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QxNestedModel.h
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    00001 /****************************************************************************
    00002 **
    00003 ** http://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_NESTED_MODEL_H_
    00033 #define _QX_NESTED_MODEL_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <boost/static_assert.hpp>
    00047 #include <boost/mpl/if.hpp>
    00048 #include <boost/mpl/logical.hpp>
    00049 #include <boost/type_traits/is_pointer.hpp>
    00050 #include <boost/type_traits/is_same.hpp>
    00051 #include <boost/type_traits/is_base_of.hpp>
    00052
    00053 #include <QxConvert/QxConvert.h>
    00054
    00055 #include <QxCollection/QxCollection.h>
    00056
    00057 #include <QxTraits/is_qx_registered.h>
    00058 #include <QxTraits/is_container.h>
    00059 #include <QxTraits/is_smart_ptr.h>
    00060 #include <QxTraits/get_base_class.h>
    00061 #include <QxTraits/get_class_name_primitive.h>
    00062 #include <QxTraits/construct_ptr.h>
    00063 #include <QxTraits/generic_container.h>
    00064 #include <QxTraits/is_valid_primary_key.h>
    00065
    00066 #include <QxSerialize/QxClone.h>
    00067
    00068 #include <QxModelView/IxModel.h>
    00069 #include <QxModelView/QxModel.h>
    00070
    00071 namespace qx {
    00072 namespace model_view {
    00073
    00074 template <class T>
    00075 qx::IxModel * create_nested_model(qx::IxModel * pParent, const QModelIndex & idxParent, T & t);
    00076
    00077 template <class T>
    00078 void sync_nested_model(qx::IxModel * pModel, T & t);
    00079
    00080 } // namespace model_view
    00081 } // namespace qx
    00082
    00083 namespace qx {
    00084 namespace model_view {
    00085 namespace detail {
    00086
    00087 template <class T>
    00088 struct QxNestedModel;
    00089
    00090 template <class T, bool bIsQObject /* = false */>
    00091 struct QxNestedModel_Helper
    00092 {
    00093
    00094    static qx_shared_ptr<T> clone(T & t)
    00095    { qx_shared_ptr<T> p; p.reset(new T()); (* p) = t; return p; }
    00096
    00097    static void synchronize(T & t1, T & t2)
    00098    { t1 = t2; }
    00099
    00100 };
    00101
    00102 template <class T>
    00103 struct QxNestedModel_Helper<T, true>
    00104 {
    00105
    00106    static qx_shared_ptr<T> clone(T & t)
    00107    { qx_shared_ptr<T> p; p.reset(qx::clone_to_nude_ptr(t)); qAssert(p); return p; }
    00108
    00109    static void synchronize(T & t1, T & t2)
    00110    {
    00111       qx::IxClass * pClass = qx::QxClass<T>::getSingleton();
    00112       qx::IxDataMemberX * pDataMemberX = (pClass ? pClass->getDataMemberX() : NULL);
    00113       for (long l = 0; (pDataMemberX && (l < pDataMemberX->count_WithDaoStrategy())); l++)
    00114       {
    00115          qx::IxDataMember * pDataMember = pDataMemberX->get_WithDaoStrategy(l); if (! pDataMember) { continue; }
    00116          QVariant value = pDataMember->toVariant(& t2);
    00117          pDataMember->fromVariant((& t1), value);
    00118       }
    00119    }
    00120
    00121 };
    00122
    00123 template <class T>
    00124 struct QxNestedModel_Generic
    00125 {
    00126
    00127    typedef typename qx::QxModel<T>::type_collection type_collection;
    00128    typedef typename qx::QxModel<T>::type_primary_key type_primary_key;
    00129    typedef typename qx::QxModel<T>::type_ptr type_ptr;
    00130
    00131    enum { is_valid = qx::trait::is_qx_registered<T>::value };
    00132
    00133    static inline qx::IxModel * create(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00134    {
    00135       BOOST_STATIC_ASSERT(is_valid);
    00136       qx::QxModel<T> * pModel = new qx::QxModel<T>(pParent);
