[]Struct gio::SettingsBackend

pub struct SettingsBackend(_, _);

The SettingsBackend interface defines a generic interface for non-strictly-typed data that is stored in a hierarchy. To implement an alternative storage backend for Settings, you need to implement the SettingsBackend interface and then make it implement the extension point G_SETTINGS_BACKEND_EXTENSION_POINT_NAME.

The interface defines methods for reading and writing values, a method for determining if writing of certain values will fail (lockdown) and a change notification mechanism.

The semantics of the interface are very precisely defined and implementations must carefully adhere to the expectations of callers that are documented on each of the interface methods.

Some of the SettingsBackend functions accept or return a glib::Tree. These trees always have strings as keys and glib::Variant as values. g_settings_backend_create_tree is a convenience function to create suitable trees.

The SettingsBackend API is exported to allow third-party implementations, but does not carry the same stability guarantees as the public GIO API. For this reason, you have to define the C preprocessor symbol G_SETTINGS_ENABLE_BACKEND before including gio/gsettingsbackend.h.

Implements

SettingsBackendExt, glib::object::ObjectExt

Implementations

impl SettingsBackend[src]

pub fn get_default() -> Option<SettingsBackend>[src]

Returns the default SettingsBackend. It is possible to override the default by setting the GSETTINGS_BACKEND environment variable to the name of a settings backend.

The user gets a reference to the backend.

Returns

the default SettingsBackend

Trait Implementations

impl Clone for SettingsBackend

impl Debug for SettingsBackend

impl Display for SettingsBackend[src]

impl Eq for SettingsBackend

impl Hash for SettingsBackend

impl Ord for SettingsBackend

impl<T: ObjectType> PartialEq<T> for SettingsBackend

impl<T: ObjectType> PartialOrd<T> for SettingsBackend

impl StaticType for SettingsBackend

Auto Trait Implementations

impl RefUnwindSafe for SettingsBackend

impl !Send for SettingsBackend

impl !Sync for SettingsBackend

impl Unpin for SettingsBackend

impl UnwindSafe for SettingsBackend

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<Super, Sub> CanDowncast<Sub> for Super where
    Sub: IsA<Super>,
    Super: IsA<Super>, 

impl<T> Cast for T where
    T: ObjectType, 

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> ObjectExt for T where
    T: ObjectType, 

impl<'a, T> ToGlibContainerFromSlice<'a, *const GList> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 

type Storage = (Option<List>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)

impl<'a, T> ToGlibContainerFromSlice<'a, *const GPtrArray> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 

type Storage = (Option<PtrArray>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)

impl<'a, T> ToGlibContainerFromSlice<'a, *mut GArray> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 

type Storage = (Option<Array>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)

impl<'a, T> ToGlibContainerFromSlice<'a, *mut GList> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 

type Storage = (Option<List>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)

impl<'a, T> ToGlibContainerFromSlice<'a, *mut GPtrArray> for T where
    T: GlibPtrDefault + ToGlibPtr<'a, <T as GlibPtrDefault>::GlibType>, 

type Storage = (Option<PtrArray>, Vec<Stash<'a, <T as GlibPtrDefault>::GlibType, T>>)

impl<T> ToOwned for T where
    T: Clone
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type Owned = T

The resulting type after obtaining ownership.

impl<T> ToString for T where
    T: Display + ?Sized
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impl<T> ToValue for T where
    T: SetValue + ?Sized

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.