MVP

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "imgui"]
 	path = imgui
 	url = https://github.com/ocornut/imgui
+[submodule "implot"]
+	path = implot
+	url = https://github.com/epezent/implot.git

dear-imgui.cabal

@@ -22,7 +22,9 @@ extra-source-files:
   imgui/backends/*.h,
   imgui/backends/*.mm,
   imgui/imconfig.h,
-  imgui/LICENSE.txt
+  imgui/LICENSE.txt,
+  implot/*.h,
+  implot/LICENSE
 
 common exe-flags
   if flag(debug)
@@ -140,6 +142,7 @@ library
   exposed-modules:
     DearImGui
     DearImGui.FontAtlas
+    DearImGui.Plot
     DearImGui.Raw
     DearImGui.Raw.DrawList
     DearImGui.Raw.Font
@@ -147,6 +150,7 @@ library
     DearImGui.Raw.Font.GlyphRanges
     DearImGui.Raw.ListClipper
     DearImGui.Raw.IO
+    DearImGui.Raw.Plot
   other-modules:
     DearImGui.Context
     DearImGui.Enums
@@ -158,10 +162,14 @@ library
     imgui/imgui_draw.cpp
     imgui/imgui_tables.cpp
     imgui/imgui_widgets.cpp
+    implot/implot.cpp
+    implot/implot_demo.cpp
+    implot/implot_items.cpp
   extra-libraries:
     stdc++
   include-dirs:
     imgui
+    implot
   build-depends:
       dear-imgui-generator
     , containers

generator/DearImGui/Generator.hs

@@ -74,9 +74,15 @@ headers = $( do
   basicHeaders <- TH.runIO do
     headersPath  <- canonicalizePath ( takeDirectory currentPath <> "/../../imgui/imgui.h" )
     headersSource <- Text.readFile headersPath
-    tokens <- case tokenise headersSource of
+    tokensImGui <- case tokenise headersSource of
       Left  err  -> error ( "Couldn't tokenise Dear ImGui headers:\n\n" <> show err )
       Right toks -> pure toks
+    headersPath  <- canonicalizePath ( takeDirectory currentPath <> "/../../implot/implot.h" )
+    headersSource <- Text.readFile headersPath
+    tokensImPlot <- case tokenise headersSource of
+      Left  err  -> error ( "Couldn't tokenise Dear ImPlot headers:\n\n" <> show err )
+      Right toks -> pure toks
+    let tokens = tokensImGui<>tokensImPlot
     case Megaparsec.parse Parser.headers "" tokens of
       Left  err -> do
         let

src/DearImGui.hs

@@ -294,6 +294,9 @@ module DearImGui
   , Raw.getForegroundDrawList
   , Raw.imCol32
 
+    -- * Plotting
+  , module DearImGui.Plot
+
     -- * Types
   , module DearImGui.Enums
   , module DearImGui.Structs
@@ -315,6 +318,7 @@ import System.IO
 -- dear-imgui
 import DearImGui.Enums
 import DearImGui.Structs
+import DearImGui.Plot
 import qualified DearImGui.Raw as Raw
 import qualified DearImGui.Raw.Font as Raw.Font
 import qualified DearImGui.Raw.ListClipper as Raw.ListClipper

src/DearImGui/Context.hs

@@ -43,3 +43,11 @@ imguiContext = mempty
       , ( TypeName "ImGuiListClipper", [t| ImGuiListClipper |] )
       ]
   }
+
+implotContext :: Context
+implotContext = mempty
+  { ctxTypesTable =
+    Map.fromList
+      [ ( TypeName "ImPlotContext", [t| ImPlotContext |] )
+      ]
+  }

src/DearImGui/Plot.hs

@@ -0,0 +1,71 @@
+{-# LANGUAGE BlockArguments #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE PatternSynonyms #-}
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE TemplateHaskell #-}
+
+{-|
+Module: DearImGui.Plot
+
+Main ImPlot module, exporting the functions to make plots happen in Gui.
+-}
+
+module DearImGui.Plot
+  ( -- * Context Creation and Access
+    Raw.Plot.PlotContext(..)
+  , Raw.Plot.createPlotContext
+  , Raw.Plot.destroyPlotContext
+  , Raw.Plot.getCurrentPlotContext
+  , Raw.Plot.setCurrentPlotContext
+
+    -- * Demo so you can play with all features
+  , Raw.Plot.showPlotDemoWindow
+  )
+  where
+
+-- base
+import Control.Monad
+  ( when )
+import Data.Bool
+import Data.Foldable
+  ( foldl' )
+import Foreign
+import Foreign.C
+import qualified GHC.Foreign as Foreign
+import System.IO
+  ( utf8 )
+
+-- dear-imgui
+import DearImGui.Enums
+import DearImGui.Structs
+import qualified DearImGui.Raw as Raw
+import qualified DearImGui.Raw.Plot as Raw.Plot
+import qualified DearImGui.Raw.Font as Raw.Font
+import qualified DearImGui.Raw.ListClipper as Raw.ListClipper
+
+-- managed
+import qualified Control.Monad.Managed as Managed
+
+-- StateVar
+import Data.StateVar
+  ( HasGetter(get), HasSetter, ($=!) )
+
+-- transformers
+import Control.Monad.IO.Class
+  ( MonadIO, liftIO )
+
+-- unliftio
+import UnliftIO (MonadUnliftIO)
+import UnliftIO.Exception (bracket, bracket_)
+
+-- vector
+import qualified Data.Vector as V
+import qualified Data.Vector.Storable as VS
+import qualified Data.Vector.Unboxed as VU
+

