From: Rene Brun (
Date: Sun Nov 21 2004 - 09:41:52 MET

Hi Christian,

We will discuss in the team your request about the 32K limit
in the widgets. But I have a remark at this point.
I believe that a good table widget should be dynamic and not
reserve the space in a large physical widget that you have to scroll
anyhow to visualize it on any today screen. Otherwise you
will have memory problems and a very bad performance.

We know that we should provide a good matrix widget for scanning Trees
and operations a la Excel. I hope that we will be able to implement
such a widget in the coming months.

Rene Brun

On Sat, 20 Nov 
2004, cstrato wrote:

> Dear Rene
> I am sorry, but I cannot resist to make a comment, too:
> When I was searching for a framework for my own project in 1999,
> I was considering KDE/QT before I discovered ROOT which fitted
> my intentions perfectly and which in general I consider to
> be the best C++ framework for many reasons.
> I was also very delighted to see that ROOT offers its own
> architecture-independent GUI classes. Only after already
> extensive use of the TGClasses I realized that these classes
> suffer from the 32k limit which e.g. prevents the creation of
> large tables. This is really sad but I understand that the
> GUI development has a lower priority within ROOT development.
> I am still reluctant to switch to QT for many reasons, one
> reason being that I prefer to work with only one framework,
> and I hope that this limitation will be eliminated soon.
> Since ROOT was created to deal with very large data sets
> it would be great if there would also be a possibility to
> display/select large amounts of data within the GUI.
> Is there a timeframe within which the 32k problem will be
> eliminated?
> Best regards
> Christian
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> C.h.r.i.s.t.i.a.n. .S.t.r.a.t.o.w.a
> V.i.e.n.n.a.         .A.u.s.t.r.i.a
> -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
> Rene Brun wrote:
> > Hi Jacek,
> > 
> > I will wait for your new web page.
> > 
> > Concerning Qt, you are a wise man, we will be wise people too ::)
> > 
> > I will send the problem to Trolltech.
> > 
> > Rene Brun
> > 
> > On Sat, 20 
> > Nov 2004, Jacek M. Holeczek 
> > wrote:
> > 
> > 
> >>Hi,
> >>
> >>
> >>>I assume that you would like to see these files visible somewhere
> >>>from our VMC pages?
> >>
> >>We've already talked about modifying the "howto" with Ivana ...
> >>I proposed (she agreed) ... that we wait one or two month to gain some
> >>more experience with it, before we really "advice" people to follow it.
> >>In the meantime, people who need it NOW can use my roottalk mail(s) to get
> >>it running NOW.
> >>We also strongly hope that our G4 modifications will go to the G4
> >>mainstream development. There should be a new G4 release in a couple of
> >>weeks. Once we also know whether they took it or not, we can also advice
> >>people how to proceed with the "newest" G4 (7.0) ...
> >>(Basically, I volunteered to modify the "howto" then :-)
> >>
> >>What concerns Qt "emit" ... it is clearly a Qt problem. I doubt, however,
> >>that they will care ... especially for Qt releases that are already on the
> >>market ...
> >>You said it yourself ... it takes some minutes to install ROOT, but it
> >>takes some hours to install Qt ...
> >>I still think there is an easy way to "protect" root against this problem.
> >>And it costs nothing ...
> >>(Note here : I'm not a Qt fan ... I just occasionally need to use it.
> >>I will NOT then try to get in touch with trolltech to inform them that
> >>there is a problem. I think, someone who likes Qt and works with it daily
> >>should do this ...)
> >>
> >>Best regards,
> >>Jacek.
> >>
> > 
> > 
> > 
> > 

This archive was generated by hypermail 2b29 : Sun Jan 02 2005 - 05:50:10 MET