Added button on slice for export D3js graph to png

[ymatagne]

Hello,

We want to export the graphics in dashboard to be transmitted to the different clients.

I therefore add a button on the slices allowing the export of the graph D3.JS to a file png.

These actions are performed on the browser side.

Have a great day.
Yan

[coveralls]

Coverage remained the same at 69.459% when pulling 5a18021 on ymatagne:export_slice_to_png into ed9f564 on apache:master.

[coveralls]

Coverage increased (+0.006%) to 69.465% when pulling ec087f6 on ymatagne:export_slice_to_png into ed9f564 on apache:master.

[coveralls]

Coverage increased (+0.006%) to 69.465% when pulling ec087f6 on ymatagne:export_slice_to_png into ed9f564 on apache:master.

[zhangwenwu]

Uncaught DOMException: Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.
How to solve this problem?

[Benji81]

Hello,
Any progress on this PR?
It is a very nice feature

[milesmuthu1]

Hi,

Any progress on this feature? Would be awesome to have.

[kristw]

Close and create issue to track idea.
#6743