gio/gsettings.h

   1 /*
   2  * Copyright © 2009, 2010 Codethink Limited
   3  *
   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.
   8  *
   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.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 #if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
  23 #error "Only <gio/gio.h> can be included directly."
  24 #endif
  25
  26 #ifndef __G_SETTINGS_H__
  27 #define __G_SETTINGS_H__
  28
  29 #include <glib-object.h>
  30
  31 G_BEGIN_DECLS
  32
  33 #define G_TYPE_SETTINGS                                     (g_settings_get_type ())
  34 #define G_SETTINGS(inst)                                    (G_TYPE_CHECK_INSTANCE_CAST ((inst),                     \
  35                                                              G_TYPE_SETTINGS, GSettings))
  36 #define G_SETTINGS_CLASS(class)                             (G_TYPE_CHECK_CLASS_CAST ((class),                       \
  37                                                              G_TYPE_SETTINGS, GSettingsClass))
  38 #define G_IS_SETTINGS(inst)                                 (G_TYPE_CHECK_INSTANCE_TYPE ((inst), G_TYPE_SETTINGS))
  39 #define G_IS_SETTINGS_CLASS(class)                          (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_SETTINGS))
  40 #define G_SETTINGS_GET_CLASS(inst)                          (G_TYPE_INSTANCE_GET_CLASS ((inst),                      \
  41                                                              G_TYPE_SETTINGS, GSettingsClass))
  42
  43 typedef struct _GSettingsPrivate                            GSettingsPrivate;
  44 typedef struct _GSettingsClass                              GSettingsClass;
  45 typedef struct _GSettings                                   GSettings;
  46
  47 struct _GSettingsClass
  48 {
  49   GObjectClass parent_class;
  50
  51   /* Signals */
  52   void        (*writable_changed)      (GSettings    *settings,
  53                                         const gchar  *key);
  54   void        (*changed)               (GSettings    *settings,
  55                                         const gchar  *key);
  56   gboolean    (*writable_change_event) (GSettings    *settings,
  57                                         GQuark        key);
  58   gboolean    (*change_event)          (GSettings    *settings,
  59                                         const GQuark *keys,
  60                                         gint          n_keys);
  61
  62   gpointer padding[20];
  63 };
  64
  65 struct _GSettings
  66 {
  67   GObject parent_instance;
  68   GSettingsPrivate *priv;
  69 };
  70
  71
  72 GType                   g_settings_get_type                             (void);
  73
  74 GSettings *             g_settings_new                                  (const gchar        *schema);
  75 GSettings *             g_settings_new_with_path                        (const gchar        *schema,
  76                                                                          const gchar        *path);
  77 gboolean                g_settings_supports_context                     (const gchar        *context);
  78 GSettings *             g_settings_new_with_context                     (const gchar        *schema,
  79                                                                          const gchar        *context);
  80 GSettings *             g_settings_new_with_context_and_path            (const gchar        *schema,
  81                                                                          const gchar        *context,
  82                                                                          const gchar        *path);
  83
  84 gboolean                g_settings_set_value                            (GSettings          *settings,
  85                                                                          const gchar        *key,
  86                                                                          GVariant           *value);
  87 GVariant *              g_settings_get_value                            (GSettings          *settings,
  88                                                                          const gchar        *key);
  89
  90 gboolean                g_settings_set                                  (GSettings          *settings,
  91                                                                          const gchar        *key,
  92                                                                          const gchar        *format,
  93                                                                          ...);
  94 void                    g_settings_get                                  (GSettings          *settings,
  95                                                                          const gchar        *key,
  96                                                                          const gchar        *format,
  97                                                                          ...);
  98
  99 gint                    g_settings_get_int                              (GSettings          *settings,
 100                                                                          const gchar        *key);
 101 gboolean                g_settings_set_int                              (GSettings          *settings,
 102                                                                          const gchar        *key,
 103                                                                          gint                value);
 104 gchar *                 g_settings_get_string                           (GSettings          *settings,
 105                                                                          const gchar        *key);
 106 gboolean                g_settings_set_string                           (GSettings          *settings,
 107                                                                          const gchar        *key,
 108                                                                          const gchar        *value);
 109 gboolean                g_settings_get_boolean                          (GSettings          *settings,
 110                                                                          const gchar        *key);
 111 gboolean                g_settings_set_boolean                          (GSettings          *settings,
 112                                                                          const gchar        *key,
 113                                                                          gboolean            value);
 114 gdouble                 g_settings_get_double                           (GSettings          *settings,
 115                                                                          const gchar        *key);
 116 gboolean                g_settings_set_double                           (GSettings          *settings,
 117                                                                          const gchar        *key,
 118                                                                          gdouble             value);
 119 gchar **                g_settings_get_strv                             (GSettings          *settings,
 120                                                                          const gchar        *key);
 121 gboolean                g_settings_set_strv                             (GSettings          *settings,
 122                                                                          const gchar        *key,
 123                                                                          const gchar *const *value);
 124
 125 GSettings *             g_settings_get_child                            (GSettings          *settings,
 126                                                                          const gchar        *name);
 127
 128 gboolean                g_settings_is_writable                          (GSettings          *settings,
 129                                                                          const gchar        *name);
 130
 131 void                    g_settings_delay                                (GSettings          *settings);
 132 void                    g_settings_apply                                (GSettings          *settings);
 133 void                    g_settings_revert                               (GSettings          *settings);
 134 gboolean                g_settings_get_has_unapplied                    (GSettings          *settings);
 135
 136 /**
 137  * GSettingsBindSetMapping:
 138  * @value: a #GValue containing the property value to map
 139  * @expected_type: the #GVariantType to create
 140  * @user_data: user data that was specified when the binding was created
 141  * @returns: a new #GVariant holding the data from @value,
 142  *     or %NULL in case of an error
 143  *
 144  * The type for the function that is used to convert an object property
 145  * value to a #GVariant for storing it in #GSettings.
