2 * Copyright © 2009, 2010 Codethink Limited
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the licence, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
17 * Author: Ryan Lortie <desrt@desrt.ca>
26 #include "gsettings.h"
28 #include "gdelayedsettingsbackend.h"
29 #include "gsettingsbackendinternal.h"
30 #include "gsettings-mapping.h"
31 #include "gsettingsschema-internal.h"
38 * @short_description: High-level API for application settings
41 * The #GSettings class provides a convenient API for storing and retrieving
42 * application settings.
44 * Reads and writes can be considered to be non-blocking. Reading
45 * settings with #GSettings is typically extremely fast: on
46 * approximately the same order of magnitude (but slower than) a
47 * #GHashTable lookup. Writing settings is also extremely fast in terms
48 * of time to return to your application, but can be extremely expensive
49 * for other threads and other processes. Many settings backends
50 * (including dconf) have lazy initialisation which means in the common
51 * case of the user using their computer without modifying any settings
52 * a lot of work can be avoided. For dconf, the D-Bus service doesn't
53 * even need to be started in this case. For this reason, you should
54 * only ever modify #GSettings keys in response to explicit user action.
55 * Particular care should be paid to ensure that modifications are not
56 * made during startup -- for example, when setting the initial value
57 * of preferences widgets. The built-in g_settings_bind() functionality
58 * is careful not to write settings in response to notify signals as a
59 * result of modifications that it makes to widgets.
61 * When creating a GSettings instance, you have to specify a schema
62 * that describes the keys in your settings and their types and default
63 * values, as well as some other information.
65 * Normally, a schema has as fixed path that determines where the settings
66 * are stored in the conceptual global tree of settings. However, schemas
67 * can also be 'relocatable', i.e. not equipped with a fixed path. This is
68 * useful e.g. when the schema describes an 'account', and you want to be
69 * able to store a arbitrary number of accounts.
71 * Paths must start with and end with a forward slash character ('/')
72 * and must not contain two sequential slash characters. Paths should
73 * be chosen based on a domain name associated with the program or
74 * library to which the settings belong. Examples of paths are
75 * "/org/gtk/settings/file-chooser/" and "/ca/desrt/dconf-editor/".
76 * Paths should not start with "/apps/", "/desktop/" or "/system/" as
77 * they often did in GConf.
79 * Unlike other configuration systems (like GConf), GSettings does not
80 * restrict keys to basic types like strings and numbers. GSettings stores
81 * values as #GVariant, and allows any #GVariantType for keys. Key names
82 * are restricted to lowercase characters, numbers and '-'. Furthermore,
83 * the names must begin with a lowercase character, must not end
84 * with a '-', and must not contain consecutive dashes.
86 * Similar to GConf, the default values in GSettings schemas can be
87 * localized, but the localized values are stored in gettext catalogs
88 * and looked up with the domain that is specified in the
89 * <tag class="attribute">gettext-domain</tag> attribute of the
90 * <tag class="starttag">schemalist</tag> or <tag class="starttag">schema</tag>
91 * elements and the category that is specified in the l10n attribute of the
92 * <tag class="starttag">key</tag> element.
94 * GSettings uses schemas in a compact binary form that is created
95 * by the <link linkend="glib-compile-schemas">glib-compile-schemas</link>
96 * utility. The input is a schema description in an XML format that can be
97 * described by the following DTD:
100 * <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/gschema.dtd"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include>
103 * glib-compile-schemas expects schema files to have the extension <filename>.gschema.xml</filename>
105 * At runtime, schemas are identified by their id (as specified
106 * in the <tag class="attribute">id</tag> attribute of the
107 * <tag class="starttag">schema</tag> element). The
108 * convention for schema ids is to use a dotted name, similar in
109 * style to a D-Bus bus name, e.g. "org.gnome.SessionManager". In particular,
110 * if the settings are for a specific service that owns a D-Bus bus name,
111 * the D-Bus bus name and schema id should match. For schemas which deal
112 * with settings not associated with one named application, the id should
113 * not use StudlyCaps, e.g. "org.gnome.font-rendering".
115 * In addition to #GVariant types, keys can have types that have enumerated
116 * types. These can be described by a <tag class="starttag">choice</tag>,
117 * <tag class="starttag">enum</tag> or <tag class="starttag">flags</tag> element, see
118 * <xref linkend="schema-enumerated"/>. The underlying type of
119 * such a key is string, but you can use g_settings_get_enum(),
120 * g_settings_set_enum(), g_settings_get_flags(), g_settings_set_flags()
121 * access the numeric values corresponding to the string value of enum
124 * An example for default value:
127 * <schema id="org.gtk.Test" path="/org/gtk/Test/" gettext-domain="test">
129 * <key name="greeting" type="s">
130 * <default l10n="messages">"Hello, earthlings"</default>
131 * <summary>A greeting</summary>
133 * Greeting of the invading martians
137 * <key name="box" type="(ii)">
138 * <default>(20,30)</default>
145 * An example for ranges, choices and enumerated types:
149 * <enum id="org.gtk.Test.myenum">
150 * <value nick="first" value="1"/>
151 * <value nick="second" value="2"/>
154 * <flags id="org.gtk.Test.myflags">
155 * <value nick="flag1" value="1"/>
156 * <value nick="flag2" value="2"/>
157 * <value nick="flag3" value="4"/>
160 * <schema id="org.gtk.Test">
162 * <key name="key-with-range" type="i">
163 * <range min="1" max="100"/>
164 * <default>10</default>
167 * <key name="key-with-choices" type="s">
169 * <choice value='Elisabeth'/>
170 * <choice value='Annabeth'/>
171 * <choice value='Joe'/>
174 * <alias value='Anna' target='Annabeth'/>
175 * <alias value='Beth' target='Elisabeth'/>
177 * <default>'Joe'</default>
180 * <key name='enumerated-key' enum='org.gtk.Test.myenum'>
181 * <default>'first'</default>
184 * <key name='flags-key' flags='org.gtk.Test.myflags'>
185 * <default>["flag1",flag2"]</default>
191 * ## Vendor overrides
193 * Default values are defined in the schemas that get installed by
194 * an application. Sometimes, it is necessary for a vendor or distributor
195 * to adjust these defaults. Since patching the XML source for the schema
196 * is inconvenient and error-prone,
197 * <link linkend="glib-compile-schemas">glib-compile-schemas</link> reads
198 * so-called 'vendor override' files. These are keyfiles in the same
199 * directory as the XML schema sources which can override default values.
200 * The schema id serves as the group name in the key file, and the values
201 * are expected in serialized GVariant form, as in the following example:
208 * glib-compile-schemas expects schema files to have the extension
209 * <filename>.gschema.override</filename>
213 * A very convenient feature of GSettings lets you bind #GObject properties
214 * directly to settings, using g_settings_bind(). Once a GObject property
215 * has been bound to a setting, changes on either side are automatically
216 * propagated to the other side. GSettings handles details like mapping
217 * between GObject and GVariant types, and preventing infinite cycles.
219 * This makes it very easy to hook up a preferences dialog to the
220 * underlying settings. To make this even more convenient, GSettings
221 * looks for a boolean property with the name "sensitivity" and
222 * automatically binds it to the writability of the bound setting.
223 * If this 'magic' gets in the way, it can be suppressed with the
224 * #G_SETTINGS_BIND_NO_SENSITIVITY flag.
227 struct _GSettingsPrivate
229 /* where the signals go... */
230 GMainContext *main_context;
232 GSettingsBackend *backend;
233 GSettingsSchema *schema;
236 GDelayedSettingsBackend *delayed;
252 SIGNAL_WRITABLE_CHANGE_EVENT,
253 SIGNAL_WRITABLE_CHANGED,
259 static guint g_settings_signals[N_SIGNALS];
261 G_DEFINE_TYPE_WITH_PRIVATE (GSettings, g_settings, G_TYPE_OBJECT)
265 g_settings_real_change_event (GSettings *settings,
272 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
274 for (i = 0; i < n_keys; i++)
276 const gchar *key = g_quark_to_string (keys[i]);
278 if (g_str_has_suffix (key, "/"))
281 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGED], keys[i], key);
288 g_settings_real_writable_change_event (GSettings *settings,
291 const GQuark *keys = &key;
296 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
298 for (i = 0; i < n_keys; i++)
300 const gchar *key = g_quark_to_string (keys[i]);
302 if (g_str_has_suffix (key, "/"))
305 g_signal_emit (settings, g_settings_signals[SIGNAL_WRITABLE_CHANGED], keys[i], key);
312 settings_backend_changed (GObject *target,
313 GSettingsBackend *backend,
317 GSettings *settings = G_SETTINGS (target);
318 gboolean ignore_this;
321 /* We used to assert here:
323 * settings->priv->backend == backend
325 * but it could be the case that a notification is queued for delivery
326 * while someone calls g_settings_delay() (which changes the backend).
328 * Since the delay backend would just pass that straight through
329 * anyway, it doesn't make sense to try to detect this case.
330 * Therefore, we just accept it.
333 for (i = 0; key[i] == settings->priv->path[i]; i++);
335 if (settings->priv->path[i] == '\0' &&
336 g_settings_schema_has_key (settings->priv->schema, key + i))
340 quark = g_quark_from_string (key + i);
341 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGE_EVENT],
342 0, &quark, 1, &ignore_this);
347 settings_backend_path_changed (GObject *target,
348 GSettingsBackend *backend,
352 GSettings *settings = G_SETTINGS (target);
353 gboolean ignore_this;
355 if (g_str_has_prefix (settings->priv->path, path))
356 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGE_EVENT],
357 0, NULL, 0, &ignore_this);
361 settings_backend_keys_changed (GObject *target,
362 GSettingsBackend *backend,
364 const gchar * const *items,
367 GSettings *settings = G_SETTINGS (target);
368 gboolean ignore_this;
371 for (i = 0; settings->priv->path[i] &&
372 settings->priv->path[i] == path[i]; i++);
379 for (j = 0; items[j]; j++)
381 const gchar *item = items[j];
384 for (k = 0; item[k] == settings->priv->path[i + k]; k++);
386 if (settings->priv->path[i + k] == '\0' &&
387 g_settings_schema_has_key (settings->priv->schema, item + k))
388 quarks[l++] = g_quark_from_string (item + k);
390 /* "256 quarks ought to be enough for anybody!"
391 * If this bites you, I'm sorry. Please file a bug.
