blob: 45ce982b61985320188c057bf7352d6b54d24940 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
{-# LANGUAGE ExistentialQuantification, DeriveDataTypeable #-}
module GLDriver ( Driver(..)
, Event
, SomeEvent(..)
, QuitEvent
) where
import Data.Typeable
class Driver a where
initialized :: a -> Bool
initGL :: a -> IO a
deinitGL :: a -> IO ()
nextEvent :: a -> IO (Maybe SomeEvent)
class Typeable a => Event a
data SomeEvent = forall a. Event a => SomeEvent a
fromEvent :: Event a => SomeEvent -> Maybe a
fromEvent (SomeEvent a) = cast a
data QuitEvent = QuitEvent deriving Typeable
instance Event QuitEvent
|
