gdk_pixbuf::subclass::prelude

Trait ObjectSubclassExt

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pub trait ObjectSubclassExt: ObjectSubclass {
    // Required methods
    fn obj(&self) -> BorrowedObject<'_, Self::Type>;
    fn from_obj(obj: &Self::Type) -> &Self;
    fn ref_counted(&self) -> ObjectImplRef<Self>;
    fn instance_data<U>(&self, type_: Type) -> Option<&U>
       where U: Any + Send + Sync + 'static;
}
Expand description

Extension methods for all ObjectSubclass impls.

Required Methods§

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fn obj(&self) -> BorrowedObject<'_, Self::Type>

Returns the corresponding object instance.

Shorter alias for instance().

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fn from_obj(obj: &Self::Type) -> &Self

Returns the implementation from an instance.

Shorter alias for from_instance().

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fn ref_counted(&self) -> ObjectImplRef<Self>

Returns a new reference-counted wrapper around self.

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fn instance_data<U>(&self, type_: Type) -> Option<&U>
where U: Any + Send + Sync + 'static,

Returns a pointer to the instance implementation specific data.

This is used for the subclassing infrastructure to store additional instance data.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§