QxModelRowCompare.h

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/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 Lionel Marty (contact@qxorm.com)
**
** This file is part of the QxOrm library
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** warranty. In no event will the authors be held liable for any
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#ifndef _QX_MODEL_ROW_COMPARE_H_
#define _QX_MODEL_ROW_COMPARE_H_

#ifdef _MSC_VER
#pragma once
#endif

#include <QxDataMember/IxDataMember.h>

namespace qx {
namespace model_view {

QX_DLL_EXPORT bool compareQVariant(const QVariant & v1, const QVariant & v2, bool bAscending) QX_USED;

template <typename T>
struct QxModelRowCompare
{

   bool m_bAscendingOrder;             
   qx::IxDataMember * m_pDataMember;   

   QxModelRowCompare(bool bAscendingOrder, qx::IxDataMember * pDataMember) : m_bAscendingOrder(bAscendingOrder), m_pDataMember(pDataMember) { qAssert(m_pDataMember != NULL); }

   bool operator()(const T & t1, const T & t2) const
   {
      if (! m_pDataMember || ! t1.second || ! t2.second) { return false; }
      QVariant v1 = m_pDataMember->toVariant(& (* t1.second));
      QVariant v2 = m_pDataMember->toVariant(& (* t2.second));
      return qx::model_view::compareQVariant(v1, v2, m_bAscendingOrder);
   }

};

} // namespace model_view
} // namespace qx

#endif // _QX_MODEL_ROW_COMPARE_H_