wxhaskell

问题 Env: OS: feodra 16 haskell-platform wxGTK-devel ghc 7.0.4 I am trying to install wxHaskell with cabal install wx Then these errors are given. Missing dependencies on foreign libraries: * Missing C libraries: wx_baseu-2.8, wx_baseu_net-2.8, wx_baseu_xml-2.8, wx_gtk2u_core-2.8, wx_gtk2u_adv-2.8, wx_gtk2u_html-2.8, wx_gtk2u_qa-2.8, wx_gtk2u_xrc-2.8, wx_gtk2u_aui-2.8, wx_gtk2u_richtext-2.8, wx_gtk2u_media-2.8, wx_gtk2u_stc-2.8, wx_gtk2u_gl-2.8 And these libraries actually exist in /usr/lib I type

问题 Env: OS: feodra 16 haskell-platform wxGTK-devel ghc 7.0.4 I am trying to install wxHaskell with cabal install wx Then these errors are given. Missing dependencies on foreign libraries: * Missing C libraries: wx_baseu-2.8, wx_baseu_net-2.8, wx_baseu_xml-2.8, wx_gtk2u_core-2.8, wx_gtk2u_adv-2.8, wx_gtk2u_html-2.8, wx_gtk2u_qa-2.8, wx_gtk2u_xrc-2.8, wx_gtk2u_aui-2.8, wx_gtk2u_richtext-2.8, wx_gtk2u_media-2.8, wx_gtk2u_stc-2.8, wx_gtk2u_gl-2.8 And these libraries actually exist in /usr/lib I type

问题 I am trying to cabal install a component of wxHaskell (Haskell platform 2013.2 against wxWidgets 3.0). I was able to compile the git version with 32 bit mingw from mingw.org. But in the end, the installed wx cannot function correct, and running a minimal example gives runtime exceptions in wxc.dll. So I try to compile the same thing under TDM-GCC 4.8.1 64bit, since the wxWidgets people provide their binary in the form of TDM-GCC compiled binaries. But I immediately run into compilation errors

问题 I'm trying to run an example using EnableGUI function. % ghci -framework Carbon Main.hs *Main> enableGUI >> main This is what I get instead of a working program: 2013-01-14 00:21:03.021 ghc[13403:1303] *** Assertion failure in +[NSUndoManager _endTopLevelGroupings], /SourceCache/Foundation/Foundation-945.11/Misc.subproj/NSUndoManager.m:328 2013-01-14 00:21:03.022 ghc[13403:1303] +[NSUndoManager(NSInternal) _endTopLevelGroupings] is only safe to invoke on the main thread. 2013-01-14 00:21:03

问题 My google-fu has failed me. How can I remove widgets that I've added to a Panel () ? For example, in the following, I want the controls -panel to become empty again. buildGUI = do f <- frame [ text := "Hello" ] controls <- panel f [] ctext <- staticText controls [ text := "Foo" ] set controls [ layout := margin 5 (widget ctext) ] set f [ layout := widget controls ] {- delete ctext ? How? -} return () (I'm trying to build a dynamic GUI, and I need to get rid of the old controls when it updates

问题 I am using WxHaskell to graphically show the state of a program that advertises state updates using TCP (which I decode using Data.Binary). When an update is received, I want to update the display. So I want the GUI to update its display asynchronously. I know that processExecAsync runs a command line process asynchronously, but I don't think this is what I want. 回答1: This is rough code using transactional variables (i.e. software transactional memory). You could use an IORef, MVar, or

问题 For my diagramming tool, I'd like to keep the code of the core model isolated from the GUI. In the following example, the "state " is passed around with vDiag , which is a Tvar . This is a design decision in wx. Now, For my diagramming tool, I 'd like the core model to be "stored" in a fgl Graph, (with complex types in it), and wx will be given only a view on it; say in this example, a list of points for read access when painting, and some functions to write when clicking, dragging, etc.. . I

问题 I'm testing wxHaskell on Windows XP using the "Hello World" here: http://www.haskell.org/haskellwiki/WxHaskell/Quick_start But when it runs on my machine, all the text doesn't display. For instance, "Quit" will just display "Q". Any Ideas? 回答1: You need to ensure that the wxWidgets used to build wxhaskell has Unicode support enabled. I think you can check by running wx-config --libs --unicode. What I think is happening is that wxWidgets is expecting simple 8 bit chars but is receiving wide 32

问题 I'm having a hard time finding out how to make something change every time the user interacts with my program. It's hard to explain so here's an example (Haskell + wxhaskell): simulate :: Int -> Frame () -> IO () simulate qNr window = do fdata <- readFile "qarchive" case (split (listTake (split fdata '\n') qNr 0) '#') of (qst:a:b:c:coralt:answer:x) -> do -- GUI Controls Initialization (buttons,text,etc...) nextButton <- button window [text := "Next Question ->", on command := set infoField

问题 I am experimenting with wxHaskell. I wasn't able to run the app under ghci, so I have to use application to test it. I wanted to test the program with println debugging. However, it seems that putStrLn doesn't work in GUI: {-# LANGUAGE Haskell2010 #-} module Main where import Graphics.UI.WX drawUI dc view = do circle dc (point 10 10) 5 [penKind := PenSolid, color := red] putStrLn "painted" helloGui :: IO () helloGui = do f <- frame [ text := "Example", resizeable := False, bgcolor := white,