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docs: Move the GSettings SECTIONs
Move them to the struct docs. Signed-off-by: Philip Withnall <philip@tecnocode.co.uk> Helps: #3037
This commit is contained in:
Philip Withnall
parent
8c3e0aa406
commit
c16c639729
193
gio/gsettings.c
193
gio/gsettings.c
@ -37,116 +37,115 @@
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#include "strinfo.c"
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/**
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* SECTION:gsettings
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* @short_description: High-level API for application settings
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* @include: gio/gio.h
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* GSettings:
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*
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* The #GSettings class provides a convenient API for storing and retrieving
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* The `GSettings` class provides a convenient API for storing and retrieving
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* application settings.
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*
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* Reads and writes can be considered to be non-blocking. Reading
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* settings with #GSettings is typically extremely fast: on
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* settings with `GSettings` is typically extremely fast: on
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* approximately the same order of magnitude (but slower than) a
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* #GHashTable lookup. Writing settings is also extremely fast in terms
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* of time to return to your application, but can be extremely expensive
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* [struct@GLib.HashTable] lookup. Writing settings is also extremely fast in
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* terms of time to return to your application, but can be extremely expensive
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* for other threads and other processes. Many settings backends
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* (including dconf) have lazy initialisation which means in the common
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* case of the user using their computer without modifying any settings
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* a lot of work can be avoided. For dconf, the D-Bus service doesn't
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* a lot of work can be avoided. For dconf, the D-Bus service doesn’t
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* even need to be started in this case. For this reason, you should
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* only ever modify #GSettings keys in response to explicit user action.
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* only ever modify `GSettings` keys in response to explicit user action.
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* Particular care should be paid to ensure that modifications are not
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* made during startup -- for example, when setting the initial value
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* of preferences widgets. The built-in g_settings_bind() functionality
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* is careful not to write settings in response to notify signals as a
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* result of modifications that it makes to widgets.
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* made during startup — for example, when setting the initial value
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* of preferences widgets. The built-in [method@Gio.Settings.bind]
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* functionality is careful not to write settings in response to notify signals
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* as a result of modifications that it makes to widgets.
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*
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* When creating a GSettings instance, you have to specify a schema
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* When creating a `GSettings` instance, you have to specify a schema
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* that describes the keys in your settings and their types and default
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* values, as well as some other information.
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*
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* Normally, a schema has a fixed path that determines where the settings
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* are stored in the conceptual global tree of settings. However, schemas
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* can also be '[relocatable][gsettings-relocatable]', i.e. not equipped with
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* can also be ‘[relocatable](#relocatable-schemas)’, i.e. not equipped with
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* a fixed path. This is
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* useful e.g. when the schema describes an 'account', and you want to be
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* useful e.g. when the schema describes an ‘account’, and you want to be
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* able to store a arbitrary number of accounts.
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*
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* Paths must start with and end with a forward slash character ('/')
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* Paths must start with and end with a forward slash character (`/`)
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* and must not contain two sequential slash characters. Paths should
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* be chosen based on a domain name associated with the program or
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* library to which the settings belong. Examples of paths are
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* "/org/gtk/settings/file-chooser/" and "/ca/desrt/dconf-editor/".
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* Paths should not start with "/apps/", "/desktop/" or "/system/" as
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* `/org/gtk/settings/file-chooser/` and `/ca/desrt/dconf-editor/`.
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* Paths should not start with `/apps/`, `/desktop/` or `/system/` as
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* they often did in GConf.
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*
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* Unlike other configuration systems (like GConf), GSettings does not
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* restrict keys to basic types like strings and numbers. GSettings stores
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* values as #GVariant, and allows any #GVariantType for keys. Key names
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* are restricted to lowercase characters, numbers and '-'. Furthermore,
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* the names must begin with a lowercase character, must not end
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* with a '-', and must not contain consecutive dashes.
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* values as [struct@GLib.Variant], and allows any [type@GLib.VariantType] for
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* keys. Key names are restricted to lowercase characters, numbers and `-`.
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* Furthermore, the names must begin with a lowercase character, must not end
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* with a `-`, and must not contain consecutive dashes.
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*
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* Similar to GConf, the default values in GSettings schemas can be
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* localized, but the localized values are stored in gettext catalogs
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* and looked up with the domain that is specified in the
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* `gettext-domain` attribute of the <schemalist> or <schema>
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* `gettext-domain` attribute of the `<schemalist>` or `<schema>`
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* elements and the category that is specified in the `l10n` attribute of
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* the <default> element. The string which is translated includes all text in
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* the <default> element, including any surrounding quotation marks.
