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https://github.com/jtdaugherty/brick.git
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65 lines
1.7 KiB
Haskell
65 lines
1.7 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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module Main where
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import Data.Monoid
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import qualified Graphics.Vty as V
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import qualified Brick.Main as M
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import Brick.Types
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( Widget
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)
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import Brick.Widgets.Core
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( padAll
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, str
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)
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import qualified Brick.Widgets.Dialog as D
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import qualified Brick.Widgets.Center as C
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import qualified Brick.AttrMap as A
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import Brick.Util (on, bg)
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import qualified Brick.Types as T
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data Choice = Red | Blue | Green
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deriving Show
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drawUI :: D.Dialog Choice -> [Widget ()]
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drawUI d = [ui]
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where
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ui = D.renderDialog d $ C.hCenter $ padAll 1 $ str "This is the dialog body."
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appEvent :: D.Dialog Choice -> V.Event -> T.EventM () (T.Next (D.Dialog Choice))
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appEvent d ev =
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case ev of
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V.EvKey V.KEsc [] -> M.halt d
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V.EvKey V.KEnter [] -> M.halt d
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_ -> M.continue =<< D.handleDialogEvent ev d
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initialState :: D.Dialog Choice
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initialState = D.dialog (Just "Title") (Just (0, choices)) 50
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where
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choices = [ ("Red", Red)
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, ("Blue", Blue)
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, ("Green", Green)
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]
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theMap :: A.AttrMap
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theMap = A.attrMap V.defAttr
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[ (D.dialogAttr, V.white `on` V.blue)
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, (D.buttonAttr, V.black `on` V.white)
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, (D.buttonSelectedAttr, bg V.yellow)
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]
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theApp :: M.App (D.Dialog Choice) V.Event ()
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theApp =
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M.App { M.appDraw = drawUI
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, M.appChooseCursor = M.showFirstCursor
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, M.appHandleEvent = appEvent
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, M.appStartEvent = return
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, M.appAttrMap = const theMap
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, M.appLiftVtyEvent = id
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}
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main :: IO ()
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main = do
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d <- M.defaultMain theApp initialState
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putStrLn $ "You chose: " <> show (D.dialogSelection d)
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