forked from AuroraMiddleware/gtk
377 lines
12 KiB
C
377 lines
12 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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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
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GTK_OBJECT_H__
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#define __GTK_OBJECT_H__
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#include <gtk/gtkarg.h>
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#include <gtk/gtkenums.h>
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#include <gtk/gtktypeutils.h>
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#include <gtk/gtkdebug.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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/* Macro for casting a pointer to a GtkObject or GtkObjectClass pointer.
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* The second portion of the ?: statments are just in place to offer
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* descriptive warning message.
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*/
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#define GTK_OBJECT(object) ( \
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GTK_IS_OBJECT (object) ? \
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(GtkObject*) (object) : \
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(GtkObject*) gtk_type_check_object_cast ((GtkTypeObject*) (object), GTK_TYPE_OBJECT) \
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)
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#define GTK_OBJECT_CLASS(klass) ( \
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GTK_IS_OBJECT_CLASS (klass) ? \
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(GtkObjectClass*) (klass) : \
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(GtkObjectClass*) gtk_type_check_class_cast ((GtkTypeClass*) (klass), GTK_TYPE_OBJECT) \
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)
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/* Macro for testing whether `object' and `klass' are of type GTK_TYPE_OBJECT.
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*/
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#define GTK_IS_OBJECT(object) ( \
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(object) != NULL && \
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GTK_IS_OBJECT_CLASS (((GtkObject*) (object))->klass) \
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)
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#define GTK_IS_OBJECT_CLASS(klass) ( \
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(klass) != NULL && \
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GTK_FUNDAMENTAL_TYPE (((GtkObjectClass*) (klass))->type) == GTK_TYPE_OBJECT \
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)
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/* Macros for extracting various fields from GtkObject and GtkObjectClass.
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*/
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#define GTK_OBJECT_TYPE(obj) (GTK_OBJECT (obj)->klass->type)
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#define GTK_OBJECT_SIGNALS(obj) (GTK_OBJECT (obj)->klass->signals)
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#define GTK_OBJECT_NSIGNALS(obj) (GTK_OBJECT (obj)->klass->nsignals)
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/* GtkObject only uses the first 4 bits of the flags field.
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* Derived objects may use the remaining bits. Though this
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* is a kinda nasty break up, it does make the size of
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* derived objects smaller.
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*/
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typedef enum
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{
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GTK_DESTROYED = 1 << 0,
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GTK_FLOATING = 1 << 1,
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GTK_CONNECTED = 1 << 2,
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GTK_CONSTRUCTED = 1 << 3
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} GtkObjectFlags;
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/* Macros for extracting the object_flags from GtkObject.
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*/
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#define GTK_OBJECT_FLAGS(obj) (GTK_OBJECT (obj)->flags)
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#define GTK_OBJECT_DESTROYED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_DESTROYED) != 0)
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#define GTK_OBJECT_FLOATING(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_FLOATING) != 0)
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#define GTK_OBJECT_CONNECTED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_CONNECTED) != 0)
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#define GTK_OBJECT_CONSTRUCTED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_CONSTRUCTED) != 0)
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/* Macros for setting and clearing bits in the object_flags field of GtkObject.
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*/
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#define GTK_OBJECT_SET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) |= (flag)); }G_STMT_END
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#define GTK_OBJECT_UNSET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) &= ~(flag)); }G_STMT_END
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/* GtkArg flag bits for gtk_object_add_arg_type
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*/
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typedef enum
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{
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GTK_ARG_READABLE = 1 << 0,
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GTK_ARG_WRITABLE = 1 << 1,
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GTK_ARG_CONSTRUCT = 1 << 2,
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GTK_ARG_CONSTRUCT_ONLY = 1 << 3,
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GTK_ARG_CHILD_ARG = 1 << 4,
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GTK_ARG_MASK = 0x1f,
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/* aliases
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*/
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GTK_ARG_READWRITE = GTK_ARG_READABLE | GTK_ARG_WRITABLE
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} GtkArgFlags;
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typedef struct _GtkObjectClass GtkObjectClass;
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/* The GtkObject structure is the base of the Gtk+ objects hierarchy,
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* it ``inherits'' from the GtkTypeObject by mirroring its fields,
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* which must always be kept in sync completely. The GtkObject defines
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* the few basic items that all derived classes contain.