    00137       pModel->setParentModel(pParent);
    00138       type_collection & model = pModel->m_model;
    00139       long & idx = pModel->m_lManualInsertIndex;
    00140       type_primary_key key;
    00141
    00142       pModel->beginInsertRows(idxParent, 0, 0);
    00143       type_ptr ptr = qx::model_view::detail::QxNestedModel_Helper<T, boost::is_base_of<QObject, T>::value>::clone(t);
    00144       qx::IxDataMember * pDataMemberId = pModel->m_pDataMemberId;
    00145       if (! pDataMemberId) { qAssert(false); pModel->endInsertRows(); return pModel; }
    00146       QVariant value = pDataMemberId->toVariant(& t);
    00147       if (! qx::trait::is_valid_primary_key(value))
    00148       { idx--; value = QVariant(static_cast<qlonglong>(idx)); }
    00149       qx::cvt::from_variant(value, key);
    00150       model.insert(0, key, ptr);
    00151       pModel->endInsertRows();
    00152       return pModel;
    00153    }
    00154
    00155    static inline void synchronize(qx::IxModel * pModel, T & t)
    00156    {
    00157       if (! pModel) { qAssert(false); return; }
    00158       qx::QxModel<T> * pModelTyped = static_cast<qx::QxModel<T> *>(pModel);
    00159       type_collection & model = pModelTyped->m_model;
    00160       if (model.count() <= 0) { return; }
    00161       type_ptr ptr = model.getByIndex(0);
    00162       if (! ptr) { return; }
    00163       qx::model_view::detail::QxNestedModel_Helper<T, boost::is_base_of<QObject, T>::value>::synchronize(t, (* ptr));
    00164    }
    00165
    00166 };
    00167
    00168 template <class T>
    00169 struct QxNestedModel_Container
    00170 {
    00171
    00172    typedef qx::trait::generic_container<T> type_generic_container;
    00173    typedef typename type_generic_container::type_value_qx type_data;
    00174    typedef typename type_generic_container::type_item type_item;
    00175    typedef typename qx::QxModel<type_data>::type_collection type_collection;
    00176    typedef typename qx::QxModel<type_data>::type_primary_key type_primary_key;
    00177    typedef typename qx::QxModel<type_data>::type_ptr type_ptr;
    00178
    00179    enum { is_valid = qx::trait::is_qx_registered<type_data>::value };
    00180
    00181    static inline qx::IxModel * create(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00182    {
    00183       int iCurrRow = 0;
    00184       BOOST_STATIC_ASSERT(is_valid);
    00185       qx::QxModel<type_data> * pModel = new qx::QxModel<type_data>(pParent);
    00186       pModel->setParentModel(pParent);
    00187       long lCount = static_cast<long>(type_generic_container::size(t));
    00188       if (lCount <= 0) { return pModel; }
    00189
    00190       pModel->beginInsertRows(idxParent, 0, (lCount - 1));
    00191       for (typename T::iterator it = t.begin(); it != t.end(); ++it)
    00192       { insertItem(pModel, (* it), iCurrRow); iCurrRow++; }
    00193       pModel->endInsertRows();
    00194       return pModel;
    00195    }
    00196
    00197    template <typename U>
    00198    static inline bool insert(qx::IxModel * pModel, U & item, int iRow)
    00199    {
    00200       if (! pModel) { qAssert(false); return false; }
    00201       qx::QxModel<U> * pModelWrk = static_cast<qx::QxModel<U> *>(pModel);
    00202       type_collection & model = pModelWrk->m_model;
    00203       long & idx = pModelWrk->m_lManualInsertIndex;
    00204       type_primary_key key;
    00205
    00206       type_ptr ptr = qx::model_view::detail::QxNestedModel_Helper<U, boost::is_base_of<QObject, U>::value>::clone(item);
    00207       qx::IxDataMember * pDataMemberId = pModelWrk->m_pDataMemberId;
    00208       if (! pDataMemberId) { qAssert(false); return false; }
