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Add Cairo example from haskell-gi.

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Robbie Gleichman 2020-07-05 14:20:58 -07:00
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glance.cabal
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@ -67,11 +67,17 @@ executable glance-gui
-Widentities
-Wpartial-fields
build-depends: base
, gi-glib
, gi-gtk
, gi-gdk
, gi-cairo
, gi-gdkpixbuf
, cairo
, haskell-gi-base
, gi-gio
, text
, transformers
, old-time
default-language: Haskell2010
Other-modules: Drag

438
gui/Clock.hs Normal file
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@ -0,0 +1,438 @@
{-# LANGUAGE OverloadedLabels #-}
{-# LANGUAGE OverloadedStrings #-}
-- original author:
-- Mirco "MacSlow" Mueller <macslow@bangang.de>
--
-- created:
-- 10.1.2006 (or so)
--
-- http://www.gnu.org/licenses/licenses.html#GPL
--
-- ported to Haskell (gtk2hs) by:
-- Duncan Coutts <duncan.coutts@worc.ox.ac.uk>
--
-- ported to haskell-gi from the gtk2hs port by:
-- Iñaki García Etxebarria <garetxe@gmail.com>
--
import Control.Monad (when)
import Control.Monad.Trans.Reader (runReaderT)
import Data.Maybe (isJust)
import Data.IORef
import System.Time
import Data.GI.Base
import qualified GI.Cairo as GI.Cairo
import qualified GI.GLib as GLib
import qualified GI.Gdk as Gdk
import qualified GI.GdkPixbuf as GP
import qualified GI.Gtk as Gtk
import Graphics.Rendering.Cairo
import Graphics.Rendering.Cairo.Internal (Render(runRender))
import Graphics.Rendering.Cairo.Types (Cairo(Cairo))
import Foreign.Ptr (castPtr)
drawClockBackground :: Bool -> Int -> Int -> Render ()
drawClockBackground quality width height = do
save
scale (fromIntegral width) (fromIntegral height)
save
setOperator OperatorOver
when quality drawDropShadow
drawClockFace quality
restore
translate 0.5 0.5
scale 0.4 0.4
setSourceRGB 0.16 0.18 0.19
setLineWidth (1.5/60)
setLineCap LineCapRound
setLineJoin LineJoinRound
drawHourMarks
restore
drawClockHands :: Bool -> Int -> Int -> Render ()
drawClockHands quality width height = do
save
scale (fromIntegral width) (fromIntegral height)
translate 0.5 0.5
scale 0.4 0.4
setSourceRGB 0.16 0.18 0.19
setLineWidth (1.5/60)
setLineCap LineCapRound
setLineJoin LineJoinRound
time <- liftIO (getClockTime >>= toCalendarTime)
let hours = fromIntegral (if ctHour time >= 12
then ctHour time - 12
else ctHour time)
minutes = fromIntegral (ctMin time)
seconds = fromIntegral (ctSec time)
drawHourHand quality hours minutes seconds
drawMinuteHand quality minutes seconds
drawSecondHand quality seconds
restore
drawClockForeground :: Bool -> Int -> Int -> Render ()
drawClockForeground quality width height = do
scale (fromIntegral width) (fromIntegral height)
save
translate 0.5 0.5
scale 0.4 0.4
setSourceRGB 0.16 0.18 0.19
setLineWidth (1.5/60)
setLineCap LineCapRound
setLineJoin LineJoinRound
when quality drawInnerShadow
when quality drawReflection
drawFrame quality
restore
drawDropShadow =
withRadialPattern 0.55 0.55 0.25 0.5 0.5 0.525 $ \pattern -> do
patternAddColorStopRGBA pattern 0 0 0 0 0.811
patternAddColorStopRGBA pattern 0.64 0.345 0.345 0.345 0.317
patternAddColorStopRGBA pattern 0.84 0.713 0.713 0.713 0.137
patternAddColorStopRGBA pattern 1 1 1 1 0
patternSetFilter pattern FilterFast
setSource pattern
arc 0.5 0.5 (142/150) 0 (pi*2)
fill
drawClockFace True =
withLinearPattern 0.5 0 0.5 1 $ \pattern -> do
patternAddColorStopRGB pattern 0 0.91 0.96 0.93
patternAddColorStopRGB pattern 1 0.65 0.68 0.68
patternSetFilter pattern FilterFast
setSource pattern
translate 0.5 0.5
arc 0 0 (60/150) 0 (pi*2)
fill