397 g_signal_emit (settings, g_settings_signals[SIGNAL_CHANGE_EVENT],
398 0, quarks, l, &ignore_this);
403 settings_backend_writable_changed (GObject *target,
404 GSettingsBackend *backend,
407 GSettings *settings = G_SETTINGS (target);
408 gboolean ignore_this;
411 for (i = 0; key[i] == settings->priv->path[i]; i++);
413 if (settings->priv->path[i] == '\0' &&
414 g_settings_schema_has_key (settings->priv->schema, key + i))
415 g_signal_emit (settings, g_settings_signals[SIGNAL_WRITABLE_CHANGE_EVENT],
416 0, g_quark_from_string (key + i), &ignore_this);
420 settings_backend_path_writable_changed (GObject *target,
421 GSettingsBackend *backend,
424 GSettings *settings = G_SETTINGS (target);
425 gboolean ignore_this;
427 if (g_str_has_prefix (settings->priv->path, path))
428 g_signal_emit (settings, g_settings_signals[SIGNAL_WRITABLE_CHANGE_EVENT],
429 0, (GQuark) 0, &ignore_this);
432 /* Properties, Construction, Destruction {{{1 */
434 g_settings_set_property (GObject *object,
439 GSettings *settings = G_SETTINGS (object);
445 GSettingsSchema *schema;
447 schema = g_value_dup_boxed (value);
449 /* we receive a set_property() call for "settings-schema" even
450 * if it was not specified (ie: with NULL value). ->schema
451 * could already be set at this point (ie: via "schema-id").
452 * check for NULL to avoid clobbering the existing value.
456 g_assert (settings->priv->schema == NULL);
457 settings->priv->schema = schema;
464 const gchar *schema_id;
466 schema_id = g_value_get_string (value);
468 /* we receive a set_property() call for both "schema" and
469 * "schema-id", even if they are not set. Hopefully only one of
472 if (schema_id != NULL)
474 GSettingsSchemaSource *default_source;
476 g_assert (settings->priv->schema == NULL);
477 default_source = g_settings_schema_source_get_default ();
479 if (default_source == NULL)
480 g_error ("No GSettings schemas are installed on the system");
482 settings->priv->schema = g_settings_schema_source_lookup (default_source, schema_id, TRUE);
484 if (settings->priv->schema == NULL)
485 g_error ("Settings schema '%s' is not installed\n", schema_id);
491 settings->priv->path = g_value_dup_string (value);
495 settings->priv->backend = g_value_dup_object (value);
499 g_assert_not_reached ();
504 g_settings_get_property (GObject *object,
509 GSettings *settings = G_SETTINGS (object);
514 g_value_set_boxed (value, settings->priv->schema);
518 g_value_set_string (value, g_settings_schema_get_id (settings->priv->schema));
522 g_value_set_object (value, settings->priv->backend);
526 g_value_set_string (value, settings->priv->path);
529 case PROP_HAS_UNAPPLIED:
530 g_value_set_boolean (value, g_settings_get_has_unapplied (settings));
533 case PROP_DELAY_APPLY:
534 g_value_set_boolean (value, settings->priv->delayed != NULL);
538 g_assert_not_reached ();
542 static const GSettingsListenerVTable listener_vtable = {
543 settings_backend_changed,
544 settings_backend_path_changed,
545 settings_backend_keys_changed,
546 settings_backend_writable_changed,
547 settings_backend_path_writable_changed
551 g_settings_constructed (GObject *object)
553 GSettings *settings = G_SETTINGS (object);
554 const gchar *schema_path;
556 schema_path = g_settings_schema_get_path (settings->priv->schema);
558 if (settings->priv->path && schema_path && strcmp (settings->priv->path, schema_path) != 0)
559 g_error ("settings object created with schema '%s' and path '%s', but path '%s' is specified by schema",
560 g_settings_schema_get_id (settings->priv->schema), settings->priv->path, schema_path);
562 if (settings->priv->path == NULL)
564 if (schema_path == NULL)
565 g_error ("attempting to create schema '%s' without a path",
566 g_settings_schema_get_id (settings->priv->schema));
568 settings->priv->path = g_strdup (schema_path);
571 if (settings->priv->backend == NULL)
572 settings->priv->backend = g_settings_backend_get_default ();
574 g_settings_backend_watch (settings->priv->backend,
575 &listener_vtable, G_OBJECT (settings),
576 settings->priv->main_context);
577 g_settings_backend_subscribe (settings->priv->backend,
578 settings->priv->path);
582 g_settings_finalize (GObject *object)
584 GSettings *settings = G_SETTINGS (object);
586 g_settings_backend_unsubscribe (settings->priv->backend,
587 settings->priv->path);
588 g_main_context_unref (settings->priv->main_context);
589 g_object_unref (settings->priv->backend);
590 g_settings_schema_unref (settings->priv->schema);
591 g_free (settings->priv->path);
593 G_OBJECT_CLASS (g_settings_parent_class)->finalize (object);
597 g_settings_init (GSettings *settings)
599 settings->priv = g_settings_get_instance_private (settings);
600 settings->priv->main_context = g_main_context_ref_thread_default ();
604 g_settings_class_init (GSettingsClass *class)
606 GObjectClass *object_class = G_OBJECT_CLASS (class);
608 class->writable_change_event = g_settings_real_writable_change_event;
609 class->change_event = g_settings_real_change_event;
611 object_class->set_property = g_settings_set_property;
612 object_class->get_property = g_settings_get_property;
613 object_class->constructed = g_settings_constructed;
614 object_class->finalize = g_settings_finalize;
617 * GSettings::changed:
618 * @settings: the object on which the signal was emitted
619 * @key: the name of the key that changed
621 * The "changed" signal is emitted when a key has potentially changed.
622 * You should call one of the g_settings_get() calls to check the new
625 * This signal supports detailed connections. You can connect to the
626 * detailed signal "changed::x" in order to only receive callbacks
627 * when key "x" changes.
629 g_settings_signals[SIGNAL_CHANGED] =
630 g_signal_new ("changed", G_TYPE_SETTINGS,
631 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
632 G_STRUCT_OFFSET (GSettingsClass, changed),
633 NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE,
634 1, G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);
637 * GSettings::change-event:
638 * @settings: the object on which the signal was emitted
639 * @keys: (array length=n_keys) (element-type GQuark) (allow-none):
640 * an array of #GQuark<!-- -->s for the changed keys, or %NULL
641 * @n_keys: the length of the @keys array, or 0
643 * The "change-event" signal is emitted once per change event that
644 * affects this settings object. You should connect to this signal
645 * only if you are interested in viewing groups of changes before they
646 * are split out into multiple emissions of the "changed" signal.
647 * For most use cases it is more appropriate to use the "changed" signal.
649 * In the event that the change event applies to one or more specified
650 * keys, @keys will be an array of #GQuark of length @n_keys. In the
651 * event that the change event applies to the #GSettings object as a
652 * whole (ie: potentially every key has been changed) then @keys will
653 * be %NULL and @n_keys will be 0.
655 * The default handler for this signal invokes the "changed" signal
656 * for each affected key. If any other connected handler returns
657 * %TRUE then this default functionality will be suppressed.
659 * Returns: %TRUE to stop other handlers from being invoked for the
660 * event. FALSE to propagate the event further.
662 g_settings_signals[SIGNAL_CHANGE_EVENT] =
663 g_signal_new ("change-event", G_TYPE_SETTINGS,
665 G_STRUCT_OFFSET (GSettingsClass, change_event),
666 g_signal_accumulator_true_handled, NULL,
668 G_TYPE_BOOLEAN, 2, G_TYPE_POINTER, G_TYPE_INT);
671 * GSettings::writable-changed:
672 * @settings: the object on which the signal was emitted
675 * The "writable-changed" signal is emitted when the writability of a
676 * key has potentially changed. You should call
677 * g_settings_is_writable() in order to determine the new status.
679 * This signal supports detailed connections. You can connect to the
680 * detailed signal "writable-changed::x" in order to only receive
681 * callbacks when the writability of "x" changes.
683 g_settings_signals[SIGNAL_WRITABLE_CHANGED] =
684 g_signal_new ("writable-changed", G_TYPE_SETTINGS,
685 G_SIGNAL_RUN_LAST | G_SIGNAL_DETAILED,
686 G_STRUCT_OFFSET (GSettingsClass, writable_changed),
687 NULL, NULL, g_cclosure_marshal_VOID__STRING, G_TYPE_NONE,
688 1, G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE);
691 * GSettings::writable-change-event:
692 * @settings: the object on which the signal was emitted
693 * @key: the quark of the key, or 0
695 * The "writable-change-event" signal is emitted once per writability
696 * change event that affects this settings object. You should connect
697 * to this signal if you are interested in viewing groups of changes
698 * before they are split out into multiple emissions of the
699 * "writable-changed" signal. For most use cases it is more
700 * appropriate to use the "writable-changed" signal.
702 * In the event that the writability change applies only to a single
703 * key, @key will be set to the #GQuark for that key. In the event
704 * that the writability change affects the entire settings object,
707 * The default handler for this signal invokes the "writable-changed"
708 * and "changed" signals for each affected key. This is done because
709 * changes in writability might also imply changes in value (if for
710 * example, a new mandatory setting is introduced). If any other
711 * connected handler returns %TRUE then this default functionality
712 * will be suppressed.
714 * Returns: %TRUE to stop other handlers from being invoked for the
715 * event. FALSE to propagate the event further.
717 g_settings_signals[SIGNAL_WRITABLE_CHANGE_EVENT] =
718 g_signal_new ("writable-change-event", G_TYPE_SETTINGS,
720 G_STRUCT_OFFSET (GSettingsClass, writable_change_event),
721 g_signal_accumulator_true_handled, NULL,
722 NULL, G_TYPE_BOOLEAN, 1, G_TYPE_UINT);
727 * The name of the context that the settings are stored in.
729 g_object_class_install_property (object_class, PROP_BACKEND,
730 g_param_spec_object ("backend",
731 P_("GSettingsBackend"),
732 P_("The GSettingsBackend for this settings object"),
733 G_TYPE_SETTINGS_BACKEND, G_PARAM_CONSTRUCT_ONLY |
734 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
737 * GSettings:settings-schema:
739 * The #GSettingsSchema describing the types of keys for this
742 * Ideally, this property would be called 'schema'. #GSettingsSchema
743 * has only existed since version 2.32, however, and before then the
744 * 'schema' property was used to refer to the ID of the schema rather
745 * than the schema itself. Take care.
