mirror of
https://gitlab.com/sheaf/metabrush.git
synced 2024-11-05 23:03:38 +00:00
1e4bb4bddc
* each stroke stores the brushes it uses by reference,
so that one can interactively edit brushes
and see the strokes be updated in real-time
* when writing to a file, we retrive the brush code
from the reference, and include that information statically
464 lines
14 KiB
Haskell
464 lines
14 KiB
Haskell
{-# LANGUAGE BlockArguments #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE NegativeLiterals #-}
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{-# LANGUAGE OverloadedLabels #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE RecursiveDo #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TypeApplications #-}
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{-# LANGUAGE TypeOperators #-}
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module Main
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( main )
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where
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-- base
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import Control.Monad
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( void )
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import Data.Foldable
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( for_ )
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import Data.Function
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( (&) )
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import Data.Int
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( Int32 )
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import System.Exit
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( exitSuccess )
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import GHC.Conc
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( getNumProcessors, setNumCapabilities )
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-- containers
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import Data.Map.Strict
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( Map )
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import qualified Data.Map.Strict as Map
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( adjust, empty )
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import qualified Data.Sequence as Seq
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( fromList )
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import Data.Set
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( Set )
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import qualified Data.Set as Set
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( empty )
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-- directory
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import qualified System.Directory as Directory
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( canonicalizePath )
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-- generic-lens
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import Data.Generics.Product.Fields
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( field' )
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-- gi-cairo-render
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import qualified GI.Cairo.Render as Cairo
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( Render )
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-- gi-cairo-connector
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import qualified GI.Cairo.Render.Connector as Cairo
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( renderWithContext )
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-- gi-gdk
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import qualified GI.Gdk as GDK
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-- gi-gtk
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import qualified GI.Gtk as GTK
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-- lens
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import Control.Lens
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( (.~), set )
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import Control.Lens.At
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( at )
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-- stm
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import qualified Control.Concurrent.STM as STM
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( atomically )
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import qualified Control.Concurrent.STM.TVar as STM
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( modifyTVar', newTVarIO, readTVar )
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-- superrecord
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import qualified SuperRecord as Super
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( Rec )
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import qualified SuperRecord
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( (:=)(..), (&), rnil )
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-- text
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import qualified Data.Text as Text
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( pack )
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-- transformers
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import Control.Monad.Trans.Reader
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( runReaderT )
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-- unordered-containers
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import Data.HashMap.Strict
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( HashMap )
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import qualified Data.HashMap.Strict as HashMap
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( fromList )
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-- MetaBrush
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import Math.Bezier.Cubic.Fit
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( FitParameters(..) )
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import Math.Bezier.Spline
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( Spline(..), Curves(..), Curve(..), NextPoint(..) )
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import Math.Bezier.Stroke
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( CachedStroke(..) )
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import Math.Vector2D
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( Point2D(..) )
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import MetaBrush.Action
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( ActionOrigin(..) )
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import qualified MetaBrush.Asset.Brushes as Asset.Brushes
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( circle )
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import MetaBrush.Asset.Colours
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( getColours )
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import MetaBrush.Asset.Logo
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( drawLogo )
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import MetaBrush.Brush
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( Brush, newBrushReference )
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import MetaBrush.Context
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( UIElements(..), Variables(..)
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, Modifier(..)
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, HoldAction(..), PartialPath(..)
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)
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import MetaBrush.Document
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( Document(..), emptyDocument
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, Stroke(..), FocusState(..)
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, PointData(..)
