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- // -*- c++ -*-
- #ifndef _GLIBMM_OBJECT_H
- #define _GLIBMM_OBJECT_H
- /* $Id: object.h,v 1.10 2005/01/21 19:26:04 murrayc Exp $ */
-
- /* Copyright 2002 The gtkmm Development Team
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #include <glibmm/objectbase.h>
- #include <glibmm/wrap.h>
- #include <glibmm/quark.h>
- #include <glibmm/refptr.h>
- #include <glibmm/utility.h> /* Could be private, but that would be tedious. */
- #include <glibmm/containerhandle_shared.h> //Because its specializations may be here.
- #include <glibmm/value.h>
-
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
- extern "C"
- {
- typedef struct _GObject GObject;
- typedef struct _GObjectClass GObjectClass;
- }
- #endif /* DOXYGEN_SHOULD_SKIP_THIS */
-
-
- namespace Glib
- {
-
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
-
- class Class;
- class Object_Class;
- class GSigConnectionNode;
-
- /* ConstructParams::ConstructParams() takes a varargs list of properties
- * and values, like g_object_new() does. This list will then be converted
- * to a GParameter array, for use with g_object_newv(). No overhead is
- * involved, since g_object_new() is just a wrapper around g_object_newv()
- * as well.
- *
- * The advantage of an auxilary ConstructParams object over g_object_new()
- * is that the actual construction is always done in the Glib::Object ctor.
- * This allows for neat tricks like easy creation of derived custom types,
- * without adding special support to each ctor of every class.
- *
- * The comments in object.cc and objectbase.cc should explain in detail
- * how this works.
- */
- class ConstructParams
- {
- public:
- const Glib::Class& glibmm_class;
- unsigned int n_parameters;
- GParameter* parameters;
-
- explicit ConstructParams(const Glib::Class& glibmm_class_);
- ConstructParams(const Glib::Class& glibmm_class_, const char* first_property_name, ...);
- ~ConstructParams();
-
- // This is only used by the C++ compiler (since g++ 3.4) to create temporary instances.
- // Apparently the compiler will actually optimize away the use of this.
- // See bug #132300.
- ConstructParams(const ConstructParams& other);
-
- private:
- // noncopyable
- ConstructParams& operator=(const ConstructParams&);
- };
-
- #endif /* DOXYGEN_SHOULD_SKIP_THIS */
-
-
- class Object : virtual public ObjectBase
- {
- public:
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
- typedef Object CppObjectType;
- typedef Object_Class CppClassType;
- typedef GObject BaseObjectType;
- typedef GObjectClass BaseClassType;
- #endif /* DOXYGEN_SHOULD_SKIP_THIS */
-
- protected:
- Object(); //For use by C++-only sub-types.
- explicit Object(const Glib::ConstructParams& construct_params);
- explicit Object(GObject* castitem);
- virtual ~Object(); //It should only be deleted by the callback.
-
- public:
- //static RefPtr<Object> create(); //You must reimplement this in each derived class.
-
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
- static GType get_type() G_GNUC_CONST;
- static GType get_base_type() G_GNUC_CONST;
- #endif
-
- //GObject* gobj_copy(); //Give a ref-ed copy to someone. Use for direct struct access.
-
- // Glib::Objects contain a list<Quark, pair<void*, DestroyNotify> >
- // to store run time data added to the object at run time.
- //TODO: Use slots instead:
- void* get_data(const QueryQuark &key);
- void set_data(const Quark &key, void* data);
- typedef void (*DestroyNotify) (gpointer data);
- void set_data(const Quark &key, void* data, DestroyNotify notify);
- void remove_data(const QueryQuark& quark);
- // same as remove without notifying
- void* steal_data(const QueryQuark& quark);
-
- // convenience functions
- //template <class T>
- //void set_data_typed(const Quark& quark, const T& data)
- // { set_data(quark, new T(data), delete_typed<T>); }
-
- //template <class T>
- //T& get_data_typed(const QueryQuark& quark)
- // { return *static_cast<T*>(get_data(quark)); }
-
- #ifndef DOXYGEN_SHOULD_SKIP_THIS
-
- private:
- friend class Glib::Object_Class;
- static CppClassType object_class_;
-
- // noncopyable
- Object(const Object&);
- Object& operator=(const Object&);
-
- #endif /* DOXYGEN_SHOULD_SKIP_THIS */
-
- // Glib::Object can not be dynamic because it lacks a float state.
- //virtual void set_manage();
- };
-
-
- //For some (proably, more spec-compliant) compilers, these specializations must
- //be next to the objects that they use.
- #ifndef GLIBMM_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION
- #ifndef DOXYGEN_SHOULD_SKIP_THIS /* hide the specializations */
-
- namespace Container_Helpers
- {
-
- /** Partial specialization for pointers to GObject instances.
- * @ingroup ContHelpers
- * The C++ type is always a Glib::RefPtr<>.
