ENH: Extend vtkMRMLNodeCallback API adding PrintSelf/GetReceivedEvents

This commit add the GetReceivedEvents and PrintSelf functions.
PrintSelf function displays the list of observed event that have been
invoked. This will be used in tests to display more information in case
the expected event count is different from the actual one.

Issue #3708

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23312 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Add TestClearScene to vtkMRMLNodeTest1

This commit extends the test to check that the event invoked by
either a referencing or referenced node when clearing a scene are the expected
ones.

Issue #3708

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23313 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Update EMSegment to fix narrowing and non virtual dtor warnings.

Issue #3419

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r17052 | jcfr | 2014-06-06 21:29:01 -0400 (Fri, 06 Jun 2014) | 3 lines

COMP: Avoid implicit narrowing casts

Explicitly cast initializers in {} array initializer where the assigned
type is smaller than the value type. This avoids implicit narrowing in a
{} initializer, which is ill-formed in C++11.

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r17051 | jcfr | 2014-06-06 21:21:39 -0400 (Fri, 06 Jun 2014) | 3 lines

COMP: Remove gratuitous virtual

Remove 'virtual' specifier of private class in source file, where said
class is not and (due to being in a source file) never will be derived.
This avoids needing an explicit (virtual) dtor in order to avo
id a -Wnon-virtual-dtor warning.

From: Matthew Woehlke <matthew.woehlke@kitware.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23314 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Fix overloaded virtual warnings with VTKv6

Explicitly use base class implementations of transform overloads
operating on 'float' (which cast and call the double overloads, and so
will call the appropriate derived code) in order to avoid hiding the
overloads in the derived class. (Fixes -Woverloaded-virtual warnings.)
COMP: Remove gratuitous virtual

Remove 'virtual' specifier of private classes in source files where said
classes are not and (due to being in a source file) never will be
derived. This avoids needing an explicit (virtual) dtor in order to
avoid a -Wnon-virtual-dtor warning.