{- |

Module : $Header$

Copyright : (c) Till Mossakowski and Klaus L�ttich, Uni Bremen 2002-2005

License : similar to LGPL, see HetCATS/LICENSE.txt or LIZENZ.txt

Maintainer : luettich@tzi.de

Stability : provisional

Portability : non-portable (imports Logic)

Utilities on top of HTk

-}

module GUI.HTkUtils where

import System.Directory

import HTk

import Core

import ScrollBox

import TextDisplay

import FileDialog

-- only to avoid problematic ghc 6.2.1 compilation order

import Common.Lib.Rel()

-- | create a window with title and list of options, return selected option

listBox :: String -> [String] -> IO (Maybe Int)

listBox title entries =

do

main <- createToplevel [text title]

lb <- newListBox main [value entries, bg "white", size (100, 50)] ::

IO (ListBox String)

pack lb [Side AtLeft,

Expand On, Fill Both]

scb <- newScrollBar main []

pack scb [Side AtRight, Fill Y]

lb # scrollbar Vertical scb

(press, _) <- bindSimple lb (ButtonPress (Just 1))

sync press

sel <- getSelection lb

destroy main

return (case sel of

Just [i] -> Just i

_ -> Nothing)

-- |

-- Display some (longish) text in an uneditable, scrollable editor.

-- Returns immediately-- the display is forked off to separate thread.

createTextSaveDisplayExt :: String -- ^ title of the window

-> String -- ^ default filename for saving the text

-> String -- ^ text to be displayed

-> [Config Editor] -- ^ configuration options for

-- the text editor

-> IO() -- ^ action to be executed when

-- the window is closed

-> IO (Toplevel,Editor) -- ^ the window in which

-- the text is displayed

createTextSaveDisplayExt title filename txt conf unpost =

do win <- createToplevel [text title]

b <- newFrame win [relief Groove, borderwidth (cm 0.05)]

t <- newLabel b [text title, HTk.font (Helvetica, Roman, 18::Int)]

q <- newButton b [text "Close", width 12]

s <- newButton b [text "Save", width 12]

(sb, ed) <- newScrollBox b (\p-> newEditor p (state Normal:conf)) []

pack b [Side AtTop, Fill X, Expand On]

pack t [Side AtTop, Expand Off, PadY 10]

pack sb [Side AtTop, Expand On]

pack ed [Side AtTop, Expand On, Fill X]

pack q [Side AtRight, PadX 5, PadY 5]

pack s [Side AtLeft, PadX 5, PadY 5]

ed # value txt

ed # state Disabled

quit <- clicked q

save <- clicked s

spawnEvent (forever (quit >>> do destroy win; unpost

+>

save >>> do disableButs q s

askFileNameAndSave filename txt

enableButs q s

done))

return (win, ed)

where disableButs b1 b2 = do disable b1

disable b2

enableButs b1 b2 = do enable b1

enable b2

-- |

-- Display some (longish) text in an uneditable, scrollable editor.

-- Simplified version of createTextSaveDisplayExt

createTextSaveDisplay :: String -- ^ title of the window

-> String -- ^ default filename for saving the text

-> String -- ^ text to be displayed

-> IO()

createTextSaveDisplay t f txt =

do createTextSaveDisplayExt t f txt [size(100,50)] done; done

--- added by KL

-- |

-- opens a FileDialog and saves to the selected file if OK is clicked

-- otherwise nothing happens

askFileNameAndSave :: String -- ^ default filename for saving the text

-> String -- ^ text to be saved

-> IO ()

askFileNameAndSave defFN txt =

do curDir <- getCurrentDirectory

selev <- newFileDialogStr "Save file" (curDir++'/':defFN)

mfile <- sync selev

maybe done saveFile mfile

where saveFile fp = writeFile fp txt