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 #include <QtGui>
 
 #include "mysortfilterproxymodel.h"
 
 MySortFilterProxyModel::MySortFilterProxyModel(QObject *parent)
     : QSortFilterProxyModel(parent)
 {
 }
 
 void MySortFilterProxyModel::setFilterMinimumDate(const QDate &amp;date)
 {
     minDate = date;
     invalidateFilter();
 }
 
 void MySortFilterProxyModel::setFilterMaximumDate(const QDate &amp;date)
 {
     maxDate = date;
     invalidateFilter();
 }
 
 bool MySortFilterProxyModel::filterAcceptsRow(int sourceRow,
         const QModelIndex &amp;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()))
            &amp;&amp; dateInRange(sourceModel()->data(index2).toDate());
 }
 
 bool MySortFilterProxyModel::lessThan(const QModelIndex &amp;left,
                                       const QModelIndex &amp;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 &amp;&amp; emailPattern->indexIn(leftString) != -1)
             leftString = emailPattern->cap(1);
 
         QString rightString = rightData.toString();
         if(right.column() == 1 &amp;&amp; emailPattern->indexIn(rightString) != -1)
             rightString = emailPattern->cap(1);
 
         return QString::localeAwareCompare(leftString, rightString) < 0;
     }
 }
 
 bool MySortFilterProxyModel::dateInRange(const QDate &amp;date) const
 {
     return (!minDate.isValid() || date > minDate)
            &amp;&amp; (!maxDate.isValid() || date < maxDate);
 }