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* the `<default>` element. The string which is translated includes all text in
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* the `<default>` element, including any surrounding quotation marks.
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*
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* The `l10n` attribute must be set to `messages` or `time`, and sets the
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* [locale category for
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* translation](https://www.gnu.org/software/gettext/manual/html_node/Aspects.html#index-locale-categories-1).
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* The `messages` category should be used by default; use `time` for
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* translatable date or time formats. A translation comment can be added as an
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* XML comment immediately above the <default> element — it is recommended to
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* XML comment immediately above the `<default>` element — it is recommended to
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* add these comments to aid translators understand the meaning and
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* implications of the default value. An optional translation `context`
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* attribute can be set on the <default> element to disambiguate multiple
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* attribute can be set on the `<default>` element to disambiguate multiple
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* defaults which use the same string.
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*
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* For example:
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* |[
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* ```xml
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* <!-- Translators: A list of words which are not allowed to be typed, in
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* GVariant serialization syntax.
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* See: https://developer.gnome.org/glib/stable/gvariant-text.html -->
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* <default l10n='messages' context='Banned words'>['bad', 'words']</default>
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* ]|
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* ```
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*
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* Translations of default values must remain syntactically valid serialized
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* #GVariants (e.g. retaining any surrounding quotation marks) or runtime
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* errors will occur.
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* [struct@GLib.Variant]s (e.g. retaining any surrounding quotation marks) or
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* runtime errors will occur.
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*
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* GSettings uses schemas in a compact binary form that is created
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* by the [glib-compile-schemas][glib-compile-schemas]
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* by the [`glib-compile-schemas`](glib-compile-schemas.html)
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* utility. The input is a schema description in an XML format.
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*
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* A DTD for the gschema XML format can be found here:
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* [gschema.dtd](https://gitlab.gnome.org/GNOME/glib/-/blob/HEAD/gio/gschema.dtd)
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*
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* The [glib-compile-schemas][glib-compile-schemas] tool expects schema
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* The [`glib-compile-schemas`](glib-compile-schemas.html) tool expects schema
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* files to have the extension `.gschema.xml`.
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*
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* At runtime, schemas are identified by their id (as specified in the
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* id attribute of the <schema> element). The convention for schema
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* ids is to use a dotted name, similar in style to a D-Bus bus name,
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* e.g. "org.gnome.SessionManager". In particular, if the settings are
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* At runtime, schemas are identified by their ID (as specified in the
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* `id` attribute of the `<schema>` element). The convention for schema
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* IDs is to use a dotted name, similar in style to a D-Bus bus name,
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* e.g. `org.gnome.SessionManager`. In particular, if the settings are
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* for a specific service that owns a D-Bus bus name, the D-Bus bus name
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* and schema id should match. For schemas which deal with settings not
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* associated with one named application, the id should not use
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* StudlyCaps, e.g. "org.gnome.font-rendering".
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* and schema ID should match. For schemas which deal with settings not
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* associated with one named application, the ID should not use
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* StudlyCaps, e.g. `org.gnome.font-rendering`.
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*
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* In addition to #GVariant types, keys can have types that have
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* enumerated types. These can be described by a <choice>,
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* <enum> or <flags> element, as seen in the
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* [example][schema-enumerated]. The underlying type of such a key
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* is string, but you can use g_settings_get_enum(), g_settings_set_enum(),
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* g_settings_get_flags(), g_settings_set_flags() access the numeric values
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* corresponding to the string value of enum and flags keys.
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* In addition to [struct@GLib.Variant] types, keys can have types that have
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* enumerated types. These can be described by a `<choice>`,
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* `<enum>` or `<flags>` element, as seen in the
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* second example below. The underlying type of such a key
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* is string, but you can use [method@Gio.Settings.get_enum],
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* [method@Gio.Settings.set_enum], [method@Gio.Settings.get_flags],
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* [method@Gio.Settings.set_flags] access the numeric values corresponding to
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* the string value of enum and flags keys.
