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From Andrei:
new class TGeoIterPlugin. 
This is an ABC for user plugins that need to call some arbitrary code during 
geometry hierarchy iteration. The first use case (requested in Savannah #57591)
is to dynamically change the color of volumes in selected paths, but not the 
color of the same volume in other paths. This use case is already implemented 
in TGeoPainter and an example of usage is given in the tutorials files 
$ROOTSYS/tutorials/geom/iterplugin.cxx and runplugin.C.


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  New tutorial -- showing VSD (Visualization Summar File) from ALICE.
  For now shows clusters and reconstructed tracks but adding hits and
  kinematics is now easy!

* MultiView.C
  Add function SetDepth() to make it easy to set current z-depth of
  all projection managers at the same time.


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  executed several times).
  root [0] .L multipalette.C
  root [1] multipalette()
  root [2] multipalette()


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TGLViewer and sub-classes:
- Improve help text for TGLViewer ("Help on GL viewer").
- Add support for menu-bar hiding in TGLSAViewer.
- Allow TGLEmbeddedViewer to be connected to a GED editor.
- Remove support for "camera home" on double click -- show GED editor
  of the viewer instead.

TGLEventHandler:
- Improve handling of mouse-button events:
  - Only allow single button activity at the same time.
  - Remove function-static variables.

TEveViewer:
- Enable by default menu-bar hiding for GL viewers.


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  Canvas. It will be used by the TColor documentation.


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merge developments in https://root.cern.ch/svn/root/branches/dev/roostats/roofit/roostats from revision 30833 to revision 31273 


fix also the tutorials due to the new changes (copy from branch)


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  Set default geo colors.

* geom_atlas_playback.C
  New tutorial playing a recording of a geom_atlas.C session.


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Also state where the tutorial is ($ROOTSYS/tutorials/whatever) and link it to subversion.


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  Add setter for number of segments of a circle - SetDrawQuality(int).

* TGLEventHandler
  On Alt/Shift M1 down enable camera rotation.
  This prevents Clicked() signal to be emmitted on button release.

* compound.C
  Set projection type.


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Fix printf's format specifier: the thread number "nr" is long, not long long. Fixes http://root.cern.ch/phpBB2/viewtopic.php?t=9385
Remove indentation of thread numbers, they all have of single digits only.


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Add new 2DMode kValSizeOutline. Change default mode to kValSize.

tutorials/eve/calorimeters.C
Remove unnecessary line.

tutorials/eve/calo_detail.C
Use kValSizeOutline mode for irregular data. Add example of TGLAnnotation.


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   Add argument 'cache=sz' to control the usage of the cache, e.g.

          runProof("eventproc(cache=0)")

   disables the cache.


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  For PROOF tutorials:
  - add argument 'nwrk=N' to change the number of workers also on the fly, e.g.
         runProof("simple(nwrk=2)") 
  - add argument 'punzip' to enable parallel unzipping, e.g.
         runProof("eventproc(punzip)") 
  In the new PROOF tutorial "evenproc":
  - remove the need for the external file event-http.txt for the dataset creation
    (file names are generated on the fly)
  - read by default only the needed brabches; add option 'readall' to switch to full
    reading, e.g. runProof("eventproc(readall)")
  - add the possibility to change data source, e.g.
         runProof("eventproc(datasrc=root://lxfsrd0706.cern.ch//pool/event/http)")


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   Add tutorial "eventproc" reading "event" like events from the ROOT HTTP server
   This is useful to test the new perfomance information being added to the PROOF
   dialog box.


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scaling (compression/extension) of certain space region as required by
NA62 to show the 200m long detector in a meaningful way.

Several generalizations of the projection infrastructure were
required:

1. TEveProjectable::ProjectedClass() takes an argument:
     virtual TClass* ProjectedClass(const TEveProjection* p) const = 0;
   thus allowing different projected classes for different projections.

2. All TEveProjection::ProjectPoint/Vector(...) functions have an
   additional "depth" argument thus allowing the projected classes to
   skip explicit setting of depth after the point has been projected
   -- this could damage the 3rd component.

   Pre-scaling now supports 3 dimensions.

3. Abstract TEveProjected::SetDepth() has been split into two parts:
   a) It has been implemented in the base class where it checks for
      the projection type (2d) before calling the local function;
   b) Abstract SetDepthLocal() has been added to provide the same
      functionality.
   This allows for the 2d/3d check to be done in place only.

4. New projection class has been introduced: TEve3DProjection.
   It performs pre-scaling and offsets the center.

5. To simplify the projection of lists TEveElementList has been made
   projectable and corresponding TEveElementListProjected class
   introduced. This also fixed the problem with render-state not being
   propagated to projected classes.
   The check whether to project a sub-tree of elements is still performed.

6. TEveGeoShapeProjected has been introduced to represent the 3D
   projection of a TEveGeoShape (2D projection is handled by
   TEvePolygonSetProjected).

   Points, lines and tracks use the same projected class for both 2D
   and 3D projections.

An example showing this functionality has been added as a new tab in
tutorials/eve/projection_prescale.C.


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graf3d/gl/inc/TGLViewer:
Change enum ESecSelType: remove obsolete member kNone and redefine kAlways to kOnRequest.

graf3d/gl/src/TGLEventHandler:
Set default secondary selection mode to kOnRequest: Buy default secondary
selection is now activated also on mouse click if this is defined by TGLLogicalShape.

graf3d/eve/inc/TEveElement.h:
graf3d/eve/src/TEveElement.cxx:
Add virtual function ForwardSelection() to allow TEveElement objects to forward its selection
state. This is required in case if some other objects is managing its selection and highlight state.

graf3d/eve/src/TEveSelection.cxx:
In MapPickedToSelect() first check if element is forwarding a selection.

graf3d/eve/inc/TEveCaloData.h
graf3d/eve/src/TEveCaloData.cxx
Add a member to hold a list of secondary selected cells (i.e. towers). Add a functionality to
manage selection state of calorimeter objects. In order to fit in TEveSelection procedure
TEveCaloData now inherits from TEveElement and manages selection state of child elements in FillImpliedSelected().

graf3d/eve/inc/TEveCalo.h:
graf3d/eve/src/TEveCalo.cxx:
Forward selection to TEveCaloData. Override IncImpliedSelected() to printout selected tower info.

tutorials/eve/calo_detail.C
Call  IncDenyDestroy() on calo data, since it is TEveElement, but not added anywhere.

tutorials/eve/calorimeters.C
In second tab create four different calorimeter views to demonstrate secondary selection.


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this fises crash in rs701 tutorial


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This patch fixes the spelling of "function" in the root source code
and documentation, which is misspelled (sometimes as part of larger
"function"-based words) at least 152 times:

* "funciton" 48 times
* "funcion" 36 times
* "funtion" 23 times
* "fucntion" 17 times
* "functionn" 6 times
* "fuction" 6 times
* "fuunction" 4 times
* "functioin" 3 times
* "fonction" 3 times
* "funstion" twice
* "fnuction" once
* "functiom" once
* "functio" once
* "funcition" once


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  to verify that all went well.


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* tutorials/eve - consistently use
     parent->AddElement(el)
  instead of:
     gEve->AddElement(el, parent)


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