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*/
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struct _GtkObject
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{
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/* GtkTypeObject related fields: */
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GtkObjectClass *klass;
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/* 32 bits of flags. GtkObject only uses 4 of these bits and
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* GtkWidget uses the rest. This is done because structs are
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* aligned on 4 or 8 byte boundaries. If a new bitfield were
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* used in GtkWidget much space would be wasted.
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*/
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guint32 flags;
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/* reference count.
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* refer to the file REFCOUNTING on this issue.
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*/
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guint ref_count;
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/* A list of keyed data pointers, used for e.g. the list of signal
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* handlers or an object's user_data.
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*/
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GData *object_data;
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};
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/* The GtkObjectClass is the base of the Gtk+ objects classes hierarchy,
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* it ``inherits'' from the GtkTypeClass by mirroring its fields, which
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* must always be kept in sync completely. The GtkObjectClass defines
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* the basic necessities for the object inheritance mechanism to work.
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* Namely, the `signals' and `nsignals' fields as well as the function
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* pointers, required to end an object's lifetime.
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*/
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struct _GtkObjectClass
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{
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/* GtkTypeClass fields: */
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GtkType type;
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/* The signals this object class handles. "signals" is an
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* array of signal ID's.
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*/
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guint *signals;
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/* The number of signals listed in "signals".
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*/
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guint nsignals;
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/* The number of arguments per class.
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*/
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guint n_args;
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GSList *construct_args;
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/* Non overridable class methods to set and get per class arguments */
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void (*set_arg) (GtkObject *object,
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GtkArg *arg,
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guint arg_id);
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void (*get_arg) (GtkObject *object,
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GtkArg *arg,
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guint arg_id);
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/* The functions that will end an objects life time. In one way ore
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* another all three of them are defined for all objects. If an
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* object class overrides one of the methods in order to perform class
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* specific destruction then it must still invoke its superclass'
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* implementation of the method after it is finished with its
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* own cleanup. (See the destroy function for GtkWidget for
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* an example of how to do this).
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*/
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void (* shutdown) (GtkObject *object);
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void (* destroy) (GtkObject *object);
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void (* finalize) (GtkObject *object);
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};
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/* Application-level methods */
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GtkType gtk_object_get_type (void);
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/* Append a user defined signal without default handler to a class. */
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guint gtk_object_class_user_signal_new (GtkObjectClass *klass,
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const gchar *name,
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GtkSignalRunType signal_flags,
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GtkSignalMarshaller marshaller,
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GtkType return_val,
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guint nparams,
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...);
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guint gtk_object_class_user_signal_newv (GtkObjectClass *klass,
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const gchar *name,
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GtkSignalRunType signal_flags,
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GtkSignalMarshaller marshaller,
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GtkType return_val,
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guint nparams,
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GtkType *params);
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GtkObject* gtk_object_new (GtkType type,
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const gchar *first_arg_name,
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...);
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GtkObject* gtk_object_newv (GtkType object_type,
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guint n_args,
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GtkArg *args);
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void gtk_object_default_construct (GtkObject *object);
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void gtk_object_constructed (GtkObject *object);
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void gtk_object_sink (GtkObject *object);
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void gtk_object_ref (GtkObject *object);
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void gtk_object_unref (GtkObject *object);
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void gtk_object_weakref (GtkObject *object,
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GtkDestroyNotify notify,
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gpointer data);
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void gtk_object_weakunref (GtkObject *object,
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GtkDestroyNotify notify,
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gpointer data);
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void gtk_object_destroy (GtkObject *object);
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/* gtk_object_getv() sets an arguments type and value, or just
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* its type to GTK_TYPE_INVALID.
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* if GTK_FUNDAMENTAL_TYPE (arg->type) == GTK_TYPE_STRING, it's
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* the callers response to do a g_free (GTK_VALUE_STRING (arg));
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*/
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void gtk_object_getv (GtkObject *object,
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guint n_args,
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GtkArg *args);
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/* gtk_object_set() takes a variable argument list of the form:
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* (..., gchar *arg_name, ARG_VALUES, [repeatedly name/value pairs,] NULL)
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* where ARG_VALUES type depend on the argument and can consist of
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* more than one c-function argument.
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*/
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void gtk_object_set (GtkObject *object,
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const gchar *first_arg_name,
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...);
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void gtk_object_setv (GtkObject *object,
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guint n_args,
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GtkArg *args);
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/* Allocate a GtkArg array of size nargs that hold the
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* names and types of the args that can be used with
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* gtk_object_set/gtk_object_get. if (arg_flags!=NULL),
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* (*arg_flags) will be set to point to a newly allocated
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* guint array that holds the flags of the args.
