purpose dependent widget states and widget actions are now stored inside HashMaps
This commit is contained in:
tpajenka
parent
e292633ce4
commit
992c8fd041
@ -2,7 +2,7 @@ module UI.Callbacks where
|
||||
|
||||
|
||||
import qualified Graphics.Rendering.OpenGL.GL as GL
|
||||
import Control.Lens ((^.), (.~), (%~))
|
||||
import Control.Lens ((^.), (.~), (%~), (^?), at)
|
||||
import Control.Monad (liftM, when, unless)
|
||||
import Control.Monad.RWS.Strict (ask, get, modify)
|
||||
import Control.Monad.Trans (liftIO)
|
||||
@ -150,11 +150,11 @@ clickHandler btn pos@(x,y) = do
|
||||
short = w ^. baseProperties.shorthand
|
||||
bound <- w ^. baseProperties.boundary
|
||||
prio <- w ^. baseProperties.priority
|
||||
liftIO $ putStrLn $ "hitting " ++ short ++ ": " ++ show bound ++ " " ++ show prio
|
||||
++ " at [" ++ show x ++ "," ++ show y ++ "]"
|
||||
case w ^. mouseActions of
|
||||
Just ma -> do w' <- (ma ^. onMousePress) btn pos w
|
||||
w'' <- (ma ^. onMouseRelease) btn pos w'
|
||||
liftIO $ putStrLn $ "hitting(" ++ show btn ++ ") " ++ short ++ ": " ++ show bound ++ " "
|
||||
++ show prio ++ " at [" ++ show x ++ "," ++ show y ++ "]"
|
||||
case w ^. eventHandlers.(at MouseEvent) of
|
||||
Just ma -> do w' <- fromJust (ma ^? onMousePress) btn pos w -- TODO unsafe fromJust
|
||||
w'' <- fromJust (ma ^? onMouseRelease) btn pos True w' -- TODO unsafe fromJust
|
||||
return $ Just (uid, w'')
|
||||
Nothing -> return Nothing
|
||||
) $ hits
|
||||
|
||||
278
src/UI/UIBase.hs
278
src/UI/UIBase.hs
@ -3,12 +3,14 @@
|
||||
-- TODO: exclude UIMouseState constructor from export?
|
||||
module UI.UIBase where
|
||||
|
||||
import Control.Lens ((^.), (.~), (%~), (&), ix, to, mapped, traverse, makeLenses)
|
||||
import Control.Lens ((^.), (.~), (%~), (&), ix, mapped, makeLenses)
|
||||
import Control.Monad (liftM)
|
||||
import Data.Array
|
||||
import Data.Bits (xor)
|
||||
import Data.Hashable
|
||||
import qualified Data.HashMap.Strict as Map
|
||||
import Data.Ix ()
|
||||
import Data.Maybe
|
||||
-- import Data.Maybe
|
||||
import GHC.Generics (Generic)
|
||||
|
||||
-- |Unit of screen/window
|
||||
@ -42,48 +44,116 @@ f >: (x, y) = (f x, f y)
|
||||
(*:) = merge (*)
|
||||
{-# INLINABLE (*:) #-}
|
||||
|
||||
-- |Id to reference a specific widget, must be unique.
|
||||
newtype UIId = UIId Int deriving (Eq, Ord, Bounded, Ix, Hashable, Show, Read)
|
||||
|
||||
-- |Mouse buttons processed by the program.
|
||||
data MouseButton = LeftButton | RightButton | MiddleButton | MouseX1 | MouseX2
|
||||
deriving (Eq, Ord, Enum, Ix, Bounded, Generic, Show, Read)
|
||||
|
||||
instance Hashable MouseButton
|
||||
instance Hashable MouseButton where -- TODO: generic deriving creates functions that run forever
|
||||
hash = fromEnum
|
||||
hashWithSalt salt x = (salt * 16777619) `xor` hash x
|
||||
|
||||
firstButton :: MouseButton
|
||||
firstButton = LeftButton
|
||||
---------------------------
|
||||
--- widget state
|
||||
---------------------------
|
||||
-- |A key to reference a specific type of 'WidgetState'.
