module Graphics.UI.Threepenny.Editors.Base
(
Editor(..)
, edited
, contents
, Editable(..)
, EditorDef
, runEditorDef
, (|*|), (|*), (*|)
, (-*-), (-*), (*-)
, editorReadShow
, editorEnumBounded
, editorSum
, editorJust
, Compose(..)
)where
import Data.Functor.Compose
import Graphics.UI.Threepenny.Attributes
import Graphics.UI.Threepenny.Core
import Graphics.UI.Threepenny.Elements
import Graphics.UI.Threepenny.Events
import Graphics.UI.Threepenny.Widgets
import Text.Read
data Editor a = Editor
{ editorTidings :: Tidings a
, editorElement :: Element
}
deriving Functor
edited :: Editor a -> Event a
edited = rumors . editorTidings
contents :: Editor a -> Behavior a
contents = facts . editorTidings
instance Widget (Editor a) where
getElement = editorElement
data Layout
= Horizontal [Layout]
| Vertical [Layout]
| Single Element
vertical, horizontal :: Layout -> Layout -> Layout
vertical (Vertical xx) y = Vertical (xx ++ [y])
vertical x (Vertical yy) = Vertical (x:yy)
vertical x y = Vertical [x,y]
horizontal (Horizontal xx) y = Horizontal (xx ++ [y])
horizontal x (Horizontal yy) = Horizontal (x : yy)
horizontal x y = Horizontal [x,y]
single :: Element -> Layout
single = Single
runLayout :: Layout -> UI Element
runLayout (Vertical ll) = column $ fmap runLayout ll
runLayout (Horizontal ll) = row $ fmap runLayout ll
runLayout (Single x) = return x
data EditorDef a = EditorDef
{ editorDefTidings :: Tidings a
, editorDefLayout :: Layout
}
deriving Functor
editedDef :: EditorDef a -> Event a
editedDef = rumors . editorDefTidings
runEditorDef :: EditorDef a -> UI (Editor a)
runEditorDef def = do
el <- runLayout (editorDefLayout def)
return $ Editor (editorDefTidings def) el
class Editable a where
editor :: Behavior a -> Compose UI EditorDef a
infixl 4 |*|, -*-
infixl 5 |*, *|, -*, *-
(|*|) :: Compose UI EditorDef (b -> a) -> Compose UI EditorDef b -> Compose UI EditorDef a
a |*| b = Compose $ do
a <- getCompose a
b <- getCompose b
let ab = horizontal (editorDefLayout a) (editorDefLayout b)
return $ EditorDef (editorDefTidings a <*> editorDefTidings b) ab
(*|) :: UI Element -> Compose UI EditorDef a -> Compose UI EditorDef a
e *| a = Compose $ do
e <- e
a <- getCompose a
let ea = horizontal (single e) (editorDefLayout a)
return $ EditorDef (editorDefTidings a) ea
(|*) :: Compose UI EditorDef a -> UI Element -> Compose UI EditorDef a
a |* e = Compose $ do
e <- e
a <- getCompose a
let ea = horizontal (editorDefLayout a) (single e)
return $ EditorDef (editorDefTidings a) ea
(-*-) :: Compose UI EditorDef (b -> a) -> Compose UI EditorDef b -> Compose UI EditorDef a
a -*- b = Compose $ do
a <- getCompose a
b <- getCompose b
let ab = vertical (editorDefLayout a) (editorDefLayout b)
return $ EditorDef (editorDefTidings a <*> editorDefTidings b) ab
(*-) :: UI Element -> Compose UI EditorDef a -> Compose UI EditorDef a
e *- a = Compose $ do
e <- e
a <- getCompose a
let ea = vertical (single e) (editorDefLayout a)
return $ EditorDef (editorDefTidings a) ea
(-*) :: Compose UI EditorDef a -> UI Element -> Compose UI EditorDef a
a -* e = Compose $ do
e <- e
a <- getCompose a
let ea = vertical (editorDefLayout a) (single e)
return $ EditorDef (editorDefTidings a) ea
editorReadShow :: (Read a, Show a) => Behavior (Maybe a) -> Compose UI EditorDef (Maybe a)
editorReadShow b = Compose $ do
e <- getCompose $ editor (maybe "" show <$> b)
let readIt "" = Nothing
readIt x = readMaybe x
let t = tidings b (readIt <$> editedDef e)
return $ EditorDef t (editorDefLayout e)
editorEnumBounded
:: (Bounded a, Enum a, Ord a, Show a)
=> Behavior(a -> UI Element) -> Behavior (Maybe a) -> Compose UI EditorDef (Maybe a)
editorEnumBounded display b = Compose $ do
l <- listBox (pure $ enumFrom minBound) b display
return $ EditorDef (tidings b (rumors $ userSelection l)) (single $ getElement l)
editorJust :: (Behavior (Maybe b) -> Compose UI EditorDef (Maybe b))
-> Behavior b
-> Compose UI EditorDef b
editorJust editor b = Compose $ do
e <- getCompose $ editor (Just <$> b)
let ev = filterJust (editedDef e)
return $ EditorDef (tidings b ev) (editorDefLayout e)
data SumWrapper tag a = A {display :: tag, theEditor :: Editor a}
instance Eq tag => Eq (SumWrapper tag a) where A a _ == A b _ = a == b
instance Ord tag => Ord (SumWrapper tag a) where compare (A a _) (A b _) = compare a b
instance Show tag => Show (SumWrapper tag a) where show = show . display
editorSum
:: (Ord tag, Show tag)
=> [(tag, Compose UI EditorDef a)] -> (a -> tag) -> Behavior a -> Compose UI EditorDef a
editorSum options selector ba = Compose $ do
w <- askWindow
options <- traverse (\(tag, Compose mk) -> (tag,) <$> (mk >>= runEditorDef)) options
let bSelected =
let build a =
let tag = selector a
in A tag <$> lookup tag options
in build <$> ba
l <-
listBox (pure $ fmap (uncurry A) options) bSelected (pure (string . show))
nestedEditorDef <- new
_ <-
liftIO $
register (filterJust $ rumors (userSelection l)) $ \x ->
runUI w $ set' children [getElement $ theEditor x] nestedEditorDef
let composed = Vertical [single (getElement l), single nestedEditorDef]
let editedEvents = fmap (edited . snd) options
eTag = filterJust $ fmap display <$> rumors (userSelection l)
taggedOptions = sequenceA [(tag, ) <$> contents e | (tag, e) <- options]
editedTag = filterJust $ flip lookup <$> taggedOptions <@> eTag
editedE = head <$> unions (editedTag : editedEvents)
return $ EditorDef (tidings ba editedE) composed
instance Editable () where
editor b = Compose $ do
t <- new
return $ EditorDef (tidings b never) (single t)
instance a ~ Char => Editable [a] where
editor b = Compose $ do
w <- askWindow
t <- entry b
liftIOLater $ do
initialValue <- currentValue b
_ <- runUI w $ set value initialValue (element t)
return ()
return $ EditorDef (userText t) (single $ getElement t)
instance Editable Bool where
editor b = Compose $ do
t <- sink checked b $ input # set type_ "checkbox"
return $ EditorDef (tidings b $ checkedChange t) (single t)
instance Editable (Maybe Int) where editor = editorReadShow
instance Editable (Maybe Double) where editor = editorReadShow
instance Editable Int where editor = editorJust editor
instance Editable Double where editor = editorJust editor
instance (Editable a, Editable b) => Editable (a,b) where
editor b = (,) <$> editor (fst <$> b) |*| editor (snd <$> b)