Convert all text elements in a theme to marquee elements

While element_marquee() should behave similar to ggplot2::element_text() when used on plain text (i.e. text without any markdown markup), the reality can be different. This is because the text shaping engine used by marquee (textshaping::shape_text()) may differ from the one used by the graphics device (which is responsible for laying out text in element_text()). Differences can range from slight differences in letter spacing to using a different font altogether (this is because the font keywords "", "sans", "serif", "mono", and "symbol" may be mapped to different fonts depending on the shaper). One way to handle this is to provide an explicit font name for the elements, but alternatively you can use this function to convert all text elements in a theme to element_marquee()

Usage

marquefy_theme(theme)

Arguments

theme

A (complete) ggplot2 theme

Value

theme with all text elements substituted for marquee elements

Examples

library(ggplot2)
ggplot(mtcars) +
  geom_point(aes(disp, mpg)) +
  ggtitle("How about that") +
  marquefy_theme(theme_gray())