tablemodel.cpp Example File | Qt Widgets 5.12.10

- Qt 5.12
- Qt Widgets
- Address Book Example
- tablemodel.cpp Example File
- Qt 5.12.10 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;
     }