|
||||
data WidgetStateKey = MouseStateKey
|
||||
deriving (Eq, Ord, Enum, Ix, Bounded, Generic, Show, Read)
|
||||
|
||||
instance Hashable WidgetStateKey where -- TODO: generic deriving creates functions that run forever
|
||||
hash = fromEnum
|
||||
hashWithSalt salt x = (salt * 16777619) `xor` hash x
|
||||
|
||||
lastButton :: MouseButton
|
||||
lastButton = MiddleButton
|
||||
|
||||
-- |The button dependant state of a 'UIMouseState'.
|
||||
data UIMouseStateSingle = MouseStateSingle
|
||||
{ _mouseIsFiring :: Bool -- ^firing if pressed but not confirmed
|
||||
-- |The button dependant state of a 'MouseState'.
|
||||
data MouseButtonState = MouseButtonState
|
||||
{ _mouseIsDragging :: Bool -- ^firing if pressed but not confirmed
|
||||
, _mouseIsDeferred :: Bool
|
||||
-- ^deferred if e. g. dragging but outside component
|
||||
} deriving (Eq, Show)
|
||||
|
||||
-- |An applied state a widget may take, depending on its usage and event handlers.
|
||||
data WidgetState =
|
||||
-- |The state of a mouse reactive ui widget. Referenced by 'MouseStateKey'.
|
||||
MouseState
|
||||
{ _mouseStates :: Array MouseButton MouseButtonState
|
||||
, _mouseIsReady :: Bool -- ^ready if mouse is above component
|
||||
, _mousePixel :: Pixel -- ^current local position of the mouse, only updated if widget is the mouse-active component
|
||||
}
|
||||
deriving (Eq, Show)
|
||||
|
||||
-- |The state of a clickable ui widget.
|
||||
data UIMouseState = MouseState
|
||||
{ _mouseStates :: Array MouseButton UIMouseStateSingle
|
||||
, _mouseIsReady :: Bool -- ^ready if mouse is above component
|
||||
} deriving (Eq, Show)
|
||||
---------------------------
|
||||
--- events
|
||||
---------------------------
|
||||
|
||||
-- |A key to reference a specific 'EventHandler'.
|
||||
data EventKey = MouseEvent | MouseMotionEvent
|
||||
deriving (Eq, Ord, Enum, Ix, Bounded, Generic, Show, Read)
|
||||
|
||||
instance Hashable EventKey where -- TODO: generic deriving creates functions that run forever
|
||||
hash = fromEnum
|
||||
hashWithSalt salt x = (salt * 16777619) `xor` hash x
|
||||
|
||||
--- event handlers
|
||||
|
||||
-- |A handler to react on certain events.
|
||||
data EventHandler m =
|
||||
-- |Handler to control the functionality of a 'GUIWidget' on mouse button events.
|
||||
MouseHandler
|
||||
{
|
||||
-- |The function 'onMousePressed' is called when a button is pressed
|
||||
-- while inside a screen coordinate within the widget ('isInside').
|
||||
_onMousePress :: MouseButton -- ^the pressed button
|
||||
-> Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the possibly altered mouse handler
|
||||
,
|
||||
-- |The function 'onMouseReleased' is called when a button is released
|
||||
-- while the pressing event occured within the widget ('isInside').
|
||||
--
|
||||
-- Thus, the mouse is either within the widget or outside while still dragging.
|
||||
_onMouseRelease :: MouseButton -- ^the released button
|
||||
-> Pixel -- ^screen position
|
||||
-> Bool -- ^@True@ if the event occured inside the widget
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
}
|
||||
|
|
||||
-- |Handler to control the functionality of a 'GUIWidget' on mouse movement.
|
||||
MouseMotionHandler
|
||||
{
|
||||
-- |The function 'onMouseMove' is invoked when the mouse is moved inside the
|
||||
-- widget's space ('isInside').