747 g_object_class_install_property (object_class, PROP_SCHEMA,
748 g_param_spec_boxed ("settings-schema",
750 P_("The GSettingsSchema for this settings object"),
751 G_TYPE_SETTINGS_SCHEMA,
752 G_PARAM_CONSTRUCT_ONLY |
753 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
758 * The name of the schema that describes the types of keys
759 * for this #GSettings object.
761 * The type of this property is *not* #GSettingsSchema.
762 * #GSettingsSchema has only existed since version 2.32 and
763 * unfortunately this name was used in previous versions to refer to
764 * the schema ID rather than the schema itself. Take care to use the
765 * 'settings-schema' property if you wish to pass in a
768 * Deprecated:2.32:Use the 'schema-id' property instead. In a future
769 * version, this property may instead refer to a #GSettingsSchema.
771 g_object_class_install_property (object_class, PROP_SCHEMA_ID,
772 g_param_spec_string ("schema",
774 P_("The name of the schema for this settings object"),
776 G_PARAM_CONSTRUCT_ONLY |
777 G_PARAM_DEPRECATED | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
780 * GSettings:schema-id:
782 * The name of the schema that describes the types of keys
783 * for this #GSettings object.
785 g_object_class_install_property (object_class, PROP_SCHEMA_ID,
786 g_param_spec_string ("schema-id",
788 P_("The name of the schema for this settings object"),
790 G_PARAM_CONSTRUCT_ONLY |
791 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
796 * The path within the backend where the settings are stored.
798 g_object_class_install_property (object_class, PROP_PATH,
799 g_param_spec_string ("path",
801 P_("The path within the backend where the settings are"),
803 G_PARAM_CONSTRUCT_ONLY |
804 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
807 * GSettings:has-unapplied:
809 * If this property is %TRUE, the #GSettings object has outstanding
810 * changes that will be applied when g_settings_apply() is called.
812 g_object_class_install_property (object_class, PROP_HAS_UNAPPLIED,
813 g_param_spec_boolean ("has-unapplied",
814 P_("Has unapplied changes"),
815 P_("TRUE if there are outstanding changes to apply()"),
817 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
820 * GSettings:delay-apply:
822 * Whether the #GSettings object is in 'delay-apply' mode. See
823 * g_settings_delay() for details.
827 g_object_class_install_property (object_class, PROP_DELAY_APPLY,
828 g_param_spec_boolean ("delay-apply",
829 P_("Delay-apply mode"),
830 P_("Whether this settings object is in 'delay-apply' mode"),
832 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
835 /* Construction (new, new_with_path, etc.) {{{1 */
838 * @schema_id: the id of the schema
840 * Creates a new #GSettings object with the schema specified by
843 * Signals on the newly created #GSettings object will be dispatched
844 * via the thread-default #GMainContext in effect at the time of the
845 * call to g_settings_new(). The new #GSettings will hold a reference
846 * on the context. See g_main_context_push_thread_default().
848 * Returns: a new #GSettings object
853 g_settings_new (const gchar *schema_id)
855 g_return_val_if_fail (schema_id != NULL, NULL);
857 return g_object_new (G_TYPE_SETTINGS,
858 "schema-id", schema_id,
863 path_is_valid (const gchar *path)
871 if (!g_str_has_suffix (path, "/"))
874 return strstr (path, "//") == NULL;
878 * g_settings_new_with_path:
879 * @schema_id: the id of the schema
880 * @path: the path to use
882 * Creates a new #GSettings object with the relocatable schema specified
883 * by @schema_id and a given path.
885 * You only need to do this if you want to directly create a settings
886 * object with a schema that doesn't have a specified path of its own.
889 * It is a programmer error to call this function for a schema that
890 * has an explicitly specified path.
892 * It is a programmer error if @path is not a valid path. A valid path
893 * begins and ends with '/' and does not contain two consecutive '/'
896 * Returns: a new #GSettings object
901 g_settings_new_with_path (const gchar *schema_id,
904 g_return_val_if_fail (schema_id != NULL, NULL);
905 g_return_val_if_fail (path_is_valid (path), NULL);
907 return g_object_new (G_TYPE_SETTINGS,
908 "schema-id", schema_id,
914 * g_settings_new_with_backend:
915 * @schema_id: the id of the schema
916 * @backend: the #GSettingsBackend to use
918 * Creates a new #GSettings object with the schema specified by
919 * @schema_id and a given #GSettingsBackend.
921 * Creating a #GSettings object with a different backend allows accessing
922 * settings from a database other than the usual one. For example, it may make
923 * sense to pass a backend corresponding to the "defaults" settings database on
924 * the system to get a settings object that modifies the system default
925 * settings instead of the settings for this user.
927 * Returns: a new #GSettings object
932 g_settings_new_with_backend (const gchar *schema_id,
933 GSettingsBackend *backend)
935 g_return_val_if_fail (schema_id != NULL, NULL);
936 g_return_val_if_fail (G_IS_SETTINGS_BACKEND (backend), NULL);
938 return g_object_new (G_TYPE_SETTINGS,
939 "schema-id", schema_id,
945 * g_settings_new_with_backend_and_path:
946 * @schema_id: the id of the schema
947 * @backend: the #GSettingsBackend to use
948 * @path: the path to use
950 * Creates a new #GSettings object with the schema specified by
951 * @schema_id and a given #GSettingsBackend and path.
953 * This is a mix of g_settings_new_with_backend() and
954 * g_settings_new_with_path().
956 * Returns: a new #GSettings object
961 g_settings_new_with_backend_and_path (const gchar *schema_id,
962 GSettingsBackend *backend,
965 g_return_val_if_fail (schema_id != NULL, NULL);
966 g_return_val_if_fail (G_IS_SETTINGS_BACKEND (backend), NULL);
967 g_return_val_if_fail (path_is_valid (path), NULL);
969 return g_object_new (G_TYPE_SETTINGS,
970 "schema-id", schema_id,
977 * g_settings_new_full:
978 * @schema: a #GSettingsSchema
979 * @backend: (allow-none): a #GSettingsBackend
980 * @path: (allow-none): the path to use
982 * Creates a new #GSettings object with a given schema, backend and
985 * It should be extremely rare that you ever want to use this function.
986 * It is made available for advanced use-cases (such as plugin systems
987 * that want to provide access to schemas loaded from custom locations,
990 * At the most basic level, a #GSettings object is a pure composition of
991 * 4 things: a #GSettingsSchema, a #GSettingsBackend, a path within that
992 * backend, and a #GMainContext to which signals are dispatched.
994 * This constructor therefore gives you full control over constructing
995 * #GSettings instances. The first 4 parameters are given directly as
996 * @schema, @backend and @path, and the main context is taken from the
997 * thread-default (as per g_settings_new()).
999 * If @backend is %NULL then the default backend is used.
1001 * If @path is %NULL then the path from the schema is used. It is an
1002 * error f @path is %NULL and the schema has no path of its own or if
1003 * @path is non-%NULL and not equal to the path that the schema does
1006 * Returns: a new #GSettings object
1011 g_settings_new_full (GSettingsSchema *schema,
1012 GSettingsBackend *backend,
1015 g_return_val_if_fail (schema != NULL, NULL);
1016 g_return_val_if_fail (backend == NULL || G_IS_SETTINGS_BACKEND (backend), NULL);
1017 g_return_val_if_fail (path == NULL || path_is_valid (path), NULL);
1019 return g_object_new (G_TYPE_SETTINGS,
1020 "settings-schema", schema,
1026 /* Internal read/write utilities {{{1 */
1028 g_settings_write_to_backend (GSettings *settings,
1029 GSettingsSchemaKey *key,
1035 path = g_strconcat (settings->priv->path, key->name, NULL);
1036 success = g_settings_backend_write (settings->priv->backend, path, value, NULL);
1043 g_settings_read_from_backend (GSettings *settings,
1044 GSettingsSchemaKey *key,
1045 gboolean user_value_only,
1046 gboolean default_value)
1052 path = g_strconcat (settings->priv->path, key->name, NULL);
1053 if (user_value_only)
1054 value = g_settings_backend_read_user_value (settings->priv->backend, path, key->type);
1056 value = g_settings_backend_read (settings->priv->backend, path, key->type, default_value);
1061 fixup = g_settings_schema_key_range_fixup (key, value);
1062 g_variant_unref (value);
1070 /* Public Get/Set API {{{1 (get, get_value, set, set_value, get_mapped) */
1072 * g_settings_get_value:
1073 * @settings: a #GSettings object
1074 * @key: the key to get the value for
1076 * Gets the value that is stored in @settings for @key.
1078 * It is a programmer error to give a @key that isn't contained in the
1079 * schema for @settings.
1081 * Returns: a new #GVariant
1086 g_settings_get_value (GSettings *settings,
1089 GSettingsSchemaKey skey;
1092 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
1093 g_return_val_if_fail (key != NULL, NULL);
1095 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1096 value = g_settings_read_from_backend (settings, &skey, FALSE, FALSE);
1099 value = g_settings_schema_key_get_translated_default (&skey);
1102 value = g_variant_ref (skey.default_value);
1104 g_settings_schema_key_clear (&skey);
1110 * g_settings_get_user_value:
1111 * @settings: a #GSettings object
1112 * @key: the key to get the user value for
1114 * Checks the "user value" of a key, if there is one.
1116 * The user value of a key is the last value that was set by the user.
1118 * After calling g_settings_reset() this function should always return
1119 * %NULL (assuming something is not wrong with the system
1122 * It is possible that g_settings_get_value() will return a different
1123 * value than this function. This can happen in the case that the user
1124 * set a value for a key that was subsequently locked down by the system
1125 * administrator -- this function will return the user's old value.
1127 * This function may be useful for adding a "reset" option to a UI or
1128 * for providing indication that a particular value has been changed.
1130 * It is a programmer error to give a @key that isn't contained in the
1131 * schema for @settings.
1133 * Returns: (allow-none) (transfer full): the user's value, if set
1138 g_settings_get_user_value (GSettings *settings,
1141 GSettingsSchemaKey skey;
1144 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
1145 g_return_val_if_fail (key != NULL, NULL);
1147 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1148 value = g_settings_read_from_backend (settings, &skey, TRUE, FALSE);
1149 g_settings_schema_key_clear (&skey);
1155 * g_settings_get_default_value:
1156 * @settings: a #GSettings object
1157 * @key: the key to get the default value for
1159 * Gets the "default value" of a key.
1161 * This is the value that would be read if g_settings_reset() were to be
1162 * called on the key.
1164 * Note that this may be a different value than returned by
1165 * g_settings_schema_key_get_default_value() if the system administrator
1166 * has provided a default value.
