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QxNestedModel.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_NESTED_MODEL_H_
    00033 #define _QX_NESTED_MODEL_H_
    00034
    00035 #ifdef _MSC_VER
    00036 #pragma once
    00037 #endif
    00038
    00046 #include <QxConvert/QxConvert.h>
    00047
    00048 #include <QxCollection/QxCollection.h>
    00049
    00050 #include <QxTraits/is_qx_registered.h>
    00051 #include <QxTraits/is_container.h>
    00052 #include <QxTraits/is_smart_ptr.h>
    00053 #include <QxTraits/get_base_class.h>
    00054 #include <QxTraits/get_class_name_primitive.h>
    00055 #include <QxTraits/construct_ptr.h>
    00056 #include <QxTraits/generic_container.h>
    00057 #include <QxTraits/is_valid_primary_key.h>
    00058
    00059 #include <QxSerialize/QxClone.h>
    00060
    00061 #include <QxModelView/IxModel.h>
    00062 #include <QxModelView/QxModel.h>
    00063
    00064 namespace qx {
    00065 namespace model_view {
    00066
    00067 template <class T>
    00068 qx::IxModel * create_nested_model(qx::IxModel * pParent, const QModelIndex & idxParent, T & t);
    00069
    00070 template <class T, class M>
    00071 qx::IxModel * create_nested_model_with_type(qx::IxModel * pParent, const QModelIndex & idxParent, T & t, M * pModelType);
    00072
    00073 template <class T>
    00074 void sync_nested_model(qx::IxModel * pModel, T & t);
    00075
    00076 } // namespace model_view
    00077 } // namespace qx
    00078
    00079 namespace qx {
    00080 namespace model_view {
    00081 namespace detail {
    00082
    00083 template <class T, class M /* = void */>
    00084 struct QxNestedModel;
    00085
    00086 template <class T, bool bIsQObject /* = false */>
    00087 struct QxNestedModel_Helper
    00088 {
    00089
    00090    static std::shared_ptr<T> clone(T & t)
    00091    { std::shared_ptr<T> p = std::make_shared<T>(); (* p) = t; return p; }
    00092
    00093    static void synchronize(T & t1, T & t2)
    00094    { t1 = t2; }
    00095
    00096 };
    00097
    00098 template <class T>
    00099 struct QxNestedModel_Helper<T, true>
    00100 {
    00101
    00102    static std::shared_ptr<T> clone(T & t)
    00103    { std::shared_ptr<T> p; p.reset(qx::clone_to_nude_ptr(t)); qAssert(p); return p; }
    00104
    00105    static void synchronize(T & t1, T & t2)
    00106    {
    00107       qx::IxClass * pClass = qx::QxClass<T>::getSingleton();
    00108       qx::IxDataMemberX * pDataMemberX = (pClass ? pClass->getDataMemberX() : NULL);
    00109       for (long l = 0; (pDataMemberX && (l < pDataMemberX->count_WithDaoStrategy())); l++)
    00110       {
    00111          qx::IxDataMember * pDataMember = pDataMemberX->get_WithDaoStrategy(l); if (! pDataMember) { continue; }
    00112          QVariant value = pDataMember->toVariant(& t2);
    00113          pDataMember->fromVariant((& t1), value);
    00114       }
    00115    }
    00116
    00117 };
    00118
    00119 template <class T, class M, bool bIsTypeVoid /* = false */>
    00120 struct QxNestedModel_Creator
    00121 { static qx::IxModel * newModel(qx::IxModel * pParent) { return new M(pParent); } };
    00122
    00123 template <class T, class M>
    00124 struct QxNestedModel_Creator<T, M, true>
    00125 { static qx::IxModel * newModel(qx::IxModel * pParent) { return new qx::QxModel<T>(pParent); } };
    00126
    00127 template <class T, class M /* = void */>
    00128 struct QxNestedModel_Generic
    00129 {
    00130
    00131    typedef typename qx::QxModel<T>::type_collection type_collection;
    00132    typedef typename qx::QxModel<T>::type_primary_key type_primary_key;
    00133    typedef typename qx::QxModel<T>::type_ptr type_ptr;
    00134
    00135    enum { is_valid = qx::trait::is_qx_registered<T>::value };
    00136
    00137    static inline qx::IxModel * create(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00138    {
    00139       static_assert(is_valid, "is_valid");
