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/* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 2000-2001 Red Hat, Inc.
*
* 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 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., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
#error "Only <glib-object.h> can be included directly."
#endif
#ifndef __G_SIGNAL_H__
#define __G_SIGNAL_H__
#include <gobject/gclosure.h>
#include <gobject/gvalue.h>
#include <gobject/gparam.h>
#include <gobject/gmarshal.h>
G_BEGIN_DECLS
/* --- typedefs --- */
typedef struct _GSignalQuery GSignalQuery;
typedef struct _GSignalInvocationHint GSignalInvocationHint;
typedef GClosureMarshal GSignalCMarshaller;
typedef gboolean (*GSignalEmissionHook) (GSignalInvocationHint *ihint,
guint n_param_values,
const GValue *param_values,
gpointer data);
typedef gboolean (*GSignalAccumulator) (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer data);
/* --- run, match and connect types --- */
typedef enum
{
G_SIGNAL_RUN_FIRST = 1 << 0,
G_SIGNAL_RUN_LAST = 1 << 1,
G_SIGNAL_RUN_CLEANUP = 1 << 2,
G_SIGNAL_NO_RECURSE = 1 << 3,
G_SIGNAL_DETAILED = 1 << 4,
G_SIGNAL_ACTION = 1 << 5,
G_SIGNAL_NO_HOOKS = 1 << 6
} GSignalFlags;
#define G_SIGNAL_FLAGS_MASK 0x7f
typedef enum
{
G_CONNECT_AFTER = 1 << 0,
G_CONNECT_SWAPPED = 1 << 1
} GConnectFlags;
typedef enum
{
G_SIGNAL_MATCH_ID = 1 << 0,
G_SIGNAL_MATCH_DETAIL = 1 << 1,
G_SIGNAL_MATCH_CLOSURE = 1 << 2,
G_SIGNAL_MATCH_FUNC = 1 << 3,
G_SIGNAL_MATCH_DATA = 1 << 4,
G_SIGNAL_MATCH_UNBLOCKED = 1 << 5
} GSignalMatchType;
#define G_SIGNAL_MATCH_MASK 0x3f
#define G_SIGNAL_TYPE_STATIC_SCOPE (G_TYPE_FLAG_RESERVED_ID_BIT)
/* --- signal information --- */
struct _GSignalInvocationHint
{
guint signal_id;
GQuark detail;
GSignalFlags run_type;
};
struct _GSignalQuery
{
guint signal_id;
const gchar *signal_name;
GType itype;
GSignalFlags signal_flags;
GType return_type; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */
guint n_params;
const GType *param_types; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */
};
/* --- signals --- */
guint g_signal_newv (const gchar *signal_name,
GType itype,
GSignalFlags signal_flags,
GClosure *class_closure,
GSignalAccumulator accumulator,
gpointer accu_data,
GSignalCMarshaller c_marshaller,
GType return_type,
guint n_params,
GType *param_types);
guint g_signal_new_valist (const gchar *signal_name,
GType itype,
GSignalFlags signal_flags,
GClosure *class_closure,
GSignalAccumulator accumulator,
gpointer accu_data,
GSignalCMarshaller c_marshaller,
GType return_type,
guint n_params,
va_list args);
guint g_signal_new (const gchar *signal_name,
GType itype,
GSignalFlags signal_flags,
guint class_offset,
GSignalAccumulator accumulator,
gpointer accu_data,
GSignalCMarshaller c_marshaller,
GType return_type,
guint n_params,
...);
void g_signal_emitv (const GValue *instance_and_params,
guint signal_id,
GQuark detail,
GValue *return_value);
void g_signal_emit_valist (gpointer instance,
guint signal_id,
GQuark detail,
va_list var_args);
void g_signal_emit (gpointer instance,
guint signal_id,
GQuark detail,
...);
void g_signal_emit_by_name (gpointer instance,
const gchar *detailed_signal,
...);
guint g_signal_lookup (const gchar *name,
GType itype);
G_CONST_RETURN gchar* g_signal_name (guint signal_id);
void g_signal_query (guint signal_id,
GSignalQuery *query);
guint* g_signal_list_ids (GType itype,
guint *n_ids);
gboolean g_signal_parse_name (const gchar *detailed_signal,
GType itype,
guint *signal_id_p,
GQuark *detail_p,
gboolean force_detail_quark);
GSignalInvocationHint* g_signal_get_invocation_hint (gpointer instance);
/* --- signal emissions --- */
