barrie (empty) → 0.3.1
raw patch · 13 files changed
+2000/−0 lines, 13 filesdep +basedep +containersdep +filepathsetup-changed
Dependencies added: base, containers, filepath, glib, gtk
Files
- LICENSE +674/−0
- Setup.lhs +3/−0
- barrie.cabal +38/−0
- src/Barrie.lhs +21/−0
- src/Barrie/AbstractGadgets.lhs +24/−0
- src/Barrie/Config.lhs +39/−0
- src/Barrie/DrawPrimitive.lhs +131/−0
- src/Barrie/Gadgets.lhs +383/−0
- src/Barrie/Render.lhs +86/−0
- src/Barrie/Render/Gtk.lhs +412/−0
- src/Barrie/Style.lhs +66/−0
- src/Barrie/Trace.lhs +21/−0
- src/Barrie/Widgets.lhs +102/−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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+ Setup.lhs view
@@ -0,0 +1,3 @@+#! /usr/bin/env runhaskell+> import Distribution.Simple+> main = defaultMain
+ barrie.cabal view
@@ -0,0 +1,38 @@+Name: barrie+Version: 0.3.1+Synopsis: Pure Gtk GUI library+Description:+ Implementation of an idea for supporting certain kinds of GUI:+ that is state based, user-driven ones. The GUI is intended to+ manipulate a state, and it is responsive rather than active.+ Configuration is an example.++Category: GUI+License: GPL+License-file: LICENSE+Author: Fraser Wilson+Maintainer: blancolioni@gmail.com+Copyright: (c) Fraser Wilson+Stability: unstable+cabal-version: >= 0.2+build-type: Simple++Library+ Build-Depends: base,filepath,gtk>=0.10.0,glib>=0.10.0,containers+ Exposed-modules: Barrie+ ghc-options: -Wall -optl-Wl,s+ ghc-prof-options: -prof -auto-all+ other-modules:+ Barrie.AbstractGadgets+ Barrie.Config+ Barrie.DrawPrimitive+ Barrie.Gadgets+ Barrie.Render+ Barrie.Render.Gtk+ Barrie.Style+ Barrie.Trace+ Barrie.Widgets+ extensions: MultiParamTypeClasses,FunctionalDependencies,+ GeneralizedNewtypeDeriving,RankNTypes,ExistentialQuantification+ -- ExistentialQualification+ hs-source-dirs: src
+ src/Barrie.lhs view
@@ -0,0 +1,21 @@+> module Barrie (+> module Barrie.AbstractGadgets,+> module Barrie.DrawPrimitive,+> module Barrie.Gadgets,+> module Barrie.Render,+> module Barrie.Render.Gtk,+> module Barrie.Style,+> module Barrie.Trace,+> module Barrie.Widgets+> )++> where++> import Barrie.AbstractGadgets+> import Barrie.DrawPrimitive+> import Barrie.Gadgets+> import Barrie.Render+> import Barrie.Render.Gtk+> import Barrie.Style+> import Barrie.Trace+> import Barrie.Widgets
+ src/Barrie/AbstractGadgets.lhs view
@@ -0,0 +1,24 @@+> module Barrie.AbstractGadgets (AbstractGadget,+> acommand, achoice, atext, alabel,+> ainner, alocal)+> where++> data AbstractGadget = AG AGadget [String]+> deriving (Read, Show)++> data AGadget = ACommand+> | AChoice+> | AText+> | ALabel+> | AInner+> | ALocal+> deriving (Read, Show)++> acommand, achoice, atext, alabel,+> ainner, alocal :: [String] -> AbstractGadget+> acommand = AG ACommand+> achoice = AG AChoice+> atext = AG AText+> alabel = AG ALabel+> ainner = AG AInner+> alocal = AG ALocal
+ src/Barrie/Config.lhs view
@@ -0,0 +1,39 @@+> {-# OPTIONS_GHC -XMultiParamTypeClasses -XFunctionalDependencies #-}++> module Barrie.Config where++> data Config a = Cfg {+> cEnabled :: a -> Bool,+> cLabel :: Maybe (a -> String)+> }++> defaultConfig :: Config a+> defaultConfig = Cfg { cEnabled = const True, cLabel = Nothing }++> transformConfig :: (a -> b) -> Config b -> Config a+> transformConfig get cfg = cfg { cEnabled = cEnabled cfg . get,+> cLabel = label'+> }+> where label' = case cLabel cfg of+> Nothing -> Nothing+> Just f -> Just $ f . get+++> enabledCfg :: (a -> Bool) -> Config a -> Config a+> enabledCfg f config = config { cEnabled = f }++> isEnabled :: Config a -> a -> Bool+> isEnabled config state = cEnabled config state++> labelConfig :: (a -> String) -> Config a -> Config a+> labelConfig f config = config { cLabel = Just f }++> configHasLabel :: Config a -> Bool+> configHasLabel Cfg { cLabel = Nothing } = False+> configHasLabel _ = True++> configLabel :: Config a -> a -> String+> configLabel Cfg { cLabel = Just f } st = f st+> configLabel _ _ =+> error "tried to get a label from a config which has none"+
+ src/Barrie/DrawPrimitive.lhs view
@@ -0,0 +1,131 @@+> module Barrie.DrawPrimitive+> (DrawFunction, Picture, Colour,+> background,+> setForeground,+> lineTo, moveTo, line, lineWidth, move, rectangle, polygon,+> multiLine, circle,+> image, showText,+> black, white, fromRGB,+> doDraw)+> where++> import qualified Graphics.UI.Gtk as Gtk++> type Picture = Gtk.Pixmap++> data Colour = RGB Int Int Int deriving (Eq)++> black, white :: Colour+> black = fromRGB 0 0 0+> white = fromRGB 65535 65535 65535++> data DrawPrimitive = Background Colour+> | SetForeground Colour+> | SetLineThickness Int+> | Line Int Int+> | LineTo Int Int+> | LineWidth Int+> | Move Int Int+> | MoveTo Int Int+> | Polygon Bool [(Int, Int)]+> | Circle Bool Int+> | Rectangle Bool Int Int+> | ShowText String+> | Image String+> deriving (Eq)++> type DrawFunction = [DrawPrimitive] -> [DrawPrimitive]++> background :: Colour -> DrawFunction+> lineTo, moveTo, line, move :: Int -> Int -> DrawFunction+> lineWidth :: Int -> DrawFunction+> rectangle :: Bool -> Int -> Int -> DrawFunction+> polygon :: Bool -> [(Int, Int)] -> DrawFunction+> circle :: Bool -> Int -> DrawFunction+> showText :: String -> DrawFunction+> image :: String -> DrawFunction+> multiLine :: [(Int,Int)] -> DrawFunction+> setForeground :: Colour -> DrawFunction++> background colour xs = Background colour : xs+> lineTo x y xs = LineTo x y : xs+> moveTo x y xs = MoveTo x y : xs+> line x y xs = Line x y : xs+> lineWidth w xs = LineWidth w : xs+> move x y xs = Move x y : xs+> rectangle filled width height xs = Rectangle filled width height : xs+> polygon filled pts xs = Polygon filled pts : xs+> circle filled r xs = Circle filled r : xs+> showText text xs = ShowText text : xs+> image pic = (:) (Image pic)++> multiLine [] = id+> multiLine ((x, y):pts) = moveTo x y . foldl (.) id (map (uncurry lineTo) pts)++> setForeground col xs = SetForeground col : xs++> fromRGB :: Int -> Int -> Int -> Colour+> fromRGB = RGB++> toGtkColour :: Colour -> IO Gtk.Color+> toGtkColour (RGB r g b) = return $ Gtk.Color (cvt r) (cvt g) (cvt b)+> where cvt = fromInteger . toInteger++> doDraw :: Gtk.Pixmap+> -> Gtk.GC+> -> Gtk.PangoContext+> -> (Int,Int)+> -> [DrawPrimitive]+> -> IO ()+> doDraw _ _ _ _ [] = return ()+> doDraw win gc context (x,y) (p:ps) = do (newP,newGC) <- drawPrimitive p+> doDraw win newGC context newP ps+> where noChange = return ((x,y),gc)+> drawPrimitive (MoveTo x' y') = return ((x', y'), gc)+> drawPrimitive (Move dx dy) = return ((x + dx, y + dy), gc)+> drawPrimitive (LineTo x' y') = do+> Gtk.drawLine win gc (x,y) (x',y')+> return ((x',y'), gc)+> drawPrimitive (Line dx dy) = do+> let (x',y') = (x + dx, y + dy)+> Gtk.drawLine win gc (x,y) (x', y')+> return ((x',y'), gc)+> drawPrimitive (LineWidth w) = do+> Gtk.gcSetValues gc Gtk.newGCValues { Gtk.lineWidth = w }+> return ((x,y), gc)+> drawPrimitive (Rectangle filled width height) = do+> Gtk.drawRectangle win gc filled x y width height+> noChange+> drawPrimitive (Polygon _ []) = noChange+> drawPrimitive (Polygon filled pts) = do+> Gtk.drawPolygon win gc filled pts+> return (last pts, gc)+> drawPrimitive (Circle filled r) = do+> Gtk.drawArc win gc filled (x - r) (y - r)+> (r * 2) (r * 2) 0 (360 * 64)+> return ((x,y),gc)+> drawPrimitive (ShowText text) = do+> layout <- Gtk.layoutText context text+> layoutLine <- Gtk.layoutGetLine layout 0+> Gtk.drawLayoutLine win gc x y layoutLine+> return ((x,y),gc)+> drawPrimitive (SetForeground colour) = do+> col <- toGtkColour colour+> Gtk.gcSetValues gc $ Gtk.newGCValues {+> Gtk.foreground = col+> }+> return ((x,y),gc)+> drawPrimitive (Background colour) = do+> backgc <- Gtk.gcNew win+> gtkColour <- toGtkColour colour+> Gtk.gcSetValues backgc Gtk.newGCValues {+> Gtk.foreground = gtkColour+> }+> (width, height) <- Gtk.drawableGetSize win+> Gtk.drawRectangle win backgc True 0 0 width height+> Gtk.drawRectangle win backgc False 0 0 width height+> return ((x,y),gc)+> drawPrimitive (Image pic) = do+> pb <- Gtk.pixbufNewFromFile pic+> Gtk.drawPixbuf win gc pb 0 0 x y (-1) (-1) Gtk.RgbDitherNormal 0 0+> return ((x,y),gc)
+ src/Barrie/Gadgets.lhs view
@@ -0,0 +1,383 @@+> module Barrie.Gadgets (Gadget, Behaviour,+> findGadget, gadgets, abstract, gadgetName,+> commandG,+> displayG, displayG', textDisplayG,+> editorG, editorG', textEditorG,+> chooserG, chooserG', textChooserG, enumChooserG,+> localG, innerG,+> enabled, gadgetEnabled, dynamicLabel,+> gadgetConfig,+> connectChooserDisplay,+> connectDisplayGadget,+> connectEditorGadget,+> connectCommandGadget,+> connectInnerGadget+> ) where++> import Data.List+> import Control.Monad++> import Barrie.AbstractGadgets+> import Barrie.Config+> import Barrie.Trace++> data Behaviour a = B [Gadget a]++> -- |A gadget is a piece of user interface functionality (as opposed+> -- to a widget, which is a piece of user interface rendering).++> data Gadget a = G { gFullName :: [String],+> gConfig :: Config a,+> gElement :: Element a+> }++> -- |The semantics of a gadget are defined by its Element.+> -- Internally, all element manipulation is perform via conversions+> -- to and from String, which is a shame, but there it is.+> -- It is not beyond the bounds of possibility that existential types+> -- are a solution to this problem, but for now, this is where we+> -- are. The exported constructor functions hide this wart, to some+> -- extent (e.g. you can use showG for an instance of Show, or+> -- showG' to supply your own show function).++> -- |An element comes in five flavours:++> -- |Display: presents a value to the user. For example: labels,+> -- |read-only text boxes, check boxes, radio buttons -- anything+> -- |with a simple display.++> -- |Editor: a display that can edit, such as a text box, a check+> -- |box, or a slider.++> -- |Command: a gadget that updates the state, sort of like a+> -- |write-only Editor for type (), where the only thing you know is+> -- |that it's been activated (so the () argument can be dropped).+> -- |Can be rendered with buttons, menu items, that sort of thing.++> -- |Chooser: like displays and editors, but the values come from a+> -- |restricted set of possiblities. The value is a Maybe String,+> -- |because it's possible (and often reasonable) to not choose+> -- |anything.++> -- |Inner: a single gadget placed inside another one. Used to+> -- |construct nested and pop-up gadgets.++> -- |Local: gadgets nested inside another one. Sort of a superclass+> -- |of Inner, but it's not possible to make a pop-up out of them.+> -- |Used to structure gadgets (functionally, not in terms of+> -- |layout).