- */
- template <class T>
- struct TypeTraits< Glib::RefPtr<T> >
- {
- typedef Glib::RefPtr<T> CppType;
- typedef typename T::BaseObjectType * CType;
- typedef typename T::BaseObjectType * CTypeNonConst;
-
- static CType to_c_type (const CppType& ptr) { return Glib::unwrap(ptr); }
- static CType to_c_type (CType ptr) { return ptr; }
- static CppType to_cpp_type (CType ptr)
- {
- //return Glib::wrap(ptr, true);
-
- //We copy/paste the wrap() implementation here,
- //because we can not use a specific Glib::wrap(CType) overload here,
- //because that would be "dependent", and g++ 3.4 does not allow that.
- //The specific Glib::wrap() overloads don't do anything special anyway.
- GObject* cobj = (GObject*)const_cast<CTypeNonConst>(ptr);
- return Glib::RefPtr<T>( dynamic_cast<T*>(Glib::wrap_auto(cobj, true /* take_copy */)) );
- //We use dynamic_cast<> in case of multiple inheritance.
- }
-
- static void release_c_type (CType ptr)
- {
- GLIBMM_DEBUG_UNREFERENCE(0, ptr);
- g_object_unref(ptr);
- }
- };
-
- //This confuse the SUN Forte compiler, so we ifdef it out:
- #ifdef GLIBMM_HAVE_DISAMBIGUOUS_CONST_TEMPLATE_SPECIALIZATIONS
-
- /** Partial specialization for pointers to const GObject instances.
- * @ingroup ContHelpers
- * The C++ type is always a Glib::RefPtr<>.
- */
- template <class T>
- struct TypeTraits< Glib::RefPtr<const T> >
- {
- typedef Glib::RefPtr<const T> CppType;
- typedef const typename T::BaseObjectType * CType;
- typedef typename T::BaseObjectType * CTypeNonConst;
-
- static CType to_c_type (const CppType& ptr) { return Glib::unwrap(ptr); }
- static CType to_c_type (CType ptr) { return ptr; }
- static CppType to_cpp_type (CType ptr)
- {
- //return Glib::wrap(ptr, true);
-
- //We copy/paste the wrap() implementation here,
- //because we can not use a specific Glib::wrap(CType) overload here,
- //because that would be "dependent", and g++ 3.4 does not allow that.
- //The specific Glib::wrap() overloads don't do anything special anyway.
- GObject* cobj = (GObject*)(ptr);
- return Glib::RefPtr<const T>( dynamic_cast<const T*>(Glib::wrap_auto(cobj, true /* take_copy */)) );
- //We use dynamic_cast<> in case of multiple inheritance.
- }
-
- static void release_c_type (CType ptr)
- {
- GLIBMM_DEBUG_UNREFERENCE(0, ptr);
- g_object_unref(const_cast<CTypeNonConst>(ptr));
- }
- };
-
- #endif //GLIBMM_HAVE_DISAMBIGUOUS_CONST_TEMPLATE_SPECIALIZATIONS
-
- } //namespace Container_Helpers
-
-
- template <class T, class PtrT> inline
- PtrT Value_Pointer<T,PtrT>::get_(Glib::Object*) const
- {
- return dynamic_cast<T*>(get_object());
- }
-
-
- /** Partial specialization for RefPtr<> to Glib::Object.
- * @ingroup glibmmValue
- */
- template <class T>
- class Value< Glib::RefPtr<T> > : public ValueBase_Object
- {
- public:
- typedef Glib::RefPtr<T> CppType;
- typedef typename T::BaseObjectType* CType;
-
- static GType value_type() { return T::get_base_type(); }
-
- void set(const CppType& data) { set_object(data.operator->()); }
- CppType get() const { return Glib::RefPtr<T>::cast_dynamic(get_object_copy()); }
- };
-
- //The SUN Forte Compiler has a problem with this:
- #ifdef GLIBMM_HAVE_DISAMBIGUOUS_CONST_TEMPLATE_SPECIALIZATIONS
-
- /** Partial specialization for RefPtr<> to const Glib::Object.
- * @ingroup glibmmValue
- */
- template <class T>
- class Value< Glib::RefPtr<const T> > : public ValueBase_Object
- {
- public:
- typedef Glib::RefPtr<const T> CppType;
- typedef typename T::BaseObjectType* CType;
-
- static GType value_type() { return T::get_base_type(); }
-
- void set(const CppType& data) { set_object(const_cast<T*>(data.operator->())); }
- CppType get() const { return Glib::RefPtr<T>::cast_dynamic(get_object_copy()); }
- };
- #endif //GLIBMM_HAVE_DISAMBIGUOUS_CONST_TEMPLATE_SPECIALIZATIONS
-
-
- #endif //DOXYGEN_SHOULD_SKIP_THIS
- #endif //GLIBMM_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION
-
- } // namespace Glib
-
- #endif /* _GLIBMM_OBJECT_H */
-
-