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https://github.com/jtdaugherty/brick.git
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fc8cfe3b4a
This change makes it possible for brick to extent the event space using its own event notions in addition those provided by Vty and the application itself. This means we no longer need the user to provide the type and appLiftVtyEvent went away. This makes pattern-matching in event handlers a little noisier with the benefit that we can now add events like mouse clicks or drags to the event type.
65 lines
1.9 KiB
Haskell
65 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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( 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 n
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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 () e ()
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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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}
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main :: IO ()
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main = defaultMain app ()
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