suavemente

| Hackage

Dedication

Today's kitchen is all about a well-planned space that makes cooking a completely interactive experience among family and friends.

Candice Olson

Overview

Suavemente is an applicative functor capable of seamlessly talking to HTML elements. Running a suavemente program automatically spins up a webserver and hooks up its pages with websockets. The use case is to quickly deploy simple, interactive Haskell programs without needing to figure out how the fuck GHCJS works.

Example

{-# LANGUAGE ApplicativeDo #-}

module Main where

import Diagrams.Backend.SVG
import Diagrams.Prelude hiding (rad)
import Web.Suavemente


main :: IO ()
main = suavemente $ do
  rad <- slider "Radius" 1 10 5
  r   <- realSlider "Red" 0 1 0.05 1
  g   <- realSlider "Green" 0 1 0.05 1
  b   <- realSlider "Blue" 0 1 0.05 1
  x   <- slider "X" 0 20 10
  y   <- slider "Y" 0 20 10

  pure (
    circle rad
            # fc (sRGB r g b)
            # translate (r2 (x, y))
            # rectEnvelope (p2 (0, 0)) (r2 (20, 20))
    :: Diagram B)

To Do

The "protocol" is disgusting---it just tries to read the incoming websocket data. A better approach would be to hook it up via FromJSON, but it's nontrivial to get JSON out of a web form and I cbf.

Pull requests are welcome!