1168 * Comparing the return values of g_settings_get_default_value() and
1169 * g_settings_get_value() is not sufficient for determining if a value
1170 * has been set because the user may have explicitly set the value to
1171 * something that happens to be equal to the default. The difference
1172 * here is that if the default changes in the future, the user's key
1173 * will still be set.
1175 * This function may be useful for adding an indication to a UI of what
1176 * the default value was before the user set it.
1178 * It is a programmer error to give a @key that isn't contained in the
1179 * schema for @settings.
1181 * Returns: (allow-none) (transfer full): the default value
1186 g_settings_get_default_value (GSettings *settings,
1189 GSettingsSchemaKey skey;
1192 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
1193 g_return_val_if_fail (key != NULL, NULL);
1195 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1196 value = g_settings_read_from_backend (settings, &skey, FALSE, TRUE);
1199 value = g_settings_schema_key_get_translated_default (&skey);
1202 value = g_variant_ref (skey.default_value);
1204 g_settings_schema_key_clear (&skey);
1210 * g_settings_get_enum:
1211 * @settings: a #GSettings object
1212 * @key: the key to get the value for
1214 * Gets the value that is stored in @settings for @key and converts it
1215 * to the enum value that it represents.
1217 * In order to use this function the type of the value must be a string
1218 * and it must be marked in the schema file as an enumerated type.
1220 * It is a programmer error to give a @key that isn't contained in the
1221 * schema for @settings or is not marked as an enumerated type.
1223 * If the value stored in the configuration database is not a valid
1224 * value for the enumerated type then this function will return the
1227 * Returns: the enum value
1232 g_settings_get_enum (GSettings *settings,
1235 GSettingsSchemaKey skey;
1239 g_return_val_if_fail (G_IS_SETTINGS (settings), -1);
1240 g_return_val_if_fail (key != NULL, -1);
1242 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1246 g_critical ("g_settings_get_enum() called on key '%s' which is not "
1247 "associated with an enumerated type", skey.name);
1248 g_settings_schema_key_clear (&skey);
1252 value = g_settings_read_from_backend (settings, &skey, FALSE, FALSE);
1255 value = g_settings_schema_key_get_translated_default (&skey);
1258 value = g_variant_ref (skey.default_value);
1260 result = g_settings_schema_key_to_enum (&skey, value);
1261 g_settings_schema_key_clear (&skey);
1262 g_variant_unref (value);
1268 * g_settings_set_enum:
1269 * @settings: a #GSettings object
1270 * @key: a key, within @settings
1271 * @value: an enumerated value
1273 * Looks up the enumerated type nick for @value and writes it to @key,
1276 * It is a programmer error to give a @key that isn't contained in the
1277 * schema for @settings or is not marked as an enumerated type, or for
1278 * @value not to be a valid value for the named type.
1280 * After performing the write, accessing @key directly with
1281 * g_settings_get_string() will return the 'nick' associated with
1284 * Returns: %TRUE, if the set succeeds
1287 g_settings_set_enum (GSettings *settings,
1291 GSettingsSchemaKey skey;
1295 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
1296 g_return_val_if_fail (key != NULL, FALSE);
1298 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1302 g_critical ("g_settings_set_enum() called on key '%s' which is not "
1303 "associated with an enumerated type", skey.name);
1307 if (!(variant = g_settings_schema_key_from_enum (&skey, value)))
1309 g_critical ("g_settings_set_enum(): invalid enum value %d for key '%s' "
1310 "in schema '%s'. Doing nothing.", value, skey.name,
1311 g_settings_schema_get_id (skey.schema));
1312 g_settings_schema_key_clear (&skey);
1316 success = g_settings_write_to_backend (settings, &skey, variant);
1317 g_settings_schema_key_clear (&skey);
1323 * g_settings_get_flags:
1324 * @settings: a #GSettings object
1325 * @key: the key to get the value for
1327 * Gets the value that is stored in @settings for @key and converts it
1328 * to the flags value that it represents.
1330 * In order to use this function the type of the value must be an array
1331 * of strings and it must be marked in the schema file as an flags type.
1333 * It is a programmer error to give a @key that isn't contained in the
1334 * schema for @settings or is not marked as a flags type.
1336 * If the value stored in the configuration database is not a valid
1337 * value for the flags type then this function will return the default
1340 * Returns: the flags value
1345 g_settings_get_flags (GSettings *settings,
1348 GSettingsSchemaKey skey;
1352 g_return_val_if_fail (G_IS_SETTINGS (settings), -1);
1353 g_return_val_if_fail (key != NULL, -1);
1355 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1359 g_critical ("g_settings_get_flags() called on key '%s' which is not "
1360 "associated with a flags type", skey.name);
1361 g_settings_schema_key_clear (&skey);
1365 value = g_settings_read_from_backend (settings, &skey, FALSE, FALSE);
1368 value = g_settings_schema_key_get_translated_default (&skey);
1371 value = g_variant_ref (skey.default_value);
1373 result = g_settings_schema_key_to_flags (&skey, value);
1374 g_settings_schema_key_clear (&skey);
1375 g_variant_unref (value);
1381 * g_settings_set_flags:
1382 * @settings: a #GSettings object
1383 * @key: a key, within @settings
1384 * @value: a flags value
1386 * Looks up the flags type nicks for the bits specified by @value, puts
1387 * them in an array of strings and writes the array to @key, within
1390 * It is a programmer error to give a @key that isn't contained in the
1391 * schema for @settings or is not marked as a flags type, or for @value
1392 * to contain any bits that are not value for the named type.
1394 * After performing the write, accessing @key directly with
1395 * g_settings_get_strv() will return an array of 'nicks'; one for each
1398 * Returns: %TRUE, if the set succeeds
1401 g_settings_set_flags (GSettings *settings,
1405 GSettingsSchemaKey skey;
1409 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
1410 g_return_val_if_fail (key != NULL, FALSE);
1412 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1416 g_critical ("g_settings_set_flags() called on key '%s' which is not "
1417 "associated with a flags type", skey.name);
1421 if (!(variant = g_settings_schema_key_from_flags (&skey, value)))
1423 g_critical ("g_settings_set_flags(): invalid flags value 0x%08x "
1424 "for key '%s' in schema '%s'. Doing nothing.",
1425 value, skey.name, g_settings_schema_get_id (skey.schema));
1426 g_settings_schema_key_clear (&skey);
1430 success = g_settings_write_to_backend (settings, &skey, variant);
1431 g_settings_schema_key_clear (&skey);
1437 * g_settings_set_value:
1438 * @settings: a #GSettings object
1439 * @key: the name of the key to set
1440 * @value: a #GVariant of the correct type
1442 * Sets @key in @settings to @value.
1444 * It is a programmer error to give a @key that isn't contained in the
1445 * schema for @settings or for @value to have the incorrect type, per
1448 * If @value is floating then this function consumes the reference.
1450 * Returns: %TRUE if setting the key succeeded,
1451 * %FALSE if the key was not writable
1456 g_settings_set_value (GSettings *settings,
1460 GSettingsSchemaKey skey;
1463 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
1464 g_return_val_if_fail (key != NULL, FALSE);
1466 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1468 if (!g_settings_schema_key_type_check (&skey, value))
1470 g_critical ("g_settings_set_value: key '%s' in '%s' expects type '%s', but a GVariant of type '%s' was given",
1472 g_settings_schema_get_id (settings->priv->schema),
1473 g_variant_type_peek_string (skey.type),
1474 g_variant_get_type_string (value));
1479 if (!g_settings_schema_key_range_check (&skey, value))
1481 g_warning ("g_settings_set_value: value for key '%s' in schema '%s' "
1482 "is outside of valid range",
1484 g_settings_schema_get_id (settings->priv->schema));
1489 success = g_settings_write_to_backend (settings, &skey, value);
1490 g_settings_schema_key_clear (&skey);
1497 * @settings: a #GSettings object
1498 * @key: the key to get the value for
1499 * @format: a #GVariant format string
1500 * @...: arguments as per @format
1502 * Gets the value that is stored at @key in @settings.
1504 * A convenience function that combines g_settings_get_value() with
1507 * It is a programmer error to give a @key that isn't contained in the
1508 * schema for @settings or for the #GVariantType of @format to mismatch
1509 * the type given in the schema.
1514 g_settings_get (GSettings *settings,
1516 const gchar *format,
1522 value = g_settings_get_value (settings, key);
1524 if (strchr (format, '&'))
1526 g_critical ("%s: the format string may not contain '&' (key '%s' from schema '%s'). "
1527 "This call will probably stop working with a future version of glib.",
1528 G_STRFUNC, key, g_settings_schema_get_id (settings->priv->schema));
1531 va_start (ap, format);
1532 g_variant_get_va (value, format, NULL, &ap);
1535 g_variant_unref (value);
1540 * @settings: a #GSettings object
1541 * @key: the name of the key to set
1542 * @format: a #GVariant format string
1543 * @...: arguments as per @format
1545 * Sets @key in @settings to @value.
1547 * A convenience function that combines g_settings_set_value() with
1550 * It is a programmer error to give a @key that isn't contained in the
1551 * schema for @settings or for the #GVariantType of @format to mismatch
1552 * the type given in the schema.
1554 * Returns: %TRUE if setting the key succeeded,
1555 * %FALSE if the key was not writable
1560 g_settings_set (GSettings *settings,
1562 const gchar *format,
1568 va_start (ap, format);
1569 value = g_variant_new_va (format, NULL, &ap);
1572 return g_settings_set_value (settings, key, value);
1576 * g_settings_get_mapped:
1577 * @settings: a #GSettings object
1578 * @key: the key to get the value for
1579 * @mapping: (scope call): the function to map the value in the
1580 * settings database to the value used by the application
1581 * @user_data: user data for @mapping
1583 * Gets the value that is stored at @key in @settings, subject to
1584 * application-level validation/mapping.
1586 * You should use this function when the application needs to perform
1587 * some processing on the value of the key (for example, parsing). The
1588 * @mapping function performs that processing. If the function
1589 * indicates that the processing was unsuccessful (due to a parse error,
1590 * for example) then the mapping is tried again with another value.
1592 * This allows a robust 'fall back to defaults' behaviour to be
1593 * implemented somewhat automatically.
1595 * The first value that is tried is the user's setting for the key. If
1596 * the mapping function fails to map this value, other values may be
1597 * tried in an unspecified order (system or site defaults, translated
1598 * schema default values, untranslated schema default values, etc).
1600 * If the mapping function fails for all possible values, one additional
1601 * attempt is made: the mapping function is called with a %NULL value.
