happlets-lib-gtk (empty) → 0.1.0.0
raw patch · 4 files changed
+2172/−0 lines, 4 filesdep +basedep +cairodep +diagrams-cairo
Dependencies added: base, cairo, diagrams-cairo, diagrams-core, diagrams-lib, glib, gtk, happlets, lens, linear, mtl, pango, semigroups, text, time
Files
- LICENSE +674/−0
- happlets-lib-gtk.cabal +163/−0
- src/Happlets/Lib/Gtk.hs +1186/−0
- src/Happlets/Lib/Gtk/TestSuite.hs +149/−0
+ LICENSE view
@@ -0,0 +1,674 @@+ GNU GENERAL PUBLIC LICENSE+ Version 3, 29 June 2007++ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>+ Everyone is permitted to copy and distribute verbatim copies+ of this license document, but changing it is not allowed.++ Preamble++ The GNU General Public License is a free, copyleft license for+software and other kinds of works.++ The licenses for most software and other practical works are designed+to take away your freedom to share and change the works. By contrast,+the GNU General Public License is intended to guarantee your freedom to+share and change all versions of a program--to make sure it remains free+software for all its users. We, the Free Software Foundation, use the+GNU General Public License for most of our software; it applies also to+any other work released this way by its authors. You can apply it to+your programs, too.++ When we speak of free software, we are referring to freedom, not+price. 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+ happlets-lib-gtk.cabal view
@@ -0,0 +1,163 @@+-- "happlets-lib-gtk.cabal" build configuration for this project.+--+-- Copyright (C) 2017-2018 Ramin Honary.+--+-- "happlets-gtk" is free software: you can redistribute it and/or modify+-- it under the terms of the GNU Affero General Public License (AGPL) as+-- published by the Free Software Foundation.+--+-- "happlets-lib-gtk" is distributed in the hope that it will be useful,+-- but WITHOUT ANY WARRANTY; without even the implied warranty of+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.+-- See the GNU Affero General Public License for more details.+--+-- You should have received a copy of the GNU General Public License+-- along with this program (see the file called "LICENSE"). If not, see+-- <http://www.gnu.org/licenses/agpl.html>.++NAME: happlets-lib-gtk+VERSION: 0.1.0.0+AUTHOR: Ramin Honary+COPYRIGHT: (C) 2017-2018 Ramin Honary, all rights reserved.+MAINTAINER: RaminHAL9001@gmail.com+HOMEPAGE: https://github.com/RaminHAL9001/happlets-lib-gtk+LICENSE: AGPL+LICENSE-FILE: LICENSE+BUILD-TYPE: Simple+CABAL-VERSION: >= 1.18++CATEGORY: GUI, Game+SYNOPSIS: The "Haskell Applets" Gtk+ ver. 2 back-end for "happlets".++DESCRIPTION: + .+ *WARNING:* There are still some known bugs in this package, it is being+ uploaded to Hackage for evaluation purposes only. Although it is being+ actively developed, there is no release schedule for a production-ready+ version of this package. Contributions to the repository on GitHub are+ welcome.+ .+ This packages provides the Gtk+ v2 back-end to the "happlets" GUI+ framework. To create a Gtk+ applet, import the "Happlets.Lib.Gtk"+ module. "Happlets.Lib.Gtk" re-exports the "Happlets" module, so you can+ use all of the primitives provided by the "Happlets" module to construct+ your applet. In your "main" function, launch the main event loop by+ passing the 'Happlets.Lib.Gtk.gtkHapplet' function as the "Provider"+ either to the 'Happlets.Initialize.happlet' function or to the+ 'Happlets.Initialize.simpleHapplet' function.+ .+ For an example of how to program your own Happlet, run the "cabal+ configure" command with the "--enable-tests" flag set. This will build+ the "Happlets.Lib.Gtk.TestSuite" executable program. Refer to the source+ code for "TestSuite" to see how the application is structured.+ .+ The goal of the Happlets project is to allow you to create very simple,+ thread-safe applications that contain nothing more than a single window+ with a drawing canvas that can respond to user input events, like mouse+ clicks, key-presses, or frame animation events. The intention is to+ create a minimal programming platform for small, single-purpose+ graphical applications which simply displays some interactive graphic,+ for example a plot of some data, or a simple game. Naturally, the+ Happlet program can be arbitrarily complex, but it may be better to+ consider other, FRP-based solutions if managing events becomes too+ difficult.+ .++Library {++ HS-SOURCE-DIRS: src+ DEFAULT-LANGUAGE: Haskell2010++ GHC-OPTIONS: -Wall+ -fno-warn-name-shadowing+ -fno-warn-unused-do-bind++ EXPOSED-MODULES:+ Happlets.Lib.Gtk++ BUILD-DEPENDS:+ cairo >=0.13.3.0 && <0.14.0.0,+ diagrams-cairo >=1.4 && <2.0,+ diagrams-core >=1.4 && <2.0,+ diagrams-lib >=1.4.0.0 && <2.0.0.0,+ glib >=0.12.0.0 && <0.14.0.0,+ gtk >=0.13.0 && <0.15.0,+ happlets >=0.1.0.0 && <1.0.0.0,+ lens >=4.0.0.0 && <5.0.0.0,+ linear >=1.20.0 && <2.0.0.0,+ mtl >=2.2.0 && <=2.2.1,+ pango >=0.13.4.0 && <0.14.0.0,+ semigroups >=0.16.0 && <0.19.0,+ text >=1.1.1.4 && <=2.0.0.0,+ time >=1.4.0.0 && <=1.6.0.0,+ base >=4.7 && <4.9++ DEFAULT-EXTENSIONS:+ DeriveDataTypeable+ DeriveFunctor+ ExistentialQuantification+ FlexibleContexts+ FlexibleInstances+ FunctionalDependencies+ GeneralizedNewtypeDeriving+ ImplicitParams+ LambdaCase+ MultiParamTypeClasses+ OverloadedStrings+ RankNTypes+ ScopedTypeVariables+ StandaloneDeriving+}++Test-suite happlets-lib-gtk-test {++ TYPE: exitcode-stdio-1.0+ MAIN-IS: Happlets/Lib/Gtk/TestSuite.hs+ HS-SOURCE-DIRS: src+ DEFAULT-LANGUAGE: Haskell2010++ GHC-OPTIONS: -threaded -Wall+ -fno-warn-name-shadowing+ -fno-warn-unused-do-bind+ -main-is Happlets.Lib.Gtk.TestSuite++ OTHER-MODULES:+ Happlets.Lib.Gtk++ BUILD-DEPENDS:+-- bytestring >=0.10.0.0 && <1.0.0.0,+ cairo >=0.13.3.0 && <0.14.0.0,+-- colour >=2.0.0 && <3.0.0,+-- containers >=0.5.5.0 && <=0.5.7.0,+ diagrams-cairo >=1.4 && <2.0,+ diagrams-core >=1.4 && <2.0,+ diagrams-lib >=1.4.0.0 && <2.0.0.0,+ glib >=0.12.0.0 && <0.14.0.0,+ gtk >=0.13.0 && <0.15.0,+ happlets >=0.1.0.0 && <1.0.0.0,+ lens >=4.0.0.0 && <5.0.0.0,+ linear >=1.20.0 && <2.0.0.0,+ mtl >=2.2.0 && <=2.2.1,+ semigroups >=0.16.0 && <0.19.0,+ text >=1.1.1.4 && <=2.0.0.0,+ time >=1.4.0.0 && <=1.6.0.0,+-- transformers >=0.3.0.0 && <=0.4.3.0,+-- unix >=2.7.0.0 && <=2.8.0.0,+ base >=4.7 && <4.9++ DEFAULT-EXTENSIONS:+ DeriveDataTypeable+ DeriveFunctor+ ExistentialQuantification+ FlexibleContexts+ FlexibleInstances+ FunctionalDependencies+ GeneralizedNewtypeDeriving+ ImplicitParams+ LambdaCase+ MultiParamTypeClasses+ OverloadedStrings+ RankNTypes+ ScopedTypeVariables+ StandaloneDeriving+}
+ src/Happlets/Lib/Gtk.hs view
