gtksourceview3-0.12.5.0: demo/SourceView.hs

-- Test file for the SourceView widget.
module Main where

import Graphics.UI.Gtk
import Graphics.UI.Gtk.SourceView

main = do
  initGUI
  win <- windowNew
  windowSetPosition win WinPosCenter
  win `onDestroy` mainQuit

  -- create the appropriate language
  lm <- sourceLanguageManagerNew
  langM <- sourceLanguageManagerGetLanguage lm "haskell"
  lang <- case langM of
    (Just lang) -> return lang
    Nothing -> do
      langDirs <- sourceLanguageManagerGetSearchPath lm
      error ("please copy haskell.lang to one of the following directories:\n"
        ++unlines langDirs)

  -- create a new SourceBuffer object
  buffer <- sourceBufferNewWithLanguage lang

  -- load up and display a file
  fileContents <- readFile "SourceView.hs"
  textBufferSetText buffer fileContents
  textBufferSetModified buffer False

  sourceBufferSetHighlightSyntax buffer True

  -- create a new SourceView Widget
  sv <- sourceViewNewWithBuffer buffer

  -- put it in a scrolled window
  sw <- scrolledWindowNew Nothing Nothing
  sw `containerAdd` sv
  scrolledWindowSetPolicy sw PolicyAutomatic PolicyAutomatic
  sw `scrolledWindowSetShadowType` ShadowIn
  win `containerAdd` sw

  -- show the widget and run the main loop
  windowSetDefaultSize win 400 500
  widgetShowAll win
  mainGUI