    00140       qx::IxModel * pModel = qx::model_view::detail::QxNestedModel_Creator<T, M, std::is_same<M, void>::value>::newModel(pParent);
    00141       pModel->setParentModel(pParent);
    00142       type_collection * pListOfItems = static_cast<type_collection *>(pModel->getCollection());
    00143       long & idx = pModel->m_lManualInsertIndex;
    00144       type_primary_key key;
    00145
    00146       pModel->beginInsertRows(idxParent, 0, 0);
    00147       type_ptr ptr = qx::model_view::detail::QxNestedModel_Helper<T, std::is_base_of<QObject, T>::value>::clone(t);
    00148       qx::IxDataMember * pDataMemberId = pModel->m_pDataMemberId;
    00149       if (! pDataMemberId) { qAssert(false); pModel->endInsertRows(); return pModel; }
    00150       QVariant value = pDataMemberId->toVariant(& t);
    00151       if (! qx::trait::is_valid_primary_key(value))
    00152       { idx--; value = QVariant(static_cast<qlonglong>(idx)); }
    00153       qx::cvt::from_variant(value, key);
    00154       pListOfItems->insert(0, key, ptr);
    00155       pModel->endInsertRows();
    00156       return pModel;
    00157    }
    00158
    00159    static inline void synchronize(qx::IxModel * pModel, T & t)
    00160    {
    00161       if (! pModel) { qAssert(false); return; }
    00162       type_collection * pListOfItems = static_cast<type_collection *>(pModel->getCollection());
    00163       if (! pListOfItems || (pListOfItems->count() <= 0)) { return; }
    00164       type_ptr ptr = pListOfItems->getByIndex(0); if (! ptr) { return; }
    00165       qx::model_view::detail::QxNestedModel_Helper<T, std::is_base_of<QObject, T>::value>::synchronize(t, (* ptr));
    00166    }
    00167
    00168 };
    00169
    00170 template <class T, class M /* = void */>
    00171 struct QxNestedModel_Container
    00172 {
    00173
    00174    typedef qx::trait::generic_container<T> type_generic_container;
    00175    typedef typename type_generic_container::type_value_qx type_data;
    00176    typedef typename type_generic_container::type_item type_item;
    00177    typedef typename qx::QxModel<type_data>::type_collection type_collection;
    00178    typedef typename qx::QxModel<type_data>::type_primary_key type_primary_key;
    00179    typedef typename qx::QxModel<type_data>::type_ptr type_ptr;
    00180
    00181    enum { is_valid = qx::trait::is_qx_registered<type_data>::value };
    00182
    00183    static inline qx::IxModel * create(qx::IxModel * pParent, const QModelIndex & idxParent, T & t)
    00184    {
    00185       int iCurrRow = 0;
    00186       static_assert(is_valid, "is_valid");
    00187       qx::IxModel * pModel = qx::model_view::detail::QxNestedModel_Creator<type_data, M, std::is_same<M, void>::value>::newModel(pParent);
    00188       pModel->setParentModel(pParent);
    00189       long lCount = static_cast<long>(type_generic_container::size(t));
    00190       if (lCount <= 0) { return pModel; }
    00191
    00192       pModel->beginInsertRows(idxParent, 0, (lCount - 1));
    00193       for (typename T::iterator it = t.begin(); it != t.end(); ++it)
    00194       { insertItem(pModel, (* it), iCurrRow); iCurrRow++; }
    00195       pModel->endInsertRows();
    00196       return pModel;
    00197    }
    00198
    00199    template <typename U>
    00200    static inline bool insert(qx::IxModel * pModel, U & item, int iRow)
    00201    {
    00202       if (! pModel) { qAssert(false); return false; }
    00203       type_collection * pListOfItems = static_cast<type_collection *>(pModel->getCollection());
    00204       long & idx = pModel->m_lManualInsertIndex;
    00205       type_primary_key key;
    00206
    00207       type_ptr ptr = qx::model_view::detail::QxNestedModel_Helper<U, std::is_base_of<QObject, U>::value>::clone(item);
    00208       qx::IxDataMember * pDataMemberId = pModel->m_pDataMemberId;
    00209       if (! pDataMemberId) { qAssert(false); return false; }