@@ -0,0 +1,1186 @@+-- | This is the Gtk+ version 2 back-end for Happlets, and will also serve as the Happlet referecne+-- implementation. Creating a window automatically calls the the Gtk+ initializer. Use+-- 'newGtkWindow' to create a new window, and any of the "Happlet.World" functinos to manipulate the+-- windows. This module re-exports the "Happlets" module so it is not necessary to import both.+module Happlets.Lib.Gtk+ ( gtkHapplet, GtkGUI, GtkRedraw,+ GtkWindow, gtkLaunchEventLoop,+ GtkImage, CairoRender(..), GtkCairoDiagram, gtkCairoDiagram,+ cairoClearCanvas, cairoSetColorRGBA32,+ gtkAnimationFrameRate,+ module Happlets,+ module Happlets.Draw+ )+ where++----------------------------------------------------------------------------------------------------++import Happlets+import Happlets.Draw+import Happlets.Provider++import Control.Arrow+import Control.Concurrent+--import Control.Lens+--import Control.Monad+--import Control.Monad.Reader+import Control.Monad.State++import Data.IORef+import Data.Maybe+import Data.Semigroup+import qualified Data.Text as Strict+import Data.Time.Clock+--import Data.Typeable+import Data.Word++import qualified Graphics.Rendering.Cairo as Cairo++--import qualified Graphics.UI.Gtk.Abstract.Container as Gtk+import qualified Graphics.UI.Gtk.Abstract.Widget as Gtk+import qualified Graphics.UI.Gtk.Cairo as Gtk+--import qualified Graphics.UI.Gtk.Display.Image as Gtk+--import qualified Graphics.UI.Gtk.Gdk.GtkWindowState as Gtk+import qualified Graphics.UI.Gtk.Gdk.Drawable as Gtk+import qualified Graphics.UI.Gtk.Gdk.DrawWindow as Gtk+import qualified Graphics.UI.Gtk.Gdk.EventM as Gtk+--import qualified Graphics.UI.Gtk.Gdk.Keys as Gtk+import qualified Graphics.UI.Gtk.Gdk.GC as Gtk+import qualified Graphics.UI.Gtk.Gdk.Pixmap as Gtk+import qualified Graphics.UI.Gtk.Gdk.Region as Gtk+import qualified Graphics.UI.Gtk.Gdk.Screen as Gtk+import qualified Graphics.UI.Gtk.General.General as Gtk+--import qualified Graphics.UI.Gtk.Layout.Alignment as Gtk+import qualified Graphics.UI.Gtk.Windows.Window as Gtk++import Diagrams.Backend.Cairo.Internal+import Diagrams.BoundingBox+import Diagrams.Core.Compile+import Diagrams.Core.Types+import Diagrams.Size (dims)++import Linear.Affine+import Linear.V2 (V2(..))++import System.IO+import System.IO.Unsafe++--import System.Glib.Attributes (AttrOp(..))+--import qualified System.Glib.Attributes as Glib+import qualified System.Glib.Signals as Glib+import qualified System.Glib.Utils as Glib+import qualified System.Glib.MainLoop as Glib++import Debug.Trace++----------------------------------------------------------------------------------------------------++debugThisModule :: Bool+debugThisModule = True++type LogGUI = String -> IO ()++mkLogger+ :: (Monad m, MonadIO m)+ => String -> Bool -> m LogGUI+mkLogger func enable = return $ if not (debugThisModule && enable)+ then const $ return ()+ else \ msg -> do+ tid <- myThreadId+ traceIO $ '[' : show tid ++ "][Happlets.Lib.Gtk." ++ func ++ "] " ++ msg++----------------------------------------------------------------------------------------------------++dToW16 :: Double -> Word16+dToW16 = round . (*) (realToFrac (maxBound::Word16))++dToGrey :: Double -> Gtk.Color+dToGrey d = Gtk.Color (dToW16 d) (dToW16 d) (dToW16 d)++-- | This is the frame rate used by default when installing an animation event handler. This value+-- can be configured by modifying the 'Happlets.Config.animationFrameRate'.+gtkAnimationFrameRate :: Double+gtkAnimationFrameRate = 60.0++----------------------------------------------------------------------------------------------------++-- | This data type acts as a handle to a Gtk+ environment, which contains pointers to the window+-- and graphpics contexts which you can manipulate by inserting or removing your own Happlets to be+-- displayed within it.+data GtkWindow+ = GtkUnlockedWin !(MVar GtkWindowState)+ -- ^ This is the constructor used by public-facing APIs. The 'Happlets.Initialize.newWindow'+ -- 'Happlets.Initialize.deleteWindow', and 'Happlets.Initialize.attachWindow' functions all+ -- return or pass this constructor around.+ | GtkLockedWin !(GtkWindowState)+ -- ^ This is the constructor use internally, particularly when evaluating the 'Happlets.GUI.GUI'+ -- monad. When evaluation completes, it is stored back into the MVar for 'GtkUnlockedWin' and the+ -- 'GtkUnlockedWin' is returned instead.++-- | A monadic wrapper around a 'Cario.Render' monad. The only reason for this to exist is because+-- there needs to be an instance of 'Data.Semigroup.Semigroup'.+--+-- The 'Controller' type is defined to use the 'CairoRender' as it's @view@ type. You can also+-- convert a 'GtkCairoDiagram' to a 'CairoRender' using the 'gtkCairoDiagram' function.+newtype CairoRender a = CairoRender { runCairoRender :: Cairo.Render a }+ deriving (Functor, Applicative, Monad, MonadIO)++instance Semigroup a => Semigroup (CairoRender a) where+ (CairoRender a) <> (CairoRender b) = CairoRender $ (<>) <$> a <*> b++instance Monoid a => Monoid (CairoRender a) where+ mappend (CairoRender a) (CairoRender b) = CairoRender $ mappend <$> a <*> b+ mempty = return mempty++-- | Contains parameters that can exist /after/ the 'Gtk.Window' has been allocated. These+-- parameters are stored in an 'MVar' which is initialized in an empty state until the Gtk+ window+-- is actually made visible (when it recieves the first "configure" event). The reason for this is+-- that many of the 'Happlets.GUI.GUI' functions may try to evaluate a redraw before the window+-- exists and the DrawWIndow has been allocated.+data GtkWindowLive+ = GtkWindowLive+ { gtkDrawWindow :: !Gtk.DrawWindow+ , theGtkPixmap :: !Gtk.Pixmap+ -- ^ This is the 'Gtk.Pixmap' that contains the buffer of the image that is displayed in the+ -- Happlet window. Every time the window is resized, this object is re-allocated, so it is+ -- important that this value be accessible in only one location, do not store a copy of it+ -- into an MVar or IORef which other threads may write to arbitrarily, unless you like the+ -- image to be garbled.+ , theGtkGraphCtx :: !Gtk.GC+ -- ^ This is the old-fashioned GUI graphics context, which keeps track of things like+ -- foreground color, background color, clip region, and pen location. This is used for Gdk+ -- (not Gtk+) drawing primitives. As far as I know, this data structure is deprecated and does+ -- not even exist in Gtk+ version 3, but it is still the only way to perform certain+ -- graphics operations in Gtk+ version 2.+ }++data GtkWindowState+ = GtkWindowState+ { currentConfig :: !Config+ , thisWindow :: !(MVar GtkWindowState)+ , gtkWindowLive :: !(MVar GtkWindowLive)+ , gtkWindow :: !Gtk.Window+ , theInitReaction :: !(ConnectReact PixSize)+ , theResizeReaction :: !(ConnectReact PixCoord)+ , theVisibilityReaction :: !(ConnectReact Bool)+ , theFocusReaction :: !(ConnectReact Bool)+ , theMouseHandler :: !(ConnectReact Mouse)+ , theCursorHandler :: !(ConnectReact Mouse)+ , theKeyHandler :: !(ConnectReact Keyboard)+ , theAnimatorThread :: !(ConnectReact AnimationMoment)+ }++data ConnectReact event+ = Disconnected+ | ConnectReact{ doDisconnect :: GtkState (), doReact :: event -> GtkState Bool }++evalConnectReact :: ConnectReact event -> event -> GtkState Bool+evalConnectReact = \ case+ Disconnected -> const $ return False+ ConnectReact{doReact=f} -> f++forceDisconnect :: Lens' GtkWindowState (ConnectReact event) -> GtkState ()+forceDisconnect connection = use connection >>= \ case+ ConnectReact{doDisconnect=discon} -> discon >> connection .= Disconnected+ Disconnected -> return ()++--gtkPixmap :: Lens' GtkWindowLive Gtk.Pixmap+--gtkPixmap = lens theGtkPixmap $ \ a b -> a{ theGtkPixmap = b }++--gtkGraphCtx :: Lens' GtkWindowLive Gtk.GC+--gtkGraphCtx = lens theGtkGraphCtx $ \ a b -> a{ theGtkGraphCtx = b }++initReaction :: Lens' GtkWindowState (ConnectReact PixSize)+initReaction = lens theInitReaction $ \ a b -> a{ theInitReaction = b }++visibilityReaction :: Lens' GtkWindowState (ConnectReact Bool)+visibilityReaction = lens theVisibilityReaction $ \ a b -> a{ theVisibilityReaction = b }++focusReaction :: Lens' GtkWindowState (ConnectReact Bool)+focusReaction = lens theFocusReaction $ \ a b -> a{ theFocusReaction = b }++resizeReaction :: Lens' GtkWindowState (ConnectReact PixCoord)+resizeReaction = lens theResizeReaction $ \ a b -> a{ theResizeReaction = b }++mouseHandler :: Lens' GtkWindowState (ConnectReact Mouse)+mouseHandler = lens theMouseHandler $ \ a b -> a{ theMouseHandler = b }++cursorHandler :: Lens' GtkWindowState (ConnectReact Mouse)+cursorHandler = lens theCursorHandler $ \ a b -> a{ theCursorHandler = b }++keyHandler :: Lens' GtkWindowState (ConnectReact Keyboard)+keyHandler = lens theKeyHandler $ \ a b -> a{ theKeyHandler = b }++animatorThread :: Lens' GtkWindowState (ConnectReact AnimationMoment)+animatorThread = lens theAnimatorThread $ \ a b -> a{ theAnimatorThread = b }++-- Create an image buffer with an alpha channel for a 'Graphics.UI.Gtk.Abstract.Widget.Widget' to+-- be rendered.