doc/v622/demo_8py.html

import os, sys

import ROOT


# To run, do an "execfile( '<path-to>/demo.py' )" or "python <path-to>/demo.py"


# enable running from another directory than the one where demo.py resides

workdir = os.path.dirname( sys.argv[0] )

if workdir:

   os.chdir( workdir )


# This macro generates a Controlbar menu.

# To execute an item, click with the left mouse button.

# To see the HELP of a button, click on the right mouse button.


ROOT.gStyle.SetScreenFactor(1)   # if you have a large screen, select 1.2 or 1.4


bar = ROOT.TControlBar( 'vertical', 'Demos', 10, 10 )


# The callbacks to python work by having CINT call the python interpreter through

# the "TPython" class. Note the use of "raw strings."

bar.AddButton( 'Help on Demos', r'TPython::Exec( "execfile( \'demoshelp.py\' )" );', 'Click Here For Help on Running the Demos' )

bar.AddButton( 'browser',       r'TPython::Exec( "b = ROOT.TBrowser()" );',          'Start the ROOT browser' )

bar.AddButton( 'framework',     r'TPython::Exec( "execfile( \'framework.py\' )" );', 'An Example of Object Oriented User Interface' )

bar.AddButton( 'first',         r'TPython::Exec( "execfile( \'first.py\' )" );',     'An Example of Slide with Root' )

bar.AddButton( 'hsimple',       r'TPython::Exec( "execfile( \'hsimple.py\' )" );',   'Creating histograms/Ntuples on file', "button" )

bar.AddButton( 'hsum',          r'TPython::Exec( "execfile( \'hsum.py\' )" );',      'Filling Histograms and Some Graphics Options' )

bar.AddButton( 'formula1',      r'TPython::Exec( "execfile( \'formula1.py\' )" );',  'Simple Formula and Functions' )

bar.AddButton( 'surfaces',      r'TPython::Exec( "execfile( \'surfaces.py\' )" );',  'Surface Drawing Options' )

bar.AddButton( 'fillrandom',    r'TPython::Exec( "execfile( \'fillrandom.py\' )" );','Histograms with Random Numbers from a Function' )

bar.AddButton( 'fit1',          r'TPython::Exec( "execfile( \'fit1.py\' )" );',      'A Simple Fitting Example' )

bar.AddButton( 'multifit',      r'TPython::Exec( "execfile( \'multifit.py\' )" );',  'Fitting in Subranges of Histograms' )

bar.AddButton( 'h1draw',        r'TPython::Exec( "execfile( \'h1draw.py\' )" );',    'Drawing Options for 1D Histograms' )

bar.AddButton( 'graph',         r'TPython::Exec( "execfile( \'graph.py\' )" );',     'Example of a Simple Graph' )

bar.AddButton( 'gerrors',       r'TPython::Exec( "execfile( \'gerrors.py\' )" );',   'Example of a Graph with Error Bars' )

bar.AddButton( 'tornado',       r'TPython::Exec( "execfile( \'tornado.py\' )" );',   'Examples of 3-D PolyMarkers' )

bar.AddButton( 'shapes',        r'TPython::Exec( "execfile( \'shapes.py\' )" );',    'The Geometry Shapes' )

bar.AddButton( 'geometry',      r'TPython::Exec( "execfile( \'geometry.py\' )" );',  'Creation of the NA49 Geometry File' )

bar.AddButton( 'na49view',      r'TPython::Exec( "execfile( \'na49view.py\' )" );',  'Two Views of the NA49 Detector Geometry' )

bar.AddButton( 'file',          r'TPython::Exec( "execfile( \'file.py\' )" );',      'The ROOT File Format' )

bar.AddButton( 'fildir',        r'TPython::Exec( "execfile( \'fildir.py\' )" );',    'The ROOT File, Directories and Keys' )

bar.AddButton( 'tree',          r'TPython::Exec( "execfile( \'tree.py\' )" );',      'The Tree Data Structure' )

bar.AddButton( 'ntuple1',       r'TPython::Exec( "execfile( \'ntuple1.py\' )" );',   'Ntuples and Selections' )

bar.AddButton( 'rootmarks',     r'TPython::Exec( "execfile( \'rootmarks.py\' )" );', 'Prints an Estimated ROOTMARKS for Your Machine' )

bar.AddSeparator()       # not implemented

bar.AddButton( 'make ntuple',   r'TPython::Exec( "execfile( \'mrt.py\' )" );',       'Convert a text file to an ntuple' )


bar.Show()


ROOT.gROOT.SaveContext()


## wait for input to keep the GUI (which lives on a ROOT event dispatcher) alive

if __name__ == '__main__':

   rep = ''

   while not rep in [ 'q', 'Q' ]:

      # Check if we are in Python 2 or 3

      if sys.version_info[0] > 2:

         rep = input( 'enter "q" to quit: ' )

      else:

         rep = raw_input( 'enter "q" to quit: ' )

      if 1 < len(rep):

         rep = rep[0]