Add 'viewbox' attribute to ggplotly svg output to allow scaling in R Markdown

[aoles]

Hi,
I would like to autoscale SVG graphics produced by a call to ggplotly in order to fit them into the parent CSS container in a R Markdown document, as described here. For this, it is necessary for the SVG element to have a viewBox attribute that describes the bounding box of the visible contents. Do you think it would be possible to extend your package to include this attribute?

Cheers,
Andrzej

[cpsievert]

Does the new orca() function give you a way to achieve this?

[jcubic]

@cpsievert I also have problem with scalling svg in R, and viewbox would help, what is orca function? Is it documented somewhere? Is it thee same as plotly/orca repo?

[jcubic]

If this is export using orca app to generated png https://github.com/ropensci/plotly/blob/31d027de3e15e0fb37060155bc03cf4e5e6f68e0/R/orca.R then it would probably be very slow the same as webshot that taken 24 seconds on my local machine to generate png 3000x1000 and both Plotly.toImage and webshot create image with small fonts if picture is bigger. viewbox would make svg scale so the font should be the same even if you change resolution.

[cpsievert]

Just FYI, the orca app can export to svg -- orca(ggplotly(qplot(1:10)), "test.svg")

BTW, I'd be happy to chat about your experiences with trying to make the svg output of ggplotly() to scale sensibly...