drawClockFace False = do
setSourceRGB 0.78 0.82 0.805
translate 0.5 0.5
arc 0 0 (60/150) 0 (pi*2)
fill
drawHourMarks = do
save
forM_ ([1..12] :: [Integer]) $ \_ -> do
rotate (pi/6)
moveTo (4.5/6) 0
lineTo (5.0/6) 0
stroke
restore
forM_ = flip mapM_
drawHourHand quality hours minutes seconds = do
save
rotate (-pi/2)
setLineCap LineCapSquare
setLineJoin LineJoinMiter
rotate ( (pi/6) * hours
+ (pi/360) * minutes
+ (pi/21600) * seconds)
-- hour hand's shadow
when quality $ do
setLineWidth (1.75/60)
setOperator OperatorAtop
setSourceRGBA 0.16 0.18 0.19 0.125
moveTo (-2/15 + 0.025) 0.025
lineTo (7/15 + 0.025) 0.025
stroke
-- the hand itself
setLineWidth (1/60)
setOperator OperatorOver
setSourceRGB 0.16 0.18 0.19
moveTo (-2/15) 0
lineTo (7/15) 0
stroke
restore
drawMinuteHand quality minutes seconds = do
save
rotate (-pi/2)
setLineCap LineCapSquare
setLineJoin LineJoinMiter
rotate ( (pi/30) * minutes
+ (pi/1800) * seconds)
-- minute hand's shadow
when quality $ do
setLineWidth (1.75/60)
setOperator OperatorAtop
setSourceRGBA 0.16 0.18 0.19 0.125
moveTo (-16/75 - 0.025) (-0.025)
lineTo (2/3 - 0.025) (-0.025)
stroke
-- the minute hand itself
setLineWidth (1/60)
setOperator OperatorOver
setSourceRGB 0.16 0.18 0.19
moveTo (-16/75) 0
lineTo (2/3) 0
stroke
restore
drawSecondHand quality seconds = do
save
rotate (-pi/2)
setLineCap LineCapSquare
setLineJoin LineJoinMiter
rotate (seconds * pi/30);
-- shadow of second hand-part
when quality $ do
setOperator OperatorAtop
setSourceRGBA 0.16 0.18 0.19 0.125
setLineWidth (1.3125 / 60)
moveTo (-1.5/5 + 0.025) 0.025
lineTo (3/5 + 0.025) 0.025
stroke
-- second hand
setOperator OperatorOver
setSourceRGB 0.39 0.58 0.77
setLineWidth (0.75/60)
moveTo (-1.5/5) 0
lineTo (3/5) 0
stroke
arc 0 0 (1/20) 0 (pi*2)
fill
arc (63/100) 0 (1/35) 0 (pi*2)
stroke
setLineWidth (1/100)
moveTo (10/15) 0
lineTo (12/15) 0
stroke
setSourceRGB 0.31 0.31 0.31
arc 0 0 (1/25) 0 (pi*2)
fill
restore
drawInnerShadow = do
save
setOperator OperatorOver
arc 0 0 (142/150) 0 (pi*2)
clip
withRadialPattern 0.3 0.3 0.1 0 0 0.95 $ \pattern -> do
patternAddColorStopRGBA pattern 0 1 1 1 0
patternAddColorStopRGBA pattern 0.64 0.713 0.713 0.713 0.137
patternAddColorStopRGBA pattern 0.84 0.345 0.345 0.345 0.317
patternAddColorStopRGBA pattern 1 0 0 0 0.811
patternSetFilter pattern FilterFast
setSource pattern
arc 0 0 (142/150) 0 (pi*2)
fill
restore
drawReflection = do
save
arc 0 0 (142/150) 0 (pi*2)
clip
rotate (-75 * pi/180)
setSourceRGBA 0.87 0.9 0.95 0.25
moveTo (-1) (-1)
lineTo 1 (-1)
lineTo 1 1
curveTo 1 0.15 (-0.15) (-1) (-1) (-1)
fill
moveTo (-1) (-1)
lineTo (-1) 1
lineTo 1 1
curveTo (-0.5) 1 (-1) 0.5 (-1) (-1)
fill
restore
drawFrame True = do
save
withRadialPattern (-0.1) (-0.1) 0.8 0 0 1.5 $ \pattern -> do
patternAddColorStopRGB pattern 0 0.4 0.4 0.4
patternAddColorStopRGB pattern 0.2 0.95 0.95 0.95
patternSetFilter pattern FilterFast
setSource pattern
setLineWidth (10/75)
arc 0 0 (142/150) 0 (pi*2)
stroke
withRadialPattern (-0.1) (-0.1) 0.8 0 0 1.5 $ \pattern -> do
patternAddColorStopRGB pattern 0 0.9 0.9 0.9
patternAddColorStopRGB pattern 0.2 0.35 0.35 0.35
patternSetFilter pattern FilterFast
setSource pattern
setLineWidth (10/75)
arc 0 0 (150/150) 0 (pi*2)
stroke
restore
drawFrame False = do
save
setSourceRGB 0 0 0
setLineWidth (10/75)
arc 0 0 1 0 (pi*2)
stroke
restore
initialSize :: Int
initialSize = 256
-- | This function bridges gi-cairo with the hand-written cairo
-- package. It takes a `GI.Cairo.Context` (as it appears in gi-cairo),
-- and a `Render` action (as in the cairo lib), and renders the
-- `Render` action into the given context.
