[−][src]Trait gstreamer_video::prelude::IsClassFor

pub unsafe trait IsClassFor: 'static {
    type Instance: ObjectType;
    fn get_type(&self) -> Type { ... }
    fn upcast_ref<U>(&self) -> &U
    where
        U: IsClassFor,
        Self::Instance: IsA<<U as IsClassFor>::Instance>,
        <U as IsClassFor>::Instance: ObjectType,
    { ... }
    fn upcast_ref_mut<U>(&mut self) -> &mut U
    where
        U: IsClassFor,
        Self::Instance: IsA<<U as IsClassFor>::Instance>,
        <U as IsClassFor>::Instance: ObjectType,
    { ... }
    fn downcast_ref<U>(&self) -> Option<&U>
    where
        U: IsClassFor,
        <U as IsClassFor>::Instance: IsA<Self::Instance>,
        Self::Instance: ObjectType,
    { ... }
    fn downcast_ref_mut<U>(&mut self) -> Option<&mut U>
    where
        U: IsClassFor,
        <U as IsClassFor>::Instance: IsA<Self::Instance>,
        Self::Instance: ObjectType,
    { ... }
    fn from_type(type_: Type) -> Option<ClassRef<Self>> { ... }
}

Trait for mapping a class struct type to its corresponding instance type.

Associated Types

`type Instance: ObjectType`

Corresponding Rust instance type for this class.

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Provided methods

`fn get_type(&self) -> Type`

Get the type id for this class.

`fn upcast_ref<U>(&self) -> &U where U: IsClassFor, Self::Instance: IsA<<U as IsClassFor>::Instance>, <U as IsClassFor>::Instance: ObjectType,`

Casts this class to a reference to a parent type's class.

`fn upcast_ref_mut<U>(&mut self) -> &mut U where U: IsClassFor, Self::Instance: IsA<<U as IsClassFor>::Instance>, <U as IsClassFor>::Instance: ObjectType,`

Casts this class to a mutable reference to a parent type's class.

`fn downcast_ref<U>(&self) -> Option<&U> where U: IsClassFor, <U as IsClassFor>::Instance: IsA<Self::Instance>, Self::Instance: ObjectType,`

Casts this class to a reference to a child type's class or fails if this class is not implementing the child class.

`fn downcast_ref_mut<U>(&mut self) -> Option<&mut U> where U: IsClassFor, <U as IsClassFor>::Instance: IsA<Self::Instance>, Self::Instance: ObjectType,`

Casts this class to a mutable reference to a child type's class or fails if this class is not implementing the child class.

`fn from_type(type_: Type) -> Option<ClassRef<Self>>`

Gets the class struct corresponding to type_.

This will return None if type_ is not a subclass of Self.

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Implementations on Foreign Types

`impl IsClassFor for InitiallyUnownedClass`[src]

`type Instance = InitiallyUnowned`

`impl IsClassFor for ObjectClass`[src]

`type Instance = Object`

`impl IsClassFor for BindingClass`[src]

`type Instance = Binding`

`impl IsClassFor for PluginFeatureClass`[src]

`type Instance = PluginFeature`

`impl IsClassFor for TypeFindFactoryClass`[src]

`type Instance = TypeFindFactory`

`impl IsClassFor for DeviceProviderClass`[src]

`type Instance = DeviceProvider`

`impl IsClassFor for RegistryClass`[src]

`type Instance = Registry`

`impl IsClassFor for BinClass`[src]

`type Instance = Bin`

`impl IsClassFor for DeviceClass`[src]

`type Instance = Device`

`impl IsClassFor for PadClass`[src]

`type Instance = Pad`

`impl IsClassFor for DeviceMonitorClass`[src]

`type Instance = DeviceMonitor`

`impl IsClassFor for BufferPoolClass`[src]

`type Instance = BufferPool`

`impl IsClassFor for ElementFactoryClass`[src]

`type Instance = ElementFactory`

`impl IsClassFor for BusClass`[src]

`type Instance = Bus`

`impl IsClassFor for ClockClass`[src]

`type Instance = Clock`

`impl IsClassFor for StreamClass`[src]

`type Instance = Stream`

`impl IsClassFor for ElementClass`[src]

`type Instance = Element`

`impl IsClassFor for SystemClockClass`[src]

`type Instance = SystemClock`

`impl IsClassFor for PadTemplateClass`[src]

`type Instance = PadTemplate`

`impl IsClassFor for PipelineClass`[src]

`type Instance = Pipeline`

`impl IsClassFor for AllocatorClass`[src]

`type Instance = Allocator`

`impl IsClassFor for StreamCollectionClass`[src]

`type Instance = StreamCollection`

`impl IsClassFor for ObjectClass`[src]

`type Instance = Object`

`impl IsClassFor for GhostPadClass`[src]

`type Instance = GhostPad`

`impl IsClassFor for ProxyPadClass`[src]

`type Instance = ProxyPad`

`impl IsClassFor for PluginClass`[src]

`type Instance = Plugin`

`impl IsClassFor for DeviceProviderFactoryClass`[src]

`type Instance = DeviceProviderFactory`

`impl IsClassFor for AdapterClass`[src]

`type Instance = Adapter`

`impl IsClassFor for BaseTransformClass`[src]

`type Instance = BaseTransform`

`impl IsClassFor for BaseParseClass`[src]

`type Instance = BaseParse`

`impl IsClassFor for AggregatorClass`[src]

`type Instance = Aggregator`

`impl IsClassFor for BaseSrcClass`[src]

`type Instance = BaseSrc`

`impl IsClassFor for PushSrcClass`[src]

`type Instance = PushSrc`

`impl IsClassFor for AggregatorPadClass`[src]

`type Instance = AggregatorPad`

`impl IsClassFor for BaseSinkClass`[src]

`type Instance = BaseSink`

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Implementors

`impl IsClassFor for VideoBufferPoolClass`[src]

`type Instance = VideoBufferPool`

`impl IsClassFor for VideoDecoderClass`[src]

`type Instance = VideoDecoder`

`impl IsClassFor for VideoEncoderClass`[src]

`type Instance = VideoEncoder`

`impl IsClassFor for VideoFilterClass`[src]

`type Instance = VideoFilter`

`impl IsClassFor for VideoSinkClass`[src]

`type Instance = VideoSink`

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