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- /* GTK - The GIMP Toolkit
- * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
- *
- * 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., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
- /*
- * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
- * file for a list of people on the GTK+ Team. See the ChangeLog
- * files for a list of changes. These files are distributed with
- * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
- */
-
- #ifndef __GTK_OBJECT_H__
- #define __GTK_OBJECT_H__
-
-
- #include <gtk/gtkarg.h>
- #include <gtk/gtkenums.h>
- #include <gtk/gtktypeutils.h>
- #include <gtk/gtkdebug.h>
-
-
- #ifdef __cplusplus
- extern "C" {
- #endif /* __cplusplus */
-
-
-
- /* Macro for casting a pointer to a GtkObject or GtkObjectClass pointer.
- * The second portion of the ?: statments are just in place to offer
- * descriptive warning message.
- */
- #define GTK_OBJECT(object) ( \
- GTK_IS_OBJECT (object) ? \
- (GtkObject*) (object) : \
- (GtkObject*) gtk_type_check_object_cast ((GtkTypeObject*) (object), GTK_TYPE_OBJECT) \
- )
- #define GTK_OBJECT_CLASS(klass) ( \
- GTK_IS_OBJECT_CLASS (klass) ? \
- (GtkObjectClass*) (klass) : \
- (GtkObjectClass*) gtk_type_check_class_cast ((GtkTypeClass*) (klass), GTK_TYPE_OBJECT) \
- )
-
- /* Macro for testing whether `object' and `klass' are of type GTK_TYPE_OBJECT.
- */
- #define GTK_IS_OBJECT(object) ( \
- (object) != NULL && \
- GTK_IS_OBJECT_CLASS (((GtkObject*) (object))->klass) \
- )
- #define GTK_IS_OBJECT_CLASS(klass) ( \
- (klass) != NULL && \
- GTK_FUNDAMENTAL_TYPE (((GtkObjectClass*) (klass))->type) == GTK_TYPE_OBJECT \
- )
-
- /* Macros for extracting various fields from GtkObject and GtkObjectClass.
- */
- #define GTK_OBJECT_TYPE(obj) (GTK_OBJECT (obj)->klass->type)
- #define GTK_OBJECT_SIGNALS(obj) (GTK_OBJECT (obj)->klass->signals)
- #define GTK_OBJECT_NSIGNALS(obj) (GTK_OBJECT (obj)->klass->nsignals)
-
- /* GtkObject only uses the first 4 bits of the flags field.
- * Derived objects may use the remaining bits. Though this
- * is a kinda nasty break up, it does make the size of
- * derived objects smaller.
- */
- typedef enum
- {
- GTK_DESTROYED = 1 << 0,
- GTK_FLOATING = 1 << 1,
- GTK_CONNECTED = 1 << 2,
- GTK_CONSTRUCTED = 1 << 3
- } GtkObjectFlags;
-
- /* Macros for extracting the object_flags from GtkObject.
- */
- #define GTK_OBJECT_FLAGS(obj) (GTK_OBJECT (obj)->flags)
- #define GTK_OBJECT_DESTROYED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_DESTROYED) != 0)
- #define GTK_OBJECT_FLOATING(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_FLOATING) != 0)
- #define GTK_OBJECT_CONNECTED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_CONNECTED) != 0)
- #define GTK_OBJECT_CONSTRUCTED(obj) ((GTK_OBJECT_FLAGS (obj) & GTK_CONSTRUCTED) != 0)
-
- /* Macros for setting and clearing bits in the object_flags field of GtkObject.
- */
- #define GTK_OBJECT_SET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) |= (flag)); }G_STMT_END
- #define GTK_OBJECT_UNSET_FLAGS(obj,flag) G_STMT_START{ (GTK_OBJECT_FLAGS (obj) &= ~(flag)); }G_STMT_END
-
- /* GtkArg flag bits for gtk_object_add_arg_type
- */
- typedef enum
- {
- GTK_ARG_READABLE = 1 << 0,
- GTK_ARG_WRITABLE = 1 << 1,
- GTK_ARG_CONSTRUCT = 1 << 2,
- GTK_ARG_CONSTRUCT_ONLY = 1 << 3,
- GTK_ARG_CHILD_ARG = 1 << 4,
- GTK_ARG_MASK = 0x1f,
-
- /* aliases
- */
- GTK_ARG_READWRITE = GTK_ARG_READABLE | GTK_ARG_WRITABLE
- } GtkArgFlags;
-
- typedef struct _GtkObjectClass GtkObjectClass;
-
-
- /* The GtkObject structure is the base of the Gtk+ objects hierarchy,
- * it ``inherits'' from the GtkTypeObject by mirroring its fields,
- * which must always be kept in sync completely. The GtkObject defines
- * the few basic items that all derived classes contain.
