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binclock.elm
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binclock.elm
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module BinClock where
import Graphics.Element (Element, container, midTop)
import Html (..)
import Html.Attributes (..)
import Signal
import Window
import List
import Bitwise
import Time (..)
import Date
cellCol : Bool -> Html
cellCol bit =
let color = if bit then "light" else "dark"
in div [class ("cell" ++ " " ++ color)] []
cellVal : Int -> Html
cellVal digit = div [class "cell"]
[text (toString digit)]
type alias BitNum = (Int, List Bool)
column : BitNum -> Html
column (digit, bits) =
let cells = (List.map cellCol bits) ++ [cellVal digit]
in div [class "col"] cells
columns : List BitNum -> Html
columns cs =
let cols = List.map column cs
in div [class "colpair"] cols
legend : List Int -> Html
legend digits =
let cells = List.map cellVal digits
in div [class "col legend"] cells
decimalParts : Int -> List Int
decimalParts n = [n // 10, rem n 10]
toBitNum : Int -> BitNum
toBitNum n =
let masks = List.map2 Bitwise.and [8, 4, 2, 1] (List.repeat 4 n)
setp = \x -> x > 0
bits = List.map setp masks
in (n, bits)
view : Time -> Html
view t =
let conv = \x -> x |> decimalParts |> (List.map toBitNum)
d = Date.fromTime t
cols = [Date.hour d, Date.minute d, Date.second d]
|> List.map conv
|> List.map columns
in div [] ([legend [8,4,2,1]] ++ cols)
-- Just stole the kickstarting code from the TODO example
main : Signal Element
main = Signal.map2 scene (every second) Window.dimensions
scene : Time -> (Int,Int) -> Element
scene t (w,h) =
container w h midTop (toElement w h (view t))