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Description
a lot of legends are coming out with weird positioning (#194 (comment))
a couple things to work out:
-
move the horizontal position of the legend to the right more
layout$legend$x <- 1.0 # move it to the right a bit layout$legend$xanchor <- "left" layout$annotation[[1]]$x <- 1.01 layout$annotation[[1]]$xanchor <- "left"
-
the vertical position of the legend should stay in the middle, with
yanchor <- "middle"
layout$legend$y <- 0.5 # page middle layout$legend$yanchor <- "middle"
but we should compute the vertical position of the legend title annotation to remain above the legend, no matter how many entries. For now, we could hardcode a mapping in that would work for default font-sizes:
- 8 legend entries:
annotation$y <- 0.65
(from manual inspection) - 1 legend entry:
annotation$y <- 0.52
(manual inspection) - ->
annotation$y <- 0.14125 * number_of_legend_items - 0.48
(computed from those two points above)
@alexcjohnson, how do you think legend titles will work in the future? a separate attribute inside
legend
? - 8 legend entries:
-
manual legend positions from ggplot: https://github.com/ropensci/plotly/blob/add-r-cookbook-tests/tests/cookbook-test-suite/legends.R#L109-L122
cc @tdhock , @cpsievert