Qt 4.3: mysortfilterproxymodel.cpp Example File (itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp)

|  | Home · All Classes · Main Classes · Grouped Classes · Modules · Functions |

# mysortfilterproxymodel.cpp Example File
itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2006-2008 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the documentation of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
    ** License versions 2.0 or 3.0 as published by the Free Software
    ** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
    ** included in the packaging of this file.  Alternatively you may (at
    ** your option) use any later version of the GNU General Public
    ** License if such license has been publicly approved by Trolltech ASA
    ** (or its successors, if any) and the KDE Free Qt Foundation. In
    ** addition, as a special exception, Trolltech gives you certain
    ** additional rights. These rights are described in the Trolltech GPL
    ** Exception version 1.2, which can be found at
    ** http://www.trolltech.com/products/qt/gplexception/ and in the file
    ** GPL_EXCEPTION.txt in this package.
    **
    ** Please review the following information to ensure GNU General
    ** Public Licensing requirements will be met:
    ** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
    ** you are unsure which license is appropriate for your use, please
    ** review the following information:
    ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
    ** or contact the sales department at sales@trolltech.com.
    **
    ** In addition, as a special exception, Trolltech, as the sole
    ** copyright holder for Qt Designer, grants users of the Qt/Eclipse
    ** Integration plug-in the right for the Qt/Eclipse Integration to
    ** link to functionality provided by Qt Designer and its related
    ** libraries.
    **
    ** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
    ** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
    ** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
    ** granted herein.
     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #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);
     }