- */
- struct _GtkObject
- {
- /* GtkTypeObject related fields: */
- GtkObjectClass *klass;
-
-
- /* 32 bits of flags. GtkObject only uses 4 of these bits and
- * GtkWidget uses the rest. This is done because structs are
- * aligned on 4 or 8 byte boundaries. If a new bitfield were
- * used in GtkWidget much space would be wasted.
- */
- guint32 flags;
-
- /* reference count.
- * refer to the file docs/refcounting.txt on this issue.
- */
- guint ref_count;
-
- /* A list of keyed data pointers, used for e.g. the list of signal
- * handlers or an object's user_data.
- */
- GData *object_data;
- };
-
- /* The GtkObjectClass is the base of the Gtk+ objects classes hierarchy,
- * it ``inherits'' from the GtkTypeClass by mirroring its fields, which
- * must always be kept in sync completely. The GtkObjectClass defines
- * the basic necessities for the object inheritance mechanism to work.
- * Namely, the `signals' and `nsignals' fields as well as the function
- * pointers, required to end an object's lifetime.
- */
- struct _GtkObjectClass
- {
- /* GtkTypeClass fields: */
- GtkType type;
-
-
- /* The signals this object class handles. "signals" is an
- * array of signal ID's.
- */
- guint *signals;
-
- /* The number of signals listed in "signals".
- */
- guint nsignals;
-
- /* The number of arguments per class.
- */
- guint n_args;
- GSList *construct_args;
-
- /* Non overridable class methods to set and get per class arguments */
- void (*set_arg) (GtkObject *object,
- GtkArg *arg,
- guint arg_id);
- void (*get_arg) (GtkObject *object,
- GtkArg *arg,
- guint arg_id);
-
- /* The functions that will end an objects life time. In one way ore
- * another all three of them are defined for all objects. If an
- * object class overrides one of the methods in order to perform class
- * specific destruction then it must still invoke its superclass'
- * implementation of the method after it is finished with its
- * own cleanup. (See the destroy function for GtkWidget for
- * an example of how to do this).
- */
- void (* shutdown) (GtkObject *object);
- void (* destroy) (GtkObject *object);
-
- void (* finalize) (GtkObject *object);
- };
-
-
-
- /* Application-level methods */
-
- GtkType gtk_object_get_type (void);
-
- /* Append a user defined signal without default handler to a class. */
- guint gtk_object_class_user_signal_new (GtkObjectClass *klass,
- const gchar *name,
- GtkSignalRunType signal_flags,
- GtkSignalMarshaller marshaller,
- GtkType return_val,
- guint nparams,
- ...);
- guint gtk_object_class_user_signal_newv (GtkObjectClass *klass,
- const gchar *name,
- GtkSignalRunType signal_flags,
- GtkSignalMarshaller marshaller,
- GtkType return_val,
- guint nparams,
- GtkType *params);
- GtkObject* gtk_object_new (GtkType type,
- const gchar *first_arg_name,
- ...);
- GtkObject* gtk_object_newv (GtkType object_type,
- guint n_args,
- GtkArg *args);
- void gtk_object_default_construct (GtkObject *object);
- void gtk_object_constructed (GtkObject *object);
- void gtk_object_sink (GtkObject *object);
- void gtk_object_ref (GtkObject *object);
- void gtk_object_unref (GtkObject *object);
- void gtk_object_weakref (GtkObject *object,
- GtkDestroyNotify notify,
- gpointer data);
- void gtk_object_weakunref (GtkObject *object,
- GtkDestroyNotify notify,
- gpointer data);
- void gtk_object_destroy (GtkObject *object);
-
- /* gtk_object_getv() sets an arguments type and value, or just
- * its type to GTK_TYPE_INVALID.
- * if GTK_FUNDAMENTAL_TYPE (arg->type) == GTK_TYPE_STRING, it's
- * the callers response to do a g_free (GTK_VALUE_STRING (arg));
- */
- void gtk_object_getv (GtkObject *object,
- guint n_args,
- GtkArg *args);
- /* gtk_object_get() sets the variable values pointed to by the adresses
- * passed after the argument names according to the arguments value.
- * if GTK_FUNDAMENTAL_TYPE (arg->type) == GTK_TYPE_STRING, it's
- * the callers response to do a g_free (retrived_value);
- */
- void gtk_object_get (GtkObject *object,
- const gchar *first_arg_name,
- ...);
-
- /* gtk_object_set() takes a variable argument list of the form:
- * (..., gchar *arg_name, ARG_VALUES, [repeatedly name/value pairs,] NULL)
- * where ARG_VALUES type depend on the argument and can consist of
- * more than one c-function argument.