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*
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* An example for default value:
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* |[
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* ```xml
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* <schemalist>
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* <schema id="org.gtk.Test" path="/org/gtk/Test/" gettext-domain="test">
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*
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@ -169,10 +168,10 @@
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*
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* </schema>
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* </schemalist>
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* ]|
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* ```
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*
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* An example for ranges, choices and enumerated types:
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* |[
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* ```xml
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* <schemalist>
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*
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* <enum id="org.gtk.Test.myenum">
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@ -215,7 +214,7 @@
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* </key>
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* </schema>
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* </schemalist>
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* ]|
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* ```
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*
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* ## Vendor overrides
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*
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@ -223,41 +222,42 @@
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* an application. Sometimes, it is necessary for a vendor or distributor
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* to adjust these defaults. Since patching the XML source for the schema
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* is inconvenient and error-prone,
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* [glib-compile-schemas][glib-compile-schemas] reads so-called vendor
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* override' files. These are keyfiles in the same directory as the XML
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* schema sources which can override default values. The schema id serves
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* [`glib-compile-schemas`](glib-compile-schemas.html) reads so-called ‘vendor
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* override’ files. These are keyfiles in the same directory as the XML
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* schema sources which can override default values. The schema ID serves
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* as the group name in the key file, and the values are expected in
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* serialized GVariant form, as in the following example:
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* |[
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* [org.gtk.Example]
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* key1='string'
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* key2=1.5
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* ]|
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* serialized [struct@GLib.Variant] form, as in the following example:
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* ```
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* [org.gtk.Example]
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* key1='string'
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* key2=1.5
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* ```
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*
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* glib-compile-schemas expects schema files to have the extension
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* `glib-compile-schemas` expects schema files to have the extension
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* `.gschema.override`.
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*
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* ## Binding
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*
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* A very convenient feature of GSettings lets you bind #GObject properties
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* directly to settings, using g_settings_bind(). Once a GObject property
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* has been bound to a setting, changes on either side are automatically
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* propagated to the other side. GSettings handles details like mapping
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* between GObject and GVariant types, and preventing infinite cycles.
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* A very convenient feature of GSettings lets you bind [class@GObject.Object]
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* properties directly to settings, using [method@Gio.Settings.bind]. Once a
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* [class@GObject.Object] property has been bound to a setting, changes on
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* either side are automatically propagated to the other side. GSettings handles
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* details like mapping between [class@GObject.Object] and [struct@GLib.Variant]
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* types, and preventing infinite cycles.
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*
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* This makes it very easy to hook up a preferences dialog to the
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* underlying settings. To make this even more convenient, GSettings
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* looks for a boolean property with the name "sensitivity" and
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* looks for a boolean property with the name `sensitivity` and
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* automatically binds it to the writability of the bound setting.
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* If this 'magic' gets in the way, it can be suppressed with the
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* %G_SETTINGS_BIND_NO_SENSITIVITY flag.
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* If this ‘magic’ gets in the way, it can be suppressed with the
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* `G_SETTINGS_BIND_NO_SENSITIVITY` flag.
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*
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* ## Relocatable schemas # {#gsettings-relocatable}
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* ## Relocatable schemas
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*
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* A relocatable schema is one with no `path` attribute specified on its
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* <schema> element. By using g_settings_new_with_path(), a #GSettings object
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* can be instantiated for a relocatable schema, assigning a path to the
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* instance. Paths passed to g_settings_new_with_path() will typically be
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* `<schema>` element. By using [ctor@Gio.Settings.new_with_path], a `GSettings`
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* object can be instantiated for a relocatable schema, assigning a path to the
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* instance. Paths passed to [ctor@Gio.Settings.new_with_path] will typically be
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* constructed dynamically from a constant prefix plus some form of instance
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* identifier; but they must still be valid GSettings paths. Paths could also
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* be constant and used with a globally installed schema originating from a
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@ -268,59 +268,59 @@
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* `org.foo.MyApp.Window`, it could be instantiated for paths
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* `/org/foo/MyApp/main/`, `/org/foo/MyApp/document-1/`,
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* `/org/foo/MyApp/document-2/`, etc. If any of the paths are well-known
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* they can be specified as <child> elements in the parent schema, e.g.:
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* |[
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* they can be specified as `<child>` elements in the parent schema, e.g.:
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* ```xml
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* <schema id="org.foo.MyApp" path="/org/foo/MyApp/">
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* <child name="main" schema="org.foo.MyApp.Window"/>
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* </schema>
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* ]|
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* ```
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*
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* ## Build system integration # {#gsettings-build-system}
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* ## Build system integration
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*
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* GSettings comes with autotools integration to simplify compiling and
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* installing schemas. To add GSettings support to an application, add the
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* following to your `configure.ac`:
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* |[
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* ```
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* GLIB_GSETTINGS
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* ]|
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* ```
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*
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* In the appropriate `Makefile.am`, use the following snippet to compile and
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* install the named schema:
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* |[
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* ```
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* gsettings_SCHEMAS = org.foo.MyApp.gschema.xml
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* EXTRA_DIST = $(gsettings_SCHEMAS)
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*
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* @GSETTINGS_RULES@
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* ]|
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* ```
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*
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* No changes are needed to the build system to mark a schema XML file for
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* translation. Assuming it sets the `gettext-domain` attribute, a schema may
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* be marked for translation by adding it to `POTFILES.in`, assuming gettext
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* 0.19 is in use (the preferred method for translation):
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* |[
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* ```
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* data/org.foo.MyApp.gschema.xml
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* ]|
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* ```
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*
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* Alternatively, if intltool 0.50.1 is in use:
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* |[
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* ```
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* [type: gettext/gsettings]data/org.foo.MyApp.gschema.xml
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* ]|
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* ```
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*
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* GSettings will use gettext to look up translations for the <summary> and
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* <description> elements, and also any <default> elements which have a `l10n`
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* attribute set. Translations must not be included in the `.gschema.xml` file
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* by the build system, for example by using intltool XML rules with a
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* GSettings will use gettext to look up translations for the `<summary>` and
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* `<description>` elements, and also any `<default>` elements which have a
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* `l10n` attribute set. Translations must not be included in the `.gschema.xml`
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* file by the build system, for example by using intltool XML rules with a
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* `.gschema.xml.in` template.