1602 * If the mapping function still indicates failure at this point then
1603 * the application will be aborted.
1605 * The result parameter for the @mapping function is pointed to a
1606 * #gpointer which is initially set to %NULL. The same pointer is given
1607 * to each invocation of @mapping. The final value of that #gpointer is
1608 * what is returned by this function. %NULL is valid; it is returned
1609 * just as any other value would be.
1611 * Returns: (transfer full): the result, which may be %NULL
1614 g_settings_get_mapped (GSettings *settings,
1616 GSettingsGetMapping mapping,
1619 gpointer result = NULL;
1620 GSettingsSchemaKey skey;
1624 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
1625 g_return_val_if_fail (key != NULL, NULL);
1626 g_return_val_if_fail (mapping != NULL, NULL);
1628 g_settings_schema_key_init (&skey, settings->priv->schema, key);
1630 if ((value = g_settings_read_from_backend (settings, &skey, FALSE, FALSE)))
1632 okay = mapping (value, &result, user_data);
1633 g_variant_unref (value);
1634 if (okay) goto okay;
1637 if ((value = g_settings_schema_key_get_translated_default (&skey)))
1639 okay = mapping (value, &result, user_data);
1640 g_variant_unref (value);
1641 if (okay) goto okay;
1644 if (mapping (skey.default_value, &result, user_data))
1647 if (!mapping (NULL, &result, user_data))
1648 g_error ("The mapping function given to g_settings_get_mapped() for key "
1649 "'%s' in schema '%s' returned FALSE when given a NULL value.",
1650 key, g_settings_schema_get_id (settings->priv->schema));
1653 g_settings_schema_key_clear (&skey);
1658 /* Convenience API (get, set_string, int, double, boolean, strv) {{{1 */
1660 * g_settings_get_string:
1661 * @settings: a #GSettings object
1662 * @key: the key to get the value for
1664 * Gets the value that is stored at @key in @settings.
1666 * A convenience variant of g_settings_get() for strings.
1668 * It is a programmer error to give a @key that isn't specified as
1669 * having a string type in the schema for @settings.
1671 * Returns: a newly-allocated string
1676 g_settings_get_string (GSettings *settings,
1682 value = g_settings_get_value (settings, key);
1683 result = g_variant_dup_string (value, NULL);
1684 g_variant_unref (value);
1690 * g_settings_set_string:
1691 * @settings: a #GSettings object
1692 * @key: the name of the key to set
1693 * @value: the value to set it to
1695 * Sets @key in @settings to @value.
1697 * A convenience variant of g_settings_set() for strings.
1699 * It is a programmer error to give a @key that isn't specified as
1700 * having a string type in the schema for @settings.
1702 * Returns: %TRUE if setting the key succeeded,
1703 * %FALSE if the key was not writable
1708 g_settings_set_string (GSettings *settings,
1712 return g_settings_set_value (settings, key, g_variant_new_string (value));
1716 * g_settings_get_int:
1717 * @settings: a #GSettings object
1718 * @key: the key to get the value for
1720 * Gets the value that is stored at @key in @settings.
1722 * A convenience variant of g_settings_get() for 32-bit integers.
1724 * It is a programmer error to give a @key that isn't specified as
1725 * having a int32 type in the schema for @settings.
1727 * Returns: an integer
1732 g_settings_get_int (GSettings *settings,
1738 value = g_settings_get_value (settings, key);
1739 result = g_variant_get_int32 (value);
1740 g_variant_unref (value);
1746 * g_settings_set_int:
1747 * @settings: a #GSettings object
1748 * @key: the name of the key to set
1749 * @value: the value to set it to
1751 * Sets @key in @settings to @value.
1753 * A convenience variant of g_settings_set() for 32-bit integers.
1755 * It is a programmer error to give a @key that isn't specified as
1756 * having a int32 type in the schema for @settings.
1758 * Returns: %TRUE if setting the key succeeded,
1759 * %FALSE if the key was not writable
1764 g_settings_set_int (GSettings *settings,
1768 return g_settings_set_value (settings, key, g_variant_new_int32 (value));
1772 * g_settings_get_uint:
1773 * @settings: a #GSettings object
1774 * @key: the key to get the value for
1776 * Gets the value that is stored at @key in @settings.
1778 * A convenience variant of g_settings_get() for 32-bit unsigned
1781 * It is a programmer error to give a @key that isn't specified as
1782 * having a uint32 type in the schema for @settings.
1784 * Returns: an unsigned integer
1789 g_settings_get_uint (GSettings *settings,
1795 value = g_settings_get_value (settings, key);
1796 result = g_variant_get_uint32 (value);
1797 g_variant_unref (value);
1803 * g_settings_set_uint:
1804 * @settings: a #GSettings object
1805 * @key: the name of the key to set
1806 * @value: the value to set it to
1808 * Sets @key in @settings to @value.
1810 * A convenience variant of g_settings_set() for 32-bit unsigned
1813 * It is a programmer error to give a @key that isn't specified as
1814 * having a uint32 type in the schema for @settings.
1816 * Returns: %TRUE if setting the key succeeded,
1817 * %FALSE if the key was not writable
1822 g_settings_set_uint (GSettings *settings,
1826 return g_settings_set_value (settings, key, g_variant_new_uint32 (value));
1830 * g_settings_get_double:
1831 * @settings: a #GSettings object
1832 * @key: the key to get the value for
1834 * Gets the value that is stored at @key in @settings.
1836 * A convenience variant of g_settings_get() for doubles.
1838 * It is a programmer error to give a @key that isn't specified as
1839 * having a 'double' type in the schema for @settings.
1846 g_settings_get_double (GSettings *settings,
1852 value = g_settings_get_value (settings, key);
1853 result = g_variant_get_double (value);
1854 g_variant_unref (value);
1860 * g_settings_set_double:
1861 * @settings: a #GSettings object
1862 * @key: the name of the key to set
1863 * @value: the value to set it to
1865 * Sets @key in @settings to @value.
1867 * A convenience variant of g_settings_set() for doubles.
1869 * It is a programmer error to give a @key that isn't specified as
1870 * having a 'double' type in the schema for @settings.
1872 * Returns: %TRUE if setting the key succeeded,
1873 * %FALSE if the key was not writable
1878 g_settings_set_double (GSettings *settings,
1882 return g_settings_set_value (settings, key, g_variant_new_double (value));
1886 * g_settings_get_boolean:
1887 * @settings: a #GSettings object
1888 * @key: the key to get the value for
1890 * Gets the value that is stored at @key in @settings.
1892 * A convenience variant of g_settings_get() for booleans.
1894 * It is a programmer error to give a @key that isn't specified as
1895 * having a boolean type in the schema for @settings.
1897 * Returns: a boolean
1902 g_settings_get_boolean (GSettings *settings,
1908 value = g_settings_get_value (settings, key);
1909 result = g_variant_get_boolean (value);
1910 g_variant_unref (value);
1916 * g_settings_set_boolean:
1917 * @settings: a #GSettings object
1918 * @key: the name of the key to set
1919 * @value: the value to set it to
1921 * Sets @key in @settings to @value.
1923 * A convenience variant of g_settings_set() for booleans.
1925 * It is a programmer error to give a @key that isn't specified as
1926 * having a boolean type in the schema for @settings.
1928 * Returns: %TRUE if setting the key succeeded,
1929 * %FALSE if the key was not writable
1934 g_settings_set_boolean (GSettings *settings,
1938 return g_settings_set_value (settings, key, g_variant_new_boolean (value));
1942 * g_settings_get_strv:
1943 * @settings: a #GSettings object
1944 * @key: the key to get the value for
1946 * A convenience variant of g_settings_get() for string arrays.
1948 * It is a programmer error to give a @key that isn't specified as
1949 * having an array of strings type in the schema for @settings.
1951 * Returns: (array zero-terminated=1) (transfer full): a
1952 * newly-allocated, %NULL-terminated array of strings, the value that
1953 * is stored at @key in @settings.
1958 g_settings_get_strv (GSettings *settings,
1964 value = g_settings_get_value (settings, key);
1965 result = g_variant_dup_strv (value, NULL);
1966 g_variant_unref (value);
1972 * g_settings_set_strv:
1973 * @settings: a #GSettings object
1974 * @key: the name of the key to set
1975 * @value: (allow-none) (array zero-terminated=1): the value to set it to, or %NULL
1977 * Sets @key in @settings to @value.
1979 * A convenience variant of g_settings_set() for string arrays. If
1980 * @value is %NULL, then @key is set to be the empty array.
1982 * It is a programmer error to give a @key that isn't specified as
1983 * having an array of strings type in the schema for @settings.
1985 * Returns: %TRUE if setting the key succeeded,
1986 * %FALSE if the key was not writable
1991 g_settings_set_strv (GSettings *settings,
1993 const gchar * const *value)
1998 array = g_variant_new_strv (value, -1);
2000 array = g_variant_new_strv (NULL, 0);
2002 return g_settings_set_value (settings, key, array);
2005 /* Delayed apply (delay, apply, revert, get_has_unapplied) {{{1 */
2008 * @settings: a #GSettings object
2010 * Changes the #GSettings object into 'delay-apply' mode. In this
2011 * mode, changes to @settings are not immediately propagated to the
2012 * backend, but kept locally until g_settings_apply() is called.
2017 g_settings_delay (GSettings *settings)
2019 g_return_if_fail (G_IS_SETTINGS (settings));
2021 if (settings->priv->delayed)
2024 settings->priv->delayed =
2025 g_delayed_settings_backend_new (settings->priv->backend,
2027 settings->priv->main_context);
2028 g_settings_backend_unwatch (settings->priv->backend, G_OBJECT (settings));
2029 g_object_unref (settings->priv->backend);
2031 settings->priv->backend = G_SETTINGS_BACKEND (settings->priv->delayed);
2032 g_settings_backend_watch (settings->priv->backend,
2033 &listener_vtable, G_OBJECT (settings),
2034 settings->priv->main_context);
2036 g_object_notify (G_OBJECT (settings), "delay-apply");
2041 * @settings: a #GSettings instance
2043 * Applies any changes that have been made to the settings. This
2044 * function does nothing unless @settings is in 'delay-apply' mode;
2045 * see g_settings_delay(). In the normal case settings are always
2046 * applied immediately.
