- Qt 5.5
- Qt Widgets
- Custom Sort/Filter Model Example
- mysortfilterproxymodel.cpp Example File
- Qt 5.5.1 Reference Documentation

# mysortfilterproxymodel.cpp Example File

itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp

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    ** This file is part of the examples of the Qt Toolkit.
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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);
    }