    00209       QVariant value = pDataMemberId->toVariant(& item);
    00210       if (! qx::trait::is_valid_primary_key(value))
    00211       { idx--; value = QVariant(static_cast<qlonglong>(idx)); }
    00212       qx::cvt::from_variant(value, key);
    00213       model.insert(iRow, key, ptr);
    00214       return true;
    00215    }
    00216
    00217    static inline void synchronize(qx::IxModel * pModel, T & t)
    00218    {
    00219       if (! pModel) { qAssert(false); return; }
    00220       type_generic_container::clear(t);
    00221       qx::QxModel<type_data> * pModelTyped = static_cast<qx::QxModel<type_data> *>(pModel);
    00222       type_collection & model = pModelTyped->m_model;
    00223
    00224       for (long l = 0; l < model.count(); l++)
    00225       {
    00226          type_ptr ptr = model.getByIndex(l); if (! ptr) { continue; }
    00227          type_item item = type_generic_container::createItem();
    00228          type_data & item_val = item.value_qx();
    00229          qx::model_view::detail::QxNestedModel_Helper<type_data, boost::is_base_of<QObject, type_data>::value>::synchronize(item_val, (* ptr));
    00230          QVariant vKey = QVariant(static_cast<qlonglong>(l));
    00231          qx::cvt::from_variant(vKey, item.key());
    00232          type_generic_container::insertItem(t, item);
    00233       }
    00234    }
    00235
    00236 private:
    00237
    00238    template <typename U>
    00239    static inline bool insertItem(qx::IxModel * pModel, U & item, int iRow)
    00240    { return insertItem_Helper<U, boost::is_pointer<U>::value || qx::trait::is_smart_ptr<U>::value>::insert(pModel, item, iRow); }
    00241
    00242    template <typename U, bool bIsPointer /* = true */>
    00243    struct insertItem_Helper
    00244    {
    00245       static inline bool insert(qx::IxModel * pModel, U & item, int iRow)
    00246       { return (item ? qx::model_view::detail::QxNestedModel_Container<T>::insertItem(pModel, (* item), iRow) : true); }
    00247    };
    00248
    00249    template <typename U1, typename U2>
    00250    struct insertItem_Helper<std::pair<U1, U2>, false>
    00251    {
    00252       static inline bool insert(qx::IxModel * pModel, std::pair<U1, U2> & item, int iRow)
    00253       { return qx::model_view::detail::QxNestedModel_Container<T>::insertItem(pModel, item.second, iRow); }
    00254    };
    00255
    00256    template <typename U1, typename U2>
    00257    struct insertItem_Helper<const std::pair<U1, U2>, false>
    00258    {
    00259       static inline bool insert(qx::IxModel * pModel, const std::pair<U1, U2> & item, int iRow)
    00260       { return qx::model_view::detail::QxNestedModel_Container<T>::insertItem(pModel, item.second, iRow); }
    00261    };
    00262
    00263    template <typename U1, typename U2>
    00264    struct insertItem_Helper<QPair<U1, U2>, false>
    00265    {
    00266       static inline bool insert(qx::IxModel * pModel, QPair<U1, U2> & item, int iRow)
    00267       { return qx::model_view::detail::QxNestedModel_Container<T>::insertItem(pModel, item.second, iRow); }
    00268    };
    00269
    00270    template <typename U1, typename U2>
    00271    struct insertItem_Helper<const QPair<U1, U2>, false>
    00272    {
    00273       static inline bool insert(qx::IxModel * pModel, const QPair<U1, U2> & item, int iRow)
    00274       { return qx::model_view::detail::QxNestedModel_Container<T>::insertItem(pModel, item.second, iRow); }
    00275    };
    00276
    00277    template <typename U>
    00278    struct insertItem_Helper<U, false>
    00279    {
    00280       enum { is_same_type = boost::is_same<qx::model_view::detail::QxNestedModel_Container<T>::type_data, U>::value };