|
||||
_onMouseMove :: Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
,
|
||||
-- |The function 'onMouseMove' is invoked when the mouse enters the
|
||||
-- widget's space ('isInside').
|
||||
_onMouseEnter :: Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
,
|
||||
-- |The function 'onMouseMove' is invoked when the mouse leaves the
|
||||
-- widget's space ('isInside').
|
||||
_onMouseLeave :: Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
}
|
||||
deriving ()
|
||||
|
||||
|
||||
-- |Switches primary and secondary mouse actions.
|
||||
-- "monad type" "widget type" "original handler"
|
||||
data MouseHandlerSwitch h = MouseHandlerSwitch h deriving (Eq, Show)
|
||||
|
||||
-- |A 'UI.UIClasses.MouseHandler' with button behaviour.
|
||||
data ButtonHandler m w = ButtonHandler
|
||||
{ _action :: w -> Pixel -> m w }
|
||||
instance Show (ButtonHandler m w) where
|
||||
show _ = "ButtonHandler ***"
|
||||
---------------------------
|
||||
--- widgets
|
||||
---------------------------
|
||||
|
||||
-- |A @GUIWidget@ is a visual object the HUD is composed of.
|
||||
data GUIWidget m = Widget
|
||||
{_baseProperties :: GUIBaseProperties m
|
||||
,_mouseActions :: Maybe (GUIMouseActions m)
|
||||
,_graphics :: GUIGraphics m
|
||||
,_widgetStates :: Map.HashMap WidgetStateKey WidgetState -- TODO? unsave mapping
|
||||
,_eventHandlers :: Map.HashMap EventKey (EventHandler m) -- no guarantee that data match key
|
||||
}
|
||||
|
||||
-- |Base properties are fundamental settings of any 'GUIWidget'.
|
||||
@ -118,46 +188,6 @@ data GUIBaseProperties m = BaseProperties
|
||||
_shorthand :: String
|
||||
}
|
||||
|
||||
-- |Mouse actions control the functionality of a 'GUIWidget' on mouse events.
|
||||
data GUIMouseActions m = MouseActions
|
||||
{
|
||||
-- |The @_mouseState@ function returns the current mouse state of a widget.
|
||||
_mouseState :: UIMouseState
|
||||
,
|
||||
-- |The function 'onMousePressed' is called when a button is pressed
|
||||
-- while inside a screen coordinate within the widget ('isInside').
|
||||
_onMousePress :: MouseButton -- ^the pressed button
|
||||
-> Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the possibly altered mouse handler
|
||||
,
|
||||
-- |The function 'onMouseReleased' is called when a button is released
|
||||
-- while the pressing event occured within the widget ('isInside').
|
||||
--
|
||||
-- Thus, the mouse is either within the widget or outside while still dragging.
|
||||
_onMouseRelease :: MouseButton -- ^the released button
|
||||
-> Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
,
|
||||
-- |The function 'onMouseMove' is invoked when the mouse is moved inside the
|
||||
-- widget's space ('isInside').
|
||||
_onMouseMove :: Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
,
|
||||
-- |The function 'onMouseMove' is invoked when the mouse enters the
|
||||
-- widget's space ('isInside').
|
||||
_onMouseEnter :: Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
,
|
||||
-- |The function 'onMouseMove' is invoked when the mouse leaves the
|
||||
-- widget's space ('isInside').
|
||||
_onMouseLeave :: Pixel -- ^screen position
|
||||
-> GUIWidget m -- ^widget the event is invoked on
|
||||
-> m (GUIWidget m) -- ^widget after the event and the altered handler
|
||||
}
|
||||
|
||||
|
||||
-- |@GUIGraphics@ functions define the look of a 'GUIWidget'.
