Hi Christian,
> Dear Valeriy
>
> Thank you for your answer.
> I am not sure if I understand it correctly: Do you mean to place
> 100 000 TObjects in TFile?
yes, it works with TFiles
> What I did at the moment is to create a system directory with
> 10,000 empty text-files in it.
> It took TRootBrowser 115 seconds to open this directory, which
> is much too slow to be useful.
This option doesn't work with TSystemFiles. Nevertheless yours
number is strange. I made similar tests on my average computer
(linux,pentium-2, 800MHz). Response is much faster than in your case.
BTW it's faster than KDE-2 browser.
> Do you mean that grouped items are hidden from the browser
> because of this slowness?
Not correct statement. Items are not hidden. You can display content
of the group by clicking on "group icon".
>Do you have some simple example?
Try from root prompt:
li = new TList();
for (int i=0; i<100000; i++) li->Add(new TObject());
gROOT->GetListOfBrawsables->Add(li);
new TBrowser();
Click on TList in the left part of browser.
Regards. Valeriy
>
> Best regards
> Christian
>
> Valeriy Onuchin wrote:
>
> > Hi Christian,
> >browsing container with a large number of object (e.g. 100 000)
> >its content is displayed as a set of "grouped items" (you will see
> >a set of special icons in the right part of browser).
> >fGroupSize determines a number of items in each group.
> >To find in which group specific item is located you can either invoke
> >search dialog by clicking Ctrtl-F F7 keys or determine from
> >a name of the group which is "name_of_first_item-name_of_last_item".
> >This is done to make browsing of large containers to be effective.
> >You can disable this feature by setting fGroupSize to some very large
> >number, e.g. 100 000 000.
> >
> >Regards. Valeriy
> >
> >
> >
> >
> >>Dear Rooters
> >>
> >>Currently, I am trying to understand the code from TRootBrowser,
> >>and I have problems with TRootIconBox::AddObjItem():
> >>
> >>What is the reason of "fGroupSize" and "fGrouped"?
> >>
> >>What does "switch to global view mode" mean?
> >>
> >>What does ("Browser.GroupView","1000") mean, i.e.
> >>groupsize = 1000 vs 10000000 if unchecked??
> >>(I know that the default is set in system.rootrc, but I do
> >>not know the reason for this setting.)
> >>
> >>When I check/uncheck Menu "Group Icons", I do not see
> >>any difference in the behavior of TRootBrowser, either.
> >>
> >>Thank you in advance
> >>
> >>Best regards
> >>Christian
> >>_._._._._._._._._._._._._._._._
> >>C.h.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
> >>_._._._._._._._._._._._._._._._
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
>
>
>
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:12 MET