    00281       static bool insert(qx::IxModel * pModel, U & item, int iRow)
    00282       { BOOST_STATIC_ASSERT(is_same_type); return qx::model_view::detail::QxNestedModel_Container<T>::insert(pModel, item, iRow); }
    00283    };
    00284
    00285 };
    00286
    00287 template <class T>
    00288 struct QxNestedModel_Ptr
    00289 {
    00290
    00291    static inline qx::IxModel * create(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00292    { return (t ? create_Helper(pParent, idxParent, (* t)) : create_NullHelper(pParent, idxParent)); }
    00293
    00294    static inline void synchronize(qx::IxModel * pModel, T & t)
    00295    { if (! t) { qx::trait::construct_ptr<T>::get(t); }; if (t) { qx::model_view::sync_nested_model(pModel, (* t)); } }
    00296
    00297 private:
    00298
    00299    template <class U>
    00300    static inline qx::IxModel * create_Helper(qx::IxModel * pParent, const QModelIndex & idxParent, U & u)
    00301    { return qx::model_view::detail::QxNestedModel<U>::create(pParent, idxParent, u); }
    00302
    00303    static inline qx::IxModel * create_NullHelper(qx::IxModel * pParent, const QModelIndex & idxParent)
    00304    {
    00305       T t; qx::trait::construct_ptr<T>::get(t);
    00306       if (! t) { qAssert(false); return NULL; }
    00307       qx::IxModel * pModel = qx::model_view::create_nested_model(pParent, idxParent, (* t));
    00308       if (pModel) { pModel->clear(); } qAssert(pModel != NULL);
    00309       return pModel;
    00310    }
    00311
    00312 };
    00313
    00314 template <class T>
    00315 struct QxNestedModel
    00316 {
    00317
    00318    typedef typename boost::mpl::if_c< boost::is_pointer<T>::value, qx::model_view::detail::QxNestedModel_Ptr<T>, qx::model_view::detail::QxNestedModel_Generic<T> >::type type_model_view_1;
    00319    typedef typename boost::mpl::if_c< qx::trait::is_smart_ptr<T>::value, qx::model_view::detail::QxNestedModel_Ptr<T>, type_model_view_1 >::type type_model_view_2;
    00320    typedef typename boost::mpl::if_c< qx::trait::is_container<T>::value, qx::model_view::detail::QxNestedModel_Container<T>, type_model_view_2 >::type type_model_view_3;
    00321
    00322    static inline qx::IxModel * create(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00323    { return type_model_view_3::create(pParent, idxParent, t); }
    00324
    00325    static inline void synchronize(qx::IxModel * pModel, T & t)
    00326    { type_model_view_3::synchronize(pModel, t); }
    00327
    00328 };
    00329
    00330 } // namespace detail
    00331 } // namespace model_view
    00332 } // namespace qx
    00333
    00334 namespace qx {
    00335 namespace model_view {
    00336
    00344 template <class T>
    00345 qx::IxModel * create_nested_model(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00346 { return qx::model_view::detail::QxNestedModel<T>::create(pParent, idxParent, t); }
    00347
    00348 template <class T, class U>
    00349 qx::IxModel * create_nested_model_with_type(qx::IxModel * pParent, const QModelIndex & idxParent, T & t, U * dummy)
    00350 {
    00351    Q_UNUSED(dummy);
    00352    BOOST_STATIC_ASSERT((boost::is_base_of<qx::IxModel, U>::value));
    00353    qx::IxModel * pModel = qx::model_view::create_nested_model(pParent, idxParent, t);
    00354    if (! pModel) { return NULL; }
    00355    U * pOther = new U(pModel, pParent);
    00356    delete pModel;
    00357    return pOther;
    00358 }
    00359
    00360 template <class T>
    00361 void sync_nested_model(qx::IxModel * pModel, T & t)
    00362 { qx::model_view::detail::QxNestedModel<T>::synchronize(pModel, t); }
    00363
    00364 } // namespace model_view
    00365 } // namespace qx
    00366
    00367 #endif // _QX_NESTED_MODEL_H_