+mkAlphaChannel :: LogGUI -> Gtk.Widget -> IO ()+mkAlphaChannel logGUI window = do+ logGUI $ "Gtk.widgetGetScreen"+ screen <- Gtk.widgetGetScreen window+ logGUI $ "Gtk.screenGetRGBAColormap"+ colormap <- Gtk.screenGetRGBAColormap screen+ case colormap of+ Nothing -> do+ logGUI $ "-- Colormap dos NOT support alpha channels"+ return ()+ Just colormap -> do+ logGUI $ "Gtk.widgetSetColorMap"+ Gtk.widgetSetColormap window colormap++--gtkCanvas :: GtkState Gtk.DrawWindow+--gtkCanvas = gets gtkWindowLive >>= liftIO . liftM gtkDrawWindow . readMVar++----------------------------------------------------------------------------------------------------++newtype GtkState a+ = GtkState { unwrapGtkState :: StateT GtkWindowState IO a }+ deriving (Functor)++instance Applicative GtkState where+ pure = return+ (<*>) = ap++instance Monad GtkState where+ return = GtkState . return+ (GtkState a) >>= b = GtkState $ a >>= unwrapGtkState . b++instance MonadState GtkWindowState GtkState where+ state = GtkState . state++instance MonadIO GtkState where+ liftIO = GtkState . liftIO++runGtkState :: GtkState a -> GtkWindowState -> IO (a, GtkWindowState)+runGtkState (GtkState f) = runStateT f++-- | This function acquires a lock on the 'GtkState' and begins evaluating the 'GtkState'+-- function. This function should be evaluated at the top level of the procedure that is evaluated+-- by an event handler.+lockGtkWindow :: GtkWindow -> GtkState a -> IO a+lockGtkWindow win f = case win of+ GtkLockedWin{} -> error "lockGtkWindow: evaluated on an already locked 'GtkLockedWin' window."+ GtkUnlockedWin mvar -> modifyMVar mvar $ liftM (\ (a, b) -> (b, a)) . runGtkState f++-- | This function evaluates 'Happlets.GUI.GUI' functions within event handlers. It evaluates to a+-- 'GtkState' function, which means you are required to have first evaluated 'unlockGtkWindow'. This+-- function will then lock the 'Happlets.GUI.Happlet' and then evaluate the 'Happlets.GUI.GUI'+-- function.+gtkRunHapplet+ :: Happlet model -> (GUIContinue -> GtkState ()) -> GtkGUI model void -> GtkState Bool+gtkRunHapplet happ cont f = do+ logGUI <- mkLogger "gtkRunHapplet" True+ env <- get+ liftIO $ logGUI $ "locking Happlet, evaluating GUI function..."+ ((env, keep), _) <- liftIO $ onHapplet happ $ \ model -> do+ logGUI "evalGUI"+ gui <- evalGUI f happ (GtkLockedWin env) model+ let model = theGUIModel gui+ case theGUIWindow gui of+ GtkUnlockedWin{} -> error+ "gtkRunHapplet: evalGUI evaluated on GtkLockedWin but returned GtkUnlockedWin"+ GtkLockedWin env -> do+ logGUI "runGtkState -- evaluate continuation"+ ((), env) <- runGtkState (cont $ theGUIContinue gui) env+ return ((env, guiIsLive gui), model)+ state $ const (keep, env)++-- | This function is intended to be passed as a parameter to 'gtkRunHapplet' by event handling+-- functions which check if the 'Happlets.GUI.GUI' function evaluated to 'Happlets.GUI.disable'.+checkGUIContinue+ :: LogGUI+ -> Lens' GtkWindowState (ConnectReact event)+ -> GUIContinue+ -> GtkState ()+checkGUIContinue logGUI connection = \ case+ GUIHalt -> forceDisconnect connection+ GUIFail msg -> do+ liftIO $ logGUI $ "GUI function evaluated to \"fail\" with message:\n " ++ show msg+ forceDisconnect connection+ GUIContinue -> return ()++-- | This function should be evaluated from within a 'GtkGUI' function when it is necessary to+-- update the 'GtkWindowState', usually this is for installing or removing event handlers.+runGtkStateGUI :: GtkState a -> GtkGUI model a+runGtkStateGUI f = getGUIState >>= \ gui -> case theGUIWindow gui of+ GtkUnlockedWin{} -> error $ "runGtkStateGUI: " +++ "Evaluated a GtkState function within a GtkGUI function on a locked GtkWindow."+ -- The 'window' value passed to the 'evalGUI' function must be a 'GtkLockedWin' constructor.+ GtkLockedWin env -> do+ (a, env) <- liftIO $ runGtkState f env+ putGUIState $ gui{ theGUIWindow = GtkLockedWin env }+ return a++-- | Create the window and install the permanent event handlers.+createWin :: Config -> IO GtkWindowState+createWin cfg = do+ logGUI <- mkLogger "createWin" True+ forM_ (configErrorsOnLoad cfg) (hPrint stderr)+ logGUI $ "Gtk.windowNew"+ window <- Gtk.windowNew+ logGUI $ "Gtk.widgetSetHasWindow"+ Gtk.widgetSetHasWindow window True+ logGUI $ "Gtk.widgetSetAppPaintable"+ Gtk.widgetSetAppPaintable window True+ logGUI $ "Gtk.widgetSetDoubleBuffered window False"+ Gtk.widgetSetDoubleBuffered window False+ when (isJust $ cfg ^. backgroundTransparency) $ mkAlphaChannel logGUI $ Gtk.castToWidget window+ logGUI $ "Gtk.windowSetTypeHint GtkWindowTtypeHintNormal"+ Gtk.windowSetTypeHint window Gtk.WindowTypeHintNormal+ logGUI $ "Gtk.windowSetDefaultSize " ++ show (cfg ^. recommendWindowSize)+ uncurry (Gtk.windowSetDefaultSize window) $ cfg ^. recommendWindowSize+ logGUI $ "Gtk.windowSetDecorated " ++ show (cfg ^. decorateWindow)+ Gtk.windowSetDecorated window $ cfg ^. decorateWindow+ this <- newEmptyMVar+ live <- newEmptyMVar+ let env = GtkWindowState+ { currentConfig = cfg+ , thisWindow = this+ , gtkWindowLive = live+ , gtkWindow = window+ , theInitReaction = Disconnected+ , theResizeReaction = Disconnected+ , theVisibilityReaction = Disconnected+ , theFocusReaction = Disconnected+ , theMouseHandler = Disconnected+ , theCursorHandler = Disconnected+ , theKeyHandler = Disconnected+ , theAnimatorThread = Disconnected+ }+ ((), env) <- flip runGtkState env $ do+ installExposeEventHandler+ installDeleteEventHandler+ installInitEventHandler+ putMVar this env+ return env++-- | Expose event handlers do not evaluate any 'GUI' functions. The expose event handler's only task+-- is to blit the canvas pixmap to the window's image buffer.+--+-- The expose event handler installed here actually will remove itself and install another expose+-- event handler which will be used throughout the remainder of the windows lifetime. The reason+-- this is necessary due to some idiosyncratic behavior of Gtk+, namely that the first time the+-- expose event handler is called, the window's image buffer has not been properly allocated and the+-- event handler that does the blitting will be needing a pointer to an image buffer, so the+-- permanent event handler cannot be installed until the pointer to the image buffer becomes+-- available. +installExposeEventHandler :: GtkState ()+installExposeEventHandler = do+ logGUI <- mkLogger "installExposeEventHandler" True+ env <- get+ liftIO $ do+ logGUI $ "Gtk.widgetAddEvents env [Gtk.StructureMask]"+ Gtk.widgetAddEvents (gtkWindow env) [Gtk.StructureMask, Gtk.ExposureMask]+ --------------------------------------- Expose Event -----------------------------------+ logGUI "Glib.on Gtk.exposeEvent -- for init handler"+ initExposeEventMVar <- newEmptyMVar+ (>>= (putMVar initExposeEventMVar)) $ Glib.on (gtkWindow env) Gtk.exposeEvent $ do+ logGUI <- mkLogger "initExposeEventCallback" True+ liftIO $ do+ logGUI "Gtk.eventWindow >>= putMVar gtkDrawWindowMVar"+ takeMVar initExposeEventMVar >>= Glib.signalDisconnect+ logGUI "Glib.on window Gtk.exposeEvent"+ Glib.on (gtkWindow env) Gtk.exposeEvent $ do+ logGUI <- mkLogger "exposeEventCallback" False+ canvas <- Gtk.eventWindow+ region <- Gtk.eventRegion+ liftIO $ withMVar (gtkWindowLive env) $ \ livest -> do+ Gtk.gcSetClipRegion (theGtkGraphCtx