trace_position tidy eval

DESCRIPTION

@@ -46,7 +46,7 @@ VignetteBuilder:
 Config/testthat/edition: 3
 Encoding: UTF-8
 LazyData: true
-RoxygenNote: 7.2.0
+RoxygenNote: 7.2.3
 SystemRequirements: pandoc
 Collate: 
     'a-legend-draw.R'

NAMESPACE

@@ -12,9 +12,3 @@ export(geom_line_trace)
 export(geom_path_trace)
 export(geom_point_trace)
 export(geom_step_trace)
-import(ggplot2)
-importFrom(grid,gpar)
-importFrom(grid,grobName)
-importFrom(grid,grobTree)
-importFrom(grid,pointsGrob)
-importFrom(rlang,on_load)

NEWS.md

@@ -1,4 +1,6 @@
 # ggtrace (development version)
+* Implemented tidy evaluation for expressions passed
+to the trace_position argument (@sheridar #60)
 
 # ggtrace 0.2.0
 * Initial CRAN submission

R/a-legend-draw.R

@@ -52,7 +52,7 @@ draw_key_point_trace <- function(data, params, size) {
     0.5, 0.5,
     pch = data$trace_shape,
     gp  = grid::gpar(
-      col      = alpha(data$colour, 1),
+      col      = ggplot2::alpha(data$colour, 1),
       lty      = data$linetype,
       fontsize = data$trace_fontsize,
       lwd      = data$trace_lwd
@@ -64,9 +64,9 @@ draw_key_point_trace <- function(data, params, size) {
     0.5, 0.5,
     pch = data$shape,
     gp  = grid::gpar(
-      col      = alpha(data$fill, data$alpha),
-      fontsize = data$size * .pt + pt_stroke * .stroke / 2,
-      lwd      = pt_stroke * .stroke / 2
+      col      = ggplot2::alpha(data$fill, data$alpha),
+      fontsize = data$size * ggplot2::.pt + pt_stroke * ggplot2::.stroke / 2,
+      lwd      = pt_stroke * ggplot2::.stroke / 2
     )
   )
 
@@ -91,8 +91,8 @@ draw_key_path_trace <- function(data, params, size) {
     0.1, 0.5, 0.9, 0.5,
 
     gp = grid::gpar(
-      col     = alpha(data$colour, 1),
-      lwd     = data$size * .pt + data$stroke * .pt * 2,
+      col     = ggplot2::alpha(data$colour, 1),
+      lwd     = data$size * ggplot2::.pt + data$stroke * ggplot2::.pt * 2,
       lty     = 1,
       lineend = "butt"
     ),
@@ -105,8 +105,8 @@ draw_key_path_trace <- function(data, params, size) {
     0.1, 0.5, 0.9, 0.5,
 
     gp = grid::gpar(
-      col     = alpha(data$fill, 1),
-      lwd     = data$size * .pt,
+      col     = ggplot2::alpha(data$fill, 1),
+      lwd     = data$size * ggplot2::.pt,
       lty     = data$linetype,
       lineend = "butt"
     ),

R/geom-path-trace.R

@@ -196,7 +196,7 @@ extra_bkgd_params <- paste0("bkgd_", c(
 #' @return ggproto object
 #' @seealso \link[ggplot2]{GeomPath}
 #' @export
-GeomPathTrace <- ggproto(
+GeomPathTrace <- ggplot2::ggproto(
   "GeomPathTrace", ggplot2::Geom,
 
   required_aes = c("x", "y"),
@@ -347,7 +347,7 @@ GeomPathTrace <- ggproto(
 
     # Munch data
     # this divides data into line segments to plot
-    munched <- coord_munch(coord, data, panel_params)
+    munched <- ggplot2::coord_munch(coord, data, panel_params)
 