2049 g_settings_apply (GSettings *settings)
2051 if (settings->priv->delayed)
2053 GDelayedSettingsBackend *delayed;
2055 delayed = G_DELAYED_SETTINGS_BACKEND (settings->priv->backend);
2056 g_delayed_settings_backend_apply (delayed);
2061 * g_settings_revert:
2062 * @settings: a #GSettings instance
2064 * Reverts all non-applied changes to the settings. This function
2065 * does nothing unless @settings is in 'delay-apply' mode; see
2066 * g_settings_delay(). In the normal case settings are always applied
2069 * Change notifications will be emitted for affected keys.
2072 g_settings_revert (GSettings *settings)
2074 if (settings->priv->delayed)
2076 GDelayedSettingsBackend *delayed;
2078 delayed = G_DELAYED_SETTINGS_BACKEND (settings->priv->backend);
2079 g_delayed_settings_backend_revert (delayed);
2084 * g_settings_get_has_unapplied:
2085 * @settings: a #GSettings object
2087 * Returns whether the #GSettings object has any unapplied
2088 * changes. This can only be the case if it is in 'delayed-apply' mode.
2090 * Returns: %TRUE if @settings has unapplied changes
2095 g_settings_get_has_unapplied (GSettings *settings)
2097 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
2099 return settings->priv->delayed &&
2100 g_delayed_settings_backend_get_has_unapplied (
2101 G_DELAYED_SETTINGS_BACKEND (settings->priv->backend));
2104 /* Extra API (reset, sync, get_child, is_writable, list_*, ranges) {{{1 */
2107 * @settings: a #GSettings object
2108 * @key: the name of a key
2110 * Resets @key to its default value.
2112 * This call resets the key, as much as possible, to its default value.
2113 * That might the value specified in the schema or the one set by the
2117 g_settings_reset (GSettings *settings,
2122 path = g_strconcat (settings->priv->path, key, NULL);
2123 g_settings_backend_reset (settings->priv->backend, path, NULL);
2130 * Ensures that all pending operations for the given are complete for
2131 * the default backend.
2133 * Writes made to a #GSettings are handled asynchronously. For this
2134 * reason, it is very unlikely that the changes have it to disk by the
2135 * time g_settings_set() returns.
2137 * This call will block until all of the writes have made it to the
2138 * backend. Since the mainloop is not running, no change notifications
2139 * will be dispatched during this call (but some may be queued by the
2140 * time the call is done).
2143 g_settings_sync (void)
2145 g_settings_backend_sync_default ();
2149 * g_settings_is_writable:
2150 * @settings: a #GSettings object
2151 * @name: the name of a key
2153 * Finds out if a key can be written or not
2155 * Returns: %TRUE if the key @name is writable
2160 g_settings_is_writable (GSettings *settings,
2166 g_return_val_if_fail (G_IS_SETTINGS (settings), FALSE);
2168 path = g_strconcat (settings->priv->path, name, NULL);
2169 writable = g_settings_backend_get_writable (settings->priv->backend, path);
2176 * g_settings_get_child:
2177 * @settings: a #GSettings object
2178 * @name: the name of the 'child' schema
2180 * Creates a 'child' settings object which has a base path of
2181 * <replaceable>base-path</replaceable>/@name, where
2182 * <replaceable>base-path</replaceable> is the base path of @settings.
2184 * The schema for the child settings object must have been declared
2185 * in the schema of @settings using a <tag class="starttag">child</tag> element.
2187 * Returns: (transfer full): a 'child' settings object
2192 g_settings_get_child (GSettings *settings,
2195 const gchar *child_schema;
2200 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
2202 child_name = g_strconcat (name, "/", NULL);
2203 child_schema = g_settings_schema_get_string (settings->priv->schema,
2205 if (child_schema == NULL)
2206 g_error ("Schema '%s' has no child '%s'",
2207 g_settings_schema_get_id (settings->priv->schema), name);
2209 child_path = g_strconcat (settings->priv->path, child_name, NULL);
2210 child = g_object_new (G_TYPE_SETTINGS,
2211 "backend", settings->priv->backend,
2212 "schema-id", child_schema,
2215 g_free (child_path);
2216 g_free (child_name);
2222 * g_settings_list_keys:
2223 * @settings: a #GSettings object
2225 * Introspects the list of keys on @settings.
2227 * You should probably not be calling this function from "normal" code
2228 * (since you should already know what keys are in your schema). This
2229 * function is intended for introspection reasons.
2231 * You should free the return value with g_strfreev() when you are done
2234 * Returns: (transfer full) (element-type utf8): a list of the keys on @settings
2237 g_settings_list_keys (GSettings *settings)
2244 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
2245 strv = g_new (gchar *, n_keys + 1);
2246 for (i = j = 0; i < n_keys; i++)
2248 const gchar *key = g_quark_to_string (keys[i]);
2250 if (!g_str_has_suffix (key, "/"))
2251 strv[j++] = g_strdup (key);
2259 * g_settings_list_children:
2260 * @settings: a #GSettings object
2262 * Gets the list of children on @settings.
2264 * The list is exactly the list of strings for which it is not an error
2265 * to call g_settings_get_child().
2267 * For GSettings objects that are lists, this value can change at any
2268 * time and you should connect to the "children-changed" signal to watch
2269 * for those changes. Note that there is a race condition here: you may
2270 * request a child after listing it only for it to have been destroyed
2271 * in the meantime. For this reason, g_settings_get_child() may return
2272 * %NULL even for a child that was listed by this function.
2274 * For GSettings objects that are not lists, you should probably not be
2275 * calling this function from "normal" code (since you should already
2276 * know what children are in your schema). This function may still be
2277 * useful there for introspection reasons, however.
2279 * You should free the return value with g_strfreev() when you are done
2282 * Returns: (transfer full) (element-type utf8): a list of the children on @settings
2285 g_settings_list_children (GSettings *settings)
2292 keys = g_settings_schema_list (settings->priv->schema, &n_keys);
2293 strv = g_new (gchar *, n_keys + 1);
2294 for (i = j = 0; i < n_keys; i++)
2296 const gchar *key = g_quark_to_string (keys[i]);
2298 if (g_str_has_suffix (key, "/"))
2300 gint length = strlen (key);
2302 strv[j] = g_memdup (key, length);
2303 strv[j][length - 1] = '\0';
2313 * g_settings_get_range:
2314 * @settings: a #GSettings
2315 * @key: the key to query the range of
2317 * Queries the range of a key.
2321 * Deprecated:2.40:Use g_settings_schema_key_get_range() instead.
2324 g_settings_get_range (GSettings *settings,
2327 GSettingsSchemaKey skey;
2330 g_settings_schema_key_init (&skey, settings->priv->schema, key);
2331 range = g_settings_schema_key_get_range (&skey);
2332 g_settings_schema_key_clear (&skey);
2338 * g_settings_range_check:
2339 * @settings: a #GSettings
2340 * @key: the key to check
2341 * @value: the value to check
2343 * Checks if the given @value is of the correct type and within the
2344 * permitted range for @key.
2346 * Returns: %TRUE if @value is valid for @key
2350 * Deprecated:2.40:Use g_settings_schema_key_range_check() instead.
2353 g_settings_range_check (GSettings *settings,
2357 GSettingsSchemaKey skey;
2360 g_settings_schema_key_init (&skey, settings->priv->schema, key);
2361 good = g_settings_schema_key_range_check (&skey, value);
2362 g_settings_schema_key_clear (&skey);
2370 GSettingsSchemaKey key;
2371 GSettings *settings;
2374 GSettingsBindGetMapping get_mapping;
2375 GSettingsBindSetMapping set_mapping;
2377 GDestroyNotify destroy;
2379 guint writable_handler_id;
2380 guint property_handler_id;
2381 const GParamSpec *property;
2382 guint key_handler_id;
2384 /* prevent recursion */
2389 g_settings_binding_free (gpointer data)
2391 GSettingsBinding *binding = data;
2393 g_assert (!binding->running);
2395 if (binding->writable_handler_id)
2396 g_signal_handler_disconnect (binding->settings,
2397 binding->writable_handler_id);
2399 if (binding->key_handler_id)
2400 g_signal_handler_disconnect (binding->settings,
2401 binding->key_handler_id);
2403 if (g_signal_handler_is_connected (binding->object,
2404 binding->property_handler_id))
2405 g_signal_handler_disconnect (binding->object,
2406 binding->property_handler_id);
2408 g_settings_schema_key_clear (&binding->key);
2410 if (binding->destroy)
2411 binding->destroy (binding->user_data);
2413 g_object_unref (binding->settings);
2415 g_slice_free (GSettingsBinding, binding);
2419 g_settings_binding_quark (const char *property)
2424 tmp = g_strdup_printf ("gsettingsbinding-%s", property);
2425 quark = g_quark_from_string (tmp);
2432 g_settings_binding_key_changed (GSettings *settings,
2436 GSettingsBinding *binding = user_data;
2437 GValue value = G_VALUE_INIT;
2440 g_assert (settings == binding->settings);
2441 g_assert (key == binding->key.name);
2443 if (binding->running)
2446 binding->running = TRUE;
2448 g_value_init (&value, binding->property->value_type);
2450 variant = g_settings_read_from_backend (binding->settings, &binding->key, FALSE, FALSE);
2451 if (variant && !binding->get_mapping (&value, variant, binding->user_data))
2453 /* silently ignore errors in the user's config database */
2454 g_variant_unref (variant);
2458 if (variant == NULL)
2460 variant = g_settings_schema_key_get_translated_default (&binding->key);
2462 !binding->get_mapping (&value, variant, binding->user_data))
2464 /* flag translation errors with a warning */
2465 g_warning ("Translated default '%s' for key '%s' in schema '%s' "
2466 "was rejected by the binding mapping function",
2467 binding->key.unparsed, binding->key.name,
2468 g_settings_schema_get_id (binding->key.schema));
2469 g_variant_unref (variant);
2474 if (variant == NULL)
2476 variant = g_variant_ref (binding->key.default_value);
2477 if (!binding->get_mapping (&value, variant, binding->user_data))
2478 g_error ("The schema default value for key '%s' in schema '%s' "
2479 "was rejected by the binding mapping function.",
2480 binding->key.name, g_settings_schema_get_id (binding->key.schema));
2483 g_object_set_property (binding->object, binding->property->name, &value);
2484 g_variant_unref (variant);
2485 g_value_unset (&value);
2487 binding->running = FALSE;
2491 g_settings_binding_property_changed (GObject *object,
2492 const GParamSpec *pspec,
2495 GSettingsBinding *binding = user_data;
2496 GValue value = G_VALUE_INIT;
2499 g_assert (object == binding->object);
2500 g_assert (pspec == binding->property);
2502 if (binding->running)
2505 binding->running = TRUE;
2507 g_value_init (&value, pspec->value_type);
2508 g_object_get_property (object, pspec->name, &value);
2509 if ((variant = binding->set_mapping (&value, binding->key.type,
2510 binding->user_data)))
2512 g_variant_take_ref (variant);
2514 if (!g_settings_schema_key_type_check (&binding->key, variant))
2516 g_critical ("binding mapping function for key '%s' returned "
2517 "GVariant of type '%s' when type '%s' was requested",
2518 binding->key.name, g_variant_get_type_string (variant),
2519 g_variant_type_dup_string (binding->key.type));
2523 if (!g_settings_schema_key_range_check (&binding->key, variant))
2525 g_critical ("GObject property '%s' on a '%s' object is out of "
2526 "schema-specified range for key '%s' of '%s': %s",
2527 binding->property->name, g_type_name (binding->property->owner_type),
2528 binding->key.name, g_settings_schema_get_id (binding->key.schema),
2529 g_variant_print (variant, TRUE));
2533 g_settings_write_to_backend (binding->settings, &binding->key, variant);
2534 g_variant_unref (variant);
2536 g_value_unset (&value);
2538 binding->running = FALSE;
2542 g_settings_bind_invert_boolean_get_mapping (GValue *value,
2546 g_value_set_boolean (value, !g_variant_get_boolean (variant));
2551 g_settings_bind_invert_boolean_set_mapping (const GValue *value,
2552 const GVariantType *expected_type,
2555 return g_variant_new_boolean (!g_value_get_boolean (value));
2560 * @settings: a #GSettings object
2561 * @key: the key to bind
2562 * @object: (type GObject.Object): a #GObject
2563 * @property: the name of the property to bind
2564 * @flags: flags for the binding
2566 * Create a binding between the @key in the @settings object
2567 * and the property @property of @object.
