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{-# LANGUAGE CPP #-}
------------------------------------------------------------------------------
-- |
-- Module: Xmobar.X11.Draw
-- Copyright: (c) 2018, 2020, 2022 Jose Antonio Ortega Ruiz
-- License: BSD3-style (see LICENSE)
--
-- Maintainer: jao@gnu.org
-- Stability: unstable
-- Portability: portable
-- Created: Sat Nov 24, 2018 18:49
--
--
-- Drawing the xmobar contents
--
------------------------------------------------------------------------------
module Xmobar.X11.Draw (drawInWin) where
import Control.Monad.IO.Class
import Control.Monad.Reader
import Graphics.X11.Xlib hiding (Segment)
import Xmobar.Run.Parsers (Segment)
import Xmobar.X11.Types
#ifdef CAIRO
import Xmobar.X11.CairoDraw
#else
import Xmobar.X11.XlibDraw
#endif
-- | Draws in and updates the window
drawInWin :: Rectangle -> [[Segment]] -> X ()
drawInWin (Rectangle _ _ wid ht) segments = do
r <- ask
let d = display r
w = window r
depth = defaultDepthOfScreen (defaultScreenOfDisplay d)
p <- liftIO $ createPixmap d w wid ht depth
gc <- liftIO $ createGC d w
liftIO $ setGraphicsExposures d gc False
#ifdef CAIRO
drawInPixmap p wid ht segments
#else
drawInPixmap gc p wid ht segments
#endif
-- copy the pixmap with the new string to the window
liftIO $ copyArea d p w gc 0 0 wid ht 0 0
-- free up everything (we do not want to leak memory!)
liftIO $ freeGC d gc
liftIO $ freePixmap d p
-- resync (discard events, we don't read/process events from this display conn)
liftIO $ sync d True
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