transparent theme

[topepo]

I know... yet another theme. This one is best for presentations with non-standard background colors.

[clauswilke]

For the various backgrounds, is there a reason you use rectangles with fill color transparent rather than element_blank()? It seems to me that removing those elements entirely would be slightly cleaner.

[thomasp85]

@teunbrand can you look into updating this to the newest theme style (using ink and paper etc)

[teunbrand]

This is now updated to latest theme changes.
I've moved this theme away from using fixed values like "grey20".
Instead, it does a neat trick where it blends ink and paper like all the other themes, but the trick is that paper = alpha(ink, 0) thus mixing between a solid and transparent colour.

In the example below, that causes the gridlines to always be darker over the background and not lighter over the red parts.

devtools::load_all("~/packages/main/ggplot2/")
#> ℹ Loading ggplot2

p <- ggplot(mpg, aes(displ, hwy)) +
  geom_point() +
  theme_transparent() +
  facet_wrap(~"Strip title")

# Make rectangle pattern
rectangles <- rectGrob(
  unit(c(0.25, 0.75), "cm"), unit(c(0.25, 0.75), "cm"), 
  width = unit(0.5, "cm"), height = unit(0.5, "cm"), 
  gp = gpar(fill = "red", col = NA)
)
pattern <- pattern(
  rectangles, 
  x = unit(0.5, "cm"), y = unit(0.5, "cm"),
  width = unit(1, "cm"), height = unit(1, "cm"), 
  extend = "repeat"
)

grid.newpage()
grid.draw(rectGrob(gp = gpar(fill = pattern, col = NA)))
grid.draw(ggplotGrob(p + theme_transparent()))

^{Created on 2024-11-11 with reprex v2.1.1}

[topepo]

Thanks for getting this over the finish line!