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81 lines
2.7 KiB
Haskell
81 lines
2.7 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE CPP #-}
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module Main where
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#if !(MIN_VERSION_base(4,11,0))
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import Data.Monoid
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#endif
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import Graphics.Vty
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( Attr, white, blue, cyan, green, red, yellow
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, black, withURL
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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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, hyperlink
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, modifyDefAttr
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)
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import Brick.Util (on, fg)
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import Brick.AttrMap (attrMap, AttrMap, attrName)
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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 (attrName "foundFull") $
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str "Specifying an attribute name means we look it up in the attribute tree."
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, withAttr (attrName "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 (attrName "missing") $
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str "A missing attribute name just resumes the search at its parent."
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, withAttr (attrName "general" <> attrName "specific") $
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str "In this way we build complete attribute values by using an inheritance scheme."
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, withAttr (attrName "foundFull") $
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str "You can override everything ..."
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, withAttr (attrName "foundFgOnly") $
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str "... or only what 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. attrName \"window\" <> attrName \"title\"."
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, str " "
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, withAttr (attrName "linked") $
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str "This text is hyperlinked in terminals that support hyperlinking."
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, str " "
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, hyperlink "http://www.google.com/" $
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str "This text is also hyperlinked in terminals that support hyperlinking."
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, str " "
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, modifyDefAttr (`withURL` "http://www.google.com/") $
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str "This text is hyperlinked by modifying the default attribute."
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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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[ (attrName "foundFull", white `on` green)
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, (attrName "foundFgOnly", fg red)
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, (attrName "general", yellow `on` black)
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, (attrName "general" <> attrName "specific",
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fg cyan)
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, (attrName "linked", fg yellow `withURL` "http://www.google.com/")
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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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