Google Code-in: Center help text field
Modifies the grid layout slightly so that the help text which appears when hovering over certain elements is centered with respect to the window, even when there are more buttons on one side.
https://google-melange.appspot.com/gci/task/view/google/gci2012/7968226
{-# LANGUAGE CPP #-}
module Opts
(
getOpts,
) where
import System.Environment
import System.Console.GetOpt
import Data.Maybe ( fromMaybe )
-------------------
import CoreTypes
import Utils
options :: [OptDescr (ServerInfo -> ServerInfo)]
options = [
Option "p" ["port"] (ReqArg readListenPort "PORT") "listen on PORT",
Option "d" ["dedicated"] (ReqArg readDedicated "BOOL") "start as dedicated (True or False)"
]
readListenPort
, readDedicated
:: String -> ServerInfo -> ServerInfo
readListenPort str opts = opts{listenPort = readPort}
where
readPort = fromInteger $ fromMaybe 46631 (maybeRead str :: Maybe Integer)
readDedicated str opts = opts{isDedicated = readDed}
where
readDed = fromMaybe True (maybeRead str :: Maybe Bool)
getOpts :: ServerInfo -> IO ServerInfo
getOpts opts = do
args <- getArgs
case getOpt Permute options args of
(o, [], []) -> return $ foldr ($) opts{runArgs = args} o
(_,_,errs) -> ioError (userError (concat errs ++ usageInfo header options))
where header = "Usage: hedgewars-server [OPTION...]"