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| -rw-r--r-- | XUtils.hs | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/XUtils.hs b/XUtils.hs new file mode 100644 index 0000000..a4f14d8 --- /dev/null +++ b/XUtils.hs @@ -0,0 +1,151 @@ +----------------------------------------------------------------------------- +-- | +-- Module : XMonadContrib.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 screem +-- +----------------------------------------------------------------------------- + +module XMonadContrib.XUtils ( + -- * Usage: + -- $usage + stringToPixel + , initFont + , createNewWindow + , showWindow + , hideWindow + , deleteWindow + , paintWindow + , paintAndWrite + ) where + + +import Graphics.X11.Xlib +import Graphics.X11.Xlib.Extras + +import Control.Monad.Reader +import Data.Maybe +import XMonad +import Operations + +-- $usage +-- See Tabbed or DragPane for usage examples + +-- | Get the Pixel value for a named color: if an invalid name is +-- given the black pixel will be returned. +stringToPixel :: String -> X Pixel +stringToPixel s = do + d <- asks display + return =<< io $ catch (getIt d) (fallBack d) + where getIt d = initColor d s + fallBack d = const $ return $ blackPixel d (defaultScreen d) + +-- | Given a fontname returns the fonstructure. If the font name is +-- not valid the default font will be loaded and returned. +initFont :: String -> X FontStruct +initFont s = do + d <- asks display + return =<< io $ catch (getIt d) (fallBack d) + where getIt d = loadQueryFont d s + fallBack d = const $ loadQueryFont d "-misc-fixed-*-*-*-*-10-*-*-*-*-*-*-*" + +-- | 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 -> X Window +createNewWindow (Rectangle x y w h) m = do + d <- asks display + rw <- asks theRoot + win <- io $ createSimpleWindow d rw x y w h 0 0 0 + 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 + -> FontStruct -- ^ The FontStruct + -> Dimension -- ^ Window width + -> Dimension -- ^ Window height + -> Dimension -- ^ Border width + -> String -- ^ Window background color + -> String -- ^ Border color + -> Position -- ^ String x position + -> Position -- ^ String y position + -> String -- ^ String color + -> String -- ^ String background color + -> String -- ^ String to be printed + -> X () +paintAndWrite w fs wh ht bw bc borc x y ffc fbc str = + paintWindow' w (Rectangle x y wh ht) bw bc borc (Just (fs,ffc,fbc,str)) + +-- This stuf is not exported + +paintWindow' :: Window -> Rectangle -> Dimension -> String -> String -> Maybe (FontStruct,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 + let fi = fromIntegral + -- draw + io $ setGraphicsExposures d gc False + [c',bc'] <- mapM stringToPixel [color,b_color] + -- we start with the border + io $ setForeground d gc bc' + io $ fillRectangle d p gc 0 0 wh ht + -- and now again + io $ setForeground d gc c' + io $ fillRectangle d p gc (fi bw) (fi bw) ((wh - (bw * 2))) (ht - (bw * 2)) + when (isJust str) $ do + let (fs,fc,bc,s) = fromJust str + io $ setFont d gc $ fontFromFontStruct fs + printString d p gc fc bc x y s + -- copy the pixmap over the wind + 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 + +-- | Prints a string on a 'Drawable' +printString :: Display -> Drawable -> GC -> String -> String + -> Position -> Position -> String -> X () +printString d drw gc fc bc x y s = do + [fc',bc'] <- mapM stringToPixel [fc,bc] + io $ setForeground d gc fc' + io $ setBackground d gc bc' + io $ drawImageString d drw gc x y s |