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* It is the callers response to do a
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* g_free (returned_args); g_free (*arg_flags).
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*/
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GtkArg* gtk_object_query_args (GtkType class_type,
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guint32 **arg_flags,
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guint *n_args);
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/* Set 'data' to the "object_data" field of the object. The
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* data is indexed by the "key". If there is already data
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* associated with "key" then the new data will replace it.
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* If 'data' is NULL then this call is equivalent to
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* 'gtk_object_remove_data'.
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* The gtk_object_set_data_full variant acts just the same,
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* but takes an additional argument which is a function to
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* be called when the data is removed.
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* `gtk_object_remove_data' is equivalent to the above,
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* where 'data' is NULL
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* `gtk_object_get_data' gets the data associated with "key".
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*/
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void gtk_object_set_data (GtkObject *object,
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const gchar *key,
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gpointer data);
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void gtk_object_set_data_full (GtkObject *object,
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const gchar *key,
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gpointer data,
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GtkDestroyNotify destroy);
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void gtk_object_remove_data (GtkObject *object,
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const gchar *key);
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gpointer gtk_object_get_data (GtkObject *object,
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const gchar *key);
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void gtk_object_remove_no_notify (GtkObject *object,
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const gchar *key);
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/* Set/get the "user_data" object data field of "object". It should
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* be noted that these functions are no different than calling
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* `gtk_object_set_data'/`gtk_object_get_data' with a key of "user_data".
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* They are merely provided as a convenience.
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*/
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void gtk_object_set_user_data (GtkObject *object,
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gpointer data);
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gpointer gtk_object_get_user_data (GtkObject *object);
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/* Object-level methods */
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/* Append "signals" to those already defined in "class". */
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void gtk_object_class_add_signals (GtkObjectClass *klass,
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guint *signals,
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guint nsignals);
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/* the `arg_name' argument needs to be a const static string */
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void gtk_object_add_arg_type (const gchar *arg_name,
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GtkType arg_type,
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guint arg_flags,
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guint arg_id);
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/* Object data method variants that operate on key ids. */
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void gtk_object_set_data_by_id (GtkObject *object,
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GQuark data_id,
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gpointer data);
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void gtk_object_set_data_by_id_full (GtkObject *object,
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GQuark data_id,
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gpointer data,
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GtkDestroyNotify destroy);
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gpointer gtk_object_get_data_by_id (GtkObject *object,
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GQuark data_id);
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void gtk_object_remove_data_by_id (GtkObject *object,
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GQuark data_id);
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void gtk_object_remove_no_notify_by_id (GtkObject *object,
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GQuark key_id);
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#define gtk_object_data_try_key g_quark_try_string
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#define gtk_object_data_force_id g_quark_from_string
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/* Non-public methods */
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void gtk_object_arg_set (GtkObject *object,
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GtkArg *arg,
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GtkArgInfo *info);
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void gtk_object_arg_get (GtkObject *object,
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GtkArg *arg,
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GtkArgInfo *info);
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gchar* gtk_object_args_collect (GtkType object_type,
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GSList **arg_list_p,
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GSList **info_list_p,
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const gchar *first_arg_name,
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va_list var_args);
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gchar* gtk_object_arg_get_info (GtkType object_type,
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const gchar *arg_name,
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GtkArgInfo **info_p);
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void gtk_trace_referencing (GtkObject *object,
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const gchar *func,
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guint dummy,
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guint line,
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gboolean do_ref);
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#if G_ENABLE_DEBUG
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# define gtk_object_ref(o) G_STMT_START{gtk_trace_referencing((o),G_GNUC_PRETTY_FUNCTION,0,__LINE__,1);}G_STMT_END
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# define gtk_object_unref(o) G_STMT_START{gtk_trace_referencing((o),G_GNUC_PRETTY_FUNCTION,0,__LINE__,0);}G_STMT_END
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#endif /* G_ENABLE_DEBUG */
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/* Deprecated methods */
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/* Use gtk_object_class_user_signal_new() instead */
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guint gtk_object_class_add_user_signal (GtkObjectClass *klass,
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const gchar *name,
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GtkSignalMarshaller marshaller,
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GtkType return_val,
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guint nparams,
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...);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GTK_OBJECT_H__ */
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