2569 * The binding uses the default GIO mapping functions to map
2570 * between the settings and property values. These functions
2571 * handle booleans, numeric types and string types in a
2572 * straightforward way. Use g_settings_bind_with_mapping() if
2573 * you need a custom mapping, or map between types that are not
2574 * supported by the default mapping functions.
2576 * Unless the @flags include %G_SETTINGS_BIND_NO_SENSITIVITY, this
2577 * function also establishes a binding between the writability of
2578 * @key and the "sensitive" property of @object (if @object has
2579 * a boolean property by that name). See g_settings_bind_writable()
2580 * for more details about writable bindings.
2582 * Note that the lifecycle of the binding is tied to the object,
2583 * and that you can have only one binding per object property.
2584 * If you bind the same property twice on the same object, the second
2585 * binding overrides the first one.
2590 g_settings_bind (GSettings *settings,
2593 const gchar *property,
2594 GSettingsBindFlags flags)
2596 GSettingsBindGetMapping get_mapping = NULL;
2597 GSettingsBindSetMapping set_mapping = NULL;
2599 if (flags & G_SETTINGS_BIND_INVERT_BOOLEAN)
2601 get_mapping = g_settings_bind_invert_boolean_get_mapping;
2602 set_mapping = g_settings_bind_invert_boolean_set_mapping;
2604 /* can't pass this flag to g_settings_bind_with_mapping() */
2605 flags &= ~G_SETTINGS_BIND_INVERT_BOOLEAN;
2608 g_settings_bind_with_mapping (settings, key, object, property, flags,
2609 get_mapping, set_mapping, NULL, NULL);
2613 * g_settings_bind_with_mapping: (skip)
2614 * @settings: a #GSettings object
2615 * @key: the key to bind
2616 * @object: (type GObject.Object): a #GObject
2617 * @property: the name of the property to bind
2618 * @flags: flags for the binding
2619 * @get_mapping: a function that gets called to convert values
2620 * from @settings to @object, or %NULL to use the default GIO mapping
2621 * @set_mapping: a function that gets called to convert values
2622 * from @object to @settings, or %NULL to use the default GIO mapping
2623 * @user_data: data that gets passed to @get_mapping and @set_mapping
2624 * @destroy: #GDestroyNotify function for @user_data
2626 * Create a binding between the @key in the @settings object
2627 * and the property @property of @object.
2629 * The binding uses the provided mapping functions to map between
2630 * settings and property values.
2632 * Note that the lifecycle of the binding is tied to the object,
2633 * and that you can have only one binding per object property.
2634 * If you bind the same property twice on the same object, the second
2635 * binding overrides the first one.
2640 g_settings_bind_with_mapping (GSettings *settings,
2643 const gchar *property,
2644 GSettingsBindFlags flags,
2645 GSettingsBindGetMapping get_mapping,
2646 GSettingsBindSetMapping set_mapping,
2648 GDestroyNotify destroy)
2650 GSettingsBinding *binding;
2651 GObjectClass *objectclass;
2652 gchar *detailed_signal;
2653 GQuark binding_quark;
2655 g_return_if_fail (G_IS_SETTINGS (settings));
2656 g_return_if_fail (key != NULL);
2657 g_return_if_fail (G_IS_OBJECT (object));
2658 g_return_if_fail (property != NULL);
2659 g_return_if_fail (~flags & G_SETTINGS_BIND_INVERT_BOOLEAN);
2661 objectclass = G_OBJECT_GET_CLASS (object);
2663 binding = g_slice_new0 (GSettingsBinding);
2664 g_settings_schema_key_init (&binding->key, settings->priv->schema, key);
2665 binding->settings = g_object_ref (settings);
2666 binding->object = object;
2667 binding->property = g_object_class_find_property (objectclass, property);
2668 binding->user_data = user_data;
2669 binding->destroy = destroy;
2670 binding->get_mapping = get_mapping ? get_mapping : g_settings_get_mapping;
2671 binding->set_mapping = set_mapping ? set_mapping : g_settings_set_mapping;
2673 if (!(flags & (G_SETTINGS_BIND_GET | G_SETTINGS_BIND_SET)))
2674 flags |= G_SETTINGS_BIND_GET | G_SETTINGS_BIND_SET;
2676 if (binding->property == NULL)
2678 g_critical ("g_settings_bind: no property '%s' on class '%s'",
2679 property, G_OBJECT_TYPE_NAME (object));
2683 if ((flags & G_SETTINGS_BIND_GET) &&
2684 (binding->property->flags & G_PARAM_WRITABLE) == 0)
2686 g_critical ("g_settings_bind: property '%s' on class '%s' is not "
2687 "writable", binding->property->name, G_OBJECT_TYPE_NAME (object));
2690 if ((flags & G_SETTINGS_BIND_SET) &&
2691 (binding->property->flags & G_PARAM_READABLE) == 0)
2693 g_critical ("g_settings_bind: property '%s' on class '%s' is not "
2694 "readable", binding->property->name, G_OBJECT_TYPE_NAME (object));
2698 if (get_mapping == g_settings_bind_invert_boolean_get_mapping)
2700 /* g_settings_bind_invert_boolean_get_mapping() is a private
2701 * function, so if we are here it means that g_settings_bind() was
2702 * called with G_SETTINGS_BIND_INVERT_BOOLEAN.
2704 * Ensure that both sides are boolean.
2707 if (binding->property->value_type != G_TYPE_BOOLEAN)
2709 g_critical ("g_settings_bind: G_SETTINGS_BIND_INVERT_BOOLEAN "
2710 "was specified, but property '%s' on type '%s' has "
2711 "type '%s'", binding->property->name, G_OBJECT_TYPE_NAME (object),
2712 g_type_name ((binding->property->value_type)));
2716 if (!g_variant_type_equal (binding->key.type, G_VARIANT_TYPE_BOOLEAN))
2718 g_critical ("g_settings_bind: G_SETTINGS_BIND_INVERT_BOOLEAN "
2719 "was specified, but key '%s' on schema '%s' has "
2720 "type '%s'", key, g_settings_schema_get_id (settings->priv->schema),
2721 g_variant_type_dup_string (binding->key.type));
2727 else if (((get_mapping == NULL && (flags & G_SETTINGS_BIND_GET)) ||
2728 (set_mapping == NULL && (flags & G_SETTINGS_BIND_SET))) &&
2729 !g_settings_mapping_is_compatible (binding->property->value_type,
2732 g_critical ("g_settings_bind: property '%s' on class '%s' has type "
2733 "'%s' which is not compatible with type '%s' of key '%s' "
2734 "on schema '%s'", binding->property->name, G_OBJECT_TYPE_NAME (object),
2735 g_type_name (binding->property->value_type),
2736 g_variant_type_dup_string (binding->key.type), key,
2737 g_settings_schema_get_id (settings->priv->schema));
2741 if ((flags & G_SETTINGS_BIND_SET) &&
2742 (~flags & G_SETTINGS_BIND_NO_SENSITIVITY))
2744 GParamSpec *sensitive;
2746 sensitive = g_object_class_find_property (objectclass, "sensitive");
2748 if (sensitive && sensitive->value_type == G_TYPE_BOOLEAN &&
2749 (sensitive->flags & G_PARAM_WRITABLE))
2750 g_settings_bind_writable (settings, binding->key.name, object, "sensitive", FALSE);
2753 if (flags & G_SETTINGS_BIND_SET)
2755 detailed_signal = g_strdup_printf ("notify::%s", binding->property->name);
2756 binding->property_handler_id =
2757 g_signal_connect (object, detailed_signal,
2758 G_CALLBACK (g_settings_binding_property_changed),
2760 g_free (detailed_signal);
2762 if (~flags & G_SETTINGS_BIND_GET)
2763 g_settings_binding_property_changed (object,
2768 if (flags & G_SETTINGS_BIND_GET)
2770 if (~flags & G_SETTINGS_BIND_GET_NO_CHANGES)
2772 detailed_signal = g_strdup_printf ("changed::%s", key);
2773 binding->key_handler_id =
2774 g_signal_connect (settings, detailed_signal,
2775 G_CALLBACK (g_settings_binding_key_changed),
2777 g_free (detailed_signal);
2780 g_settings_binding_key_changed (settings, binding->key.name, binding);
2783 binding_quark = g_settings_binding_quark (binding->property->name);
2784 g_object_set_qdata_full (object, binding_quark,
2785 binding, g_settings_binding_free);
2788 /* Writability binding {{{1 */
2791 GSettings *settings;
2794 const gchar *property;
2797 } GSettingsWritableBinding;
2800 g_settings_writable_binding_free (gpointer data)
2802 GSettingsWritableBinding *binding = data;
2804 g_signal_handler_disconnect (binding->settings, binding->handler_id);
2805 g_object_unref (binding->settings);
2806 g_slice_free (GSettingsWritableBinding, binding);
2810 g_settings_binding_writable_changed (GSettings *settings,
2814 GSettingsWritableBinding *binding = user_data;
2817 g_assert (settings == binding->settings);
2818 g_assert (key == binding->key);
2820 writable = g_settings_is_writable (settings, key);
2822 if (binding->inverted)
2823 writable = !writable;
2825 g_object_set (binding->object, binding->property, writable, NULL);
2829 * g_settings_bind_writable:
2830 * @settings: a #GSettings object
2831 * @key: the key to bind
2832 * @object: (type GObject.Object):a #GObject
2833 * @property: the name of a boolean property to bind
2834 * @inverted: whether to 'invert' the value
2836 * Create a binding between the writability of @key in the
2837 * @settings object and the property @property of @object.
