Qt 5.9 | Qt Widgets | Custom Sort/Filter Model Example | mysortfilterproxymodel.cpp Example File

Qt 5.9.9 Reference Documentation

# mysortfilterproxymodel.cpp Example File

itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp

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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);
      }