On Sun Dec 14 20:47:06 GMT 2008, Michael Casadevall wrote: > Internally, PyQT4 uses qreals in its bindings for QLists, and so > forth. Although this works fine when qreal is a double since a float > will be converted implicatively, when it is a float, it looses the > ability to handle doubles since float is smaller than double. I > believe the solution is to remove explicate qreals, and handle both > float and double separately.
It's been a while since I did anything with this, but maybe you could take a look at these rough-and-ready patches for PyQt 4.3: http://www.diotavelli.net/PyQtWiki/PyQt4_on_the_Qtopia_Greenphone http://chaos.troll.no/~dboddie/Python/Greenphone/ What I did was to add checks for a PyQt "feature" called PyQt_FPU which used MappedType declarations for double if enabled, or float if disabled, for QList at least. So, much the same as you describe, except that I continued to use qreal in declarations because it should be appropriately defined, anyway. Oh, and the patches also contain lots of other Features because I was using Qtopia Core (as it used to be known) instead of Qt on X11. > Secondly, in some cases, sip tries to pass double points into qreals, > which breaks miserably on ARM. This happens when building plasma's > bindings. This happens when building a widget derived from > QGraphicsView, and that widget hasn't overridden getContetMargins. > getContentMargins accepts four qreal pointers, and sip tries to pass > in four double ones. I can provide the generated code in this > instance. I think you'll just have to handle this in the same way as for QList and friends. > I can provide access to relatively fast ARM hardware to help handle > porting work and so forth, if anyone is interested in working on > resolving this issue. Having spent a fair amount of my own time on this sort of thing, I'd love to be able to help but, sadly, I just don't have the time these days. I don't mind sharing experiences and testing things, though, so feel free to let me know how things are progressing. David _______________________________________________ PyQt mailing list [email protected] http://www.riverbankcomputing.com/mailman/listinfo/pyqt