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)
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import MetaBrush.Document.History
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( DocumentHistory(..), newHistory )
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import MetaBrush.Document.Update
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( activeDocument, withActiveDocument )
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import MetaBrush.Event
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( handleEvents )
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import MetaBrush.Render.Document
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( renderDocument, blankRender )
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import MetaBrush.Render.Rulers
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( renderRuler )
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import MetaBrush.UI.FileBar
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( FileBar(..), createFileBar )
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import MetaBrush.UI.InfoBar
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( InfoBar(..), createInfoBar, updateInfoBar )
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import MetaBrush.UI.Menu
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( createMenuBar )
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import MetaBrush.UI.Panels
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( createPanelBar )
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import MetaBrush.UI.ToolBar
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( Tool(..), Mode(..), createToolBar )
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import MetaBrush.UI.Viewport
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( Viewport(..), Ruler(..), createViewport )
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import MetaBrush.Unique
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( newUniqueSupply
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, Unique, freshUnique
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, uniqueMapFromList
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)
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import MetaBrush.Util
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( widgetAddClass, widgetAddClasses )
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import qualified Paths_MetaBrush as Cabal
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( getDataFileName )
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--------------------------------------------------------------------------------
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main :: IO ()
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main = do
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procs <- getNumProcessors
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let
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caps :: Int
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caps
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| procs >= 6
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= procs - 2
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| procs >= 2
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= procs - 1
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| otherwise
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= procs
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setNumCapabilities caps
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---------------------------------------------------------
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-- Initialise state
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uniqueSupply <- newUniqueSupply
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circleBrush <- Asset.Brushes.circle uniqueSupply
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circleBrushUnique <- runReaderT freshUnique uniqueSupply
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docUnique <- runReaderT freshUnique uniqueSupply
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strokeUnique <- runReaderT freshUnique uniqueSupply
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let
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testBrushes :: HashMap Brush Unique
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testBrushes = HashMap.fromList
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[ ( circleBrush, circleBrushUnique ) ]
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testDocuments :: Map Unique DocumentHistory
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testDocuments = fmap newHistory $ uniqueMapFromList
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[ emptyDocument "Test" docUnique
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& ( field' @"documentContent" . field' @"strokes" ) .~
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[ Stroke
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{ strokeName = "Stroke 1"
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, strokeVisible = True
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, strokeUnique = strokeUnique
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, strokeBrushRef = newBrushReference @'[ "r" SuperRecord.:= Double ] circleBrushUnique
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, strokeSpline =
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Spline
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{ splineStart = mkPoint ( Point2D 10 -20 ) 2
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, splineCurves = OpenCurves $ Seq.fromList
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[ LineTo { curveEnd = NextPoint ( mkPoint ( Point2D 10 10 ) 5 ), curveData = CachedStroke Nothing }
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, LineTo { curveEnd = NextPoint ( mkPoint ( Point2D -10 10 ) 5 ), curveData = CachedStroke Nothing }
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, LineTo { curveEnd = NextPoint ( mkPoint ( Point2D -10 -20 ) 2 ), curveData = CachedStroke Nothing }
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]
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}
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}
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]
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& ( field' @"documentBrushes" . at circleBrushUnique ) .~ ( Just circleBrush )
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]
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where
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mkPoint :: Point2D Double -> Double -> PointData ( Super.Rec '[ "r" SuperRecord.:= Double ] )
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mkPoint pt r = PointData pt Normal ( #r SuperRecord.:= r SuperRecord.& SuperRecord.rnil )
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activeDocumentTVar <- STM.newTVarIO @( Maybe Unique ) Nothing
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openDocumentsTVar <- STM.newTVarIO @( Map Unique DocumentHistory ) testDocuments
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brushesTVar <- STM.newTVarIO @( HashMap Brush Unique ) testBrushes
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mousePosTVar <- STM.newTVarIO @( Maybe ( Point2D Double ) ) Nothing
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mouseHoldTVar <- STM.newTVarIO @( Maybe HoldAction ) Nothing
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modifiersTVar <- STM.newTVarIO @( Set Modifier ) Set.empty
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toolTVar <- STM.newTVarIO @Tool Selection
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modeTVar <- STM.newTVarIO @Mode PathMode
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debugTVar <- STM.newTVarIO @Bool False
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partialPathTVar <- STM.newTVarIO @( Maybe PartialPath ) Nothing
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fileBarTabsTVar <- STM.newTVarIO @( Map Unique ( GTK.Box, GTK.RadioButton ) ) Map.empty
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showGuidesTVar <- STM.newTVarIO @Bool True
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maxHistorySizeTVar <- STM.newTVarIO @Int 1000
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fitParametersTVar <- STM.newTVarIO @FitParameters
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( FitParameters
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{ maxSubdiv = 6
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, nbSegments = 12
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, dist_tol = 5e-3
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, t_tol = 1e-4
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, maxIters = 100
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}
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)
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-- Put all these stateful variables in a record for conciseness.
