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35aa2ad8a4
instance for Widget - This makes the module layout more predictable since Brick.Widgets.Core now (mostly) only contains widgets and widget transformations - Utility functions closely related to types are now in Brick.Types - Brick.Types.Internal contains types used internal by the renderer, some are re-exported by Brick.Types
66 lines
1.9 KiB
Haskell
66 lines
1.9 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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module Main where
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import Data.Monoid
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import Graphics.Vty
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( Event, Attr, white, blue, cyan, green, red, yellow
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, black
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)
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import Brick.Main
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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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( (<=>)
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, withAttr
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, vBox
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, str
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)
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import Brick.Util (on, fg)
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import Brick.AttrMap (attrMap, AttrMap)
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ui :: Widget
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ui =
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vBox [ str "This text uses the global default attribute."
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, withAttr "foundFull" $
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str "Specifying an attribute name means we look it up in the attribute tree."
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, (withAttr "foundFgOnly" $
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str ("When we find a value, we merge it with its parent in the attribute")
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<=> str "name tree all the way to the root (the global default).")
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, withAttr "missing" $
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str "A missing attribute name just resumes the search at its parent."
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, withAttr ("general" <> "specific") $
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str "In this way we build complete attribute values by using an inheritance scheme."
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, withAttr "foundFull" $
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str "You can override everything ..."
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, withAttr "foundFgOnly" $
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str "... or only you want to change and inherit the rest."
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, str "Attribute names are assembled with the Monoid append operation to indicate"
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, str "hierarchy levels, e.g. \"window\" <> \"title\"."
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]
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globalDefault :: Attr
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globalDefault = white `on` blue
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theMap :: AttrMap
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theMap = attrMap globalDefault
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[ ("foundFull", white `on` green)
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, ("foundFgOnly", fg red)
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, ("general", yellow `on` black)
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, ("general" <> "specific", fg cyan)
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]
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app :: App () Event
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app =
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App { appDraw = const [ui]
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, appHandleEvent = resizeOrQuit
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, appStartEvent = return
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, appAttrMap = const theMap
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, appChooseCursor = neverShowCursor
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, appLiftVtyEvent = id
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}
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main :: IO ()
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main = defaultMain app ()
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