|
||||
@ -165,74 +195,82 @@ data GUIMouseActions m = MouseActions
|
||||
data GUIGraphics m = Graphics
|
||||
{temp :: m Int}
|
||||
|
||||
$(makeLenses ''UIMouseState)
|
||||
$(makeLenses ''UIMouseStateSingle)
|
||||
$(makeLenses ''WidgetStateKey)
|
||||
$(makeLenses ''WidgetState)
|
||||
$(makeLenses ''MouseButtonState)
|
||||
$(makeLenses ''EventKey)
|
||||
$(makeLenses ''EventHandler)
|
||||
$(makeLenses ''GUIWidget)
|
||||
$(makeLenses ''GUIBaseProperties)
|
||||
$(makeLenses ''GUIMouseActions)
|
||||
$(makeLenses ''GUIGraphics)
|
||||
|
||||
initialMouseStateS :: UIMouseStateSingle
|
||||
initialMouseStateS = MouseStateSingle False False
|
||||
{-# INLINE initialMouseStateS #-}
|
||||
initialButtonState :: MouseButtonState
|
||||
initialButtonState = MouseButtonState False False
|
||||
{-# INLINE initialButtonState #-}
|
||||
|
||||
-- |Creates a @UIMouseState@ its @_mouseStates@ are valid 'UIMouseStateSingle' for any @MouseButton@
|
||||
-- provided in the passed list.
|
||||
initialMouseState :: UIMouseState
|
||||
initialMouseState = MouseState (array (minBound, maxBound) [(i, initialMouseStateS) | i <- range (minBound, maxBound)])
|
||||
False
|
||||
initialMouseState :: WidgetState
|
||||
initialMouseState = MouseState (array (minBound, maxBound) [(i, initialButtonState) | i <- range (minBound, maxBound)])
|
||||
False (0, 0)
|
||||
{-# INLINE initialMouseState #-}
|
||||
|
||||
emptyMouseAction :: (Monad m) => GUIMouseActions m
|
||||
emptyMouseAction = MouseActions initialMouseState empty'' empty'' empty' empty' empty'
|
||||
where empty' _ = return
|
||||
empty'' _ _ = return
|
||||
|
||||
-- TODO: combined mouse handler
|
||||
|
||||
-- TODO? breaks if array not of sufficient size -- will be avoided by excluding constructor export
|
||||
-- |Creates a @GUIMouseActions@ handler that enables button clicks.
|
||||
--
|
||||
-- The action is peformed right before the button state change.
|
||||
buttonMouseActions :: (Monad m) => (MouseButton -> GUIWidget m -> Pixel -> m (GUIWidget m)) -- ^action on button press
|
||||
-> GUIMouseActions m
|
||||
buttonMouseActions a = MouseActions initialMouseState press' release' move' enter' leave'
|
||||
-- |Creates a 'MouseHandler' that sets a widget's 'MouseButtonState' properties if present,
|
||||
-- only fully functional in conjunction with 'setMouseMotionStateActions'.
|
||||
setMouseStateActions :: (Monad m) => EventHandler m
|
||||
setMouseStateActions = MouseHandler press' release'
|
||||
where
|
||||
-- |Change 'UIMouseState's '_mouseIsFiring' to @True@.
|
||||
-- |Change 'MouseButtonState's '_mouseIsDragging' to @True@.
|
||||
press' b _ w =
|
||||
return $ w & mouseActions.traverse.mouseState.mouseStates.(ix b).mouseIsFiring .~ True
|
||||
return $ w & widgetStates.(ix MouseStateKey).mouseStates.(ix b).mouseIsDragging .~ True
|
||||
|
||||
-- |Change 'UIMouseState's '_mouseIsFiring' and '_mouseIsDeferred' to @False@ and
|
||||
-- call action if '_mouseIsFiring' was @True@.
|
||||
release' b p w =
|
||||
let fire = w ^. mouseActions.(to fromJust).mouseState.mouseStates.(to (!b)).mouseIsFiring -- TODO? may break if initialized and called wrongly
|
||||
in do w' <- if fire
|
||||
then a b w p
|
||||
else return w
|
||||
return $ w' & mouseActions.traverse.mouseState.mouseStates.(ix b) %~
|
||||
(mouseIsFiring .~ False) . (mouseIsDeferred .~ False)
|
||||
-- |Change 'MouseButtonState's '_mouseIsDragging' and '_mouseIsDeferred' to @False@.
