blob: eacda5ae1e8867a48e09681d4cf331fa378d8280 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
{-# LANGUAGE MultiParamTypeClasses, StandaloneDeriving, ExistentialQuantification, FlexibleInstances #-}
module Phi.Widgets.AlphaBox ( AlphaBox
, alphaBox
) where
import Phi.Types
import Phi.Widget
import Control.Monad
import Graphics.Rendering.Cairo
data AlphaBox w d = (Widget w d) => AlphaBox !Double !w
deriving instance Show (AlphaBox w d)
deriving instance Eq (AlphaBox w d)
instance Eq d => Widget (AlphaBox w d) d where
initWidget (AlphaBox _ w) = initWidget w
minSize (AlphaBox _ w) = minSize w
weight (AlphaBox _ w) = weight w
layout (AlphaBox _ w) = layout w
render (AlphaBox alpha w) d x y width height screen = do
renderWithSimilarSurface ContentColorAlpha width height $ \surface -> do
renderWith surface $ do
render w d x y width height screen
setOperator OperatorDestIn
setSourceRGBA 0 0 0 alpha
paint
withPatternForSurface surface setSource
paint
handleMessage (AlphaBox _ w) = handleMessage w
alphaBox :: (Widget w d) => Double -> w -> AlphaBox w d
alphaBox = AlphaBox
|