Reestablish method TPythia6::Pytune  (see https://root.cern.ch/phpBB3/viewtopic.php?f=3&t=20399&p=87881#p87881)

Due to some unknown changes updateTrackingAreas can be called
while visibleRect is empty and is never called again, breaking
the mouse tracking.

This reverts commit 47b5dea9.

This restores the same functionality as for the old rootmap file

This extends the current behavior that was previously just one level deep.

This reverts commit 86576da44cac8754494d22ae3c618c8b667c9811.
as it does not completely solve the problem (lead to seg fault in
ATLAS example)

This is similar to 384f6eab but applied to the case hit by ROOT-7181
(involving class template specialization and auto-parsing).

This is to workaround weakness' of gdb's cast operation/syntax

Enable auto-parsing when autoloading is disabled in TClingCallbacks::LookupObject(clang::TagDecl* Tag).

This avoid 'suppressed diagnostics to be nonetheless pick up for the SFINAE mechanism/implementation

TSchemaRuleSet was return a new collection to be deleted by the caller and, of course, a few callers were missing
the delete.  Rather than explicitly adding the delete statement leverage the fact that we can cheaply return a
std::vector by value.   This has also the advantage of marking the content as const as intended.

Fix issue reported on the forum (Double conversion fails for negative values when using *MENU* setter function - https://root.cern.ch/phpBB3/viewtopic.php?f=3&t=20397&sid=62d836defc126dac61048e9706d6ecfe)

Note that the real problem comes from "TObject::Execute(const char *method, const char *params, Int_t *error)" and remains to be investigated

This reverts commit 944b1d4f.

Signed-off-by: Bertrand Bellenot <bertrand.bellenot@cern.ch>

Signed-off-by: Bertrand Bellenot <bertrand.bellenot@cern.ch>

Previously the checksum of the StreamerInfo of any collection (a
class which has a CollectionProxy) was set to zero.  However in the
case where the class was a custom collection (rather than an STL
collection) with only a CollectionProxy (and no custom streamer)
the class's checksum was stored/used during the streaming and
thus at read time (if the checksum changed) the StreamerInfo
could not be found.

Unlike STL collection, custom collection ought to indeed have
a version/checksum information stored as they could have older
version/implementation that did not rely on the CollectionProxy
for storage.

- spell check
- new group "tree"

Signed-off-by: Danilo Piparo <danilo.piparo@cern.ch>

come back in interactive mode for the next canvases. This problem was reported here:
https://root.cern.ch/phpBB3/viewtopic.php?f=3&t=20354

Signed-off-by: dpiparo <danilo.piparo@cern.ch>

due to the problems encountered when running the eventloop after
a fork(), workers have been modified to use a simple while loop
to listen to messages instead.

Signed-off-by: dpiparo <danilo.piparo@cern.ch>

This is not a real fix as it introduces a memory leak.

This reverts commit 001bde42.

just test the pointer before passing it to the backend for deletion.

A simple and lightweight way to do a parallel loop over
TTrees.

- support for multiple files as vector<string>,
  TFileCollection or TChain
- support for max number of processed entries
- automatic search for unnamed trees
- two different behaviours
   - nFiles < nWorkers: granularity at the event level
   - nFiles >= nWorkers: granularity at the file level

Signed-off-by: dpiparo <danilo.piparo@cern.ch>