431 lines
14 KiB
C++
431 lines
14 KiB
C++
// Generated by gtkmmproc -- DO NOT MODIFY!
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#include <gtkmm/object.h>
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#include <gtkmm/private/object_p.h>
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/* $Id$ */
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/* Copyright 1998-2002 The gtkmm Development Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <glibmm/quark.h>
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#include <gtk/gtkobject.h>
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namespace Gtk
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{
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Object::Object(const Glib::ConstructParams& construct_params)
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:
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Glib::Object(construct_params)
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{
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gobject_disposed_ = false;
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_init_unmanage(); //We don't like the GTK+ default memory management - we want to be in control._)
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}
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Object::Object(GtkObject* castitem)
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:
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Glib::Object((GObject*) castitem)
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{
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gobject_disposed_ = false;
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_init_unmanage(); //We don't like the GTK+ default memory management - we want to be in control.
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}
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void Object::_init_unmanage(bool /* is_toplevel = false */)
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{
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//GTKMM_LIFECYCLE
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if(gobject_)
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{
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//Glib::Object::Object has already stored a pointer to this C++ instance in the underlying C instance,
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//and connected a callback which will, in turn, call our destroy_notify_(),
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//so will will know if GTK+ disposes of the underlying instance.
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// Most GTK+ objects are floating, by default. This means that the container widget controls their lifetime.
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// We'll change this:
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if(g_object_is_floating (gobject_)) //Top-level Windows and Dialogs can not be manag()ed, so there is no need to do this.
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{
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GLIBMM_DEBUG_REFERENCE(this, gobject_);
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g_object_ref_sink(gobject_); //Stops it from being floating - we will make this optional ( see Gtk::manage() ),
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("gtkmm after sink: C++ instance: %p, C instance: %p, refcount=%d\n", (void*)(Glib::ObjectBase*)this, (void*)gobject_, G_OBJECT(gobject_)->ref_count);
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g_warning(" c instance gtype: %s\n", G_OBJECT_TYPE_NAME(gobject_));
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#endif
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referenced_ = true; //Not managed.
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}
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else
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{
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//This widget is already not floating. It's probably already been added to a GTK+ container, and has just had Glib::wrap() called on it.
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//It's not floating because containers call g_object_sink() on child widgets to take control of them.
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//We just ref() it so that we can unref it later.
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//GLIBMM_DEBUG_REFERENCE(this, gobject_);
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//g_object_ref(gobject_);
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//Alternatively, it might be a top-level window (e.g. a Dialog). We would then be doing one too-many refs(),
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//We do an extra unref() in Window::_destroy_c_instance() to take care of that.
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referenced_ = false; //Managed. We should not try to unfloat GtkObjects that we did not instantiate.
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}
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}
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}
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void Object::_destroy_c_instance()
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{
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::_destroy_c_instance() this=%10X, gobject_=%10X\n", this, gobject_);
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if(gobject_)
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g_warning(" gtypename: %s\n", G_OBJECT_TYPE_NAME(gobject_));
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#endif
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cpp_destruction_in_progress_ = true;
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// remove our hook.
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GtkObject* object = gobj();
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if (object)
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{
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g_assert(GTK_IS_OBJECT(object));
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disconnect_cpp_wrapper();
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//Unfortunately this means that our dispose callback will not be called, because the qdata has been removed.
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//So we'll connect the callback again, just so that gobject_disposed_ gets set for use later in this same method.
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//See below:
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//This probably isn't a problem now:
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//If we are killing the C++ instance before the C instance, then this might lead to strange behaviour.
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//If this is a problem, then you'll have to use a managed() object, which will die only upon GTK+'s request.
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//We can't do anything with the gobject_ if it's already been disposed.
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//This prevents us from unref-ing it again, or destroying it again after GTK+ has told us that it has been disposed.
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if (!gobject_disposed_)
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{
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if(referenced_)
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{
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//It's not manage()ed so we just unref to destroy it
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("final unref: gtypename: %s, refcount: %d\n", G_OBJECT_TYPE_NAME(object), ((GObject*)object)->ref_count);
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#endif
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//Because we called disconnect_cpp_wrapper() our dispose callback will not be called, because the qdata has been removed.
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//So we'll connect a callback again, just so that gobject_disposed_ gets set for use later in this same method.
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gulong connection_id_destroy = g_signal_connect (object, "destroy", G_CALLBACK (&callback_destroy_), this);
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GLIBMM_DEBUG_UNREFERENCE(this, object);
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g_object_unref(object);
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if(!gobject_disposed_) //or if(g_signal_handler_is_connected(object, connection_id_destroy))
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g_signal_handler_disconnect(object, connection_id_destroy);
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//destroy_notify() should have been called after the final g_object_unref() or gtk_object_destroy(), so gobject_disposed_ should now be true.
