Enum State 

pub enum State {
    None,
    Some(Box<dyn Any>),
}

Available on crate feature advanced only.

The internal State of a widget.

Variants

None

No meaningful internal state.

Some(Box<dyn Any>)

Some meaningful internal state.

Implementations

impl State

pub fn new<T>(state: T) -> State

where T: 'static,

Creates a new State.

pub fn downcast_ref<T>(&self) -> &T

where T: 'static,

Downcasts the State to T and returns a reference to it.

Panics

This method will panic if the downcast fails or the State is State::None.

pub fn downcast_mut<T>(&mut self) -> &mut T

where T: 'static,

Downcasts the State to T and returns a mutable reference to it.

Panics

This method will panic if the downcast fails or the State is State::None.

Trait Implementations

impl Debug for State

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.