     # Silently drop lines with less than two points, preserving order
     rows    <- stats::ave(seq_len(nrow(munched)), munched$group, FUN = length)
@@ -401,9 +401,9 @@ GeomPathTrace <- ggproto(
           arrow         = arrow,
 
           gp = grid::gpar(
-            col       = alpha(clr, munched$alpha)[!end],
-            fill      = alpha(clr, munched$alpha)[!end],  # modifies arrow fill
-            lwd       = munched$size[!end] * .pt + strk * .pt * 2,
+            col       = ggplot2::alpha(clr, munched$alpha)[!end],
+            fill      = ggplot2::alpha(clr, munched$alpha)[!end],  # modifies arrow fill
+            lwd       = munched$size[!end] * ggplot2::.pt + strk * ggplot2::.pt * 2,
             lty       = lty,
             lineend   = lineend,
             linejoin  = linejoin,
@@ -441,9 +441,9 @@ GeomPathTrace <- ggproto(
           arrow         = arrow,
 
           gp = grid::gpar(
-            col       = alpha(clr, munched$alpha)[start],
-            fill      = alpha(clr, munched$alpha)[start],  # modifies arrow fill
-            lwd       = munched$size[start] * .pt + strk * .pt * 2,
+            col       = ggplot2::alpha(clr, munched$alpha)[start],
+            fill      = ggplot2::alpha(clr, munched$alpha)[start],  # modifies arrow fill
+            lwd       = munched$size[start] * ggplot2::.pt + strk * ggplot2::.pt * 2,
             lty       = lty,
             lineend   = lineend,
             linejoin  = linejoin,
@@ -528,13 +528,13 @@ geom_line_trace <- function(mapping = NULL, data = NULL, stat = "identity",
 #' @format NULL
 #' @usage NULL
 #' @export
-GeomLineTrace <- ggproto(
+GeomLineTrace <- ggplot2::ggproto(
   "GeomLineTrace", GeomPathTrace,
 
   extra_params = c(GeomPathTrace$extra_params, "na.rm", "orientation"),
 
   setup_params = function(data, params) {
-    params$flipped_aes <- has_flipped_aes(data, params, ambiguous = TRUE)
+    params$flipped_aes <- ggplot2::has_flipped_aes(data, params, ambiguous = TRUE)
 
     params
   },
@@ -545,9 +545,9 @@ GeomLineTrace <- ggproto(
     data <- data[order(data$PANEL, data$group, data$x), ]
     data <- GeomPathTrace$setup_data(data, params)
 
-    data <- flip_data(data, params$flipped_aes)
+    data <- ggplot2::flip_data(data, params$flipped_aes)
     data <- data[order(data$PANEL, data$group, data$x), ]
-    data <- flip_data(data, params$flipped_aes)
+    data <- ggplot2::flip_data(data, params$flipped_aes)
 
     data
   }
@@ -595,7 +595,7 @@ geom_step_trace <- function(mapping = NULL, data = NULL, stat = "identity",
 #' @format NULL
 #' @usage NULL
 #' @export
-GeomStepTrace <- ggproto(
+GeomStepTrace <- ggplot2::ggproto(
   "GeomStepTrace", GeomPathTrace,
 
   draw_group = function(data, panel_params, coord, direction = "hv") {

R/geom-point-trace.R

@@ -66,10 +66,10 @@ geom_point_trace <- function(mapping = NULL, data = NULL, stat = "identity",
 
   trans_fn <- function(dat, ex, inv = FALSE) {
     if (inv) {
-      return(subset(dat, !eval(ex)))
+      return(subset(dat, !rlang::eval_tidy(ex, dat)))
     }
 
-    subset(dat, eval(ex))
+    subset(dat, rlang::eval_tidy(ex, dat))
   }
 
   create_trace_layers(
@@ -81,7 +81,7 @@ geom_point_trace <- function(mapping = NULL, data = NULL, stat = "identity",
     show.legend       = show.legend,
     inherit.aes       = inherit.aes,
     params            = list(na.rm = na.rm, ...),
-    trace_position    = substitute(trace_position),
+    trace_position    = rlang::enquo(trace_position),
     background_params = background_params,
     trans_fn          = trans_fn,
     allow_bottom      = TRUE
@@ -117,7 +117,8 @@ create_trace_layers <- function(mapping, data, stat, geom, position,
 
