contactmodel.cpp Example File

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  #include "contactmodel.h"

  ContactModel::ContactModel(QObject *parent ) : QAbstractListModel(parent)
  {
      m_contacts.append({ "Angel Hogan", "Chapel St. 368 ", "Clearwater" , "0311 1823993" });
      m_contacts.append({ "Felicia Patton", "Annadale Lane 2", "Knoxville" , "0368 1244494" });
      m_contacts.append({ "Grant Crawford", "Windsor Drive 34", "Riverdale" , "0351 7826892" });
      m_contacts.append({ "Gretchen Little", "Sunset Drive 348", "Virginia Beach" , "0343 1234991" });
      m_contacts.append({ "Geoffrey Richards", "University Lane 54", "Trussville" , "0423 2144944" });
      m_contacts.append({ "Henrietta Chavez", "Via Volto San Luca 3", "Piobesi Torinese" , "0399 2826994" });
      m_contacts.append({ "Harvey Chandler", "North Squaw Creek 11", "Madisonville" , "0343 1244492" });
      m_contacts.append({ "Miguel Gomez", "Wild Rose Street 13", "Trussville" , "0343 9826996" });
      m_contacts.append({ "Norma Rodriguez", " Glen Eagles Street  53", "Buffalo" , "0241 5826596" });
      m_contacts.append({ "Shelia Ramirez", "East Miller Ave 68", "Pickerington" , "0346 4844556" });
      m_contacts.append({ "Stephanie Moss", "Piazza Trieste e Trento 77", "Roata Chiusani" , "0363 0510490" });
  }

  int ContactModel::rowCount(const QModelIndex &) const
  {
      return m_contacts.count();
  }

  QVariant ContactModel::data(const QModelIndex &index, int role) const
  {
      if (index.row() < rowCount())
          switch (role) {
          case FullNameRole: return m_contacts.at(index.row()).fullName;
          case AddressRole: return m_contacts.at(index.row()).address;
          case CityRole: return m_contacts.at(index.row()).city;
          case NumberRole: return m_contacts.at(index.row()).number;
          default: return QVariant();
      }
      return QVariant();
  }

  QHash<int, QByteArray> ContactModel::roleNames() const
  {
      static const QHash<int, QByteArray> roles {
          { FullNameRole, "fullName" },
          { AddressRole, "address" },
          { CityRole, "city" },
          { NumberRole, "number" }
      };
      return roles;
  }

  QVariantMap ContactModel::get(int row) const
  {
      const Contact contact = m_contacts.value(row);
      return { {"fullName", contact.fullName}, {"address", contact.address}, {"city", contact.city}, {"number", contact.number} };
  }

  void ContactModel::append(const QString &fullName, const QString &address, const QString &city, const QString &number)
  {
      int row = 0;
      while (row < m_contacts.count() && fullName > m_contacts.at(row).fullName)
          ++row;
      beginInsertRows(QModelIndex(), row, row);
      m_contacts.insert(row, {fullName, address, city, number});
      endInsertRows();
  }

  void ContactModel::set(int row, const QString &fullName, const QString &address, const QString &city, const QString &number)
  {
      if (row < 0 || row >= m_contacts.count())
          return;

      m_contacts.replace(row, { fullName, address, city, number });
      dataChanged(index(row, 0), index(row, 0), { FullNameRole, AddressRole, CityRole, NumberRole });
  }

  void ContactModel::remove(int row)
  {
      if (row < 0 || row >= m_contacts.count())
          return;

      beginRemoveRows(QModelIndex(), row, row);
      m_contacts.removeAt(row);
      endRemoveRows();
  }