mysortfilterproxymodel.cpp Example File | Qt Widgets 5.6

Qt 5.6 | Qt Widgets | Custom Sort/Filter Model Example | mysortfilterproxymodel.cpp Example File

Qt 5.6.2 Reference Documentation

# mysortfilterproxymodel.cpp Example File

itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp

      /****************************************************************************
      **
      ** 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 <QtWidgets>

      #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 {
              static QRegExp emailPattern("[\\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);
      }