brick/programs/ViewportScrollDemo.hs
Markus Hauck e59559b0d1 Apply hlint hints
- programs/LayerDemo: combine imports
- programs/SuspendAndResumeDemo: redundant do
- programs/ViewportScrollDemo: unused pragma
- src/Brick/Main: redundant do
- src/Brick/Widgets/Center: use fromMaybe
- src/Brick/Widgets/Core: combine imports, redundant do, use >=>
- src/Brick/Widgets/Internals: redundant '$'
- src/Brick/Widgets/List: use fromMaybe
- src/Brick/Widgets/ProgressBar: use fromMaybe
2015-12-09 20:15:09 +01:00

86 lines
2.7 KiB
Haskell

{-# LANGUAGE OverloadedStrings #-}
module Main where
import Control.Applicative
import Control.Monad (void)
import Data.Monoid
import Data.Default
import qualified Graphics.Vty as V
import qualified Brick.Types as T
import qualified Brick.Main as M
import qualified Brick.Widgets.Center as C
import qualified Brick.Widgets.Border as B
import Brick.Types
( Widget
, ViewportType(Horizontal, Vertical, Both)
)
import Brick.Widgets.Core
( hLimit
, vLimit
, hBox
, vBox
, viewport
, str
)
vp1Name :: T.Name
vp1Name = "demo1"
vp2Name :: T.Name
vp2Name = "demo2"
vp3Name :: T.Name
vp3Name = "demo3"
drawUi :: () -> [Widget]
drawUi = const [ui]
where
ui = C.center $ B.border $ hLimit 60 $ vLimit 21 $
vBox [ pair, B.hBorder, singleton ]
singleton = viewport vp3Name Both $
vBox $ str "Press ctrl-arrow keys to scroll this viewport horizontally and vertically."
: (str <$> [ "Line " <> show i | i <- [2..25::Int] ])
pair = hBox [ viewport vp1Name Vertical $
vBox $ str "Press up and down arrow keys" :
str "to scroll this viewport." :
(str <$> [ "Line " <> (show i) | i <- [3..50::Int] ])
, B.vBorder
, viewport vp2Name Horizontal $
str "Press left and right arrow keys to scroll this viewport."
]
vp1Scroll :: M.ViewportScroll
vp1Scroll = M.viewportScroll vp1Name
vp2Scroll :: M.ViewportScroll
vp2Scroll = M.viewportScroll vp2Name
vp3Scroll :: M.ViewportScroll
vp3Scroll = M.viewportScroll vp3Name
appEvent :: () -> V.Event -> T.EventM (T.Next ())
appEvent _ (V.EvKey V.KDown [V.MCtrl]) = M.vScrollBy vp3Scroll 1 >> M.continue ()
appEvent _ (V.EvKey V.KUp [V.MCtrl]) = M.vScrollBy vp3Scroll (-1) >> M.continue ()
appEvent _ (V.EvKey V.KRight [V.MCtrl]) = M.hScrollBy vp3Scroll 1 >> M.continue ()
appEvent _ (V.EvKey V.KLeft [V.MCtrl]) = M.hScrollBy vp3Scroll (-1) >> M.continue ()
appEvent _ (V.EvKey V.KDown []) = M.vScrollBy vp1Scroll 1 >> M.continue ()
appEvent _ (V.EvKey V.KUp []) = M.vScrollBy vp1Scroll (-1) >> M.continue ()
appEvent _ (V.EvKey V.KRight []) = M.hScrollBy vp2Scroll 1 >> M.continue ()
appEvent _ (V.EvKey V.KLeft []) = M.hScrollBy vp2Scroll (-1) >> M.continue ()
appEvent _ (V.EvKey V.KEsc []) = M.halt ()
appEvent _ _ = M.continue ()
app :: M.App () V.Event
app =
M.App { M.appDraw = drawUi
, M.appStartEvent = return
, M.appHandleEvent = appEvent
, M.appAttrMap = const def
, M.appLiftVtyEvent = id
, M.appChooseCursor = M.neverShowCursor
}
main :: IO ()
main = void $ M.defaultMain app ()