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mysortfilterproxymodel.cpp Example File
itemviews/customsortfiltermodel/mysortfilterproxymodel.cpp

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**
** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
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** information about Qt Commercial License Agreements.
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#include <QtGui>

#include "mysortfilterproxymodel.h"

MySortFilterProxyModel::MySortFilterProxyModel(QObject *parent)
    : QSortFilterProxyModel(parent)
{
}

void MySortFilterProxyModel::setFilterMinimumDate(const QDate &date)
{
    minDate = date;
    clear();
}

void MySortFilterProxyModel::setFilterMaximumDate(const QDate &date)
{
    maxDate = date;
    clear();
}

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 {
        return QString::localeAwareCompare(leftData.toString(),
                                           rightData.toString()) < 0;
    }
}

bool MySortFilterProxyModel::dateInRange(const QDate &date) const
{
    return (!minDate.isValid() || date > minDate)
           && (!maxDate.isValid() || date < maxDate);
}


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Qt 4.2.0-rc1