++> -- |Constructor functions are used to create gadgets, which is how+> -- |we pretend we're not dealing with Strings only. In general, for+> -- |a gadget flavour F with signature SF a b, we have:++> -- | fG :: (Show b, Read b) => String -> SF a b -> Gadget a+> -- | textFG :: String -> SF a String -> Gadget a+> -- | fG' :: (b -> String) -> (String -> b) -> SF a b -> Gadget a++> -- |fG uses the built-in Read and Show to perform the conversions+> -- |fStrG uses id for read and show+> -- |fG' allows them to be specified.++> -- |Display gadgets don't need the Read instance (or the+> -- |corresponding function), and Command gadgets don't need either+> -- |instance (so we have commandG but not commandG')++> data Element a = Display (a -> String)+> | Editor (a -> String) (String -> a -> a)+> | Command (a -> a)+> | Chooser (a -> Maybe String)+> (String -> a -> a) (a -> [String])+> | Inner (Gadget a)+> | Local [Gadget a]+++> -- data InnerElement a = forall b. InnerE (a -> b) (b -> a -> a) (Gadget b)++> -- |Returns the name of the gadget. Internally (and+> -- slightly externally), the name of a gadget is a list of Strings+> -- containing the full path from the top to the gadget. This is+> -- converted to a '.'-separated String.++> gadgetName :: Gadget a -> String+> gadgetName = intercalate ['.'] . gFullName++> -- |Create a command gadget++> commandG :: String -> (a -> a) -> Gadget a+> commandG name f = G [name] defaultConfig (Command f)++> -- |Create a display gadget++> displayG :: (Show b) => String -> (a -> b) -> Gadget a+> displayG = displayG' show++> textDisplayG :: String -> (a -> String) -> Gadget a+> textDisplayG = displayG' id++> displayG' :: (b -> String) -> String -> (a -> b) -> Gadget a+> displayG' toString name get = G [name] defaultConfig+> (Display (toString . get))++> -- |editorG allows a gadget to show and edit part of the state.++> editorG' :: (b -> String) -- ^ toString: convert to string+> -> (String -> b) -- ^ fromString: convert from String+> -> String -- ^ gadget name+> -> (a -> b) -- ^ get value from state+> -> (b -> a -> a) -- ^ update state+> -> Gadget a++> editorG' toString fromString name get set =+> G [name] defaultConfig (Editor (toString . get) (set . fromString))++> editorG :: (Show b, Read b) =>+> String -- ^ gadget name+> -> (a -> b) -- ^ get value from state+> -> (b -> a -> a) -- ^ update state+> -> Gadget a++> editorG = editorG' show read++> textEditorG :: String -- ^ gadget name+> -> (a -> String) -- ^ get value from state+> -> (String -> a -> a) -- ^ update state+> -> Gadget a++> textEditorG = editorG' id id++>+> -- |localG does not perform any state transformation directly, but+> -- can be used to structure a gadget tree.++> localG :: String -> [Gadget a] -> Gadget a+> localG name gs = G [name] defaultConfig (Local gs)+++> -- |chooserG++> chooserG' :: (b -> String) -- ^ toString: convert to string+> -> (String -> b) -- ^ fromString: convert from String+> -> String -- ^ the name of the chooser gadget+> -> (a -> Maybe b) -- ^ current selected value+> -> (b -> a -> a) -- ^ update the state with a new value+> -> (a -> [b]) -- ^ list of available choices+> -> Gadget a+> chooserG' toString fromString name get set elems =+> G [name] defaultConfig+> (Chooser (liftM toString . get) (set . fromString)+> (map toString . elems))++> chooserG :: (Read b, Show b) =>+> String -- ^ the name of the chooser gadget+> -> (a -> Maybe b) -- ^ current selected value+> -> (b -> a -> a) -- ^ update the state with a new value+> -> (a -> [b]) -- ^ list of available choices+> -> Gadget a++> chooserG = chooserG' show read+++> textChooserG :: String -- ^ the name of the chooser gadget+> -> (a -> Maybe String) -- ^ current selected value+> -> (String -> a -> a) -- ^ update the state with a new value+> -> (a -> [String]) -- ^ list of available choices+> -> Gadget a++> textChooserG = chooserG' id id++> -- A convenient way to create a choice from a bounded enum.++> enumChooserG :: (Enum b, Read b, Show b) =>+> String+> -> (a -> Maybe b)+> -> (b -> a -> a)+> -> Gadget a+> enumChooserG name get set = chooserG' show read name get set+> (const [toEnum 0 ..])++> innerG :: String -> (a -> b) -> (b -> a -> a) -> Gadget b -> Gadget a+> innerG name get set gadget = G [name] defaultConfig (Inner launch)+> where launch = transform get set gadget++> transform :: (a -> b) -> (b -> a -> a) -> Gadget b -> Gadget a+> transform get set (G name config elmt) =+> G name (transformConfig get config) (transformE get set elmt)++> transformE :: (a -> b) -> (b -> a -> a) -> Element b -> Element a+> transformE get set = xform+> where xform (Display getb) = Display (getb . get)+> xform (Editor getb setb) = Editor (getb . get) (xfset setb)+> xform (Command update) =+> Command (\ st -> set (update (get st)) st)+> xform (Chooser getb setb getvs) =+> Chooser (getb . get) (xfset setb)+> (getvs . get)+> xform (Inner g) = Inner (transform get set g)+> xform (Local gs) = Local (map (transform get set) gs)+> xfset setb = (\ v st -> set (setb v (get st)) st)+++> -- |Gadgets can change their properties based on the value of their state.+> -- Currently, the following configurations are implemented:++> -- dynamicLabel: for write-only gadgets like Command, this can add+> -- some state read functionality. It is interpreted by the+> -- renderer.++> -- enabled: a function on the state returning Bool. If False, the+> -- gadget is disabled in some widget- or renderer-specific way+> -- (e.g. dimmed, hidden).