livest) region+ (w, h) <- Gtk.drawableGetSize (theGtkPixmap livest)+ logGUI $ "Gtk.drawRectangle 0 0 " ++ show w ++ ' ' : show h+ Gtk.drawRectangle canvas (theGtkGraphCtx livest) True 0 0 w h+ --liftIO $ gdkBlit canvas (theGtkGraphCtx env) (V2 0 0) region >> return True+ return True+ ------------------------------------------------------------------------------------+ return True++-- | The init event handler was responsible for pulling the init GUI function from the+-- 'GtkWindowState' and evaluating it, then installing a configure event handler. +installInitEventHandler :: GtkState ()+installInitEventHandler = do+ logGUI <- mkLogger "permanentHandlers" True+ env <- get+ liftIO $ do+ ------------------------------------ Initializing Event --------------------------------+ logGUI "Glib.on Gtk.configureEvent -- for init handler"+ initHandler <- newEmptyMVar+ (>>= (putMVar initHandler)) $ Glib.on (gtkWindow env) Gtk.configureEvent $ do+ logGUI <- mkLogger "initCallback" True+ canvas <- Gtk.eventWindow+ size <- Gtk.eventSize+ let allocSize = dimsForAlloc size+ let evt = sampCoord <$> uncurry V2 size+ liftIO $ lockGtkWindow (GtkUnlockedWin $ thisWindow env) $ do+ live <- gets gtkWindowLive+ liftIO $ do+ logGUI $ "newGtkWindowLive (dimsForAlloc " +++ show size ++ " --> " ++ show allocSize ++ ")"+ livest <- newGtkWindowLive (currentConfig env) canvas allocSize+ logGUI "putMVar gtkWindowLive"+ putMVar live livest+ logGUI $ "initReaction " ++ show size+ use initReaction >>= flip evalConnectReact evt+ forceDisconnect initReaction+ liftIO $ do+ logGUI "Glib.signalDisconnect initCallback"+ takeMVar initHandler >>= Glib.signalDisconnect+ logGUI "installResizeEventHandler -- a permanent handler"+ installResizeEventHandler+ return False++-- | This function installs the configure event handler, which is called whenever the window is+-- resized.+installResizeEventHandler :: GtkState ()+installResizeEventHandler = do+ logGUI <- mkLogger "installResizeEventHandler" True+ env <- get+ liftIO $ do+ logGUI "Glib.on window Gtk.configureEvent"+ void $ Glib.on (gtkWindow env) Gtk.configureEvent $ do+ logGUI <- mkLogger "configureEventCallback" True+ canvas <- Gtk.eventWindow+ size <- Gtk.eventSize+ let evt = sampCoord <$> uncurry V2 size+ liftIO $ lockGtkWindow (GtkUnlockedWin $ thisWindow env) $ do+ liftIO $ logGUI $ "resizeGtkDrawContext " ++ show size+ resizeGtkDrawContext canvas size+ liftIO $ logGUI "resizeReaction"+ use resizeReaction >>= flip evalConnectReact evt+ liftIO $ do+ logGUI "Gtk.widgetQueueDraw"+ Gtk.widgetQueueDraw (gtkWindow env)+ return False++-- | This event handler is responsible for cleaning up when a window close event occurs. Whether the+-- application quit or not when the window closes is configurable by parameters in the+-- 'Happlets.Config.Config' data structure.+installDeleteEventHandler :: GtkState ()+installDeleteEventHandler = do+ logGUI <- mkLogger "installDeleteEventHandler" True+ env <- get+ liftIO $ do+ logGUI "Glib.on Gtk.deleteEvent"+ Glib.on (gtkWindow env) Gtk.deleteEvent $ liftIO $+ lockGtkWindow (GtkUnlockedWin $ thisWindow env) $ do+ logGUI <- mkLogger "deleteWindowCallback" True+ let cfg = currentConfig env+ if cfg ^. deleteWindowOnClose+ then do+ liftIO $ logGUI "Gtk.widgetDestroy -- willDeleteWindowOnClose is True"+ disconnectAll+ liftIO $ Gtk.widgetDestroy (gtkWindow env)+ else liftIO $ do+ logGUI $ "Gtk.widgetHideAll -- willDeleteWindowOnClose is False"+ Gtk.widgetHideAll (gtkWindow env)+ liftIO $ if not (cfg ^. quitOnWindowClose)+ then logGUI "-- quitOnWindowClose is False"+ else do+ logGUI $ "Gtk.mainQuit -- quitOnWindowClose is True"+ Gtk.mainQuit+ return True+ logGUI "-- done installing permanent event handlers"++deleteWin :: GtkWindowState -> IO ()+deleteWin env = do+ logGUI <- mkLogger "deleteWin" True+ logGUI "Gtk.widgetDestroy"+ Gtk.widgetDestroy (gtkWindow env)++--evalGtkDraw :: GtkDraw -> GtkState ()+--evalGtkDraw (CairoRender draw) = get >>= \ env -> liftIO $ case theGtkPixmap env of+-- Just pixmap -> Gtk.renderWithDrawable pixmap draw+-- Nothing -> Gtk.widgetGetDrawWindow (gtkWindow env) >>= flip Gtk.renderWithDrawable draw++-- | Compute rectangular dimensions for a window buffer allocation that are large enough to contain+-- the given rectangluar dimensions, but are also an even multiple of some unit value. When resizing+-- windows with 'resizeGtkDrawContext' this function is used to decide whether it is necessary to+-- re-allocate the window buffer or if the old window buffer is still large enough to contain the+-- new window dimensions.+dimsForAlloc :: (Int, Int) -> (Int, Int)+dimsForAlloc (w, h) = (step w, step h) where+ factor = 32+ step a = (div (abs a) factor + 1) * factor+ -- For 32-bit pixels, with a minimum alloctable rectangle size of 32*32 means the minimum buffer+ -- allocation will be 32*32*32 = 32^3 = (2^5)^3 = 2^15 = 32768 bytes.++-- | This function obtains a widget drawing window object and it's size, and allocates a new pixmap+-- buffer and GDK drawing context for it. This function conditionally calls 'newGtkWindowLive' if+-- 'dimsForAlloc' returns a different value than what is already allocated. This function also locks+-- the 'gtkWindowLive' MVar, so it is assumed the MVar is not empty. So this function must not be+-- called until the "initCallback" has been evaluated.+resizeGtkDrawContext :: Gtk.DrawWindow -> (Int, Int) -> GtkState ()+resizeGtkDrawContext canvas size = do+ logGUI <- mkLogger "resizeGtkDrawContext" True+ env <- get+ let cfg = currentConfig env+ let newDims = dimsForAlloc size+ liftIO $ modifyMVar_ (gtkWindowLive env) $ \ livest -> do+ oldDims <- Gtk.drawableGetSize (theGtkPixmap livest)+ if newDims == oldDims+ then do+ logGUI $ "-- will not re-allocate window buffer, old buffer size = " +++ show oldDims ++ ", new buffer size = " ++ show newDims+ return livest+ else do+ logGUI $ "gtkAllocNewPixmap " ++ show newDims+ newGtkWindowLive cfg canvas newDims++-- | Allocates a new 'GtkWindowLive', including the 'Gtk.Pixmap' buffer and 'Gtk.GC' graphics+-- context. The buffer allocated will be exactly the dimensions given without checking if the size+-- is valid, and invalid demensions will crash the thread.+newGtkWindowLive :: Config -> Gtk.DrawWindow -> (Int, Int) -> IO GtkWindowLive+newGtkWindowLive cfg canvas size@(w, h) = do+ logGUI <- mkLogger "gtkAllocNewPixmap" True+ let depth = Just $ if isJust $ cfg ^. backgroundTransparency then 32 else 24+ let grey = cfg ^. backgroundGreyValue+ logGUI $ "Gtk.pixmapNew " ++ show size ++ ' ' : show depth+ pixmap <- Gtk.pixmapNew (Just canvas) w h depth+ --logGUI $ "Gtk.gcNew -- should be Gtk.DrawWindow of 'window'"+ --graphCtx <- Gtk.gcNew canvas+ --gcVals <- Gtk.gcGetValues graphCtx+ --logGUI $ "Gtk.gcSetValues"+ --Gtk.gcSetValues graphCtx gcVals+ -- { Gtk.background = dToGrey grey+ -- , Gtk.tile = Just pixmap+ -- , Gtk.fill = Gtk.Tiled+ -- }+ gc <- liftIO $ Gtk.gcNewWithValues canvas Gtk.newGCValues+ { Gtk.background = dToGrey grey+ , Gtk.tile = Just pixmap+ , Gtk.fill = Gtk.Tiled+ }+ return GtkWindowLive+ { gtkDrawWindow = canvas+ , theGtkPixmap = pixmap+ , theGtkGraphCtx = gc+ }++disconnectAll :: GtkState ()+disconnectAll = do+ forceDisconnect visibilityReaction+ forceDisconnect focusReaction+ forceDisconnect mouseHandler+ forceDisconnect cursorHandler+ forceDisconnect keyHandler+ forceDisconnect animatorThread+ forceDisconnect resizeReaction++----------------------------------------------------------------------------------------------------++-- | This is a type of 'Happlets.GUI.GUI' function where the @window@ type is 'GtkWindow' and the+-- @draw@ type is 'GtkDraw' (a Cairo 'Graphics.Rendering.Cairo.Render' function).