Struct Callback 

pub struct Callback<A>(pub RefCell<Option<Function<A>>>);

Wrapper for a single argument callback function.

Tuple Fields

0: RefCell<Option<Function<A>>>

Implementations

impl<A> Callback<A>

pub fn set_func(&self, f: Function<A>)

Sets the inner Function.

pub fn is_set(&self) -> bool

Indicates whether this Callback is set.

impl Callback<()>

pub fn call0(&self)

Invokes the underlying Function (if any) passing no arguments to it.

impl<A: Into<DartValue>> Callback<A>

pub fn call1<T: Into<A>>(&self, arg: T)

Invokes the underlying Function (if any) passing the single provided argument to it.

Trait Implementations

impl<A: Debug> Debug for Callback<A>

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

Formats the value using the given formatter.

impl<A> Default for Callback<A>

fn default() -> Self

Returns the “default value” for a type.