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|
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Util.XUtils
-- Copyright : (c) 2007 Andrea Rossato
-- License : BSD-style (see xmonad/LICENSE)
--
-- Maintainer : andrea.rossato@unibz.it
-- Stability : unstable
-- Portability : unportable
--
-- A module for painting on the screen
--
-----------------------------------------------------------------------------
module XMonad.Util.XUtils (
-- * Usage:
-- $usage
averagePixels
, createNewWindow
, showWindow
, hideWindow
, deleteWindow
, paintWindow
, paintAndWrite
, stringToPixel
) where
import Data.Maybe
import XMonad
import XMonad.Util.Font
import Control.Monad
-- $usage
-- See "XMonad.Layout.Tabbed" or "XMonad.Layout.DragPane" for usage
-- examples
-- | Compute the weighted average the colors of two given Pixel values.
averagePixels :: Pixel -> Pixel -> Double -> X Pixel
averagePixels p1 p2 f =
do d <- asks display
let cm = defaultColormap d (defaultScreen d)
[Color _ r1 g1 b1 _,Color _ r2 g2 b2 _] <- io $ queryColors d cm [Color p1 0 0 0 0,Color p2 0 0 0 0]
let mn x1 x2 = round (fromIntegral x1 * f + fromIntegral x2 * (1-f))
Color p _ _ _ _ <- io $ allocColor d cm (Color 0 (mn r1 r2) (mn g1 g2) (mn b1 b2) 0)
return p
-- | Create a simple window given a rectangle. If Nothing is given
-- only the exposureMask will be set, otherwise the Just value.
-- Use 'showWindow' to map and hideWindow to unmap.
createNewWindow :: Rectangle -> Maybe EventMask -> String -> Bool -> X Window
createNewWindow (Rectangle x y w h) m col o = do
d <- asks display
rw <- asks theRoot
c <- stringToPixel d col
win <- io $ mkWindow d (defaultScreenOfDisplay d) rw x y w h c o
case m of
Just em -> io $ selectInput d win em
Nothing -> io $ selectInput d win exposureMask
return win
-- | Map a window
showWindow :: Window -> X ()
showWindow w = do
d <- asks display
io $ mapWindow d w
-- | unmap a window
hideWindow :: Window -> X ()
hideWindow w = do
d <- asks display
io $ unmapWindow d w
-- | destroy a window
deleteWindow :: Window -> X ()
deleteWindow w = do
d <- asks display
io $ destroyWindow d w
-- | Fill a window with a rectangle and a border
paintWindow :: Window -- ^ The window where to draw
-> Dimension -- ^ Window width
-> Dimension -- ^ Window height
-> Dimension -- ^ Border width
-> String -- ^ Window background color
-> String -- ^ Border color
-> X ()
paintWindow w wh ht bw c bc =
paintWindow' w (Rectangle 0 0 wh ht) bw c bc Nothing
-- | Fill a window with a rectangle and a border, and write a string at given position
paintAndWrite :: Window -- ^ The window where to draw
-> XMonadFont -- ^ XMonad Font for drawing
-> Dimension -- ^ Window width
-> Dimension -- ^ Window height
-> Dimension -- ^ Border width
-> String -- ^ Window background color
-> String -- ^ Border color
-> String -- ^ String color
-> String -- ^ String background color
-> Align -- ^ String 'Align'ment
-> String -- ^ String to be printed
-> X ()
paintAndWrite w fs wh ht bw bc borc ffc fbc al str = do
(x,y) <- stringPosition fs (Rectangle 0 0 wh ht) al str
paintWindow' w (Rectangle x y wh ht) bw bc borc ms
where ms = Just (fs,ffc,fbc,str)
-- This stuff is not exported
paintWindow' :: Window -> Rectangle -> Dimension -> String -> String -> Maybe (XMonadFont,String,String,String) -> X ()
paintWindow' win (Rectangle x y wh ht) bw color b_color str = do
d <- asks display
p <- io $ createPixmap d win wh ht (defaultDepthOfScreen $ defaultScreenOfDisplay d)
gc <- io $ createGC d p
-- draw
io $ setGraphicsExposures d gc False
[color',b_color'] <- mapM (stringToPixel d) [color,b_color]
-- we start with the border
io $ setForeground d gc b_color'
io $ fillRectangle d p gc 0 0 wh ht
-- and now again
io $ setForeground d gc color'
io $ fillRectangle d p gc (fi bw) (fi bw) ((wh - (bw * 2))) (ht - (bw * 2))
when (isJust str) $ do
let (xmf,fc,bc,s) = fromJust str
printStringXMF d p xmf gc fc bc x y s
-- copy the pixmap over the window
io $ copyArea d p win gc 0 0 wh ht 0 0
-- free the pixmap and GC
io $ freePixmap d p
io $ freeGC d gc
-- | Creates a window with the possibility of setting some attributes.
-- Not exported.
mkWindow :: Display -> Screen -> Window -> Position
-> Position -> Dimension -> Dimension -> Pixel -> Bool -> IO Window
mkWindow d s rw x y w h p o = do
let visual = defaultVisualOfScreen s
attrmask = cWOverrideRedirect .|. cWBackPixel .|. cWBorderPixel
allocaSetWindowAttributes $
\attributes -> do
set_override_redirect attributes o
set_border_pixel attributes p
set_background_pixel attributes p
createWindow d rw x y w h 0 (defaultDepthOfScreen s)
inputOutput visual attrmask attributes
-- | Short-hand for 'fromIntegral'
fi :: (Integral a, Num b) => a -> b
fi = fromIntegral
|