+type GtkGUI model a = GUI GtkWindow model a++-- | Creates a happlet and associates it with a window.+gtkNewWindow :: Config -> IO GtkWindow+gtkNewWindow cfg = do+ logGUI <- mkLogger "gtkWindowNew" True+ logGUI "createWin"+ GtkUnlockedWin . thisWindow <$> createWin cfg++gtkWindowVisible :: Bool -> GtkGUI model ()+gtkWindowVisible visible = do+ logGUI <- mkLogger ("gtkWindowVisible "++show visible) True+ runGtkStateGUI $ get >>= \ env -> liftIO $ do+ if visible+ then do+ logGUI "Gtk.widgetShow"+ Gtk.widgetShowAll (gtkWindow env)+ logGUI "Gtk.widgetQueueDraw"+ Gtk.widgetQueueDraw (gtkWindow env)+ else do+ logGUI "Gtk.widgetHideAll"+ Gtk.widgetHideAll (gtkWindow env)++gtkAttachHapplet :: Bool -> GtkWindow -> Happlet model -> (PixSize -> GtkGUI model ()) -> IO ()+gtkAttachHapplet showWin win happ init = do+ logGUI <- mkLogger "gtkAttachHapplet" True+ logGUI "lockGtkWindow"+ lockGtkWindow win $ do+ disconnectAll+ initReaction .= ConnectReact+ { doDisconnect = return () -- This function is disconnected automatically by the init callback.+ , doReact = \ size -> do+ logGUI <- mkLogger "initReaction" True+ env <- get+ liftIO $ logGUI $ "gtkRunHapplet " ++ show size+ void $ gtkRunHapplet happ (const $ return ()) $ init size+ when showWin $ liftIO $ do+ logGUI "Gtk.widgetShowAll"+ Gtk.widgetShowAll (gtkWindow env)+ logGUI "Gtk.widgetQueueDraw"+ Gtk.widgetQueueDraw (gtkWindow env)+ return False+ }+ win <- gets gtkWindow+ liftIO $ logGUI "Gtk.widgetShow" >> Gtk.widgetShow win++-- | Change the happlet displayed in the current window. Remove the current Happlet event handlers+-- and re-install the event handlers for the given Happlet.+gtkSetHapplet :: Happlet newmodel -> (PixSize -> GtkGUI newmodel ()) -> GtkGUI oldmodel ()+gtkSetHapplet newHapp init = do+ logGUI <- mkLogger "windowSetHapplet" True+ oldHapp <- askHapplet+ if sameHapplet oldHapp newHapp+ then liftIO $ logGUI "-- the Happlet given is the one that is already attached to this window"+ else do+ liftIO $ logGUI "disconnectAll -- on current window"+ runGtkStateGUI disconnectAll+ st <- getGUIState+ (env, _) <- case theGUIWindow st of+ GtkUnlockedWin{} -> error $ "gtkSetHapplet: " +++ "Evaluated a GtkState function within a GtkGUI function on a locked GtkWindow."+ -- The 'window' value passed to the 'evalGUI' function must be a 'GtkLockedWin' constructor.+ GtkLockedWin env -> liftIO $ do+ size <- Gtk.widgetGetDrawWindow (gtkWindow env) >>= Gtk.drawableGetSize+ let evt = sampCoord <$> uncurry V2 size+ logGUI $ "onHapplet -- run initializer " ++ show size+ onHapplet newHapp $+ liftM (theGUIWindow &&& theGUIModel) . evalGUI (init evt) newHapp (GtkLockedWin env)+ --logGUI "Gtk.widgetQueueDraw"+ --Gtk.widgetQueueDraw $ gtkWindow win+ --logGUI "Gtk.widgetShow"+ --Gtk.widgetShow $ gtkWindow win+ putGUIState $ st{ theGUIWindow = env }+ void disable++-- Set which function redraws the window.+evalRedraw :: (PixSize -> CairoRender a) -> GtkState a+evalRedraw redraw = do+ logGUI <- mkLogger "evalRedraw" True+ env <- get+ liftIO $ withMVar (gtkWindowLive env) $ \ livest -> do+ -- Obtain the size from the draw window, but will not draw to the draw window.+ size <- fmap sampCoord . uncurry V2 <$> Gtk.drawableGetSize (gtkDrawWindow livest)+ logGUI "Gtk.renderWithDrawable -- to theGtkPixmap"+ a <- Gtk.renderWithDrawable (theGtkPixmap livest) $ runCairoRender $ redraw size+ (w, h) <- Gtk.drawableGetSize (gtkDrawWindow livest)+ region <- Gtk.regionRectangle $ Gtk.Rectangle 0 0 w h+ logGUI "Gtk.drawWindowInvalidateRegion"+ Gtk.drawWindowInvalidateRegion (gtkDrawWindow livest) region True+ return a++----------------------------------------------------------------------------------------------------++instance HappletWindow GtkWindow CairoRender where+ windowChangeHapplet = gtkSetHapplet+ onView = runGtkStateGUI . evalRedraw++instance Happlet2DGraphics CairoRender where+ clearScreen = unpackRGBA32Color >>> \ (r,g,b,a) -> CairoRender $ cairoClearCanvas r g b a+ drawLine = cairoDrawLine+ drawPath = cairoDrawPath+ drawRect = cairoDrawRect+ setPoint = error "TODO: canvasSetPoint has not yet been implemented in this Happlets back-end"+ getPoint = error "TODO: canvasGetPoint has not yet been implemented in this Happlets back-end"++-- | Push the graphics context by calling 'Cairo.save' before evaluating a given 'Cario.Render'+-- function. When evaluation completes, pop the graphics context by calling 'Cairo.restore'.+cairoPreserve :: CairoRender a -> CairoRender a+cairoPreserve f = CairoRender Cairo.save >> f <* CairoRender Cairo.restore++cairoMoveTo :: Point2D RealApprox -> CairoRender ()+cairoMoveTo = CairoRender . uncurry Cairo.moveTo . view pointXY . fmap unwrapRealApprox++cairoLineTo :: Point2D RealApprox -> CairoRender ()+cairoLineTo = CairoRender . uncurry Cairo.lineTo . view pointXY . fmap unwrapRealApprox++cairoDrawLine :: LineColor -> LineWidth -> Line2D RealApprox -> CairoRender ()+cairoDrawLine color width line = cairoPreserve $ do+ CairoRender $ do+ cairoSetColorRGBA32 color+ Cairo.setLineCap Cairo.LineCapRound+ Cairo.setLineWidth $ unwrapRealApprox width+ cairoMoveTo $ line ^. line2DHead+ cairoLineTo $ line ^. line2DTail+ CairoRender $ Cairo.stroke++cairoDrawPath :: LineColor -> LineWidth -> [Point2D RealApprox] -> CairoRender ()+cairoDrawPath color width =+ let run a ax = cairoPreserve $ do+ CairoRender $ do+ cairoSetColorRGBA32 color+ Cairo.setLineCap Cairo.LineCapRound+ Cairo.setLineWidth $ unwrapRealApprox width+ Cairo.setLineJoin Cairo.LineJoinMiter+ cairoMoveTo a+ forM_ ax cairoLineTo+ CairoRender Cairo.stroke+ in \ case { [] -> return (); [a] -> run a [a]; a:ax -> run a ax; }++cairoDrawRect :: LineColor -> LineWidth -> FillColor -> Rect2D RealApprox -> CairoRender ()+cairoDrawRect lineColor width fillColor rect = cairoPreserve $ do+ CairoRender $ cairoSetColorRGBA32 fillColor+ cairoMoveTo $ rect ^. rect2DHead+ let ((x0,y0),(x1,y1)) = view pointXY *** view pointXY $+ (unwrapRealApprox <$> rect) ^. rect2DPoints+ CairoRender $ do+ Cairo.rectangle x0 y0 x1 y1+ Cairo.fill+ cairoSetColorRGBA32 lineColor+ Cairo.setLineWidth $ unwrapRealApprox width+ Cairo.setLineJoin Cairo.LineJoinMiter+ Cairo.rectangle x0 y0 x1 y1+ Cairo.stroke++--cairoSelectFont :: SelectFont -> GtkGUI model (Maybe FontExtents)+--cairoSelectFont font0 = runGtkStateGUI $ evalCairo $ do+-- let loop (bold,italic,oblique,syms) = \ case+-- [] -> (bold, italic, oblique, Strict.unwords $ syms [])+-- a:ax -> let w = Strict.toLower a in ax & case w of+-- w | w == Strict.pack "bold" -> loop (bold + 1, italic, oblique, syms)+-- w | w == Strict.pack "italic" -> loop (bold, italic + 1, oblique, syms)+-- w | w == Strict.pack "oblique" -> loop (bold, italic, oblique + 1, syms)+-- _ -> loop (bold, italic, oblique, syms . (a :))+-- let zero = 0 :: Int+-- let one = 1 :: Int+-- let (bold,italic,oblique,font) = loop (0, 0, 0, id) $ Strict.words font0+-- if italic > zero && oblique > zero || bold > one || italic > one || oblique > one+-- then return Nothing+-- else do+-- Cairo.selectFontFace font+-- (if italic > 0 then Cairo.FontSlantItalic else+-- if oblique > 0 then Cairo.FontSlantOblique else Cairo.FontSlantNormal)+-- (if bold > 0 then Cairo.FontWeightBold else Cairo.FontWeightNormal)+-- ext <- Cairo.fontExtents+-- return $ Just FontExtents+-- { fontExtentsAscent = RealApprox $ Cairo.fontExtentsAscent ext+-- , fontExtentsDescent = RealApprox $ Cairo.fontExtentsDescent ext+-- , fontExtentsHeight = RealApprox $ Cairo.fontExtentsHeight ext+-- , fontExtentsMaxXadvance = RealApprox $ Cairo.fontExtentsMaxXadvance ext+-- , fontExtentsMaxYadvance = RealApprox $ Cairo.fontExtentsMaxYadvance ext+-- }++----------------------------------------------------------------------------------------------------++instance Managed GtkWindow where+ windowVisible = gtkWindowVisible+ visibleEvents = installEventHandler "visibleEvents" visibilityReaction+ [Gtk.VisibilityNotifyMask] $ \ logGUI env next -> do+ let win = gtkWindow env+ logGUI "Glib.on Gtk.visibilityNotifyEvent"+ vis <- Glib.on win Gtk.visibilityNotifyEvent $+ Gtk.eventVisibilityState >>=+ liftIO . next . not . (== Gtk.VisibilityFullyObscured) >>+ return False+ return $ do+ Glib.signalDisconnect vis+ focusEvents = installEventHandler "focusEvents" focusReaction+ [Gtk.FocusChangeMask] $ \ logGUI env next -> do+ let win = gtkWindow env+ logGUI "Glib.on Glib.focusInEvent"+ focin <- Glib.on win Gtk.focusInEvent $ liftIO (next True) >> return False+ logGUI "Glib.on Glib.focusOutEvent"+ focout <- Glib.on win Gtk.focusOutEvent $ liftIO (next False) >> return False+ return $ do+ Glib.signalDisconnect focin+ Glib.signalDisconnect focout++instance CanResize GtkWindow where+ resizeEvents = installEventHandler "resizeEvents" resizeReaction [] (\ _ _ _ -> return $ pure ())++data AnimationThreadControl+ = AnimationThreadControl+ { animationThreadAlive :: !Bool+ , animationInitTime :: !UTCTime+ }++instance CanAnimate GtkWindow where+ animationIsRunning = runGtkStateGUI $+ gets theAnimatorThread <&> \ case { Disconnected -> False; _ -> True; }+ stepFrameEvents react = do+ flip (installEventHandler "stepFrameEvents" animatorThread []) react $ \ logGUI env next -> do+ --let rate = env & theAnimationFrameRate . currentConfig -- TODO: restore this!!!+ let rate = 0.05 -- any slow rate+ t0 <- getCurrentTime+ t0ref <- newIORef AnimationThreadControl+ { animationThreadAlive = True+ , animationInitTime = t0+ }+ logGUI "Glib.on Glib.timeoutAdd"+ frame <- flip Glib.timeoutAdd (min 200 $ floor (1000.0 / rate)) $ do+ AnimationThreadControl{animationThreadAlive=alive,animationInitTime=t0} <- readIORef t0ref+ if not alive then return False else + diffUTCTime <$> getCurrentTime <*> pure t0 >>= next . realToFrac+ --+ -- TODO: the 'next' function needs to be evaluated here at time 0, becuase 'timeoutAdd' does+ -- not call it until after the first time step interval has passed. For slow animations, this+ -- will cause a noticable delay between the time the 'stepFrameEvents' function is evaluated+ -- and the first frame callback is evaluated.+ return $ do+ logGUI "Glib.signalDisconnect"+ modifyIORef t0ref $ \ ctrl -> ctrl{ animationThreadAlive = False }+ Glib.timeoutRemove frame++instance CanKeyboard GtkWindow where+ keyboardEvents = installEventHandler "keyboardEvents" keyHandler+ [Gtk.KeyReleaseMask, Gtk.KeyPressMask] $ \ logGUI env next -> do+ let win = gtkWindow env+ logGUI "Glib.on Gtk.keyReleaseEvent"+ press <- Glib.on win Gtk.keyReleaseEvent $+ handleKey False >>= liftIO . next >> return False+ logGUI "Glib.on Gtk.keyPressEvent"+ release <- Glib.on win Gtk.keyPressEvent $+ handleKey True >>= liftIO . next >> return False+ return $ do+ logGUI "Glib.signalDisconnect"+ Glib.signalDisconnect press+ Glib.signalDisconnect release++instance CanMouse GtkWindow where+ providedMouseDevices = return []+ mouseEvents = \ case+ MouseButton -> installEventHandler "mouseButtonEvents" mouseHandler+ [Gtk.ButtonPressMask] $ \ logGUI env next -> do+ let win = gtkWindow env+ logGUI "Glib.on Gtk.buttonPressEvent"+ press <- Glib.on win Gtk.buttonPressEvent $+ handleMouse True >>= liftIO . next >> return False+ release <- Glib.on win Gtk.buttonReleaseEvent $+ handleMouse False >>= liftIO . next >> return False+ return $ do+ logGUI "Glib.signalDisconnect"+ Glib.signalDisconnect press+ Glib.signalDisconnect release+ MouseDrag -> installEventHandler "mouseDragEvents" mouseHandler+ [Gtk.ButtonPressMask, Gtk.ButtonMotionMask] $ \ logGUI env next -> do+ let win = gtkWindow env+ logGUI "Glib.on Gtk.buttonPressEvent"+ press <- Glib.on win Gtk.buttonPressEvent $+ handleMouse True >>= liftIO . next >> return False+ logGUI "Glib.on Gtk.buttonReleaseEvent"+ release <- Glib.on win Gtk.buttonReleaseEvent $+ handleMouse False >>= liftIO . next >> return False+ logGUI "Glib.on Gtk.motionNotifyEvent"+ button <- Glib.on win Gtk.motionNotifyEvent $+ handleCursor True >>= liftIO . next >> return False+ return $ do+ logGUI "Glib.signalDisconnect"+ Glib.signalDisconnect press+ Glib.signalDisconnect release+ Glib.signalDisconnect button+ MouseAll -> installEventHandler "mouseAllEvents" mouseHandler+ [Gtk.PointerMotionMask, Gtk.ButtonMotionMask] $ \ logGUI env next -> do+ let win = gtkWindow env+ logGUI "Glib.on Gtk.motionNotifyEvent"+ button <- newIORef False+ press <- Glib.on win Gtk.buttonPressEvent $+ liftIO (writeIORef button False) >>+ handleMouse True >>= liftIO . next >> return False+ release <- Glib.on win Gtk.buttonReleaseEvent $+ liftIO (writeIORef button True) >>+ handleMouse False >>= liftIO . next >> return False+ motion <- Glib.on win Gtk.motionNotifyEvent $+ liftIO (readIORef button) >>=+ handleCursor >>=liftIO . next >> return False+ return $ do+ logGUI "Glib.signalDisconnect"+ Glib.signalDisconnect press+ Glib.signalDisconnect release+ Glib.signalDisconnect motion++-- | This function enables an event handler, and takes a continuation which will be evaluated by+-- this function call to do the low-level work of install the event handler into the Gtk+-- window. This function also does the work of taking a 'Happlets.GUI.GUI' function to be evaluated+-- on each event, converting this function to a 'ConnectReact' function, and installing it into the+-- 'GtkWindow's internal state so that it can be actually evaluated every time the low-level event+-- handler is evaluated. The result is a function that can be used to instantiate any of the+-- "Happlets.GUI" module's event handler classes.+installEventHandler+ :: String+ -> Lens' GtkWindowState (ConnectReact event)+ -> [Gtk.EventMask]+ -> (LogGUI -> GtkWindowState -> (event -> IO Bool) -> IO (IO ()))+ -> (event -> GtkGUI model ())+ -> GtkGUI model ()+installEventHandler logString connectReact masks install react = do+ logGUI <- mkLogger logString True+ happ <- askHapplet+ liftIO $ logGUI "runGtkStateGUI"+ runGtkStateGUI $ do+ env <- get+ callback <- use connectReact+ disconnect <- case callback of+ ConnectReact{doDisconnect=disconnect} -> do+ liftIO $ logGUI "-- event handler already installed"+ return disconnect+ Disconnected -> liftIO $ do+ logGUI "-- install event handler"+ disconnect <- install logGUI env $ \ event -> do+ logGUI "lockGtkWindow"+ lockGtkWindow (GtkUnlockedWin $ thisWindow env) $ do+ stillAlive <- use connectReact >>= flip evalConnectReact event+ unless stillAlive $ forceDisconnect connectReact+ return stillAlive+ logGUI $ "Gtk.widgetAddEvents " ++ show masks+ Gtk.widgetAddEvents (gtkWindow env) masks+ return $ liftIO $ do+ logGUI $ "Gtk.widgetDelEvents " ++ show masks+ Gtk.widgetDelEvents (gtkWindow env) masks+ disconnect+ liftIO $ logGUI "resizeReaction -- now enabled"+ connectReact .