Reactogon/tests/testArpeggiated.hs

   1 import FRP.Yampa
   2
   3 import MIDI
   4 import Note
   5 import Arpeggiated
   6
   7 import System.IO
   8 import Data.Maybe
   9
  10 ifReadyDo :: Handle -> IO a -> IO (Maybe a)
  11 ifReadyDo hnd x = hReady hnd >>= f
  12    where f True = x >>= return . Just
  13          f _    = return Nothing
  14
  15 main :: IO ()
  16 main = reactimate initInput sensing output arpeggiated
  17
  18 initInput = return (110, NoEvent)
  19
  20 sensing _ = do c <- stdin `ifReadyDo` getChar
  21                let c' = if isJust c
  22                         then Event (NoteOn (toPitch 60) (toVelocity 100))
  23                         else NoEvent
  24                return (1, Just (110,c'))
  25
  26 output _ x = print x >> return False