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//If the C instance still isn't dead then insist, by calling gtk_object_destroy().
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//This is necessary because even a manage()d widget is refed when added to a container.
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// <danielk> That's simply not true. But references might be taken elsewhere,
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// and gtk_object_destroy() just tells everyone "drop your refs, please!".
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if (!gobject_disposed_)
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{
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::_destroy_c_instance(): Calling gtk_object_destroy(): gobject_=%10X, gtypename=%s\n", object, G_OBJECT_TYPE_NAME(object));
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#endif
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g_assert(GTK_IS_OBJECT(object));
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gtk_object_destroy(object); //Container widgets can respond to this.
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}
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}
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else
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{
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//It's manag()ed, but the coder decided to delete it before deleting its parent.
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//That should be OK because the Container can respond to that.
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::_destroy_c_instance(): Calling gtk_object_destroy(): gobject_=%10X\n", gobject_);
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#endif
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if (!gobject_disposed_)
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{
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g_assert(GTK_IS_OBJECT(object));
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gtk_object_destroy(object);
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}
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}
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}
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//Glib::Object::~Object() will not g_object_unref() it too. because gobject_ is now 0.
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}
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}
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Object::~Object()
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{
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::~Object() gobject_=%10X\n", gobject_);
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#endif
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//This has probably been called already from Gtk::Object::_destroy(), which is called from derived destructors.
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_destroy_c_instance();
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}
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void Object::disconnect_cpp_wrapper()
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{
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//GTKMM_LIFECYCLE:
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::disconnect_cpp_wrapper() this=%10X, gobject_=%10X\n", this, gobject_);
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if(gobject_)
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g_warning(" gtypename: %s\n", G_OBJECT_TYPE_NAME(gobject_));
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#endif
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if(gobj())
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{
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//Prevent gtk vfuncs and default signal handlers from calling our instance methods:
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g_object_steal_qdata((GObject*)gobj(), Glib::quark_); //It will no longer be possible to get the C++ instance from the C instance.
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//Allow us to prevent generation of a new C++ wrapper during destruction:
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g_object_set_qdata((GObject*)gobj(), Glib::quark_cpp_wrapper_deleted_, (gpointer)true);
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//Prevent C++ instance from using GTK+ object:
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gobject_ = 0;
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//TODO: Disconnect any signals, using gtk methods.
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//We'll have to keep a record of all the connections.
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}
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}
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void Object::destroy_notify_()
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{
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//Overriden.
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//GTKMM_LIFECYCLE
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::destroy_notify_: this=%10X, gobject_=%10X\n", this, gobject_);
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if(gobject_)
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g_warning(" gtypename=%s\n", G_OBJECT_TYPE_NAME(gobject_));
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#endif
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//Remember that it's been disposed (which only happens once):
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//This also stops us from destroying it again in the destructor when it calls destroy_().
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gobject_disposed_ = true;
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if(!cpp_destruction_in_progress_) //This function might have been called as a side-effect of destroy() when it called gtk_object_destroy().
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{
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if (!referenced_) //If it's manage()ed.
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{
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::destroy_notify_: before delete this.\n");
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#endif
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delete this; //Free the C++ instance.
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}
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else //It's not managed, but the C gobject_ just died before the C++ instance..
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{
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::destroy_notify_: setting gobject_ to 0\n");
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#endif
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gobject_ = 0;
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}
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}
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}
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void Object::destroy_()
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{
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//Called from destructors.
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//GTKMM_LIFECYCLE
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Gtk::Object::destroy_(): gobject_: %10X\n", gobject_);
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if(gobject_)
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g_warning(" gtypename: %s\n", G_OBJECT_TYPE_NAME(gobject_));
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#endif
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if ( !cpp_destruction_in_progress_ ) //see comment below.
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{
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//Prevent destroy_notify_() from running as a possible side-effect of gtk_object_destroy.
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//We can't predict whether destroy_notify_() will really be run, so we'll disconnect the C++ instance here.
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cpp_destruction_in_progress_ = true;
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//destroy the C instance:
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_destroy_c_instance();
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}
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//The C++ destructor will be reached later. This function was called by a destructor.
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}
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void Object::set_manage()
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{
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//GTKMM_LIFECYCLE
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//This object will not be unref()ed by gtkmm, though it could be destroyed if the coder deletes the C++ instance early.
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//This method is overriden in Gtk::Window because they can not be manage()ed.
