rows - 1);

     for (int row = 0; row < rows; ++row)
         contacts.removeAt(position);

     endRemoveRows();
     return true;
 }

 bool TableModel::setData(const QModelIndex &index, const QVariant &value, int role)
 {
     if (index.isValid() && role == Qt::EditRole) {
         int row = index.row();

         auto contact = contacts.value(row);

         if (index.column() == 0)
             contact.name = value.toString();
         else if (index.column() == 1)
             contact.address = value.toString();
         else
             return false;

         contacts.replace(row, contact);
         emit dataChanged(index, index, {role});

         return true;
     }

     return false;
 }

 Qt::ItemFlags TableModel::flags(const QModelIndex &index) const
 {
     if (!index.isValid())
         return Qt::ItemIsEnabled;

     return QAbstractTableModel::flags(index) | Qt::ItemIsEditable;
 }

 QList<Contact> TableModel::getContacts() const
 {
     return contacts;
 }