How to use JSROOT in a notebook?

ROOT
1

Hi all,

I want to make use of JSROOT capabilities in ROOT notebook.
When I did the same as in the following pagehttps://root.cern.ch/notebooks/HowTos/HowTo_ROOT-Notebooks.html, I got the following:

[code]---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
in ()
1 ROOT.enableJSVis()
----> 2 c.Draw()
3 ROOT.disableJSVis()

/usr/local/root/lib/ROOTaaS/iPyROOT/utils.py in _PyDraw(thePad)
368 “”"
369 drawer = CanvasDrawer(thePad)
–> 370 drawer.Draw()
371
372

/usr/local/root/lib/ROOTaaS/iPyROOT/utils.py in Draw(self)
360
361 def Draw(self):
–> 362 self._display()
363 return 0
364

/usr/local/root/lib/ROOTaaS/iPyROOT/utils.py in _display(self)
354 else:
355 if self._canJsDisplay():
–> 356 self._jsDisplay()
357 else:
358 self._pngDisplay()

/usr/local/root/lib/ROOTaaS/iPyROOT/utils.py in _jsDisplay(self)
324 # Workaround to have ConvertToJSON work
325 pad = ROOT.gROOT.GetListOfCanvases().FindObject(ROOT.gPad.GetName())
–> 326 json = ROOT.TBufferJSON.ConvertToJSON(pad, 3)
327 #print “JSON:”,json
328

/usr/local/root/lib/ROOT.pyc in __getattr2(self, name)
445
446 # reaching this point means failure …
–> 447 raise AttributeError( name )
448
449 def delattr( self, name ):

AttributeError: TBufferJSON
[/code]

How can I enable and use JSROOT in a ROOTbook? Is there anything missing in my root?

Thanks in advance,
Kazuyoshi

2

Hi Kazuyoshi,

you should enable the http module.
In CMAKE:

cmake /path/to/ROOT/sources [...] -Dhttp=ON

Cheers,
Danilo

3

Hi Kazuyoshi,

to be safer in the future, I added a clear warning message when the user tries to display a canvas or a geometry with javascript and the http module is not available.
Thanks for the report.

Danilo

4

Dear Danilo,

It works by adding the http support! Thank you very much for your support and the fantastic function!

Kazuyoshi