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if (!referenced_) return; //It's already managed.
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// remove our reference
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if (gobject_->ref_count >= 1) //This should only happen just after creation. We don't use "==1" because GtkButton starts with a refcount of 2 when using a mnemonic.
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{
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//g_warning("Object::set_manage(), making object floating: %s\n", G_OBJECT_TYPE_NAME(gobject_));
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// Cowardly refuse to remove last reference make floating instead. //TODO: What does that comment mean?
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#ifdef GLIBMM_DEBUG_REFCOUNTING
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g_warning("Object::set_manage(): setting GTK_FLOATING: gobject_ = %p", (void*) gobj());
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g_warning(" gtypename=%s\n", G_OBJECT_TYPE_NAME(gobj()));
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#endif
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//deprecated: GTK_OBJECT_SET_FLAGS(gobj(), GTK_FLOATING);
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g_object_force_floating(gobject_);
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}
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else
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{
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g_warning("Object::set_manage(). Refcount seems to be 0. %s\n", G_OBJECT_TYPE_NAME(gobject_));
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//DEF_GLIBMM_DEBUG_UNREF(this, gobj())
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//g_object_unref(gobj());
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}
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//g_warning("Object::set_manage(): end: %s", G_OBJECT_TYPE_NAME(gobject_));
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//g_warning(" refcount=%d", G_OBJECT(gobj())->ref_count);
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referenced_ = false;
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}
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void Object::callback_destroy_(GObject*, void* data) //static
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{
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//This is only used for a short time, then disconnected.
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Object* cppObject = static_cast<Object*>(data);
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if(cppObject) //This will be 0 if the C++ destructor has already run.
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{
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cppObject->gobject_disposed_ = true;
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}
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}
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bool Object::is_managed_() const
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{
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return !referenced_;
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}
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} // namespace Gtk
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namespace
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{
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} // anonymous namespace
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namespace Glib
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{
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Gtk::Object* wrap(GtkObject* object, bool take_copy)
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{
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return dynamic_cast<Gtk::Object *> (Glib::wrap_auto ((GObject*)(object), take_copy));
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}
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} /* namespace Glib */
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namespace Gtk
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{
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/* The *_Class implementation: */
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const Glib::Class& Object_Class::init()
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{
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if(!gtype_) // create the GType if necessary
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{
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// Glib::Class has to know the class init function to clone custom types.
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class_init_func_ = &Object_Class::class_init_function;
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// This is actually just optimized away, apparently with no harm.
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// Make sure that the parent type has been created.
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//CppClassParent::CppObjectType::get_type();
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// Create the wrapper type, with the same class/instance size as the base type.
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register_derived_type(gtk_object_get_type());
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// Add derived versions of interfaces, if the C type implements any interfaces:
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}
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return *this;
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}
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void Object_Class::class_init_function(void* g_class, void* class_data)
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{
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BaseClassType *const klass = static_cast<BaseClassType*>(g_class);
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CppClassParent::class_init_function(klass, class_data);
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#ifdef GLIBMM_VFUNCS_ENABLED
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#endif //GLIBMM_VFUNCS_ENABLED
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#ifdef GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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#endif //GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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}
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#ifdef GLIBMM_VFUNCS_ENABLED
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#endif //GLIBMM_VFUNCS_ENABLED
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#ifdef GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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#endif //GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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Glib::ObjectBase* Object_Class::wrap_new(GObject* o)
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{
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return manage(new Object((GtkObject*)(o)));
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}
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/* The implementation: */
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Object::CppClassType Object::object_class_; // initialize static member
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GType Object::get_type()
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{
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return object_class_.init().get_type();
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}
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GType Object::get_base_type()
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{
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return gtk_object_get_type();
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}
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#ifdef GLIBMM_PROPERTIES_ENABLED
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Glib::PropertyProxy<void*> Object::property_user_data()
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{
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return Glib::PropertyProxy<void*>(this, "user-data");
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}
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#endif //GLIBMM_PROPERTIES_ENABLED
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#ifdef GLIBMM_PROPERTIES_ENABLED
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Glib::PropertyProxy_ReadOnly<void*> Object::property_user_data() const
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{
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return Glib::PropertyProxy_ReadOnly<void*>(this, "user-data");
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}
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#endif //GLIBMM_PROPERTIES_ENABLED
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#ifdef GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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#endif //GLIBMM_DEFAULT_SIGNAL_HANDLERS_ENABLED
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#ifdef GLIBMM_VFUNCS_ENABLED
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#endif //GLIBMM_VFUNCS_ENABLED
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} // namespace Gtk
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