void g_signal_stop_emission (gpointer instance,
guint signal_id,
GQuark detail);
void g_signal_stop_emission_by_name (gpointer instance,
const gchar *detailed_signal);
gulong g_signal_add_emission_hook (guint signal_id,
GQuark detail,
GSignalEmissionHook hook_func,
gpointer hook_data,
GDestroyNotify data_destroy);
void g_signal_remove_emission_hook (guint signal_id,
gulong hook_id);
/* --- signal handlers --- */
gboolean g_signal_has_handler_pending (gpointer instance,
guint signal_id,
GQuark detail,
gboolean may_be_blocked);
gulong g_signal_connect_closure_by_id (gpointer instance,
guint signal_id,
GQuark detail,
GClosure *closure,
gboolean after);
gulong g_signal_connect_closure (gpointer instance,
const gchar *detailed_signal,
GClosure *closure,
gboolean after);
gulong g_signal_connect_data (gpointer instance,
const gchar *detailed_signal,
GCallback c_handler,
gpointer data,
GClosureNotify destroy_data,
GConnectFlags connect_flags);
void g_signal_handler_block (gpointer instance,
gulong handler_id);
void g_signal_handler_unblock (gpointer instance,
gulong handler_id);
void g_signal_handler_disconnect (gpointer instance,
gulong handler_id);
gboolean g_signal_handler_is_connected (gpointer instance,
gulong handler_id);
gulong g_signal_handler_find (gpointer instance,
GSignalMatchType mask,
guint signal_id,
GQuark detail,
GClosure *closure,
gpointer func,
gpointer data);
guint g_signal_handlers_block_matched (gpointer instance,
GSignalMatchType mask,
guint signal_id,
GQuark detail,
GClosure *closure,
gpointer func,
gpointer data);
guint g_signal_handlers_unblock_matched (gpointer instance,
GSignalMatchType mask,
guint signal_id,
GQuark detail,
GClosure *closure,
gpointer func,
gpointer data);
guint g_signal_handlers_disconnect_matched (gpointer instance,
GSignalMatchType mask,
guint signal_id,
GQuark detail,
GClosure *closure,
gpointer func,
gpointer data);
/* --- chaining for language bindings --- */
void g_signal_override_class_closure (guint signal_id,
GType instance_type,
GClosure *class_closure);
void g_signal_chain_from_overridden (const GValue *instance_and_params,
GValue *return_value);
/* --- convenience --- */
#define g_signal_connect(instance, detailed_signal, c_handler, data) \
g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, (GConnectFlags) 0)
#define g_signal_connect_after(instance, detailed_signal, c_handler, data) \
g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, G_CONNECT_AFTER)
#define g_signal_connect_swapped(instance, detailed_signal, c_handler, data) \
g_signal_connect_data ((instance), (detailed_signal), (c_handler), (data), NULL, G_CONNECT_SWAPPED)
#define g_signal_handlers_disconnect_by_func(instance, func, data) \
g_signal_handlers_disconnect_matched ((instance), \
(GSignalMatchType) (G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA), \
0, 0, NULL, (func), (data))
#define g_signal_handlers_block_by_func(instance, func, data) \
g_signal_handlers_block_matched ((instance), \
(GSignalMatchType) (G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA), \
0, 0, NULL, (func), (data))
#define g_signal_handlers_unblock_by_func(instance, func, data) \
g_signal_handlers_unblock_matched ((instance), \
(GSignalMatchType) (G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA), \
0, 0, NULL, (func), (data))
gboolean g_signal_accumulator_true_handled (GSignalInvocationHint *ihint,
GValue *return_accu,
const GValue *handler_return,
gpointer dummy);
/*< private >*/
void g_signal_handlers_destroy (gpointer instance);
void _g_signals_destroy (GType itype);
G_END_DECLS
#endif /* __G_SIGNAL_H__ */
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