|
||||
release' b _ _ w =
|
||||
return $ w & widgetStates.(ix MouseStateKey).mouseStates.(ix b) %~
|
||||
(mouseIsDragging .~ False) . (mouseIsDeferred .~ False)
|
||||
|
||||
-- |Creates a 'MouseHandler' that sets a widget's 'WidgetState MouseState' properties if present,
|
||||
-- only fully functional in conjunction with 'setMouseStateActions'.
|
||||
setMouseMotionStateActions :: (Monad m) => EventHandler m
|
||||
setMouseMotionStateActions = MouseMotionHandler move' enter' leave'
|
||||
where
|
||||
-- |Updates mouse position.
|
||||
move' p w = return $ w & widgetStates.(ix MouseStateKey).mousePixel .~ p
|
||||
|
||||
-- |Do nothing.
|
||||
move' _ = return
|
||||
|
||||
-- |Set 'UIMouseState's '_mouseIsReady' to @True@ and
|
||||
-- update dragging state (only drag if inside widget).
|
||||
-- In detail, change 'UIMouseState's '_mouseIsDeferred' to '_mouseIsFiring's current value
|
||||
-- and set '_mouseIsFiring' to @False@.
|
||||
enter' _ w = return $ w & mouseActions.traverse.mouseState %~ (mouseIsReady .~ True)
|
||||
.(mouseStates.mapped %~ (mouseIsDeferred .~ False)
|
||||
-- following line executed BEFORE above line
|
||||
.(\sState -> sState & mouseIsFiring .~ not (sState ^. mouseIsDeferred)))
|
||||
-- |Sets '_mouseIsReady' to @True@, changes '_mouseIsDeferred' to '_mouseIsDragging's current
|
||||
-- value and sets '_mouseIsDragging' to @False@.
|
||||
enter' p w = return $ w & widgetStates.(ix MouseStateKey)
|
||||
%~ (mouseIsReady .~ True) . (mousePixel .~ p)
|
||||
. (mouseStates.mapped %~ (mouseIsDeferred .~ False)
|
||||
-- following line executed BEFORE above line
|
||||
. (\sState -> sState & mouseIsDragging .~ not (sState ^. mouseIsDeferred)))
|
||||
|
||||
|
||||
-- |Set 'UIMouseState's 'buttonstateIsReady' to @False@ and
|
||||
-- update dragging state (only drag if inside widget).
|
||||
-- In detail, change 'UIMouseState's '_buttonstateIsFiring' to '_buttonstateIsDeferred's current value
|
||||
-- and set '_buttonstateIsDeferred's' to @False@.
|
||||
leave' _ w = return $ w & mouseActions.traverse.mouseState %~ (mouseIsReady .~ False)
|
||||
.(mouseStates.mapped %~ (mouseIsFiring .~ False)
|
||||
-- following line executed BEFORE above line
|
||||
.(\sState -> sState & mouseIsDeferred .~ not (sState ^. mouseIsFiring)))
|
||||
-- |Sets '_mouseIsReady' to @False@, changes '_mouseIsDragging' to '_mouseIsDeferred's current
|
||||
-- value and sets '_mouseIsDeferred' to @False@.
|
||||
leave' p w = return $ w & widgetStates.(ix MouseStateKey)
|
||||
%~ (mouseIsReady .~ False) . (mousePixel .~ p)
|
||||
. (mouseStates.mapped %~ (mouseIsDragging .~ False)
|
||||
-- following line executed BEFORE above line
|
||||
. (\sState -> sState & mouseIsDeferred .~ not (sState ^. mouseIsDragging)))
|
||||
|
||||
|
||||
-- TODO? breaks if array not of sufficient size -- will be avoided by excluding constructor export
|
||||
-- |Creates a MouseHandler that reacts on mouse clicks.
|
||||
--
|
||||
-- Does /not/ update 'WidgetState MouseState'!
