mysortfilterproxymodel.cpp Example File

 /****************************************************************************
 **
 ** Copyright (C) 2015 The Qt Company Ltd.
 ** Contact: http://www.qt.io/licensing/
 **
 ** 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 The Qt Company Ltd 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);
 }