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Add is_free() function to CoordSf. Closes #2651. #2652

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Merged
merged 1 commit into from
May 24, 2018
Merged

Add is_free() function to CoordSf. Closes #2651. #2652

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2 changes: 2 additions & 0 deletions R/coord-.r
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Original file line number Diff line number Diff line change
Expand Up @@ -87,6 +87,8 @@ Coord <- ggproto("Coord",

is_linear = function() FALSE,

# Does the coordinate system support free scaling of axes in a faceted plot?
# Will generally have to return FALSE for coordinate systems that enforce a fixed aspect ratio.
is_free = function() FALSE,

setup_params = function(data) {
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3 changes: 3 additions & 0 deletions R/sf.R
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Expand Up @@ -353,6 +353,9 @@ CoordSf <- ggproto("CoordSf", CoordCartesian,
)
},

# CoordSf enforces a fixed aspect ratio -> axes cannot be changed freely under faceting
is_free = function() FALSE,

aspect = function(self, panel_params) {
if (isTRUE(sf::st_is_longlat(panel_params$crs))) {
# Contributed by @edzer
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