src/DearImGui/Raw/Plot.hs

@@ -0,0 +1,83 @@
+{-# LANGUAGE BlockArguments #-}
+{-# LANGUAGE DuplicateRecordFields #-}
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE NamedFieldPuns #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE PatternSynonyms #-}
+{-# LANGUAGE QuasiQuotes #-}
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE ViewPatterns #-}
+
+{-|
+Module: DearImGui.Raw.Plot
+
+Main ImPlot Raw module.
+-}
+module DearImGui.Raw.Plot 
+  ( PlotContext(..)
+  , createPlotContext
+  , destroyPlotContext
+  , getCurrentPlotContext
+  , setCurrentPlotContext
+
+  , showPlotDemoWindow
+  ) where
+
+-- base
+import Control.Monad.IO.Class
+  ( MonadIO, liftIO )
+import Foreign
+import Foreign.C
+import System.IO.Unsafe
+  ( unsafePerformIO )
+
+-- dear-imgui
+import DearImGui.Context
+  ( imguiContext, implotContext )
+import DearImGui.Enums
+import DearImGui.Structs
+import DearImGui.Raw.DrawList (DrawList(..))
+
+-- inline-c
+import qualified Language.C.Inline as C
+
+-- inline-c-cpp
+import qualified Language.C.Inline.Cpp as Cpp
+
+C.context (Cpp.cppCtx <> C.bsCtx <> imguiContext <> implotContext)
+C.include "imgui.h"
+C.include "implot.h"
+Cpp.using "namespace ImPlot"
+
+
+-- | Wraps @ImPlotContext*@.
+newtype PlotContext = PlotContext (Ptr ImPlotContext)
+
+
+-- | Wraps @ImPlot::CreateContext()@.
+createPlotContext :: (MonadIO m) => m PlotContext
+createPlotContext = liftIO do
+  PlotContext <$> [C.exp| ImPlotContext* { CreateContext() } |]
+
+-- | Wraps @ImPlot::DestroyPlotContext()@.
+destroyPlotContext :: (MonadIO m) => PlotContext -> m ()
+destroyPlotContext (PlotContext contextPtr) = liftIO do
+  [C.exp| void { DestroyContext($(ImPlotContext* contextPtr)); } |]
+
+-- | Wraps @ImPlot::GetCurrentPlotContext()@.
+getCurrentPlotContext :: MonadIO m => m PlotContext
+getCurrentPlotContext = liftIO do
+  PlotContext <$> [C.exp| ImPlotContext* { GetCurrentContext() } |]
+
+
+-- | Wraps @ImPlot::SetCurrentPlotContext()@.
+setCurrentPlotContext :: MonadIO m => PlotContext -> m ()
+setCurrentPlotContext (PlotContext contextPtr) = liftIO do
+  [C.exp| void { SetCurrentContext($(ImPlotContext* contextPtr)) } |]
+
+-- | Create demo window. Demonstrate most ImGui features. Call this to learn
+-- about the library! Try to make it always available in your application!
+showPlotDemoWindow :: (MonadIO m) => m ()
+showPlotDemoWindow = liftIO do
+  [C.exp| void { ShowDemoWindow(); } |]

src/DearImGui/Structs.hs

@@ -107,3 +107,23 @@ type ImWchar = Word32
 #else
 type ImWchar = Word16
 #endif
+
+--------------------------------------------------------------------------------
+
+-- | DearImPlot context handle
+data ImPlotContext
+
+-- |  Double precision version of ImVec2 used by ImPlot. Extensible by end users
+data ImPlotPoint
+
+-- | Range defined by a min/max value.
+data ImPlotRange
+
+-- | Combination of two range limits for X and Y axes. Also an AABB defined by Min()/Max().
+data ImPlotRect
+
+-- | Plot style structure
+data ImPlotStyle
+
+-- | Input mapping structure. Default values listed. See also MapInputDefault, MapInputReverse.
+data ImPlotInputMap