Qt 4.8: tablemodel.cpp Example File (itemviews/addressbook/tablemodel.cpp)

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# tablemodel.cpp Example File

itemviews/addressbook/tablemodel.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
     ** Contact: http://www.qt-project.org/legal
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
     **     notice, this list of conditions and the following disclaimer.
     **   * Redistributions in binary form must reproduce the above copyright
     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
     **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
     **     of its contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
     **
     **
     ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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     ****************************************************************************/

     #include "tablemodel.h"

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

     TableModel::TableModel(QList< QPair<QString, QString> > pairs, QObject *parent)
         : QAbstractTableModel(parent)
     {
         listOfPairs=pairs;
     }

     int TableModel::rowCount(const QModelIndex &parent) const
     {
         Q_UNUSED(parent);
         return listOfPairs.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() >= listOfPairs.size() || index.row() < 0)
             return QVariant();

         if (role == Qt::DisplayRole) {
             QPair<QString, QString> pair = listOfPairs.at(index.row());

             if (index.column() == 0)
                 return pair.first;
             else if (index.column() == 1)
                 return pair.second;
         }
         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++) {
             QPair<QString, QString> pair(" ", " ");
             listOfPairs.insert(position, pair);
         }

         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) {
             listOfPairs.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();

             QPair<QString, QString> p = listOfPairs.value(row);

             if (index.column() == 0)
                 p.first = value.toString();
             else if (index.column() == 1)
                 p.second = value.toString();
             else
                 return false;

             listOfPairs.replace(row, p);
             emit(dataChanged(index, index));

             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< QPair<QString, QString> > TableModel::getList()
     {
         return listOfPairs;
     }