This something you are afaik able to do. I'm cc'ing David (qthaskell's author).
On Wed, Mar 10, 2010 at 1:59 AM, Philip Beadling < [email protected]> wrote: > Hi, > > I know this isn't a qtHaskell list, but I don't think there is one. > > Was wondering if anyone has any ideas on the below. > > Basically I'm trying to control a Marble (Map software) Qt widget from > qtHaskell. > > So I've mocked up a very simple user interface in Qt Designer (1 form, 1 > Marble widget). > > I can load this up and display it fine in Haskell, but as soon as I try > to interrogate the widget I get a seg fault (eg qObjectProperty) > > My guess is that the call to findChild, although it executes OK it is > not producing a valid QObject - probably casting to > Marble::MarbleWidget* it crux of the problem. > > I can get this working using standard Qt Widgets (just like the examples > show from qtHaskell), so I know the method is sound - although calling > 3rd party widgets like this may be ambitious or impossible. > > I recognise this is a fairly broad query! Has anyone tried anything > similar? Is it even possible to do this in qtHaskell as I'm proposing? > > I'm a Qt novice, so it may well be that I've misunderstood qtHaskell. > > > Cheers, > > Phil. > > > Using: > GHC 6.12.1 / QT4.5 / Marble 0.8 / Ubuntu 9.04 > > > > module Main where > > import Qtc > > main :: IO () > main > = do > app <- qApplication () > rok <- registerResource "marble.rcc" > loader <- qUiLoader () > uiFile <- qFile ":/marble.ui" > open uiFile fReadOnly > ui <- load loader uiFile > close uiFile () > > ui_map <- findChild ui ("<Marble::MarbleWidget*>", "MarbleWidget") > sc <- qObjectProperty ui_map "showCompass" > > qshow ui () > ok <- qApplicationExec () > return () > > > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe > -- Alp Mestanogullari http://alpmestan.wordpress.com/ http://alp.developpez.com/
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