Alan W. Irwin wrote:
> On 2009-05-09 20:23-0400 Hazen Babcock wrote:
>   
>
> By the way, Alban, could you please review Werner's reports to see if you
> can verify that Mac OS X issue with qtwidget?  Does qtwidget use of Qt4
> on Mac OS X eventually boil down to a call to X or is there some other
> underlying windows system it uses there?  (Out of curiousity, I have the
> same question for the Windows platform.)  If on Mac OS X, qtwidget is not
> X based it is possible that quite different code paths are being used
> in Qt, and Werner has found a Qt4 bug.  Alternatively, we could have a qt
> bug that doesn't matter for an X-based qtwidget but which makes a difference
> when some other Windows system is underlying Qt4.
>
> Alan
>   
I've just tried on Tony's Mac (Qt 4.4.3), and what we observed was more
serious than what Werner reported: all the pages in the interactive
driver are blank. However, the funny thing is that when rescaling the
window, the grey margins I added to keep a constant aspect ratio in the
plot appear. So it *is* actually drawing things, but not the plots (or
it plots a black rectangle over the whole).

Werner, can you confirm that grey margins appear when you stretch the
window, even on the first pages? If so, I may change part of the Qt
driver to make it closer to the one we use in QSAS (which works). This
was my first aim when developing the plplot driver, but it evolved much
as we discussed, finally using simpler structures, making the program
clearer.

I cannot easily debug this issue as the only test machine for me is
Tony's laptop, and Tony cannot do the job as he doesn't know much of
this driver and already has plenty of things to do on QSAS.

Alban

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