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75 lines
3.4 KiB
Haskell
75 lines
3.4 KiB
Haskell
{-# OPTIONS -fglasgow-exts #-}
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-----------------------------------------------------------------------------
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-- |
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-- Module : XMonadContrib.Decoration
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-- Copyright : (c) David Roundy <droundy@darcs.net>
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-- License : BSD-style (see LICENSE)
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--
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-- Maintainer : David Roundy <droundy@darcs.net>
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-- Stability : unstable
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-- Portability : unportable
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--
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-- A module to be used to easily define decorations.
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--
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-----------------------------------------------------------------------------
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module XMonadContrib.Decoration (
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-- * Usage
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-- $usage
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newDecoration
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) where
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import Data.Bits ( (.|.) )
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import Control.Monad.Reader ( asks )
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import Graphics.X11.Xlib
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import Graphics.X11.Xlib.Extras ( Event(AnyEvent,ButtonEvent), ev_subwindow, ev_event_type, ev_window )
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import XMonadContrib.LayoutHelpers ( ModLay, layoutModify, idModDo )
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import XMonad
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import Operations ( UnDoLayout(UnDoLayout) )
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-- $usage
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-- You can use this module for writing other extensions.
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-- See, for instance, "XMonadContrib.Tabbed"
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newDecoration :: Window -> Rectangle -> Int -> Pixel -> Pixel -> String
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-> (Display -> Window -> GC -> FontStruct -> X ())
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-> X () -> Layout a -> X (Layout a)
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newDecoration decfor (Rectangle x y w h) th fg bg fn draw click l = do
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d <- asks display
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rt <- asks theRoot
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win <- io $ createSimpleWindow d rt x y w h (fromIntegral th) fg bg
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io $ selectInput d win $ exposureMask .|. buttonPressMask
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io $ mapWindow d win
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io $ restackWindows d $ decfor : [win]
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let hook :: SomeMessage -> X (Maybe (ModLay a))
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hook sm | Just e <- fromMessage sm = handle_event e >> return Nothing
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| Just UnDoLayout == fromMessage sm = io (destroyWindow d win) >> return (Just id)
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| otherwise = return Nothing
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handle_event (ButtonEvent {ev_subwindow = thisw,ev_event_type = t})
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| t == buttonPress && thisw == win = click
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handle_event (ButtonEvent {ev_window = thisw,ev_event_type = t})
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| t == buttonPress && thisw == win = click
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handle_event (AnyEvent {ev_window = thisw, ev_event_type = t})
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| thisw == win && t == expose = withGC win fn draw
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| thisw == decfor && t == propertyNotify = withGC win fn draw
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handle_event _ = return ()
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return $ layoutModify idModDo hook l
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-- FIXME: withGC should use bracket (but can't, unless draw is an IO thing)
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withGC :: Drawable -> String -> (Display -> Drawable -> GC -> FontStruct -> X ()) -> X ()
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withGC w fn f = withDisplay $ \d -> do gc <- io $ createGC d w
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let fontname = if fn == ""
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then "-misc-fixed-*-*-*-*-10-*-*-*-*-*-*-*"
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else fn
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font <- io $ catch (loadQueryFont d fontname)
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(const $ loadQueryFont d "-misc-fixed-*-*-*-*-10-*-*-*-*-*-*-*")
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io $ setFont d gc (fontFromFontStruct font)
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f d w gc font
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io $ freeGC d gc
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io $ freeFont d font
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