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*
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* If an enumerated type defined in a C header file is to be used in a GSettings
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* schema, it can either be defined manually using an <enum> element in the
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* schema, it can either be defined manually using an `<enum>` element in the
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* schema XML, or it can be extracted automatically from the C header. This
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* approach is preferred, as it ensures the two representations are always
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* synchronised. To do so, add the following to the relevant `Makefile.am`:
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* |[
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* ```
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* gsettings_ENUM_NAMESPACE = org.foo.MyApp
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* gsettings_ENUM_FILES = my-app-enums.h my-app-misc.h
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* ]|
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* ```
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*
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* `gsettings_ENUM_NAMESPACE` specifies the schema namespace for the enum files,
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* which are specified in `gsettings_ENUM_FILES`. This will generate a
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@ -330,13 +330,6 @@
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* `EXTRA_DIST`.
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*/
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/**
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* GSettings:
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*
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* #GSettings is an opaque data structure and can only be accessed
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* using the following functions.
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**/
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struct _GSettingsPrivate
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{
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/* where the signals go... */
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@ -52,17 +52,13 @@ G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GSettingsBackend, g_settings_backend, G_TYP
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static gboolean g_settings_has_backend;
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/**
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* SECTION:gsettingsbackend
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* @title: GSettingsBackend
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* @short_description: Interface for settings backend implementations
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* @include: gio/gsettingsbackend.h
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* @see_also: #GSettings, #GIOExtensionPoint
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* GSettingsBackend:
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*
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* The #GSettingsBackend interface defines a generic interface for
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* The `GSettingsBackend` interface defines a generic interface for
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* non-strictly-typed data that is stored in a hierarchy. To implement
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* an alternative storage backend for #GSettings, you need to implement
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* the #GSettingsBackend interface and then make it implement the
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* extension point %G_SETTINGS_BACKEND_EXTENSION_POINT_NAME.
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* an alternative storage backend for [class@Gio.Settings], you need to
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* implement the `GSettingsBackend` interface and then make it implement the
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* extension point `G_SETTINGS_BACKEND_EXTENSION_POINT_NAME`.
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*
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* The interface defines methods for reading and writing values, a
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* method for determining if writing of certain values will fail
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@ -72,15 +68,14 @@ static gboolean g_settings_has_backend;
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* implementations must carefully adhere to the expectations of
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* callers that are documented on each of the interface methods.
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*
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* Some of the #GSettingsBackend functions accept or return a #GTree.
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* These trees always have strings as keys and #GVariant as values.
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* g_settings_backend_create_tree() is a convenience function to create
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* suitable trees.
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* Some of the `GSettingsBackend` functions accept or return a
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* [struct@GLib.Tree]. These trees always have strings as keys and
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* [struct@GLib.Variant] as values.
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*
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* The #GSettingsBackend API is exported to allow third-party
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* The `GSettingsBackend` API is exported to allow third-party
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* implementations, but does not carry the same stability guarantees
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* as the public GIO API. For this reason, you have to define the
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* C preprocessor symbol %G_SETTINGS_ENABLE_BACKEND before including
|
||||
* C preprocessor symbol `G_SETTINGS_ENABLE_BACKEND` before including
|
||||
* `gio/gsettingsbackend.h`.
|
||||
**/
|
||||
|
||||
|
||||
@ -53,11 +53,6 @@ G_BEGIN_DECLS
|
||||
**/
|
||||
#define G_SETTINGS_BACKEND_EXTENSION_POINT_NAME "gsettings-backend"
|
||||
|
||||
/**
|
||||
* GSettingsBackend:
|
||||
*
|
||||
* An implementation of a settings storage repository.
