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QxModelRowCompare.h
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    00001 /****************************************************************************
    00002 **
    00003 ** https://www.qxorm.com/
    00004 ** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
    00005 **
    00006 ** This file is part of the QxOrm library
    00007 **
    00008 ** This software is provided 'as-is', without any express or implied
    00009 ** warranty. In no event will the authors be held liable for any
    00010 ** damages arising from the use of this software
    00011 **
    00012 ** Commercial Usage
    00013 ** Licensees holding valid commercial QxOrm licenses may use this file in
    00014 ** accordance with the commercial license agreement provided with the
    00015 ** Software or, alternatively, in accordance with the terms contained in
    00016 ** a written agreement between you and Lionel Marty
    00017 **
    00018 ** GNU General Public License Usage
    00019 ** Alternatively, this file may be used under the terms of the GNU
    00020 ** General Public License version 3.0 as published by the Free Software
    00021 ** Foundation and appearing in the file 'license.gpl3.txt' included in the
    00022 ** packaging of this file. Please review the following information to
    00023 ** ensure the GNU General Public License version 3.0 requirements will be
    00024 ** met : http://www.gnu.org/copyleft/gpl.html
    00025 **
    00026 ** If you are unsure which license is appropriate for your use, or
    00027 ** if you have questions regarding the use of this file, please contact :
    00028 ** contact@qxorm.com
    00029 **
    00030 ****************************************************************************/
    00031
    00032 #ifndef _QX_MODEL_ROW_COMPARE_H_
    00033 #define _QX_MODEL_ROW_COMPARE_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <QxDataMember/IxDataMember.h>
    00047
    00048 namespace qx {
    00049 namespace model_view {
    00050
    00051 QX_DLL_EXPORT bool compareQVariant(const QVariant & v1, const QVariant & v2, bool bAscending) QX_USED;
    00052
    00057 template <typename T>
    00058 struct QxModelRowCompare
    00059 {
    00060
    00061    bool m_bAscendingOrder;
    00062    qx::IxDataMember * m_pDataMember;
    00063
    00064    QxModelRowCompare(bool bAscendingOrder, qx::IxDataMember * pDataMember) : m_bAscendingOrder(bAscendingOrder), m_pDataMember(pDataMember) { qAssert(m_pDataMember != NULL); }
    00065
    00066    bool operator()(const T & t1, const T & t2) const
    00067    {
    00068       if (! m_pDataMember || ! t1.second || ! t2.second) { return false; }
    00069       QVariant v1 = m_pDataMember->toVariant(& (* t1.second));
    00070       QVariant v2 = m_pDataMember->toVariant(& (* t2.second));
    00071       return qx::model_view::compareQVariant(v1, v2, m_bAscendingOrder);
    00072    }
    00073
    00074 };
    00075
    00076 } // namespace model_view
    00077 } // namespace qx
    00078
    00079 #endif // _QX_MODEL_ROW_COMPARE_H_