++> addConfig :: (Config a -> Config a) -> Gadget a -> Gadget a+> addConfig f g = g { gConfig = f (gConfig g) }++> enabled :: (a -> Bool) -> Gadget a -> Gadget a+> enabled f = addConfig (enabledCfg f)++> dynamicLabel :: (a -> String) -> Gadget a -> Gadget a+> dynamicLabel f = addConfig (labelConfig f)++> gadgetConfig :: Gadget a -> (Config a -> b) -> b+> gadgetConfig gadget config = config $ gConfig gadget++> gadgetEnabled :: Gadget a -> a -> Bool+> gadgetEnabled g = gadgetConfig g isEnabled++> findGadget :: [String] -> Behaviour a -> Maybe (Gadget a)+> findGadget name (B gs) =+> case filter (match name) gs of+> [] -> Nothing+> g:_ -> Just g+> where match name1 (G name2 _ _) =+> not (null name1) &&+> isPrefixOf (reverse name1) (reverse name2)++> type Fetch a = a -> String+> type Update a = String -> a -> a++> gadgetEditor :: Gadget a -> (Fetch a, Update a)+> gadgetEditor (G _ _ (Editor get set)) = (get, set)+> gadgetEditor (G _ _ (Chooser get set _ )) = (maybe "" id . get, set)+> gadgetEditor g = error $ "Can't connect an editor to gadget '" +++> gadgetName g ++ "'"++> gadgetChooser :: Gadget a -> (a -> [String], Fetch a)+> gadgetChooser (G _ _ (Chooser get _ elems)) = (elems, maybe "" id . get)+> gadgetChooser g = error $ "Can't connect a chooser to gadget '" +++> gadgetName g ++ "'"++> gadgetDisplay :: Gadget a -> Fetch a+> gadgetDisplay (G _ _ (Display get)) = get+> gadgetDisplay (G _ _ (Editor get _)) = get+> gadgetDisplay (G _ _ (Chooser get _ _)) = (maybe "" id . get)+> gadgetDisplay g = error $ "Can't connect a display to gadget '" +++> gadgetName g ++ "'\n" ++ show (abstract g)++> gadgetCommand :: Gadget a -> (a -> a)+> gadgetCommand (G _ _ (Command update)) = update+> gadgetCommand g = error $ "Can't connect a command to gadget '" +++> gadgetName g ++ "'"++> gadgetInner :: Gadget a -> Gadget a+> gadgetInner (G _ _ (Inner g)) = g+> gadgetInner g = error $ "Can't connect a inner to gadget '" +++> gadgetName g ++ "'\n" ++ show (abstract g)+++> connectEditorGadget :: (IO () -> IO ()) -- ^ connection creator+> -> IO a -- ^ gui state retriever+> -> IO String -- ^ gadget value retriever+> -> Maybe (Gadget a) -- ^ optional gadget+> -> (a -> IO ()) -- ^ state change applier+> -> IO ()++> connectEditorGadget onAction getState gadgetValue gadget apply = do+> let connectEditor get set = onAction (do st <- getState+> curr <- gadgetValue+> when (get st /= curr) $ do+> apply $ set curr st)+> case liftM gadgetEditor gadget of+> Nothing -> return ()+> Just (get,set) -> connectEditor get set+++> connectChooserDisplay :: ([String] -> IO ())+> -> (Int -> IO ())+> -> Maybe (Gadget a)+> -> a -> IO ()+> connectChooserDisplay setChoices setValue gadget = do+> let update getChoices get st = (do+> let choices = getChoices st+> value = get st+> setChoices choices+> case elemIndex value choices of+> Nothing -> setValue (-1)+> Just index -> setValue index)+> case liftM gadgetChooser gadget of+> Nothing -> \ _ -> return ()+> Just (getChoices, get) -> update getChoices get++> connectDisplayGadget :: (String -> IO ()) -- GUI element updater+> -> Maybe (Gadget a)+> -> a -> IO ()++> connectDisplayGadget update gadget = do+> let connectDisplay get = update . get+> case liftM gadgetDisplay gadget of+> Nothing -> \ _ -> return ()+> Just get -> connectDisplay get++> connectCommandGadget :: (IO () -> IO ()) -- connection creator+> -> IO a -- state retriever+> -> Maybe (Gadget a)+> -> (a -> IO ()) -- state updater+> -> IO ()+> connectCommandGadget onCommand getState gadget setState = do+> let connectCommand update = onCommand (do st <- getState+> setState (update st))+> case liftM gadgetCommand gadget of+> Nothing -> return ()+> Just update -> connectCommand update++> connectInnerGadget :: (IO () -> IO ()) -- launch connector+> -> (Gadget a -> a -> IO a) -- inner+> -> IO a -- state retriever+> -> Maybe (Gadget a)+> -> (a -> IO ()) -- state updater+> -> IO ()+> connectInnerGadget onLaunch inner getState gadget setState = do+> let connectInner g =+> onLaunch (do st <- getState+> traceMessage $ "connecting: " +++> gadgetName g+> st' <- inner g st+> traceMessage $ "finished: " ++ gadgetName g+> setState st')+> case liftM gadgetInner gadget of+> Nothing -> return ()+> Just g -> connectInner g++> walk :: [String] -> ([String] -> Gadget a -> [b]) -> Gadget a -> [b]+> walk prefix f gadget@(G nm _ e) =+> case e of+> (Local ws) -> f (prefix ++ nm) gadget +++> concatMap (walk (prefix ++ nm) f) ws+> (Inner w) -> f (prefix ++ nm) gadget ++ walk (prefix ++ nm) f w+> _ -> f (prefix ++ nm) gadget+++> abstract :: Gadget a -> [AbstractGadget]+> abstract = walk [] abstractElem+> where abstractElem name e = case gElement e of+> Display _ -> [alabel name]+> Editor _ _ -> [atext name]+> Command _ -> [acommand name]+> Chooser _ _ _ -> [achoice name]+> Inner _ -> [ainner name]+> Local _ -> [alocal name]++> gadgets :: Gadget a -> Behaviour a+> gadgets = B . walk [] getGadget+> where getGadget name (G _ cfg elmt) = [G name cfg elmt]+
+ src/Barrie/Render.lhs view