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let
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variables :: Variables
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variables = Variables {..}
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---------------------------------------------------------
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-- Initialise GTK
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void $ GTK.init Nothing
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Just screen <- GDK.screenGetDefault
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themePath <- Text.pack <$> ( Directory.canonicalizePath =<< Cabal.getDataFileName "theme.css" )
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cssProvider <- GTK.cssProviderNew
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GTK.cssProviderLoadFromPath cssProvider themePath
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GTK.styleContextAddProviderForScreen screen cssProvider 1000
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window <- GTK.windowNew GTK.WindowTypeToplevel
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windowWidgetPath <- GTK.widgetGetPath window
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widgetAddClass window "window"
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GTK.setWindowResizable window True
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GTK.setWindowDecorated window False
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GTK.setWindowTitle window "MetaBrush"
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GTK.windowSetDefaultSize window 1024 768
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GTK.widgetAddEvents window
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[ GDK.EventMaskKeyPressMask, GDK.EventMaskKeyReleaseMask ]
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let
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baseMinWidth, baseMinHeight :: Int32
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baseMinWidth = 480
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baseMinHeight = 240
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windowGeometry <- GDK.newZeroGeometry
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GDK.setGeometryMinWidth windowGeometry baseMinWidth
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GDK.setGeometryMinHeight windowGeometry baseMinHeight
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GTK.windowSetGeometryHints window ( Nothing @GTK.Widget )
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( Just windowGeometry )
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[ GDK.WindowHintsMinSize ]
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iconPath <- Directory.canonicalizePath =<< Cabal.getDataFileName "icon.png"
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GTK.windowSetIconFromFile window iconPath
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colours <- getColours windowWidgetPath
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---------------------------------------------------------
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-- Create base UI elements
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baseOverlay <- GTK.overlayNew
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GTK.setContainerChild window baseOverlay
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uiGrid <- GTK.gridNew
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GTK.setContainerChild baseOverlay uiGrid
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logo <- GTK.boxNew GTK.OrientationVertical 0
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titleBar <- GTK.boxNew GTK.OrientationHorizontal 0
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toolBar <- GTK.boxNew GTK.OrientationVertical 0
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mainPane <- GTK.panedNew GTK.OrientationHorizontal
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panelBox <- GTK.boxNew GTK.OrientationVertical 0
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GTK.gridAttach uiGrid logo 0 0 1 2
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GTK.gridAttach uiGrid titleBar 1 0 2 1
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GTK.gridAttach uiGrid toolBar 0 2 2 1
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GTK.gridAttach uiGrid mainPane 2 2 1 1
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mainView <- GTK.boxNew GTK.OrientationVertical 0
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GTK.panedPack1 mainPane mainView True False
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GTK.panedPack2 mainPane panelBox False False
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viewportGrid <- GTK.gridNew
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---------------------------------------------------------
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-- Background
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widgetAddClass uiGrid "bg"
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---------------------------------------------------------
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-- Title bar
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widgetAddClass titleBar "titleBar"
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--------
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-- Logo
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widgetAddClass logo "logo"
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logoArea <- GTK.drawingAreaNew
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GTK.boxPackStart logo logoArea True True 0
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void $ GTK.onWidgetDraw logoArea
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$ Cairo.renderWithContext ( drawLogo colours )
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------------
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-- Title
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title <- GTK.labelNew ( Just "MetaBrush" )
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widgetAddClasses title [ "text", "title", "plain" ]
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GTK.boxSetCenterWidget titleBar ( Just title )
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---------------------------------------------------------
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-- Main viewport
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viewport@( Viewport {..} ) <- createViewport viewportGrid
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-----------------
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-- Viewport rendering
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void $ GTK.onWidgetDraw viewportDrawingArea \ ctx -> do
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-- Get the relevant document information
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viewportWidth <- GTK.widgetGetAllocatedWidth viewportDrawingArea
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viewportHeight <- GTK.widgetGetAllocatedHeight viewportDrawingArea
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mbDocAndRender <- STM.atomically $ withActiveDocument variables \ doc -> do
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modifiers <- STM.readTVar modifiersTVar
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mbMousePos <- STM.readTVar mousePosTVar
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mbHoldAction <- STM.readTVar mouseHoldTVar
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mbPartialPath <- STM.readTVar partialPathTVar
