#[repr(transparent)]pub struct MetaContainer { /* private fields */ }Expand description
A glib::Object that implements MetaContainer can have metadata set on
it, that is data that is unimportant to its function within GES, but
may hold some useful information. In particular,
MetaContainerExt::set_meta() can be used to store any glib::Value under
any generic field (specified by a string key). The same method can also
be used to remove the field by passing None. A number of convenience
methods are also provided to make it easier to set common value types.
The metadata can then be read with MetaContainerExt::meta() and
similar convenience methods.
Registered Fields
By default, any glib::Value can be set for a metadata field. However, you
can register some fields as static, that is they only allow values of a
specific type to be set under them, using
MetaContainerExt::register_meta() or
MetaContainerExt::register_static_meta(). The set MetaFlag will
determine whether the value can be changed, but even if it can be
changed, it must be changed to a value of the same type.
Internally, some GES objects will be initialized with static metadata
fields. These will correspond to some standard keys, such as
GES_META_VOLUME.
Signals
notify-meta
This is emitted for a meta container whenever the metadata under one
of its fields changes, is set for the first time, or is removed. In
the latter case, value will be None.
Detailed
Implements
Implementations§
source§impl MetaContainer
impl MetaContainer
pub const NONE: Option<&'static MetaContainer> = None
Trait Implementations§
source§impl Clone for MetaContainer
impl Clone for MetaContainer
source§impl Debug for MetaContainer
impl Debug for MetaContainer
source§impl HasParamSpec for MetaContainer
impl HasParamSpec for MetaContainer
type ParamSpec = ParamSpecObject
§type SetValue = MetaContainer
type SetValue = MetaContainer
Preferred value to be used as setter for the associated ParamSpec.
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, MetaContainer>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for MetaContainer
impl Hash for MetaContainer
source§impl Ord for MetaContainer
impl Ord for MetaContainer
source§impl<OT: ObjectType> PartialEq<OT> for MetaContainer
impl<OT: ObjectType> PartialEq<OT> for MetaContainer
source§impl<OT: ObjectType> PartialOrd<OT> for MetaContainer
impl<OT: ObjectType> PartialOrd<OT> for MetaContainer
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for
self and other) and is used by the <=
operator. Read moresource§impl StaticType for MetaContainer
impl StaticType for MetaContainer
source§fn static_type() -> Type
fn static_type() -> Type
Returns the type identifier of
Self.impl Eq for MetaContainer
impl IsA<MetaContainer> for Asset
impl IsA<MetaContainer> for AudioSource
impl IsA<MetaContainer> for AudioTestSource
impl IsA<MetaContainer> for AudioTrack
impl IsA<MetaContainer> for AudioTransition
impl IsA<MetaContainer> for AudioUriSource
impl IsA<MetaContainer> for BaseEffect
impl IsA<MetaContainer> for BaseEffectClip
impl IsA<MetaContainer> for BaseTransitionClip
impl IsA<MetaContainer> for Clip
impl IsA<MetaContainer> for ClipAsset
impl IsA<MetaContainer> for Container
impl IsA<MetaContainer> for Effect
impl IsA<MetaContainer> for EffectAsset
impl IsA<MetaContainer> for EffectClip
impl IsA<MetaContainer> for Group
impl IsA<MetaContainer> for ImageSource
impl IsA<MetaContainer> for Layer
impl IsA<MetaContainer> for Marker
Available on crate feature
v1_18 only.impl IsA<MetaContainer> for MultiFileSource
impl IsA<MetaContainer> for Operation
impl IsA<MetaContainer> for OperationClip
impl IsA<MetaContainer> for OverlayClip
impl IsA<MetaContainer> for Project
impl IsA<MetaContainer> for Source
impl IsA<MetaContainer> for SourceClip
impl IsA<MetaContainer> for SourceClipAsset
Available on crate feature
v1_18 only.impl IsA<MetaContainer> for TestClip
impl IsA<MetaContainer> for TextOverlay
impl IsA<MetaContainer> for TextOverlayClip
impl IsA<MetaContainer> for Timeline
impl IsA<MetaContainer> for TimelineElement
impl IsA<MetaContainer> for TitleClip
impl IsA<MetaContainer> for TitleSource
impl IsA<MetaContainer> for Track
impl IsA<MetaContainer> for TrackElement
impl IsA<MetaContainer> for TrackElementAsset
impl IsA<MetaContainer> for Transition
impl IsA<MetaContainer> for TransitionClip
impl IsA<MetaContainer> for UriClip
impl IsA<MetaContainer> for UriClipAsset
impl IsA<MetaContainer> for UriSourceAsset
impl IsA<MetaContainer> for VideoSource
impl IsA<MetaContainer> for VideoTestSource
impl IsA<MetaContainer> for VideoTrack
impl IsA<MetaContainer> for VideoTransition
impl IsA<MetaContainer> for VideoUriSource
Auto Trait Implementations§
impl RefUnwindSafe for MetaContainer
impl !Send for MetaContainer
impl !Sync for MetaContainer
impl Unpin for MetaContainer
impl UnwindSafe for MetaContainer
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