From 9d1415a2d35a10be828fac5c9534ba477233aa49 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Mon, 18 Jul 2011 18:06:00 +0200
Subject: Added AlphaBox widget

---
 lib/Phi/Widgets/AlphaBox.hs | 49 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 lib/Phi/Widgets/AlphaBox.hs

(limited to 'lib/Phi/Widgets')

diff --git a/lib/Phi/Widgets/AlphaBox.hs b/lib/Phi/Widgets/AlphaBox.hs
new file mode 100644
index 0000000..3ed31d0
--- /dev/null
+++ b/lib/Phi/Widgets/AlphaBox.hs
@@ -0,0 +1,49 @@
+{-# LANGUAGE TypeFamilies #-}
+
+module Phi.Widgets.AlphaBox ( alphaBox
+                            ) where
+
+import Phi.Types
+import Phi.Widget
+
+import Control.Monad
+
+import Graphics.Rendering.Cairo
+
+
+data AlphaBoxState = AlphaBoxState [WidgetState] deriving Show
+
+data AlphaBox = AlphaBox Double [Widget] deriving Show
+
+
+instance WidgetClass AlphaBox where
+  type WidgetData AlphaBox = AlphaBoxState
+  initWidget (AlphaBox _ widgets) phi disp = liftM AlphaBoxState $ mapM (createWidgetState phi disp) widgets
+  
+  minSize (AlphaBox _ _) (AlphaBoxState widgetStates) height =
+    sum (map (\(WidgetState {stateWidget = w, statePrivateData = priv}) -> minSize w priv height) widgetStates)
+  
+  weight (AlphaBox _ widgets) = sum (map (\(Widget w) -> weight w) widgets)
+  
+  layout (AlphaBox _ _) (AlphaBoxState widgetStates) width height = AlphaBoxState $ layoutWidgets widgetStates 0 0 width height
+
+  render (AlphaBox alpha _) (AlphaBoxState widgetStates) w h screen = do
+    renderWithSimilarSurface ContentColorAlpha w h $ \surface -> do
+      renderWith surface $ do
+        renderWidgets widgetStates screen
+        
+        setOperator OperatorDestIn
+        setSourceRGBA 0 0 0 alpha
+        paint
+      
+      withPatternForSurface surface setSource
+      paint
+        
+        
+    
+  handleMessage _ (AlphaBoxState widgetStates) m = AlphaBoxState $ handleMessageWidgets m widgetStates
+
+
+alphaBox :: Double -> [Widget] -> Widget
+alphaBox alpha = Widget . AlphaBox alpha
+
-- 
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