Use Cairo for background rendering

lib/Phi/Widgets/Clock.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE DeriveDataTypeable, TypeFamilies #-}
+{-# LANGUAGE TypeFamilies, DeriveDataTypeable #-}
 
 module Phi.Widgets.Clock ( ClockConfig(..)
                          , defaultClockConfig
@@ -36,21 +36,28 @@ defaultClockConfig = ClockConfig "%R" (0, 0, 0, 1) 0 50
 
 data Clock = Clock ClockConfig deriving Show
 
+data ClockState = ClockState ZonedTime deriving Show
+
+data ClockMessage = UpdateTime ZonedTime deriving (Show, Typeable)
+
 instance WidgetClass Clock where
-  type WidgetData Clock = ()
+  type WidgetData Clock = ClockState
   
   initWidget (Clock _) phi _ = do
     forkIO $ forever $ do
       time <- getZonedTime
+      sendMessage phi $ UpdateTime time
       sendMessage phi Repaint
       
       threadDelay $ ceiling $ 1000000*(max 1 $ 60 - (todSec . localTimeOfDay . zonedTimeToLocalTime $ time))
-    return ()
+    
+    time <- getZonedTime
+    return $ ClockState time
 
     
   minSize (Clock config ) = clockSize config
   
-  render (Clock config) _ w h = do
+  render (Clock config) (ClockState time) w h = do
     time <- liftIO getZonedTime
     let (r, g, b, a) = fontColor config
         str = formatTime defaultTimeLocale (clockFormat config) time
@@ -72,6 +79,11 @@ instance WidgetClass Clock where
     
     moveTo (((fromIntegral w)/scalef - textWidth')/2) (((fromIntegral h)/scalef - textHeight')/2)
     showLayout layout
+  
+  handleMessage _ priv m = case (fromMessage m) of
+    Just (UpdateTime time) -> ClockState time
+    _ -> priv
+
 
 clock :: ClockConfig -> Widget
 clock config = do

lib/Phi/Widgets/Taskbar.hs

@@ -0,0 +1,55 @@
+{-# LANGUAGE TypeFamilies #-}
+
+module Phi.Widgets.Taskbar ( TaskbarConfig(..)
+                           , defaultTaskbarConfig
+                           , taskbar
+                           ) where
+
+import Control.Concurrent
+import Control.Monad
+
+import Data.Typeable
+import Data.Time.LocalTime
+import Data.Time.Format
+
+import Graphics.Rendering.Cairo
+
+import Graphics.Rendering.Pango.Cairo
+import Graphics.Rendering.Pango.Enums (PangoRectangle(..))
+import Graphics.Rendering.Pango.Layout
+
+import System.Locale
+
+import Phi.Phi
+import Phi.Types
+import Phi.Widget
+
+
+data TaskbarConfig = TaskbarConfig deriving Show
+
+defaultTaskbarConfig :: TaskbarConfig
+defaultTaskbarConfig = TaskbarConfig
+
+data Taskbar = Taskbar TaskbarConfig deriving Show
+
+data TaskbarState = TaskbarState deriving Show
+
+instance WidgetClass Taskbar where
+  type WidgetData Taskbar = TaskbarState
+  
+  initWidget (Taskbar _) phi dispvar = do
+    --withMVar dispvar $ \disp ->
+      
+    --  return ()
+    return TaskbarState
+
+    
+  minSize _ = 0
+  weight _ = 1
+  
+  render (Taskbar config) _ w h = do
+    return ()
+
+taskbar :: TaskbarConfig -> Widget
+taskbar config = do
+  Widget $ Taskbar config