tablemodel.cpp Example File | Qt Widgets 5.12.5

Qt 5.12 | Qt Widgets | Address Book Example | tablemodel.cpp Example File

Qt 5.12.5 Reference Documentation

# tablemodel.cpp Example File

itemviews/addressbook/tablemodel.cpp

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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;
      }