= ConnectReact+ { doReact = gtkRunHapplet happ (checkGUIContinue logGUI resizeReaction) . react+ , doDisconnect = disconnect+ }++handleMouse :: Pressed -> Gtk.EventM Gtk.EButton Mouse+handleMouse upDown = do+ logGUI <- mkLogger "handleMouse" True+ (x, y) <- Gtk.eventCoordinates+ button <- getMouseButton+ mods <- packGtkModifiers <$> Gtk.eventModifierAll+ let evt = Mouse "" upDown mods button (V2 (round x) (round y))+ liftIO $ logGUI $ "handleMouse " ++ show evt+ return evt++handleCursor :: Pressed -> Gtk.EventM Gtk.EMotion Mouse+handleCursor upDown = do+ logGUI <- mkLogger "handleCursor" True+ (x, y) <- Gtk.eventCoordinates+ mods <- packGtkModifiers <$> Gtk.eventModifierAll+ let evt = Mouse "" upDown mods MotionOnly (V2 (round x) (round y))+ liftIO $ logGUI $ "handleCursor " ++ show evt+ return evt++handleKey :: Pressed -> Gtk.EventM Gtk.EKey Keyboard+handleKey upDown = do+ logGUI <- mkLogger "handleKey" True+ key <- Gtk.eventKeyVal+ mods <- packGtkModifiers <$> Gtk.eventModifierAll+ let evt = RawKey upDown mods key+ liftIO $ logGUI $ "handleKey " ++ show evt+ return evt++getMouseButton :: Gtk.EventM Gtk.EButton MouseButton+getMouseButton = Gtk.eventButton <&> \ case+ Gtk.LeftButton -> LeftClick+ Gtk.MiddleButton -> MiddleClick+ Gtk.RightButton -> RightClick+ Gtk.OtherButton{} -> SideClick++packGtkModifiers :: [Gtk.Modifier] -> ModifierBits+packGtkModifiers = packModifiers .+ ( (=<<) $ \ case+ Gtk.Shift -> [Shift]+ Gtk.Lock -> [CapsLock]+ Gtk.Control -> [Ctrl]+ Gtk.Alt -> [Alt1]+ Gtk.Alt2 -> [Alt2]+ Gtk.Super -> [Super1]+ Gtk.Hyper -> [Super2]+ _ -> []+ )++--screenMasksToGdkRegion :: [ScreenMask] -> (Int, Int) -> IO Gtk.Region+--screenMasksToGdkRegion masks (w, h) = do+-- logGUI <- mkLogger "screenMasksToGdkRegion" True+-- let center x w = let (a, r) = divMod w 2 in (x - a, x + a + r)+-- let int (SampCoord i) = fromIntegral i :: Int+-- let rect xa' ya' xb' yb' =+-- let xa = int $ min xa' xb'+-- xb = int $ max xa' xb'+-- ya = int $ min ya' yb'+-- yb = int $ max ya' yb'+-- w = xb - xa+-- h = yb - ya+-- in Gtk.Rectangle xa ya w h+-- region <- Gtk.regionNew+-- let union = Gtk.regionUnion region+-- let loop = \ case+-- [] -> return ()+-- mask:masks -> case mask of+-- ScreenAll ->+-- Gtk.regionRectangle (Gtk.Rectangle 0 0 w h) >>= union+-- ScreenRect (V2 xa ya) (V2 xb yb) -> do+-- logGUI $ "Gtk.regionRectangle ScreenRect{ xa="+++-- show xa++", ya="++show ya++", xb="++show xb++", yb="++show yb++" }"+-- Gtk.regionRectangle (rect xa ya xb yb) >>= union+-- loop masks+-- ScreenOval (V2 x y) w h -> do+-- let (xa, xb) = center x w+-- (ya, yb) = center y h+-- -- TODO: Gtk.regionPolygon with approximate oval shape if greater than a certain size.+-- logGUI $ "Gtk.regionRectangle " ++ ("ScreenOval{ x="+++-- show xa++" y="++show ya++" xb="++show xb++" yb="++show yb++" }")+-- Gtk.regionRectangle (rect xa ya xb yb) >>= union+-- loop masks+-- ScreenTriangle (V2 xa ya) (V2 xb yb) (V2 xc yc) -> do+-- let points = [(int xa, int ya), (int xb, int yb), (int xc, int yc)]+-- logGUI $ "Gtk.regionPolygon "++show points+-- Gtk.regionPolygon points Gtk.WindingRule >>= union+-- loop masks+-- ScreenVertical x lo hi ->+-- Gtk.regionRectangle (rect x lo (x + 1) hi) >>= union >> loop masks+-- ScreenHorizontal y lo hi ->+-- Gtk.regionRectangle (rect lo y hi (y + 1)) >>= union >> loop masks+-- loop masks >> return region++---- | Queues a redraw on the area of the window covered by the given list of+---- 'Happlets.Redraw.ScreenMask's.+--updateRegions :: Gtk.DrawWindow -> [ScreenMask] -> IO ()+--updateRegions canvas masks = if null masks then return () else do+-- logGUI <- mkLogger "updateRegions" False+-- region <- Gtk.drawableGetSize canvas >>= screenMasksToGdkRegion masks+-- logGUI "Gtk.drawWindowInvalidateRegion"+-- Gtk.drawWindowInvalidateRegion canvas region True++-- | Blit a 'Gtk.Pixmap' to some drawable canvas.+gdkBlit :: Gtk.DrawableClass canvas => canvas -> Gtk.Pixmap -> PixCoord -> IO ()+--gdkBlit :: Gtk.DrawableClass canvas => canvas -> Gtk.Pixmap -> PixCoord -> [ScreenMask] -> IO ()+gdkBlit canvas pixmap (V2 dx dy) = do+ logGUI <- mkLogger "gdkBlit" True+ --region <- screenMasksToGdkRegion masks (fromIntegral dx, fromIntegral dy)+ (w, h) <- Gtk.drawableGetSize canvas+ -- TODO: This creates an update region for the whole window. This needs to be made more efficient,+ -- such that only the minimal updated region is redrawn.+ region <- Gtk.regionNew+ Gtk.regionRectangle (Gtk.Rectangle 0 0 w h) >>= Gtk.regionUnion region+ logGUI $ "Gtk.gcNewWithValues " ++ show dx ++ ' ' : show dy+ gc <- Gtk.gcNewWithValues canvas $ Gtk.newGCValues+ { Gtk.tile = Just pixmap+ , Gtk.fill = Gtk.Tiled+ , Gtk.tsXOrigin = fromIntegral dx+ , Gtk.tsYOrigin = fromIntegral dy+ }+ Gtk.gcSetClipRegion gc region+ logGUI $ "Gtk.drawRectangle 0 0 " ++ show w ++ ' ' : show h+ Gtk.drawRectangle canvas gc True 0 0 w h + --rects <- Gtk.regionGetRectangles region+ --forM_ rects $ \ rect@(Gtk.Rectangle x y w h) -> do+ -- logGUI $ "Gtk.drawRectangle canvas gc True (" ++ show rect ++ ")"+ -- Gtk.drawRectangle canvas gc True (x + fromIntegral dx) (y + fromIntegral dy) w h++----------------------------------------------------------------------------------------------------++-- | A 'GtkDrawing' is a function that produces a 'Diagrams.Core.Types.Diagram' from a+-- 'Diagrams.BoundingBox.BoundingBox'. Use the 'Diagrams.BoundingBox.BoundingBox' information to+-- inform the placement and scale of your diagram.+type GtkCairoDiagram = BoundingBox V2 Double -> Diagram Cairo++-- | This is a 'Happlets.View.Redraw' type function specific to this Gtk+ back-end provider.+type GtkRedraw a = CairoRender a++-- | This data type contains a pointer to an image buffer in memory, and also a function used to+-- perform some drawing to the pixel values.+data GtkImage+ = GtkImage+ { gtkPixmapMVar :: MVar Gtk.Pixmap+ }++instance CanBufferImages GtkWindow GtkImage CairoRender where+ newImageBuffer (V2 (SampCoord w) (SampCoord h)) (CairoRender draw) = liftIO $ do+ pixmap <- Gtk.pixmapNew (Nothing :: Maybe Gtk.Pixmap)+ (fromIntegral w) (fromIntegral h) (Just 32)+ Gtk.renderWithDrawable pixmap draw+ mvar <- newMVar pixmap+ return GtkImage+ { gtkPixmapMVar = mvar+ }++ resizeImageBuffer (GtkImage{gtkPixmapMVar=mvar}) (V2 w h) (CairoRender draw) =+ liftIO $ modifyMVar mvar $ \ pixmap -> do+ pixmap <- Gtk.pixmapNew (Just pixmap) (fromIntegral w) (fromIntegral h) (Just 32)+ a <- Gtk.renderWithDrawable pixmap draw+ return (pixmap, a)++ drawImage (GtkImage{gtkPixmapMVar=mvar}) (CairoRender draw) =+ liftIO $ withMVar mvar $ flip Gtk.renderWithDrawable draw++ blitImage (GtkImage{gtkPixmapMVar=mvar}) offset = runGtkStateGUI $ do+ gtkwin <- gets gtkWindow+ canvas <- liftIO $ Gtk.widgetGetDrawWindow gtkwin+ liftIO $ withMVar mvar $ \ pixmap -> gdkBlit canvas pixmap offset++ blitImageTo (GtkImage{gtkPixmapMVar=src}) (GtkImage{gtkPixmapMVar=targ}) offset =+ liftIO $ withMVar src $ \ src -> withMVar targ $ \ targ -> gdkBlit targ src offset++-- | This is a helpful function you can use for your 'Happlet.Control.controlRedraw' function to clear+-- the window with a background color, given by the four 'Prelude.Double' parameters for Red, Green,+-- Blue, and Alpha (in that order).+cairoClearCanvas :: Double -> Double -> Double -> Double -> Cairo.Render ()+cairoClearCanvas r g b a = do+ logGUI <- mkLogger "cairoClearCanvas" True+ liftIO $ logGUI $ unwords $ show <$> [r,g,b,a]+ op <- Cairo.getOperator+ Cairo.setOperator Cairo.OperatorSource+ Cairo.setSourceRGBA r g b a+ Cairo.paint+ Cairo.setOperator op++-- | Use the Happlets-native color data type 'Happlets.Draw.Color.PackedRGBA32' to set the Cairo+-- "source" color in the Cairo context.+cairoSetColorRGBA32 :: PackedRGBA32 -> Cairo.Render ()+cairoSetColorRGBA32 = unpackRGBA32Color >>> \ (r,g,b,a) -> Cairo.setSourceRGBA r g b a++-- | Convert a 'GtkCairoDiagram', which is a type of 'Diagrams.Core.Types.Diagram', and convert it+-- to a Cairo 'Cairo.Render'-ing computation which can be used to set the 'controlView' of the+-- 'Controller'.