Re: [ROOT] TRootBrowser: Menu "Group Icons" ?

From: cstrato (aon.912121399@aon.at)
Date: Mon Jun 23 2003 - 21:14:11 MEST


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?

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.

Do you mean that grouped items are hidden from the browser
because of this slowness? Do you have some simple example?

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
>>_._._._._._._._._._._._._._._._
>>
>>
>>
>>    
>>
>
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>  
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