[−][src]Trait glib::object::IsClassFor

pub unsafe trait IsClassFor: Sized + 'static {
    type Instance: ObjectType;
    fn get_type(&self) -> Type { ... }

    fn upcast_ref<U: IsClassFor>(&self) -> &U
    where
        Self::Instance: IsA<U::Instance>,
        U::Instance: ObjectType,
    { ... }

    fn upcast_ref_mut<U: IsClassFor>(&mut self) -> &mut U
    where
        Self::Instance: IsA<U::Instance>,
        U::Instance: ObjectType,
    { ... }

    fn downcast_ref<U: IsClassFor>(&self) -> Option<&U>
    where
        U::Instance: IsA<Self::Instance>,
        Self::Instance: ObjectType,
    { ... }

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

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

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

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

fn downcast_ref<U: IsClassFor>(&self) -> Option<&U> where
    U::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: IsClassFor>(&mut self) -> Option<&mut U> where
    U::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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Implementors

impl IsClassFor for InitiallyUnownedClass[src]

type Instance = InitiallyUnowned

impl IsClassFor for ObjectClass[src]

type Instance = Object

impl IsClassFor for BindingClass[src]

type Instance = Binding

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