renderWithContext :: GI.Cairo.Context -> Render () -> IO ()
renderWithContext ct r = withManagedPtr ct $ \p ->
runReaderT (runRender r) (Cairo (castPtr p))
main :: IO ()
main = do
_ <- Gtk.init Nothing
window <- new Gtk.Window
[ #decorated := False
, #resizable := True
, #windowPosition := Gtk.WindowPositionCenterAlways
, #appPaintable := True
, #icon :=> GP.pixbufNewFromFile "cairo-clock-icon.png"
, #title := "Haskell-gi Cairo Clock"
, #defaultWidth := fromIntegral initialSize
, #defaultHeight := fromIntegral initialSize
]
geometry <- new Gdk.Geometry [ #minWidth := 32
, #minHeight := 32
, #maxWidth := 512
, #maxHeight := 512 ]
#setGeometryHints window (Just window) (Just geometry)
[Gdk.WindowHintsMinSize, Gdk.WindowHintsMaxSize]
screen <- window `get` #screen
visual <- #getRgbaVisual screen
#setVisual window visual
on window #keyPressEvent $ \event -> do
name <- event `get` #keyval >>= Gdk.keyvalName
when (name == Just "Escape") Gtk.mainQuit
return False
on window #buttonPressEvent $ \event -> do
button <- event `get` #button
time <- event `get` #time
x <- event `get` #xRoot
y <- event `get` #yRoot
case button of
1 -> do
#beginMoveDrag window 1 (round x) (round y) time
return True
3 -> do
#beginResizeDrag window Gdk.WindowEdgeSouthEast 3
(round x) (round y) time
return True
_ -> return False
GLib.timeoutAdd GLib.PRIORITY_DEFAULT 1000
(#queueDraw window >> return True)
backgroundRef <- newIORef (Just undefined)
foregroundRef <- newIORef (Just undefined)
let redrawStaticLayers = do
(width32, height32) <- #getSize window
let (width, height) = (fromIntegral width32, fromIntegral height32)
background <- createImageSurface FormatARGB32 width height
foreground <- createImageSurface FormatARGB32 width height
let clear = do
save
setOperator OperatorClear
paint
restore
renderWith background $ do
clear
drawClockBackground True width height
renderWith foreground $ do
clear
drawClockForeground True width height
writeIORef backgroundRef (Just background)
writeIORef foregroundRef (Just foreground)
on window #realize redrawStaticLayers
sizeRef <- newIORef (initialSize, initialSize)
timeoutHandlerRef <- newIORef Nothing
on window #configureEvent $ \event -> do
w <- fromIntegral <$> event `get` #width
h <- fromIntegral <$> event `get` #height
size <- readIORef sizeRef
writeIORef sizeRef (w,h)
when (size /= (w,h)) $ do
background <- readIORef backgroundRef
foreground <- readIORef foregroundRef
maybe (return ()) surfaceFinish background
maybe (return ()) surfaceFinish foreground
writeIORef backgroundRef Nothing
writeIORef foregroundRef Nothing
timeoutHandler <- readIORef timeoutHandlerRef
_ <- maybe (return True) GLib.sourceRemove timeoutHandler
handler <- GLib.timeoutAdd GLib.PRIORITY_DEFAULT_IDLE 300
(do
writeIORef timeoutHandlerRef Nothing
redrawStaticLayers
#queueDraw window
return False
)
writeIORef timeoutHandlerRef (Just handler)
return False
on window #draw $ \context -> do
width <- fromIntegral <$> #getAllocatedWidth window
height <- fromIntegral <$> #getAllocatedHeight window
background <- readIORef backgroundRef
foreground <- readIORef foregroundRef
renderWithContext context $ do
save
setOperator OperatorSource
setSourceRGBA 0 0 0 0
paint
restore
case background of
Nothing -> drawClockBackground False width height
Just background -> do
setSourceSurface background 0 0
paint
drawClockHands (isJust background) width height
case foreground of
Nothing -> drawClockForeground False width height
Just foreground -> do
setSourceSurface foreground 0 0
paint
return True
#showAll window
Gtk.main

470
gui/LICENSE Normal file
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@ -0,0 +1,470 @@
The haskell-gi library and included works are provided under the terms of the
GNU Library General Public License (LGPL) version 2.1 with the following
exception:
Static linking of applications or any other source to the haskell-gi library
does not constitute a modified or derivative work and does not require the
author(s) to provide source code for said work, to link against the shared
haskell-gi libraries, or to link their applications against a user-supplied
version of haskell-gi. If you link applications to a modified version of
haskell-gi, then the changes to haskell-gi must be provided under the terms of
the LGPL.
----------------------------------------------------------------------------
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Version 2.1, February 1999
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2
stack.yaml
View File

@ -12,6 +12,8 @@ extra-deps: [
"diagrams-graphviz-1.4.1.1"
, "gi-gtk-declarative-0.6.3"
, "gi-gtk-declarative-app-simple-0.6.3"
, "cairo-0.13.8.1"
, "gtk2hs-buildtools-0.13.8.0"
]
# Override default flag values for local packages and extra-deps