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// -*- c++ -*-
/* $Id$ */
/* Copyright (C) 1998-2002 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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/class.h>
#include <glibmm/property.h>
#include <glibmm/ustring.h>
#include <glibmm/utility.h>
namespace Glib
{
void Class::register_derived_type(GType base_type)
{
return register_derived_type(base_type, 0);
}
void Class::register_derived_type(GType base_type, GTypeModule* module)
{
if(gtype_)
return; // already initialized
//0 is not a valid GType.
//It would lead to a crash later.
//We allow this, failing silently, to make life easier for gstreamermm.
if(base_type == 0)
return; // already initialized
GTypeQuery base_query = { 0, 0, 0, 0, };
g_type_query(base_type, &base_query);
//GTypeQuery::class_size is guint but GTypeInfo::class_size is guint16.
const guint16 class_size =
(guint16)base_query.class_size;
//GTypeQuery::instance_size is guint but GTypeInfo::instance_size is guint16.
const guint16 instance_size =
(guint16)base_query.instance_size;
const GTypeInfo derived_info =
{
class_size,
0, // base_init
0, // base_finalize
class_init_func_,
0, // class_finalize
0, // class_data
instance_size,
0, // n_preallocs
0, // instance_init
0, // value_table
};
if(!(base_query.type_name))
{
g_critical("Class::register_derived_type(): base_query.type_name is NULL.");
return;
}
gchar* derived_name = g_strconcat("gtkmm__", base_query.type_name, (void*)0);
if(module)
gtype_ = g_type_module_register_type(module, base_type, derived_name, &derived_info, GTypeFlags(0));
else
gtype_ = g_type_register_static(base_type, derived_name, &derived_info, GTypeFlags(0));
g_free(derived_name);
}
GType Class::clone_custom_type(const char* custom_type_name) const
{
std::string full_name ("gtkmm__CustomObject_");
Glib::append_canonical_typename(full_name, custom_type_name);
GType custom_type = g_type_from_name(full_name.c_str());
if(!custom_type)
{
g_return_val_if_fail(gtype_ != 0, 0);
// Cloned custom types derive from the wrapper's parent type,
// so that g_type_class_peek_parent() works correctly.
const GType base_type = g_type_parent(gtype_);
GTypeQuery base_query = { 0, 0, 0, 0, };
g_type_query(base_type, &base_query);
//GTypeQuery::class_size is guint but GTypeInfo::class_size is guint16.
const guint16 class_size =
(guint16)base_query.class_size;
//GTypeQuery::instance_size is guint but GTypeInfo::instance_size is guint16.
const guint16 instance_size =
(guint16)base_query.instance_size;
const GTypeInfo derived_info =
{
class_size,
0, // base_init
0, // base_finalize
&Class::custom_class_init_function,
0, // class_finalize
this, // class_data
instance_size,
0, // n_preallocs
0, // instance_init
0, // value_table
};
custom_type = g_type_register_static(
base_type, full_name.c_str(), &derived_info, GTypeFlags(0));
}
return custom_type;
}
// static
void Class::custom_class_init_function(void* g_class, void* class_data)
{
// The class_data pointer is set to 'this' by clone_custom_type().
const Class *const self = static_cast<Class*>(class_data);
g_return_if_fail(self->class_init_func_ != 0);
// Call the wrapper's class_init_function() to redirect
// the vfunc and default signal handler callbacks.
(*self->class_init_func_)(g_class, 0);
GObjectClass *const gobject_class = static_cast<GObjectClass*>(g_class);
gobject_class->get_property = &Glib::custom_get_property_callback;
gobject_class->set_property = &Glib::custom_set_property_callback;
}
} // namespace Glib
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