- */
- void gtk_object_set (GtkObject *object,
- const gchar *first_arg_name,
- ...);
- void gtk_object_setv (GtkObject *object,
- guint n_args,
- GtkArg *args);
-
- /* Allocate a GtkArg array of size nargs that hold the
- * names and types of the args that can be used with
- * gtk_object_set/gtk_object_get. if (arg_flags!=NULL),
- * (*arg_flags) will be set to point to a newly allocated
- * guint array that holds the flags of the args.
- * It is the callers response to do a
- * g_free (returned_args); g_free (*arg_flags).
- */
- GtkArg* gtk_object_query_args (GtkType class_type,
- guint32 **arg_flags,
- guint *n_args);
-
- /* Set 'data' to the "object_data" field of the object. The
- * data is indexed by the "key". If there is already data
- * associated with "key" then the new data will replace it.
- * If 'data' is NULL then this call is equivalent to
- * 'gtk_object_remove_data'.
- * The gtk_object_set_data_full variant acts just the same,
- * but takes an additional argument which is a function to
- * be called when the data is removed.
- * `gtk_object_remove_data' is equivalent to the above,
- * where 'data' is NULL
- * `gtk_object_get_data' gets the data associated with "key".
- */
- void gtk_object_set_data (GtkObject *object,
- const gchar *key,
- gpointer data);
- void gtk_object_set_data_full (GtkObject *object,
- const gchar *key,
- gpointer data,
- GtkDestroyNotify destroy);
- void gtk_object_remove_data (GtkObject *object,
- const gchar *key);
- gpointer gtk_object_get_data (GtkObject *object,
- const gchar *key);
- void gtk_object_remove_no_notify (GtkObject *object,
- const gchar *key);
-
- /* Set/get the "user_data" object data field of "object". It should
- * be noted that these functions are no different than calling
- * `gtk_object_set_data'/`gtk_object_get_data' with a key of "user_data".
- * They are merely provided as a convenience.
- */
- void gtk_object_set_user_data (GtkObject *object,
- gpointer data);
- gpointer gtk_object_get_user_data (GtkObject *object);
-
-
- /* Object-level methods */
-
- /* Append "signals" to those already defined in "class". */
- void gtk_object_class_add_signals (GtkObjectClass *klass,
- guint *signals,
- guint nsignals);
- /* the `arg_name' argument needs to be a const static string */
- void gtk_object_add_arg_type (const gchar *arg_name,
- GtkType arg_type,
- guint arg_flags,
- guint arg_id);
-
- /* Object data method variants that operate on key ids. */
- void gtk_object_set_data_by_id (GtkObject *object,
- GQuark data_id,
- gpointer data);
- void gtk_object_set_data_by_id_full (GtkObject *object,
- GQuark data_id,
- gpointer data,
- GtkDestroyNotify destroy);
- gpointer gtk_object_get_data_by_id (GtkObject *object,
- GQuark data_id);
- void gtk_object_remove_data_by_id (GtkObject *object,
- GQuark data_id);
- void gtk_object_remove_no_notify_by_id (GtkObject *object,
- GQuark key_id);
- #define gtk_object_data_try_key g_quark_try_string
- #define gtk_object_data_force_id g_quark_from_string
-
-
- /* Non-public methods */
-
- void gtk_object_arg_set (GtkObject *object,
- GtkArg *arg,
- GtkArgInfo *info);
- void gtk_object_arg_get (GtkObject *object,
- GtkArg *arg,
- GtkArgInfo *info);
- gchar* gtk_object_args_collect (GtkType object_type,
- GSList **arg_list_p,
- GSList **info_list_p,
- const gchar *first_arg_name,
- va_list var_args);
- gchar* gtk_object_arg_get_info (GtkType object_type,
- const gchar *arg_name,
- GtkArgInfo **info_p);
- void gtk_trace_referencing (GtkObject *object,
- const gchar *func,
- guint dummy,
- guint line,
- gboolean do_ref);
- #if G_ENABLE_DEBUG
- # define gtk_object_ref(o) G_STMT_START{gtk_trace_referencing((o),G_GNUC_PRETTY_FUNCTION,0,__LINE__,1);}G_STMT_END
- # define gtk_object_unref(o) G_STMT_START{gtk_trace_referencing((o),G_GNUC_PRETTY_FUNCTION,0,__LINE__,0);}G_STMT_END
- #endif /* G_ENABLE_DEBUG */
-
-
-
-
-
-
-
-
- #ifdef __cplusplus
- }
- #endif /* __cplusplus */
-
-
- #endif /* __GTK_OBJECT_H__ */
-