Control.Wire.Varying

Time-varying values

data Varying a

A Varying is a behaviour combined with an event that tracks when the value changes.

Instances

Monad Varying

Methods

(>>=) :: Varying a -> (a -> Varying b) -> Varying b

(>>) :: Varying a -> Varying b -> Varying b

return :: a -> Varying a

fail :: String -> Varying a

Functor Varying

Methods

fmap :: (a -> b) -> Varying a -> Varying b

(<$) :: a -> Varying b -> Varying a

Applicative Varying

Methods

pure :: a -> Varying a

(<*>) :: Varying (a -> b) -> Varying a -> Varying b

(*>) :: Varying a -> Varying b -> Varying b

(<*) :: Varying a -> Varying b -> Varying a

Foldable Varying

Methods

fold :: Monoid m => Varying m -> m

foldMap :: Monoid m => (a -> m) -> Varying a -> m

foldr :: (a -> b -> b) -> b -> Varying a -> b

foldr' :: (a -> b -> b) -> b -> Varying a -> b

foldl :: (b -> a -> b) -> b -> Varying a -> b

foldl' :: (b -> a -> b) -> b -> Varying a -> b

foldr1 :: (a -> a -> a) -> Varying a -> a

foldl1 :: (a -> a -> a) -> Varying a -> a

toList :: Varying a -> [a]

null :: Varying a -> Bool

length :: Varying a -> Int

elem :: Eq a => a -> Varying a -> Bool

maximum :: Ord a => Varying a -> a

minimum :: Ord a => Varying a -> a

sum :: Num a => Varying a -> a

product :: Num a => Varying a -> a

Bounded a => Bounded (Varying a)

Methods

minBound :: Varying a

maxBound :: Varying a

Floating a => Floating (Varying a)

Methods

pi :: Varying a

exp :: Varying a -> Varying a

log :: Varying a -> Varying a

sqrt :: Varying a -> Varying a

(**) :: Varying a -> Varying a -> Varying a

logBase :: Varying a -> Varying a -> Varying a

sin :: Varying a -> Varying a

cos :: Varying a -> Varying a

tan :: Varying a -> Varying a

asin :: Varying a -> Varying a

acos :: Varying a -> Varying a

atan :: Varying a -> Varying a

sinh :: Varying a -> Varying a

cosh :: Varying a -> Varying a

tanh :: Varying a -> Varying a

asinh :: Varying a -> Varying a

acosh :: Varying a -> Varying a

atanh :: Varying a -> Varying a

log1p :: Varying a -> Varying a

expm1 :: Varying a -> Varying a

log1pexp :: Varying a -> Varying a

log1mexp :: Varying a -> Varying a

Fractional a => Fractional (Varying a)

Methods

(/) :: Varying a -> Varying a -> Varying a

recip :: Varying a -> Varying a

fromRational :: Rational -> Varying a

Num a => Num (Varying a)

Methods

(+) :: Varying a -> Varying a -> Varying a

(-) :: Varying a -> Varying a -> Varying a

(*) :: Varying a -> Varying a -> Varying a

negate :: Varying a -> Varying a

abs :: Varying a -> Varying a

signum :: Varying a -> Varying a

fromInteger :: Integer -> Varying a

IsString a => IsString (Varying a)

Methods

fromString :: String -> Varying a

NFData a => NFData (Varying a)

Methods

rnf :: Varying a -> ()

changes :: Varying a -> Event a

The change event of the given time-varying value.

value :: Varying a -> a

The behaviour value of the given time-varying value.

Events

holdV :: Applicative m => a -> Wire m (Event a) (Varying a)

Hold the latest occurrence of the given event starting with the given initial value. The value switch occurs in the next frame.

holdV' :: Applicative m => a -> Wire m (Event a) (Varying a)

Hold the latest occurrence of the given event starting with the given initial value. The value switch occurs instantly.

scanV :: Applicative m => (a -> b -> b) -> b -> Wire m (Event a) (Varying b)

Left scan and hold of the given event.

Controllers

animateV :: Applicative m => (a -> m b) -> Wire m (Varying a) (Varying b)

Run the given action each time the given time-varying value changes.