|
||||
buttonMouseActions :: (Monad m) => (MouseButton -> GUIWidget m -> Pixel -> m (GUIWidget m)) -- ^action on button press
|
||||
-> EventHandler m
|
||||
buttonMouseActions a = MouseHandler press' release'
|
||||
where
|
||||
press' _ _ = return
|
||||
|
||||
release' b p isIn w =
|
||||
if isIn
|
||||
then a b w p
|
||||
else return w
|
||||
|
||||
emptyGraphics :: (Monad m) => GUIGraphics m
|
||||
emptyGraphics = Graphics (return 3)
|
||||
@ -243,14 +281,14 @@ isInsideRect (x,y,w,h) (x',y') = (x' - x <= w) && (x' - x >= 0) && (y' - y <= h)
|
||||
rectangularBase :: (Monad m) => (ScreenUnit, ScreenUnit, ScreenUnit, ScreenUnit) -> [UIId] -> Int -> String -> GUIBaseProperties m
|
||||
rectangularBase bnd chld prio short =
|
||||
BaseProperties (return bnd) (return chld)
|
||||
(\w p -> liftM (`isInsideRect` p) (w ^. baseProperties.boundary))
|
||||
(\w p -> liftM (`isInsideRect` p) (w ^. baseProperties.boundary)) -- isInside
|
||||
(return prio) short
|
||||
|
||||
debugShowWidget' :: (Monad m) => GUIWidget m -> m String
|
||||
debugShowWidget' (Widget base mouse _) = do
|
||||
debugShowWidget' (Widget base _ _ handler) = do
|
||||
bnd <- base ^. boundary
|
||||
chld <- base ^. children
|
||||
prio <- base ^. priority
|
||||
let short = base ^. shorthand
|
||||
return $ concat [short,"| boundary:", show bnd, ", children:", show chld,
|
||||
",priority:",show prio, maybe "" (const ", with mouse handler") mouse]
|
||||
",priority:",show prio, maybe "" (const ", with mouse handler") (Map.lookup MouseEvent handler)]
|
||||
|
||||
@ -16,14 +16,16 @@ import UI.UIBase
|
||||
|
||||
createContainer :: (Monad m) => (ScreenUnit, ScreenUnit, ScreenUnit, ScreenUnit) -> [UIId] -> Int -> GUIWidget m
|
||||
createContainer bnd chld prio = Widget (rectangularBase bnd chld prio "CNT")
|
||||
Nothing
|
||||
emptyGraphics
|
||||
emptyGraphics
|
||||
Map.empty -- widget states
|
||||
Map.empty -- event handlers
|
||||
|
||||
|
||||
createPanel :: (ScreenUnit, ScreenUnit, ScreenUnit, ScreenUnit) -> [UIId] -> Int -> GUIWidget Pioneers
|
||||
createPanel bnd chld prio = Widget (rectangularBase bnd chld prio "PNL" & boundary .~ autosize')
|
||||
Nothing
|
||||
emptyGraphics
|
||||
emptyGraphics
|
||||
Map.empty -- widget states
|
||||
Map.empty -- event handlers
|
||||
where
|
||||
autosize' :: Pioneers (ScreenUnit, ScreenUnit, ScreenUnit, ScreenUnit)
|
||||
autosize' = do
|
||||
@ -38,5 +40,6 @@ createPanel bnd chld prio = Widget (rectangularBase bnd chld prio "PNL" & bounda
|
||||
|
||||
createButton :: (Monad m) => (ScreenUnit, ScreenUnit, ScreenUnit, ScreenUnit) -> Int -> (MouseButton -> GUIWidget m -> Pixel -> m (GUIWidget m)) -> GUIWidget m
|
||||
createButton bnd prio action = Widget (rectangularBase bnd [] prio "BTN")
|
||||
(Just $ buttonMouseActions action)
|
||||
emptyGraphics
|
||||
emptyGraphics
|
||||
(Map.fromList [(MouseStateKey, initialMouseState)]) -- widget states
|
||||
(Map.fromList [(MouseEvent, buttonMouseActions action)]) -- event handlers
|
||||
|
||||
Loading…
Reference in New Issue
Block a user