+gtkCairoDiagram :: GtkCairoDiagram -> V2 Double -> Cairo.Render ()+gtkCairoDiagram diagram size = snd $ renderDia Cairo+ ( CairoOptions+ { _cairoFileName = ""+ , _cairoSizeSpec = dims size+ , _cairoOutputType = RenderOnly+ , _cairoBypassAdjust = True+ }+ ) (diagram $ fromCorners origin (P size))++----------------------------------------------------------------------------------------------------++-- | This is the Happlet back-end 'Happlets.Provider.Provider' which you must pass to+-- 'Happlets.GUI.runGUI' in the @main@ function of your Happlet program.+gtkHapplet :: Provider GtkWindow+gtkHapplet = Provider+ { defaultConfig = Config+ { theConfigErrorsOnLoad = []+ , theConfigFilePath = ""+ , theRegisteredAppName = "Happlet"+ , theWindowTitleBar = "Happlet"+ , theBackgroundTransparency = Just 0.9+ , theBackgroundGreyValue = 1.0+ , theRecommendWindowPosition = (0, 30)+ , theRecommendWindowSize = (800, 600)+ , theAnimationFrameRate = 60.0+ , willDecorateWindow = True+ , willQuitOnWindowClose = False+ , willDeleteWindowOnClose = False+ }+ , doInitializeGUI = gtkInit+ , doGUIEventLoopLaunch = gtkLaunchEventLoop+ , doWindowNew = gtkNewWindow+ , doWindowDelete = flip lockGtkWindow $ get >>= liftIO . deleteWin+ , doWindowAttach = gtkAttachHapplet+ }++-- A static variable used to ensure the functions in this module only call 'gtkInit' once.+gtkInitCheck :: MVar Bool+gtkInitCheck = unsafePerformIO $ newMVar False+{-# NOINLINE gtkInitCheck #-}++-- You must call this function prior to all evaluation of any GUI programming. This will call the+-- stateful IO functions that initialize the Gtk+ library. Be sure to call this only once.+gtkInit :: IO ()+gtkInit = do+ alreadyInitd <- readMVar gtkInitCheck+ unless alreadyInitd $ do+ logGUI <- mkLogger "gtkInit" True+ logGUI "Gtk.initGUI"+ Gtk.initGUI >>= mapM_ logGUI+ modifyMVar_ gtkInitCheck $ return . const True++-- | Launch the Gtk+ main event loop. This function will never return. If you fail to call this+-- function, your GUI will never run.+gtkLaunchEventLoop :: Config -> IO ()+gtkLaunchEventLoop cfg = do+ logGUI <- mkLogger "gtkEventLoop" True+ let appName = cfg ^. registeredAppName+ unless (Strict.null appName) $ do+ logGUI $ "Glib.setProgramName " ++ show appName+ Glib.setProgramName appName+ logGUI $ "Glib.setApplicationName " ++ show appName+ Glib.setApplicationName appName+ logGUI "Gtk.mainGUI"+ Gtk.mainGUI
+ src/Happlets/Lib/Gtk/TestSuite.hs view
@@ -0,0 +1,149 @@+module Happlets.Lib.Gtk.TestSuite where++import Happlets.Lib.Gtk++import Control.Arrow++import Linear.V2++import qualified Graphics.Rendering.Cairo as Cairo++----------------------------------------------------------------------------------------------------++main :: IO ()+main = happlet gtkHapplet $ do+ registeredAppName .= "Happlets-Test"+ windowTitleBar .= "Happlets Test"+ recommendWindowSize .= (640, 480)+ quitOnWindowClose .= True+ + win <- newWindow+ pulsecircle <- newHapplet PulseCircle+ { thePulseCircleRadius = 20+ , thePulseCirclePosition = V2 0 0+ , thePulseCircleWindowSize = V2 640 480+ }++ redgrid <- newHapplet (RedGrid 64.0)++ let (changeToPulseCircle, changeToRedGrid) =+ ( windowChangeHapplet pulsecircle $ pulseCircleGUI changeToRedGrid+ , windowChangeHapplet redgrid $ redGridGUI changeToPulseCircle+ )+ attachWindow True win pulsecircle $ pulseCircleGUI changeToRedGrid+ launchGUIEventLoop+ deleteWindow win++----------------------------------------------------------------------------------------------------++newtype RedGrid = RedGrid { theRedGridScale :: RealApprox }+ deriving (Eq, Ord, Show, Read)++redGridScale :: Lens' RedGrid RealApprox+redGridScale = lens theRedGridScale $ \ a b -> a{ theRedGridScale = b }++redGridDraw :: RealApprox -> PixSize -> CairoRender ()+redGridDraw scale = fmap realToFrac >>> \ size@(V2 w h) ->+ if scale <= 1 then clearScreen red else do+ let (V2 centerX centerY) = (/ 2.0) <$> size+ let around top center =+ (takeWhile (>= 0) $ [1 ..] >>= \ i -> [center - scale * i :: RealApprox]) +++ (takeWhile (< top) $ [0 ..] >>= \ i -> [center + scale * i :: RealApprox])+ let mkLine v2 top i = Line2D (Point2D $ v2 i 0) (Point2D $ v2 i top)+ clearScreen (black & alphaChannel .~ 0.9)+ forM_ (around w centerX) $ drawLine red 1.0 . mkLine V2 h+ forM_ (around h centerY) $ drawLine red 1.0 . mkLine (flip V2) w++redGridGUI :: GtkGUI RedGrid () -> PixSize -> GtkGUI RedGrid ()+redGridGUI ctxSwitch _size = do+ let draw = use redGridScale >>= onView . redGridDraw+ resizeEvents $ const draw+ mouseEvents MouseButton $ \ (Mouse _ _ _ button _) -> case button of+ RightClick -> ctxSwitch+ _ -> do+ scale <- use redGridScale+ redGridScale .= if scale <= 4.0 then 64.0 else scale / 2.0+ draw++----------------------------------------------------------------------------------------------------++data PulseCircle+ = PulseCircle+ { thePulseCircleRadius :: !Double+ , thePulseCirclePosition :: !(V2 Double)+ , thePulseCircleWindowSize :: !PixSize+ }+ deriving (Eq, Ord, Show, Read)++pulseCircleRadius :: Lens' PulseCircle Double+pulseCircleRadius = lens thePulseCircleRadius $ \ a b -> a{ thePulseCircleRadius = b }++pulseCirclePosition :: Lens' PulseCircle (V2 Double)+pulseCirclePosition = lens thePulseCirclePosition $ \ a b -> a{ thePulseCirclePosition = b }++pulseCircleWindowSize :: Lens' PulseCircle PixSize+pulseCircleWindowSize = lens thePulseCircleWindowSize $ \ a b -> a{ thePulseCircleWindowSize = b }++type Radius = Double+type PenSize = Double+type Red = Double+type Green = Double+type Blue = Double+type Alpha = Double++circle :: V2 Double -> Radius -> Red -> Green -> Blue -> Alpha -> CairoRender ()+circle (V2 x y) radius red green blue alpha = CairoRender $ do+ op <- Cairo.getOperator+ Cairo.setOperator Cairo.OperatorSource+ Cairo.setSourceRGBA red green blue alpha+ Cairo.arc (x + 0.5) (y + 0.5) radius 0.0 (2.0 * pi)+ Cairo.fill+ Cairo.setOperator op++pulseCircleGUI :: GtkGUI PulseCircle () -> PixSize -> GtkGUI PulseCircle ()+pulseCircleGUI ctxSwitch initSize@(V2 (SampCoord w) (SampCoord h)) = do+ -- Initialize the model such that the circle is placed in the middle of the window.+ pulseCirclePosition .= V2 (realToFrac w / 2) (realToFrac h / 2)+ pulseCircleWindowSize .= initSize++ -- Declare a function for drawing the model:+ let drawDot clear+ (PulseCircle{thePulseCircleRadius=oldR,thePulseCirclePosition=oldXY})+ (PulseCircle{thePulseCircleRadius=newR,thePulseCirclePosition=newXY}) = \ _size -> do+ when clear $ clearScreen (black & alphaChannel .~ 0.9)+ circle oldXY (max oldR newR + 1.0) 0.0 0.0 0.0 0.9+ circle newXY newR 0.0 0.0 1.0 1.0++ -- Install the mouse event handling function.+ mouseEvents MouseDrag $ \ (Mouse _ _ _ button newXY) -> case button of+ RightClick -> ctxSwitch+ _ -> do+ old <- get+ pulseCirclePosition .= (realToFrac <$> newXY)+ new <- get+ onView $ drawDot False old new++ -- On resize, simply redraw the window without modifying the model. We don't need to use the new+ -- size information for the window.+ resizeEvents $ \ newSize@(V2 newW newH) -> do+ old <- get+ let (V2 oldW oldH) = old ^. pulseCircleWindowSize+ let (V2 x y ) = old ^. pulseCirclePosition+ let f n new old = n * realToFrac new / realToFrac old+ pulseCirclePosition .= V2 (f x newW oldW) (f y newH oldH)+ pulseCircleWindowSize .= newSize+ new <- get+ onView $ drawDot True old new++ -- Install an animator thread which makes the radius of the circle as a function of time.+ stepFrameEvents $ \ t -> do+ old <- get+ pulseCircleRadius .= 20 * sin (2*pi * realToFrac t) + 40+ new <- get+ onView $ drawDot False old new++ -- Clear the window. If you don't do this, the behavior of what the initial window will look+ -- like is not defined in the Happlets protocol. It could be a default solid color, or it could+ -- be random garbage.+ model <- get+ onView $ drawDot True model model