@@ -0,0 +1,86 @@+> module Barrie.Render where++> import Data.List+> import Data.Maybe++> import Barrie.Gadgets+> import Barrie.Style+> import Barrie.Trace+> import Barrie.Widgets++ RenderF is the type of rendering functions. A rendering+ function should be implmeneted for each backend. Currently,+ we have Gtk and IO.++> type RenderF a b = String -- name of the gui element type+> -> [RunnableGUI a b] -- children of this gui element+> -> Style+> -> Maybe (Gadget b) -- corresponding implementation+> -> Maybe Widget -- possible popup+> -> IO (RunnableGUI a b)++ RunnableGUI is a type representing a rendered set of gadgets,+ widgets, and styles.++ A rendering function retuns a single RunnableGUI, which+ represents the top level gui element. Each of the inner+ elements is also a RunnableGUI, and they are rendered in the+ same way. Anything that can be rendered can be used as a top+ level element, either in the main application, or in a+ pop-up. Of course, this isn't enforced by this module, but+ the RenderF functions should make sure it's true, because we+ rely on it.++ A RunnableGUI contains three fields. First is the GUI, which+ is of a type chosen by the renderer (e.g. Gtk uses+ Gtk.Widget). Second is an update from state function. When+ the state changes, this is called for each widget, causing it+ to display according to the latest state. Finally comes a+ function which, give a function to extract state from IO+ should call when the state is updated, which allows everything+ else to be kept up to date. The final field is a function+ which, given a way of extracting the current state from IO,+ and a way of putting it back, can update it via its gadget+ functionality.++ One will rightly point out that this is all very ugly and+ procedural, but luckily, anybody using Barrie doesn't have to+ worry about it. It's the sewer of side-effects beneath the+ cathedral of functional gui-ness.++> type RunnableGUI gui state =+> (gui, -- the GUI+> state -> IO (), -- update from state+> IO state -> (state -> IO ()) -> IO ()) -- state update function+++ The updates function extracts all the update functions from a+ runnable gui. This is convenient for the implementation of+ renderers.++> updates :: [RunnableGUI gui state] -> [state -> IO ()]+> updates = map (\ (_, update, _) -> update)++ A behaviour is just a flat list of gadgets. Gadgets are defined+ in a hierarchical way, but are flattened for rendering.++ Note that the gadget hierarchy is only tangentially related to the+ widget layout. The hierarchy is intended to be a functional+ grouping, although in practice it will often look similar to the+ widget layout.++> renderWidget :: Behaviour w -> Widget -> RenderF r w+> -> IO (RunnableGUI r w)+> renderWidget behaviour widget render = go widget+> where -- go :: StyleSheet -> Layout -> RunnableGUI r w+> go w = do let elmt = widgetElementName w+> style = widgetStyle w+> gadget = findGadget (uiElementName w) behaviour+> traceMessage ("rendering element: " ++ elmt);+> traceMessage ("ui name = " +++> intercalate "." (uiElementName w))+> traceMessage ("gadget = " +++> maybe "Nothing" (gadgetName) gadget)+> ws <- mapM go $ widgetChildren w+> render elmt ws style gadget (widgetPopupChild w)+
+ src/Barrie/Render/Gtk.lhs view
@@ -0,0 +1,412 @@+This is Barrie's Gtk2hs rendering engine++ See module Barrie.Render for a discussion of the RunnableGUI type,+ which renderers return.++> module Barrie.Render.Gtk (gtkMain, initGtk, renderGtk, runGtk) where++> import qualified Graphics.UI.Gtk as Gtk+> import System.Glib.Attributes++> import Control.Monad++ IORefs are Barrie's dirty little secret. There are three: one+ is for saving a global state that the GUI works with, the other+ two save the contents of lists and choosers, so that we don't+ update them more than necessary.++> import Data.IORef+++ We import approximately everything++> import Barrie.Config+> import Barrie.Render+> import Barrie.Style+> import Barrie.Gadgets+> -- import Barrie.GadgetValue+> -- import Barrie.GadgetValueType+> import Barrie.Trace+> import Barrie.Widgets++ + The rendering model is defined by the RenderF type in the+ Barrie.Render module. Implementations of the renderer provide+ a type which describes the GUI. In this case, it's just a+ Gtk.Widget.++> type GtkGUI = Gtk.Widget++ All rendering functions in this module use the following type+ GtkRenderFn.+ + It is a function from:+ - a list of child guis (i.e. widgets inside the one being rendered)+ - a style+ - an optional gadget, which will be connected to the+ rendered widget if present.+ It returns a runnable GUI.++> type GtkRenderFn a = [RunnableGUI GtkGUI a]+> -> Style+> -> Maybe (Gadget a)+> -> IO (RunnableGUI GtkGUI a)+++ gtkMain is a convenience function for launching a gadget/widget pair,+ with a given state. It should only be called once, at the top level,+ since it initialises Gtk (although I think multiple calls are+ harmless).++> gtkMain :: Gadget a -> Widget -> a -> IO a+> gtkMain gadget widget state = do+> initGtk+> gui <- renderWidget (gadgets gadget) widget renderGtk+> runGtk gui state False+++> initGtk :: IO ()+> initGtk = do Gtk.initGUI+> return ()++> renderGtk :: RenderF GtkGUI a+> renderGtk nm gs style gadget popupChild = do+> let rendererList = case popupChild of+> Nothing -> renderers+> Just w -> map (\ (x,y) -> (x, y w)) popupRenderers+> case lookup nm rendererList of+> Nothing -> error $ "rendering element '" ++ nm ++ "' not found"+> Just r -> do traceMessage ("rendering: " ++ nm)+> r gs style gadget++> runGtk :: RunnableGUI GtkGUI a -> a -> Bool -> IO a+> runGtk (top, start, connect) state modal = do+> stateref <- newIORef state+> let update st = do writeIORef stateref st+> start st+> getState = readIORef stateref+> connect getState update+> startGtk top start state modal+> getState++> startGtk :: Gtk.Widget -> (a -> IO ()) -> a -> Bool -> IO ()+> startGtk top start state modal = do+> Gtk.initGUI+> window <- Gtk.windowNew+> Gtk.windowSetModal window modal+> Gtk.onDestroy window Gtk.mainQuit+> set window [ Gtk.containerChild := top ]+> Gtk.widgetShowAll window+> start state+> Gtk.mainGUI++ -----------------------------+ Renderers and popup renderers+ -----------------------------++ Two kinds of renderers are used. The normal one puts widgets inside+ other widgets in the normal way. The popup renderer instead puts+ widgets into a modal popup. The choice of which to used is made+ based on the popupChild argument to renderGtk, which is taken from+ the widget corresponding to the gadget.