 146  */
 147 typedef GVariant *    (*GSettingsBindSetMapping)                        (const GValue       *value,
 148                                                                          const GVariantType *expected_type,
 149                                                                          gpointer            user_data);
 150
 151 /**
 152  * GSettingsBindGetMapping:
 153  * @value: return location for the property value
 154  * @variant: the #GVariant
 155  * @user_data: user data that was specified when the binding was created
 156  * @returns: %TRUE if the conversion succeeded, %FALSE in case of an error
 157  *
 158  * The type for the function that is used to convert from #GSettings to
 159  * an object property. The @value is already initialized to hold values
 160  * of the appropriate type.
 161  */
 162 typedef gboolean      (*GSettingsBindGetMapping)                        (GValue             *value,
 163                                                                          GVariant           *variant,
 164                                                                          gpointer            user_data);
 165
 166 /**
 167  * GSettingsBindFlags:
 168  * @G_SETTINGS_BIND_DEFAULT: Equivalent to <literal>G_SETTINGS_BIND_GET|G_SETTINGS_BIND_SET</literal>
 169  * @G_SETTINGS_BIND_GET: Update the #GObject property when the setting changes.
 170  *     It is an error to use this flag if the property is not writable.
 171  * @G_SETTINGS_BIND_SET: Update the setting when the #GObject property changes.
 172  *     It is an error to use this flag if the property is not readable.
 173  * @G_SETTINGS_BIND_NO_SENSITIVITY: Do not try to bind a "sensitivity" property to the writability of the setting
 174  * @G_SETTINGS_BIND_GET_NO_CHANGES: When set in addition to #G_SETTINGS_BIND_GET, set the #GObject property
 175  *     value initially from the setting, but do not listen for changes of the setting
 176  *
 177  * Flags used when creating a binding. These flags determine in which
 178  * direction the binding works. The default is to synchronize in both
 179  * directions.
 180  */
 181 typedef enum
 182 {
 183   G_SETTINGS_BIND_DEFAULT,
 184   G_SETTINGS_BIND_GET            = (1<<0),
 185   G_SETTINGS_BIND_SET            = (1<<1),
 186   G_SETTINGS_BIND_NO_SENSITIVITY = (1<<2),
 187   G_SETTINGS_BIND_GET_NO_CHANGES = (1<<3)
 188 } GSettingsBindFlags;
 189
 190 void                    g_settings_bind                                 (GSettings               *settings,
 191                                                                          const gchar             *key,
 192                                                                          gpointer                 object,
 193                                                                          const gchar             *property,
 194                                                                          GSettingsBindFlags       flags);
 195 void                    g_settings_bind_with_mapping                    (GSettings               *settings,
 196                                                                          const gchar             *key,
 197                                                                          gpointer                 object,
 198                                                                          const gchar             *property,
 199                                                                          GSettingsBindFlags       flags,
 200                                                                          GSettingsBindGetMapping  get_mapping,
 201                                                                          GSettingsBindSetMapping  set_mapping,
 202                                                                          gpointer                 user_data,
 203                                                                          GDestroyNotify           destroy);
 204 void                    g_settings_bind_writable                        (GSettings               *settings,
 205                                                                          const gchar             *key,
 206                                                                          gpointer                 object,
 207                                                                          const gchar             *property,
 208                                                                          gboolean                 inverted);
 209 void                    g_settings_unbind                               (gpointer                 object,
 210                                                                          const gchar             *property);
 211
 212 G_END_DECLS
 213
 214 #endif  /* __G_SETTINGS_H__ */