JSROOT Click Handling

ROOT
1

Hello,

I was wondering if anyone had a simple example of handling clicking on a JSROOT plot. Is possible to initiate some event by clicking on a bin for example?

Thanks,
Josh

2

Hi Josh,

There are two variants to provide user actions - user-defined tooltip handler:

https://root.cern/js/latest/api.htm#custom_html_tooltip_hanlder
https://root.cern/js/latest/api.htm#custom_html_tooltip_hanlder_src

And custom zoom handler:

https://root.cern/js/latest/api.htm#custom_html_zooming

There is no event handler with mouse click.
In that situation and for that kind of events you want to have such handler?

Regards,
Sergey

3

Hello Sergey,

Thanks for the quick reply. What I was envisioning was clicking on a bin in a histogram and loading a new page that might display more detailed information about the bin in question. I would of course handle the output and display of the second page what I was looking for is just the clicking on the bin and getting basic stats about it.

Cheers,
Josh

4

Hi Josh,

This is not yet supported.
Now in most cases click on histogram bin connected with zooming or moving of histogram display.
I will check if this can be implemented.

Regards,
Sergey

5

Hi Josh,

I add new functionality to the dev version. Now one can assign click and double click handlers.
Example see here:

http://jsroot.gsi.de/dev/api.htm#custom_html_tooltip_hanlder
http://jsroot.gsi.de/dev/api.htm#custom_html_tooltip_hanlder_src

In close future (approx end of October) this will be in next 5.6.0 release.

Regards,
Sergey

6

Wow, thanks for such a quick turnaround on the implementation, Sergey!

7

Be aware - it is now working only for 2D plots, probably I will implement support for lego plots in the future

8

Using the latest dev works great for 2D. An implementation for 1D histos would be greatly appreciated.

Thanks again for implementing this for 2D so quickly.

Josh

9

You misunderstood me - 2D means drawing of normal canvas without WebGL.
All basic classes (TH1/TH2, TGraph, …) should work now with such handlers

10

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