mirror of
https://github.com/Drezil/dear-imgui.hs.git
synced 2024-11-22 08:56:59 +00:00
121 lines
2.5 KiB
Haskell
121 lines
2.5 KiB
Haskell
{-# LANGUAGE BlockArguments #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE OverloadedStrings #-}
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module Main (main) where
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import Data.IORef
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import DearImGui
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import DearImGui.OpenGL
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import DearImGui.SDL
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import DearImGui.SDL.OpenGL
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import Control.Exception
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import Graphics.GL
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import SDL
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main :: IO ()
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main = do
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initializeAll
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bracket (createWindow "Hello, Dear ImGui!" defaultWindow { windowGraphicsContext = OpenGLContext defaultOpenGL }) destroyWindow \w ->
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bracket (glCreateContext w) glDeleteContext \glContext ->
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bracket createContext destroyContext \_imguiContext ->
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bracket_ (sdl2InitForOpenGL w glContext) sdl2Shutdown $
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bracket_ openGL2Init openGL2Shutdown do
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checkVersion
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styleColorsLight
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newIORef False >>= loop w
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openGL2Shutdown
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loop :: Window -> IORef Bool -> IO ()
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loop w checked = do
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quit <- pollEvents
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openGL2NewFrame
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sdl2NewFrame w
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newFrame
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-- showDemoWindow
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-- showMetricsWindow
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-- showAboutWindow
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-- showUserGuide
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begin "My Window"
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text "Hello!"
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button "Click me" >>= \case
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True -> openPopup "Button Popup"
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False -> return ()
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isItemHovered >>= whenTrue do
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beginTooltip
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text "Tooltip?"
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endTooltip
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beginPopup "Button Popup" >>= whenTrue do
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button "Close" >>= whenTrue closeCurrentPopup
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endPopup
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sameLine >> smallButton "Click me" >>= \case
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True -> putStrLn "Oh hi Mark"
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False -> return ()
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sameLine >> arrowButton "Arrow" ImGuiDirUp
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sameLine >> checkbox "Check!" checked >>= \case
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True -> readIORef checked >>= print
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False -> return ()
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separator
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progressBar 0.314 (Just "Pi")
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beginCombo "Label" "Preview" >>= whenTrue do
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selectable "Testing 1"
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selectable "Testing 2"
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endCombo
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beginMainMenuBar >>= whenTrue do
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beginMenu "Hello" >>= whenTrue do
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menuItem "Hello"
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endMenu
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beginMenu "World" >>= whenTrue do
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menuItem "World"
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endMenu
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endMainMenuBar
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end
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render
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glClear GL_COLOR_BUFFER_BIT
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openGL2RenderDrawData =<< getDrawData
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glSwapWindow w
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if quit then return () else loop w checked
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where
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pollEvents = do
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ev <- pollEventWithImGui
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case ev of
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Nothing -> return False
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Just Event{ eventPayload } -> do
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let isQuit = case eventPayload of
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QuitEvent -> True
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_ -> False
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(isQuit ||) <$> pollEvents
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whenTrue :: IO () -> Bool -> IO ()
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whenTrue io True = io
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whenTrue io False = return ()
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