2838 * The property must be boolean; "sensitive" or "visible"
2839 * properties of widgets are the most likely candidates.
2841 * Writable bindings are always uni-directional; changes of the
2842 * writability of the setting will be propagated to the object
2843 * property, not the other way.
2845 * When the @inverted argument is %TRUE, the binding inverts the
2846 * value as it passes from the setting to the object, i.e. @property
2847 * will be set to %TRUE if the key is not writable.
2849 * Note that the lifecycle of the binding is tied to the object,
2850 * and that you can have only one binding per object property.
2851 * If you bind the same property twice on the same object, the second
2852 * binding overrides the first one.
2857 g_settings_bind_writable (GSettings *settings,
2860 const gchar *property,
2863 GSettingsWritableBinding *binding;
2864 gchar *detailed_signal;
2867 g_return_if_fail (G_IS_SETTINGS (settings));
2869 pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), property);
2872 g_critical ("g_settings_bind_writable: no property '%s' on class '%s'",
2873 property, G_OBJECT_TYPE_NAME (object));
2876 if ((pspec->flags & G_PARAM_WRITABLE) == 0)
2878 g_critical ("g_settings_bind_writable: property '%s' on class '%s' is not writable",
2879 property, G_OBJECT_TYPE_NAME (object));
2883 binding = g_slice_new (GSettingsWritableBinding);
2884 binding->settings = g_object_ref (settings);
2885 binding->object = object;
2886 binding->key = g_intern_string (key);
2887 binding->property = g_intern_string (property);
2888 binding->inverted = inverted;
2890 detailed_signal = g_strdup_printf ("writable-changed::%s", key);
2891 binding->handler_id =
2892 g_signal_connect (settings, detailed_signal,
2893 G_CALLBACK (g_settings_binding_writable_changed),
2895 g_free (detailed_signal);
2897 g_object_set_qdata_full (object, g_settings_binding_quark (property),
2898 binding, g_settings_writable_binding_free);
2900 g_settings_binding_writable_changed (settings, binding->key, binding);
2904 * g_settings_unbind:
2905 * @object: the object
2906 * @property: the property whose binding is removed
2908 * Removes an existing binding for @property on @object.
2910 * Note that bindings are automatically removed when the
2911 * object is finalized, so it is rarely necessary to call this
2917 g_settings_unbind (gpointer object,
2918 const gchar *property)
2920 GQuark binding_quark;
2922 binding_quark = g_settings_binding_quark (property);
2923 g_object_set_qdata (object, binding_quark, NULL);
2930 GObject parent_instance;
2932 GSettingsSchemaKey key;
2933 GSettings *settings;
2936 typedef GObjectClass GSettingsActionClass;
2938 static GType g_settings_action_get_type (void);
2939 static void g_settings_action_iface_init (GActionInterface *iface);
2940 G_DEFINE_TYPE_WITH_CODE (GSettingsAction, g_settings_action, G_TYPE_OBJECT,
2941 G_IMPLEMENT_INTERFACE (G_TYPE_ACTION, g_settings_action_iface_init))
2947 ACTION_PROP_PARAMETER_TYPE,
2948 ACTION_PROP_ENABLED,
2949 ACTION_PROP_STATE_TYPE,
2953 static const gchar *
2954 g_settings_action_get_name (GAction *action)
2956 GSettingsAction *gsa = (GSettingsAction *) action;
2958 return gsa->key.name;
2961 static const GVariantType *
2962 g_settings_action_get_parameter_type (GAction *action)
2964 GSettingsAction *gsa = (GSettingsAction *) action;
2965 const GVariantType *type;
2967 type = g_variant_get_type (gsa->key.default_value);
2968 if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
2975 g_settings_action_get_enabled (GAction *action)
2977 GSettingsAction *gsa = (GSettingsAction *) action;
2979 return g_settings_is_writable (gsa->settings, gsa->key.name);
2982 static const GVariantType *
2983 g_settings_action_get_state_type (GAction *action)
2985 GSettingsAction *gsa = (GSettingsAction *) action;
2987 return g_variant_get_type (gsa->key.default_value);
2991 g_settings_action_get_state (GAction *action)
2993 GSettingsAction *gsa = (GSettingsAction *) action;
2996 value = g_settings_read_from_backend (gsa->settings, &gsa->key, FALSE, FALSE);
2999 value = g_settings_schema_key_get_translated_default (&gsa->key);
3002 value = g_variant_ref (gsa->key.default_value);
3008 g_settings_action_get_state_hint (GAction *action)
3010 GSettingsAction *gsa = (GSettingsAction *) action;
3012 /* no point in reimplementing this... */
3013 return g_settings_schema_key_get_range (&gsa->key);
3017 g_settings_action_change_state (GAction *action,
3020 GSettingsAction *gsa = (GSettingsAction *) action;
3022 if (g_settings_schema_key_type_check (&gsa->key, value) && g_settings_schema_key_range_check (&gsa->key, value))
3023 g_settings_write_to_backend (gsa->settings, &gsa->key, value);
3027 g_settings_action_activate (GAction *action,
3028 GVariant *parameter)
3030 GSettingsAction *gsa = (GSettingsAction *) action;
3032 if (g_variant_is_of_type (gsa->key.default_value, G_VARIANT_TYPE_BOOLEAN))
3036 if (parameter != NULL)
3039 old = g_settings_action_get_state (action);
3040 parameter = g_variant_new_boolean (!g_variant_get_boolean (old));
3041 g_variant_unref (old);
3044 g_action_change_state (action, parameter);
3048 g_settings_action_get_property (GObject *object, guint prop_id,
3049 GValue *value, GParamSpec *pspec)
3051 GAction *action = G_ACTION (object);
3055 case ACTION_PROP_NAME:
3056 g_value_set_string (value, g_settings_action_get_name (action));
3059 case ACTION_PROP_PARAMETER_TYPE:
3060 g_value_set_boxed (value, g_settings_action_get_parameter_type (action));
3063 case ACTION_PROP_ENABLED:
3064 g_value_set_boolean (value, g_settings_action_get_enabled (action));
3067 case ACTION_PROP_STATE_TYPE:
3068 g_value_set_boxed (value, g_settings_action_get_state_type (action));
3071 case ACTION_PROP_STATE:
3072 g_value_set_variant (value, g_settings_action_get_state (action));
3076 g_assert_not_reached ();
3081 g_settings_action_finalize (GObject *object)
3083 GSettingsAction *gsa = (GSettingsAction *) object;
3085 g_signal_handlers_disconnect_by_data (gsa->settings, gsa);
3086 g_object_unref (gsa->settings);
3088 G_OBJECT_CLASS (g_settings_action_parent_class)
3089 ->finalize (object);
3093 g_settings_action_init (GSettingsAction *gsa)
3098 g_settings_action_iface_init (GActionInterface *iface)
3100 iface->get_name = g_settings_action_get_name;
3101 iface->get_parameter_type = g_settings_action_get_parameter_type;
3102 iface->get_enabled = g_settings_action_get_enabled;
3103 iface->get_state_type = g_settings_action_get_state_type;
3104 iface->get_state = g_settings_action_get_state;
3105 iface->get_state_hint = g_settings_action_get_state_hint;
3106 iface->change_state = g_settings_action_change_state;
3107 iface->activate = g_settings_action_activate;
3111 g_settings_action_class_init (GSettingsActionClass *class)
3113 class->get_property = g_settings_action_get_property;
3114 class->finalize = g_settings_action_finalize;
3116 g_object_class_override_property (class, ACTION_PROP_NAME, "name");
3117 g_object_class_override_property (class, ACTION_PROP_PARAMETER_TYPE, "parameter-type");
3118 g_object_class_override_property (class, ACTION_PROP_ENABLED, "enabled");
3119 g_object_class_override_property (class, ACTION_PROP_STATE_TYPE, "state-type");
3120 g_object_class_override_property (class, ACTION_PROP_STATE, "state");
3124 g_settings_action_changed (GSettings *settings,
3128 g_object_notify (user_data, "state");
3132 g_settings_action_enabled_changed (GSettings *settings,
3136 g_object_notify (user_data, "enabled");
3140 * g_settings_create_action:
3141 * @settings: a #GSettings
3142 * @key: the name of a key in @settings
3144 * Creates a #GAction corresponding to a given #GSettings key.
3146 * The action has the same name as the key.
3148 * The value of the key becomes the state of the action and the action
3149 * is enabled when the key is writable. Changing the state of the
3150 * action results in the key being written to. Changes to the value or
3151 * writability of the key cause appropriate change notifications to be
3152 * emitted for the action.
3154 * For boolean-valued keys, action activations take no parameter and
3155 * result in the toggling of the value. For all other types,
3156 * activations take the new value for the key (which must have the
3159 * Returns: (transfer full): a new #GAction
3164 g_settings_create_action (GSettings *settings,
3167 GSettingsAction *gsa;
3168 gchar *detailed_signal;
3170 g_return_val_if_fail (G_IS_SETTINGS (settings), NULL);
3171 g_return_val_if_fail (key != NULL, NULL);
3173 gsa = g_object_new (g_settings_action_get_type (), NULL);
3174 gsa->settings = g_object_ref (settings);
3175 g_settings_schema_key_init (&gsa->key, settings->priv->schema, key);
3177 detailed_signal = g_strdup_printf ("changed::%s", key);
3178 g_signal_connect (settings, detailed_signal, G_CALLBACK (g_settings_action_changed), gsa);
3179 g_free (detailed_signal);
3180 detailed_signal = g_strdup_printf ("writable-changed::%s", key);
3181 g_signal_connect (settings, detailed_signal, G_CALLBACK (g_settings_action_enabled_changed), gsa);
3182 g_free (detailed_signal);
3184 return G_ACTION (gsa);
3189 /* vim:set foldmethod=marker: */