    00210       QVariant value = pDataMemberId->toVariant(& item);
    00211       if (! qx::trait::is_valid_primary_key(value))
    00212       { idx--; value = QVariant(static_cast<qlonglong>(idx)); }
    00213       qx::cvt::from_variant(value, key);
    00214       pListOfItems->insert(iRow, key, ptr);
    00215       return true;
    00216    }
    00217
    00218    static inline void synchronize(qx::IxModel * pModel, T & t)
    00219    {
    00220       if (! pModel) { qAssert(false); return; }
    00221       type_generic_container::clear(t);
    00222       type_collection * pListOfItems = static_cast<type_collection *>(pModel->getCollection());
    00223
    00224       for (long l = 0; l < pListOfItems->count(); l++)
    00225       {
    00226          type_ptr ptr = pListOfItems->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, std::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, std::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, M>::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, M>::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, M>::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, M>::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, M>::insertItem(pModel, item.second, iRow); }
    00275    };
    00276
    00277    template <typename U>
    00278    struct insertItem_Helper<U, false>
    00279    {
    00280       enum { is_same_type = std::is_same<qx::model_view::detail::QxNestedModel_Container<T, M>::type_data, U>::value };
    00281       static bool insert(qx::IxModel * pModel, U & item, int iRow)
    00282       { static_assert(is_same_type, "is_same_type"); return qx::model_view::detail::QxNestedModel_Container<T, M>::insert(pModel, item, iRow); }
    00283    };
    00284
    00285 };
    00286
    00287 template <class T, class M /* = void */>
    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, M>::create(pParent, idxParent, u); }
    00302
    00303    static inline qx::IxModel * create_NullHelper(qx::IxModel * pParent, const QModelIndex & idxParent)
    00304    {
    00305       M * pModelType = NULL; Q_UNUSED(pModelType);
    00306       T t; qx::trait::construct_ptr<T>::get(t); if (! t) { qAssert(false); return NULL; }
    00307       qx::IxModel * pModel = qx::model_view::create_nested_model_with_type(pParent, idxParent, (* t), pModelType);
    00308       if (pModel) { pModel->clear(); } qAssert(pModel != NULL);
    00309       return pModel;
    00310    }
    00311
    00312 };
    00313
    00314 template <class T, class M /* = void */>
    00315 struct QxNestedModel
    00316 {
    00317
    00318    typedef typename std::conditional< std::is_pointer<T>::value, qx::model_view::detail::QxNestedModel_Ptr<T, M>, qx::model_view::detail::QxNestedModel_Generic<T, M> >::type type_model_view_1;
    00319    typedef typename std::conditional< qx::trait::is_smart_ptr<T>::value, qx::model_view::detail::QxNestedModel_Ptr<T, M>, type_model_view_1 >::type type_model_view_2;
    00320    typedef typename std::conditional< qx::trait::is_container<T>::value, qx::model_view::detail::QxNestedModel_Container<T, M>, 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, void>::create(pParent, idxParent, t); }
    00347
    00348 template <class T, class M>
    00349 qx::IxModel * create_nested_model_with_type(qx::IxModel * pParent, const QModelIndex & idxParent, T & t, M * pModelType)
    00350 { Q_UNUSED(pModelType); static_assert((std::is_base_of<qx::IxModel, M>::value || std::is_same<M, void>::value), "(std::is_base_of<qx::IxModel, M>::value || std::is_same<M, void>::value)"); return qx::model_view::detail::QxNestedModel<T, M>::create(pParent, idxParent, t); }
    00351
    00352 template <class T>
    00353 void sync_nested_model(qx::IxModel * pModel, T & t)
    00354 { qx::model_view::detail::QxNestedModel<T, void>::synchronize(pModel, t); }
    00355
    00356 } // namespace model_view
    00357 } // namespace qx
    00358
    00359 #endif // _QX_NESTED_MODEL_H_