Trait gtk::prelude::IsClassFor

source · [−]
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>> { ... }
}
Expand description

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

Required Associated Types

Corresponding Rust instance type for this class.

Provided Methods

Get the type id for this class.

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

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

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

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

Gets the class struct corresponding to type_.

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

Implementations on Foreign Types

Implementors