++ I find this a bit dodgy, since one could come up with all sorts of+ information that might be useful for a widget to pass to a gadget,+ but we certainly don't want to add an argument for each. If I come+ up with a bunch, I'll change the type from Maybe Widget to a record+ of properties.++> renderers :: [(String, GtkRenderFn a)]+> renderers = [("button", renderButton),+> ("label", renderLabel),+> ("textbox", renderTextBox),+> ("droplist", renderChooser),+> ("list", renderSingleColumnList),+> ("vbox", renderBox Gtk.vBoxNew),+> ("hbox", renderBox Gtk.hBoxNew)]++ Currently, we only do popup buttons, but it should be easily+ generalisable.++> popupRenderers :: [(String, Widget -> GtkRenderFn a)]+> popupRenderers = [("button", renderPopupButton)]++ Tables will come back when I work out a nice way to make them+ dynamic. Yes, boxes should be dynamic too, but there's something+ about tables which just seems to demand it.++ Barrie, of course, is not terribly at ease with dynamic gadgets+ and widgets.++> {-+> renderTable :: GtkRenderFn a+> renderTable ss children widgets = do+> case tableShape children of+> (1, 1) -> head children+> (1, _) -> renderBox Gtk.hBoxNew ss (head children) widgets+> (_, 1) -> renderBox Gtk.vBoxNew ss (map head children) widgets+> (n, m) -> do table <- Gtk.tableNew n m False+> return $ (table,+> startTable table n m ss children widgets,+> updateContainer (Gtk.castToWidget table)+> ss (concat children) widgets)+> -}++> -- |The renderBox function renders horizontal and vertical layout boxes.++> -- |Note the return type: it's a RunnableGUI from module Barrie.Render.++> renderBox :: (Gtk.BoxClass b) =>+> (Bool -> Int -> IO b)+> -> GtkRenderFn a+> renderBox new gs style gadget = do+> box <- new (getHomogenous style) 1+> startBox box gs gadget+> let result = Gtk.castToWidget box+> let connectBox getS update =+> mapM_ (\ (_, _, connect) -> connect getS update) gs+> return $ (result,+> configureWidget box style gadget $ onUpdate result (updates gs),+> connectBox)++> startBox :: (Gtk.BoxClass b) =>+> b+> -> [RunnableGUI GtkGUI a]+> -> Maybe (Gadget a)+> -> IO ()+> startBox box gs _ = do+> mapM_ (\ (w, _, _) -> Gtk.boxPackStartDefaults box w) gs++> onUpdate :: Gtk.Widget -> [a -> IO ()] -> a -> IO ()+> onUpdate _ childUpdates state =+> mapM_ ($ state) childUpdates++> applyStyle :: (a -> IO ()) -> Maybe a -> IO ()+> applyStyle _ Nothing = return ()+> applyStyle applier (Just style) = applier style++> {-+> tableShape :: [[a]] -> (Int, Int)+> tableShape cells = (length cells, length (head cells))++> startTable :: Gtk.Table+> -> StyleSheet -> [RunnableGUI GtkGUI a] -> [TreeWidget a]+> -> a -> IO ()+> startTable table ss children widgets state = do+> let attachCell row col widget =+> Gtk.tableAttachDefaults table widget+> col (col + 1)+> row (row + 1)+> attachRow row cells = mapM_ attach (zip [0 ..] cells)+> where attach (col, (w, _, _)) = attachCell row col w+> attachRows = mapM_ attach (zip [0 ..] children)+> where attach (row, ws) = attachRow row (map (\ (w,_,_) -> w) ws)+> attachRows+> -}++> renderButton :: GtkRenderFn a+> renderButton _ style gadget = do+> btn <- Gtk.buttonNew+> applyStyle (Gtk.buttonSetLabel btn) (getCaption style)+> let onClicked = \ handler -> Gtk.onClicked btn handler >> return ()+> clickUpdate = \ gets -> connectCommandGadget onClicked gets gadget+> return (Gtk.castToWidget btn,+> configureButton btn style gadget (const (return ())),+> clickUpdate)++> renderPopupButton :: Widget -> GtkRenderFn a+> renderPopupButton popup _ style gadget = do+> btn <- Gtk.buttonNew+> applyStyle (Gtk.buttonSetLabel btn) (getCaption style)+> let onClicked = \ handler -> Gtk.onClicked btn handler >> return ()+> inner = \ g st -> do traceMessage ("popup: gadget = " +++> gadgetName g)+> gui <- renderWidget (gadgets g) popup renderGtk+> runGtk gui st True+> clickUpdate = \ gets -> connectInnerGadget onClicked+> inner gets gadget+> return (Gtk.castToWidget btn,+> configureButton btn style gadget (const (return ())),+> clickUpdate)++> configureButton :: Gtk.Button -> Style -> Maybe (Gadget a)+> -> (a -> IO ()) -> a -> IO ()+> configureButton btn style (Just gadget) update state = do+> when (gadgetConfig gadget configHasLabel) $ do+> Gtk.buttonSetLabel btn (gadgetConfig gadget configLabel state)+> configureWidget btn style (Just gadget) update state++> configureButton _ _ _ update state = update state++> configureWidget :: (Gtk.WidgetClass w) =>+> w+> -> Style+> -> Maybe (Gadget a)+> -> (a -> IO ())+> -> a -> IO ()+> configureWidget widget style (Just gadget) update state = do+> let enable = case (gadgetEnabled gadget state, getHideDisabled style) of+> (True, True) -> Gtk.widgetShow+> (False, True) -> Gtk.widgetHide+> (isEnbld, False) -> flip Gtk.widgetSetSensitivity isEnbld+> enable widget+> update state++> configureWidget _ _ _ update state = update state++> renderTextBox :: GtkRenderFn a+> renderTextBox _ style gadget = do+> tb <- Gtk.entryNew+> let onChanged = \ handler -> (Gtk.onEntryActivate tb handler >>+> Gtk.onFocusOut tb (\ _ -> (handler >> return False)) >>+> return ())+> changeUpdate = \ getState ->+> connectEditorGadget onChanged getState+> (Gtk.entryGetText tb)+> gadget+> return (Gtk.castToWidget tb,+> configureWidget tb style gadget $+> connectDisplayGadget (Gtk.entrySetText tb) gadget,+> changeUpdate)++> traceGadget :: Maybe (Gadget a) -> String -> IO ()+> traceGadget Nothing msg = traceMessage $ "<no gadget>: " ++ msg+> traceGadget (Just g) msg = traceMessage $ (gadgetName g) ++ msg++> -- |ModelRender: a record for rendering models.++> data ModelRender = MR { mrSetChoices :: [String] -> IO (),+> mrSetSelection :: Int -> IO (),+> mrGetValue :: IO String+> }++> -- |The function renderModel uses the Gtk combo box/list/tree+> -- |abstraction to do some abstracting of its own.++> -- |Currently, we only render single-column lists. This makes the+> -- |implementation almost trivial. Yay!++> renderSingleColumnModel :: IO (Gtk.ListStore String) -- ^ get model from widget+> -> (IO () -> IO ()) -- ^ selection change handler+> -> IO Int -- ^ current selection from widget+> -> (Int -> IO ()) -- ^ set selection+> -> IO ModelRender+> renderSingleColumnModel getModel onChanged getCursor setCursor = do+> elemsRef <- newIORef []+> let setChoices xs = do+> current <- readIORef elemsRef+> when (current /= xs) $ do+> model <- getModel+> Gtk.listStoreClear model+> mapM_ (Gtk.listStoreAppend model) xs+> writeIORef elemsRef xs+> let getValue = do cursor <- getCursor+> model <- getModel+> if cursor < 0+> then return ""+> else Gtk.listStoreGetValue model cursor+> let setValue n | n < 0 = setCursor n+> | otherwise = setCursor n+> return MR { mrSetChoices = setChoices,+> mrSetSelection = setValue,+> mrGetValue = getValue+> }++> renderChooser :: GtkRenderFn a+> renderChooser _ style gadget = do+> store <- Gtk.listStoreNew []+> chooser <- Gtk.comboBoxNewWithModel store+> r <- Gtk.cellRendererTextNew+> Gtk.cellLayoutPackStart chooser r True+> Gtk.cellLayoutSetAttributes chooser r store $+> \ row -> [ Gtk.cellText := row ]+> let getModel = return store+> onChanged = \ handler -> Gtk.on chooser Gtk.changed handler >> return ()+> getSel = Gtk.comboBoxGetActive chooser+> setSel = Gtk.comboBoxSetActive chooser+> mr <- renderSingleColumnModel getModel onChanged getSel setSel+> let connect = connectChooserDisplay (mrSetChoices mr) (mrSetSelection mr)+> gadget+> update = \getState -> connectEditorGadget onChanged getState+> (mrGetValue mr) gadget+> return (Gtk.castToWidget chooser,+> configureWidget chooser style gadget connect,+> update)++> renderLabel :: GtkRenderFn a+> renderLabel _ style gadget = do+> label <- Gtk.labelNew Nothing+> applyStyle (Gtk.labelSetText label) (getCaption style)+> return (Gtk.castToWidget label,+> connectDisplayGadget (Gtk.labelSetText label) gadget,+> \ _ _ -> return ())++> renderSingleColumnList :: GtkRenderFn a+> renderSingleColumnList children style gadget = do+> store <- Gtk.listStoreNew []+> list <- Gtk.treeViewNewWithModel store+> col <- Gtk.treeViewColumnNew+> r <- Gtk.cellRendererTextNew+> Gtk.cellLayoutPackStart col r True+> Gtk.cellLayoutSetAttributes col r store $ \ row -> [ Gtk.cellText := row ]+> Gtk.treeViewAppendColumn list col+> let getModel = return store+> onChanged = \ handler -> Gtk.onCursorChanged list handler >>+> return ()+> getSel = do (path, _) <- Gtk.treeViewGetCursor list+> case path of+> [] -> return (-1)+> [x] -> return x+> _ -> error $ "can't render tree view "+> setSel n | n < 0 = Gtk.treeViewSetCursor list [] Nothing+> | otherwise = Gtk.treeViewSetCursor list [n] Nothing+> mr <- renderSingleColumnModel getModel onChanged getSel setSel+> let connect = connectChooserDisplay (mrSetChoices mr) (mrSetSelection mr)+> gadget+> update = \getState -> connectEditorGadget onChanged getState+> (mrGetValue mr) gadget+> return (Gtk.castToWidget list,+> configureWidget list style gadget connect,+> update)+++> {- list <- Gtk.treeViewNew+> col <- Gtk.treeViewColumnNew+> Gtk.treeViewAppendColumn list col+> tr <- Gtk.cellRendererTextNew+> Gtk.treeViewColumnPackStart col tr True+> Gtk.treeViewColumnAddAttribute col tr "text" 0+> let onChanged = \ handler -> Gtk.onCursorChanged list handler >>+> return ()+> let getValue rd = do Just store <- Gtk.treeViewGetModel list+> (path, col) <- Gtk.treeViewGetCursor list+> miter <- Gtk.treeModelGetIter store path+> case miter of+> Nothing -> return gvNoValue+> (Just iter) -> do+> (Gtk.GVstring (Just s)) <-+> Gtk.treeModelGetValue store iter 0+> return (rd s)+> return (Gtk.castToWidget list,+> setListChanger (\ m -> Gtk.treeViewSetModel list m) gadget,+> \ getState -> connectTextEditorGadget onChanged getState+> getValue gadget)+> -}++> {- setListChanger :: (Gtk.ListStore -> IO ())+> -> Maybe (Gadget a)+> -> a -> IO ()+> setListChanger update gadget st = connectDisplayGadget update' gadget st+> where update' gv = toListStore gv >>= update+> toListStore gv = case gvType gv of+> (GVList t) ->+> toSingleColumnList t (gvListValues gv)+> _ -> error ("can't display value in a list: " +++> toString gv)+> toSingleColumnList t list = do+> store <- Gtk.listStoreNew [toGtkType t]+> mapM_ (listModelAddRow store) (map (toGtkValue t) list)+> return store+> -}++