|
||||
**/
|
||||
typedef struct _GSettingsBackendPrivate GSettingsBackendPrivate;
|
||||
typedef struct _GSettingsBackendClass GSettingsBackendClass;
|
||||
|
||||
|
||||
@ -38,12 +38,9 @@
|
||||
#endif
|
||||
|
||||
/**
|
||||
* SECTION:gsettingsschema
|
||||
* @short_description: Introspecting and controlling the loading
|
||||
* of GSettings schemas
|
||||
* @include: gio/gio.h
|
||||
* GSettingsSchema:
|
||||
*
|
||||
* The #GSettingsSchemaSource and #GSettingsSchema APIs provide a
|
||||
* The [struct@Gio.SettingsSchemaSource] and `GSettingsSchema` APIs provide a
|
||||
* mechanism for advanced control over the loading of schemas and a
|
||||
* mechanism for introspecting their content.
|
||||
*
|
||||
@ -53,20 +50,20 @@
|
||||
* the schema along with itself and it won't be installed into the
|
||||
* standard system directories for schemas.
|
||||
*
|
||||
* #GSettingsSchemaSource provides a mechanism for dealing with this by
|
||||
* allowing the creation of a new 'schema source' from which schemas can
|
||||
* [struct@Gio.SettingsSchemaSource] provides a mechanism for dealing with this
|
||||
* by allowing the creation of a new ‘schema source’ from which schemas can
|
||||
* be acquired. This schema source can then become part of the metadata
|
||||
* associated with the plugin and queried whenever the plugin requires
|
||||
* access to some settings.
|
||||
*
|
||||
* Consider the following example:
|
||||
*
|
||||
* |[<!-- language="C" -->
|
||||
* ```c
|
||||
* typedef struct
|
||||
* {
|
||||
* ...
|
||||
* …
|
||||
* GSettingsSchemaSource *schema_source;
|
||||
* ...
|
||||
* …
|
||||
* } Plugin;
|
||||
*
|
||||
* Plugin *
|
||||
@ -74,18 +71,18 @@
|
||||
* {
|
||||
* Plugin *plugin;
|
||||
*
|
||||
* ...
|
||||
* …
|
||||
*
|
||||
* plugin->schema_source =
|
||||
* g_settings_schema_source_new_from_directory (dir,
|
||||
* g_settings_schema_source_get_default (), FALSE, NULL);
|
||||
*
|
||||
* ...
|
||||
* …
|
||||
*
|
||||
* return plugin;
|
||||
* }
|
||||
*
|
||||
* ...
|
||||
* …
|
||||
*
|
||||
* GSettings *
|
||||
* plugin_get_settings (Plugin *plugin,
|
||||
@ -101,12 +98,12 @@
|
||||
*
|
||||
* if (schema == NULL)
|
||||
* {
|
||||
* ... disable the plugin or abort, etc ...
|
||||
* … disable the plugin or abort, etc …
|
||||
* }
|
||||
*
|
||||
* return g_settings_new_full (schema, NULL, NULL);
|
||||
* }
|
||||
* ]|
|
||||
* ```
|
||||
*
|
||||
* The code above shows how hooks should be added to the code that
|
||||
* initialises (or enables) the plugin to create the schema source and
|
||||
@ -118,19 +115,19 @@
|
||||
* ships a gschemas.compiled file as part of itself, and then simply do
|
||||
* the following:
|
||||
*
|
||||
* |[<!-- language="C" -->
|
||||
* ```c
|
||||
* {
|
||||
* GSettings *settings;
|
||||
* gint some_value;
|
||||
*
|
||||
* settings = plugin_get_settings (self, NULL);
|
||||
* some_value = g_settings_get_int (settings, "some-value");
|
||||
* ...
|
||||
* …
|
||||
* }
|
||||
* ]|
|
||||
* ```
|
||||
*
|
||||
* It's also possible that the plugin system expects the schema source
|
||||
* files (ie: .gschema.xml files) instead of a gschemas.compiled file.
|
||||
* files (ie: `.gschema.xml` files) instead of a `gschemas.compiled` file.
|
||||
* In that case, the plugin loading system must compile the schemas for
|
||||
* itself before attempting to create the settings source.
|
||||
*
|
||||
@ -144,13 +141,6 @@
|
||||
* using the following functions.
|
||||
**/
|
||||
|
||||
/**
|
||||
* GSettingsSchema:
|
||||
*
|
||||
* This is an opaque structure type. You may not access it directly.
|
||||
*
|
||||
* Since: 2.32
|
||||
**/
|
||||
struct _GSettingsSchema
|
||||
{
|
||||
GSettingsSchemaSource *source;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user