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#include <QtGui>

#include "mysortfilterproxymodel.h"

//! [0]

MySortFilterProxyModel::MySortFilterProxyModel(QObject *parent)

    : QSortFilterProxyModel(parent)

{

}

//! [0]

//! [1]

void MySortFilterProxyModel::setFilterMinimumDate(const QDate &date)

{

    minDate = date;

    invalidateFilter();

}

//! [1]

//! [2]

void MySortFilterProxyModel::setFilterMaximumDate(const QDate &date)

{

    maxDate = date;

    invalidateFilter();

}

//! [2]

//! [3]

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());

}

//! [3]

//! [4] //! [5]

bool MySortFilterProxyModel::lessThan(const QModelIndex &left,

                                      const QModelIndex &right) const

{

    QVariant leftData = sourceModel()->data(left);

    QVariant rightData = sourceModel()->data(right);

//! [4]

//! [6]

    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 && 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;

    }

}

//! [5] //! [6]

//! [7]

bool MySortFilterProxyModel::dateInRange(const QDate &date) const

{

    return (!minDate.isValid() || date > minDate)

           && (!maxDate.isValid() || date < maxDate);

}

//! [7]