Add vegawidget functions to your package

These functions are offered to help you import and re-export vegawidget functions in your package. For more detail, please see this article.

use_vegawidget(s3_class_name = NULL)

use_vegawidget_interactive()

Arguments

s3_class_name

character, name of an S3 class for object to be coerced to a vegaspec; default (NULL) implies no additional class

Value

invisible NULL, called for side effects

Details

use_vegawidget():

Adds vegawidget functions:

• as_vegaspec(), vw_as_json()

• format(), print(), knit_print()

• vegawidget(), vega_embed(), vw_set_base_url()

• vw_to_svg() and other image functions

• vegawidgetOutput(), renderVegawidget()

In practical terms:

• adds vegawidget to Imports in your package's DESCRIPTION file.

• adds V8, withr, fs, rsvg, and png to Suggests in your package's DESCRIPTION file.

• creates R/utils-vegawidget.R

• you can delete references to functions you do not want to re-export.

If you have your own S3 class for a spec, specify the s3_class_name argument. You will have to edit R/utils-vegawidget-<s3_class_name>.R:

• add the code within your class's method for to coerce your object to a vegaspec.

To permit knit-printing of your custom class, you will have to add some code to your package's .onLoad() function.

use_vegawidget_interactive():

If you want to add the JavaScript and Shiny functions, use this after running use_vegawidget(). It adds:

• vw_add_data_listener() and other listener-functions.

• vw_handler_data() and other handler functions.

• vw_shiny_get_data() and other Shiny getters.

• vw_shiny_set_data() and other Shiny setters.

In practical terms:

• adds shiny, dplyr, to Suggests.

• creates R/utils-vegawidget-interactive.R.

• at your discretion, delete references to functions you do not want to re-export.