Qt Reference Documentation

# mysortfilterproxymodel.cpp Example File

itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** 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 Nokia Corporation 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,
     ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include <QtGui>

     #include "mysortfilterproxymodel.h"

     MySortFilterProxyModel::MySortFilterProxyModel(QObject *parent)
         : QSortFilterProxyModel(parent)
     {
     }

     void MySortFilterProxyModel::setFilterMinimumDate(const QDate &date)
     {
         minDate = date;
         invalidateFilter();
     }

     void MySortFilterProxyModel::setFilterMaximumDate(const QDate &date)
     {
         maxDate = date;
         invalidateFilter();
     }

     bool MySortFilterProxyModel::filterAcceptsRow(int sourceRow,
             const QModelIndex &sourceParent) const
     {
         QModelIndex index0 = sourceModel()->index(sourceRow, 0, sourceParent);
         QModelIndex index1 = sourceModel()->index(sourceRow, 1, sourceParent);
         QModelIndex index2 = sourceModel()->index(sourceRow, 2, sourceParent);

         return (sourceModel()->data(index0).toString().contains(filterRegExp())
                 || sourceModel()->data(index1).toString().contains(filterRegExp()))
                && dateInRange(sourceModel()->data(index2).toDate());
     }

     bool MySortFilterProxyModel::lessThan(const QModelIndex &left,
                                           const QModelIndex &right) const
     {
         QVariant leftData = sourceModel()->data(left);
         QVariant rightData = sourceModel()->data(right);

         if (leftData.type() == QVariant::DateTime) {
             return leftData.toDateTime() < rightData.toDateTime();
         } else {
             QRegExp *emailPattern = new QRegExp("([\\w\\.]*@[\\w\\.]*)");

             QString leftString = leftData.toString();
             if(left.column() == 1 && emailPattern->indexIn(leftString) != -1)
                 leftString = emailPattern->cap(1);

             QString rightString = rightData.toString();
             if(right.column() == 1 && emailPattern->indexIn(rightString) != -1)
                 rightString = emailPattern->cap(1);

             return QString::localeAwareCompare(leftString, rightString) < 0;
         }
     }

     bool MySortFilterProxyModel::dateInRange(const QDate &date) const
     {
         return (!minDate.isValid() || date > minDate)
                && (!maxDate.isValid() || date < maxDate);
     }