mysortfilterproxymodel.cpp Example File

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  #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);
  }