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mode <- STM.readTVar modeTVar
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debug <- STM.readTVar debugTVar
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showGuides <- STM.readTVar showGuidesTVar
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fitParameters <- STM.readTVar fitParametersTVar
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let
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mbUpdatedDoc :: Maybe Document
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renderDoc, renderAction :: Cairo.Render ()
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( mbUpdatedDoc, renderDoc ) =
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renderDocument
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colours fitParameters mode debug ( viewportWidth, viewportHeight )
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modifiers mbMousePos mbHoldAction mbPartialPath
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doc
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renderAction = do
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renderDoc
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renderRuler
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colours ( viewportWidth, viewportHeight ) ViewportOrigin ( viewportWidth, viewportHeight )
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mbMousePos mbHoldAction showGuides
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doc
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pure
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( mbUpdatedDoc, renderAction )
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case mbDocAndRender of
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Just ( mbNewDoc, render ) -> do
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Cairo.renderWithContext render ctx
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for_ mbNewDoc \ newDoc -> STM.atomically do
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mbCurrDocUnique <- STM.readTVar activeDocumentTVar
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for_ mbCurrDocUnique \ currDocUnique -> do
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STM.modifyTVar' openDocumentsTVar ( Map.adjust ( set ( field' @"present" ) newDoc ) currDocUnique )
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Nothing ->
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Cairo.renderWithContext ( blankRender colours ) ctx
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pure True
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for_ [ ( rulerCornerDrawingArea, RulerCorner )
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, ( topRulerDrawingArea, TopRuler )
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, ( leftRulerDrawingArea, LeftRuler
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) ] \ ( rulerDrawingArea, ruler ) -> do
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void $ GTK.onWidgetDraw rulerDrawingArea \ ctx -> do
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viewportWidth <- GTK.widgetGetAllocatedWidth viewportDrawingArea
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viewportHeight <- GTK.widgetGetAllocatedHeight viewportDrawingArea
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width <- GTK.widgetGetAllocatedWidth rulerDrawingArea
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height <- GTK.widgetGetAllocatedHeight rulerDrawingArea
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mbRender <- STM.atomically $ withActiveDocument variables \ doc -> do
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mbMousePos <- STM.readTVar mousePosTVar
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mbHoldAction <- STM.readTVar mouseHoldTVar
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showGuides <- STM.readTVar showGuidesTVar
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pure do
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renderRuler
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colours ( viewportWidth, viewportHeight ) ( RulerOrigin ruler ) ( width, height )
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mbMousePos mbHoldAction showGuides
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doc
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for_ mbRender \ render -> Cairo.renderWithContext render ctx
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pure True
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---------------------------------------------------------
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-- Tool bar
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_ <- createToolBar variables colours viewportDrawingArea toolBar
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---------------------------------------------------------
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-- Info bar
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infoBar@( InfoBar { infoBarArea } ) <- createInfoBar colours
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rec
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---------------------------------------------------------
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-- File bar
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fileBar@( FileBar { fileBarBox } ) <-
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createFileBar
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colours
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variables
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window titleBar title viewport infoBar menu
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------------
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-- Menu bar
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let
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uiElements :: UIElements
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uiElements = UIElements { menu, fileBar, .. }
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menu <- createMenuBar uiElements variables colours
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GTK.boxPackStart mainView fileBarBox False False 0
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GTK.boxPackStart mainView viewportGrid True True 0
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GTK.boxPackStart mainView infoBarArea False False 0
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---------------------------------------------------------
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-- Panels
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createPanelBar panelBox
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---------------------------------------------------------
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-- Actions
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handleEvents uiElements variables
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---------------------------------------------------------
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-- GTK main loop
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GTK.widgetShowAll window
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mbDoc <- fmap present <$> ( STM.atomically $ activeDocument variables )
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updateInfoBar viewportDrawingArea infoBar variables mbDoc -- need to update the info bar after widgets have been realized
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GTK.main
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exitSuccess
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