+ src/Barrie/Style.lhs view
@@ -0,0 +1,66 @@+> {-# LANGUAGE GeneralizedNewtypeDeriving #-}++> module Barrie.Style (Style, Styled(..), addStyle, emptyStyle,+> caption, getCaption,+> hideDisabled, getHideDisabled,+> homogenous, getHomogenous,+> textValue, textItems) where++> import Data.Monoid++> newtype Style = Style [(String, StyleValue)]+> deriving (Read, Show, Monoid)++> type StyleValue = String++> mkStyle :: String -> StyleValue -> Style+> mkStyle name value = Style [(name, value)]++> class Styled a where+> setStyle :: Style -> a -> a+> getStyle :: a -> Style++> instance Styled Style where+> setStyle = const+> getStyle = id++> addStyle :: (Styled a) => Style -> a -> a+> addStyle style item = setStyle (style `mappend` getStyle item) item++> emptyStyle :: Style+> emptyStyle = Style []++> styleValue :: (Styled a) => String -> a -> Maybe StyleValue+> styleValue name ss = lookup name styleList+> where (Style styleList) = getStyle ss++> caption :: (Styled a) => String -> a -> a+> caption text = addStyle $ mkStyle "caption" text++> getCaption :: (Styled a) => a -> Maybe StyleValue+> getCaption = styleValue "caption"++> textValue :: (Styled a) => String -> a -> a+> textValue text = addStyle $ mkStyle "textValue" text++> textItems :: (Styled a) => [String] -> a -> a+> textItems items = addStyle $ mkStyle "textItems" (unlines items)++> hideDisabled :: (Styled a) => Bool -> a -> a+> hideDisabled hide = addStyle $ mkStyle "hideDisabled" (show hide)++> getHideDisabled :: (Styled a) => a -> Bool+> getHideDisabled style = case styleValue "hideDisabled" style of+> Nothing -> False+> Just text -> read text+++> homogenous :: (Styled a) => Bool -> a -> a+> homogenous set = addStyle $ mkStyle "homogenous" (show set)++> getHomogenous :: (Styled a) => a -> Bool+> getHomogenous style = case styleValue "homogenous" style of+> Nothing -> False+> Just text -> read text++
+ src/Barrie/Trace.lhs view
@@ -0,0 +1,21 @@+Module for enabling trace++> module Barrie.Trace (enableTrace, traceMessage) where++> import Data.IORef+> import System.IO.Unsafe++> traceFile :: IORef (Maybe String)+> traceFile = unsafePerformIO $ newIORef Nothing++> enableTrace :: String -> IO ()+> enableTrace fileName = do+> writeIORef traceFile (Just fileName)++> traceMessage :: String -> IO ()+> traceMessage msg = do+> fileName <- readIORef traceFile+> case fileName of+> Nothing -> return ()+> Just name -> appendFile name (msg ++ "\n")+
+ src/Barrie/Widgets.lhs view
@@ -0,0 +1,102 @@+> module Barrie.Widgets+> (Widget, widgetElementName, widgetToLines, widgetChildren, widgetStyle,+> widgetPopupChild,+> mkWidget, mkPopup,+> ui, ui', uiElementName,+> vbox, hbox, menu, menuItem, button, labelButton, textLabel,+> staticDropList, dropList, list, textBox, textBoxWithValue)+> where++> import Data.List++> import Barrie.Style++> data Widget = Widget { elementName :: String,+> styles :: Style,+> uiName :: [String],+> wpopup :: Maybe Widget,+> children :: [Widget]+> }+> deriving (Read, Show)++> instance Styled Widget where+> getStyle = styles+> setStyle style w = w { styles = style }++> widgetElementName :: Widget -> String+> widgetElementName = elementName++> widgetToLines :: Widget -> [String]+> widgetToLines w = widgetLine : concatMap widgetToLines (children w)+> where widgetLine = elementName w ++ uiLine+> uiLine = case uiName w of+> [] -> ""+> nms -> " (" ++ intercalate "." nms ++ ")"++> widgetChildren :: Widget -> [Widget]+> widgetChildren = children++> widgetStyle :: Widget -> Style+> widgetStyle = styles++> widgetPopupChild :: Widget -> Maybe Widget+> widgetPopupChild = wpopup++> mkWidget :: String -> [Widget] -> Widget+> mkWidget elmtName ws = Widget elmtName emptyStyle [] Nothing ws++> mkPopup :: String -> Widget -> Widget -> Widget+> mkPopup uiname popup w = ui uiname w { wpopup = Just popup }++> ui :: String -> Widget -> Widget+> ui name = ui' [name]++> ui' :: [String] -> Widget -> Widget+> ui' name widget = widget { uiName = name }++> uiElementName :: Widget -> [String]+> uiElementName = uiName++> vbox, hbox :: [Widget] -> Widget+> vbox = mkWidget "vbox"+> hbox = mkWidget "hbox"++> table :: [[Widget]] -> Widget+> table = mkWidget "table" . map tableRow++> tableRow :: [Widget] -> Widget+> tableRow = mkWidget "tr" . map tableCell++> tableCell :: Widget -> Widget+> tableCell = mkWidget "td" . (:[])++> menu :: [Widget] -> Widget+> menu = mkWidget "menu"++> menuItem :: [Widget] -> Widget+> menuItem = mkWidget "menuitem"++> button :: [Widget] -> Widget+> button = mkWidget "button"++> labelButton :: String -> Widget+> labelButton text = caption text (button [])++> textLabel :: String -> Widget+> textLabel text = caption text (mkWidget "label" [])++> staticDropList :: String -> [String] -> Widget+> staticDropList val vals = textValue val $ textItems vals $+> mkWidget "droplist" []++> dropList :: Widget+> dropList = mkWidget "droplist" []++> list :: Widget+> list = mkWidget "list" []++> textBox :: Widget+> textBox = mkWidget "textbox" []++> textBoxWithValue :: String -> Widget+> textBoxWithValue text = textValue text textBox