   # If trace_position is 'bottom', create new column and use to override
   # original group specification.
-  if (allow_bottom && trace_expr == "bottom") {
+  if (allow_bottom && identical(rlang::as_label(trace_expr), "\"bottom\"")) {
+
     data <- ggplot2::fortify(~ transform(.x, BOTTOM_TRACE_GROUP = "bottom"))
 
     if (is.null(mapping)) {
@@ -126,8 +127,8 @@ create_trace_layers <- function(mapping, data, stat, geom, position,
 
     mapping$group <- as.name("BOTTOM_TRACE_GROUP")
 
-    # If trace_position is not 'all', evaluate expression
-  } else if (trace_expr != "all") {
+  # If trace_position is not 'all', evaluate expression
+  } else if (!identical(rlang::as_label(trace_expr), "\"all\"")) {
     # If data is not NULL, the user has passed a data.frame, function, or
     # formula to the geom. Need to fortify this before applying the predicate
     # passed through trace_position. For a formula fortify will return an
@@ -162,7 +163,7 @@ create_trace_layers <- function(mapping, data, stat, geom, position,
       bkgd_params[names(background_params)] <- background_params
     }
 
-    bkgd_lyr <- layer(
+    bkgd_lyr <- ggplot2::layer(
       data        = bkgd_data,
       mapping     = mapping,
       stat        = stat,
@@ -177,7 +178,7 @@ create_trace_layers <- function(mapping, data, stat, geom, position,
   }
 
   # Create trace layer
-  trace_lyr <- layer(
+  trace_lyr <- ggplot2::layer(
     data        = data,
     mapping     = mapping,
     stat        = stat,
@@ -252,7 +253,7 @@ GeomPointTrace <- ggplot2::ggproto(
       pch = coords$trace_shape,
 
       gp = grid::gpar(
-        col      = alpha(coords$colour, 1),
+        col      = ggplot2::alpha(coords$colour, 1),
         lty      = coords$linetype,
         fontsize = coords$trace_fontsize,
         lwd      = coords$trace_lwd
@@ -266,9 +267,9 @@ GeomPointTrace <- ggplot2::ggproto(
       pch = coords$shape,
 
       gp = grid::gpar(
-        col      = alpha(coords$fill, coords$alpha),
-        fontsize = coords$size * .pt + pt_stroke * .stroke / 2,
-        lwd      = pt_stroke * .stroke / 2
+        col      = ggplot2::alpha(coords$fill, coords$alpha),
+        fontsize = coords$size * ggplot2::.pt + pt_stroke * ggplot2::.stroke / 2,
+        lwd      = pt_stroke * ggplot2::.stroke / 2
       )
     )
 
@@ -383,14 +384,14 @@ calculate_trace_size <- function(data) {
   pch       <- data$shape
 
   # Calculate fontsize for closed shapes
-  fontsize  <- data$size * .pt + pt_stroke * .stroke / 2
+  fontsize  <- data$size * ggplot2::.pt + pt_stroke * ggplot2::.stroke / 2
 
-  fontsize[!pch %in% pch_open] <- fontsize[!pch %in% pch_open] + data$stroke * .stroke / 2
+  fontsize[!pch %in% pch_open] <- fontsize[!pch %in% pch_open] + data$stroke * ggplot2::.stroke / 2
 
   # Calculate lwd for open shapes
-  lwd <- data$stroke * .stroke / 2
+  lwd <- data$stroke * ggplot2::.stroke / 2
 
-  lwd[pch %in% pch_open] <- lwd[pch %in% pch_open] * 2 + (pt_stroke * .stroke / 2)
+  lwd[pch %in% pch_open] <- lwd[pch %in% pch_open] * 2 + (pt_stroke * ggplot2::.stroke / 2)
 
   # Add results to data
   data$trace_fontsize <- fontsize

R/ggtrace-package.R

@@ -14,12 +14,5 @@
 #'
 #' @name ggtrace
 #' @docType package
-#' @import ggplot2
-#' @importFrom grid
-#'   gpar
-#'   pointsGrob
-#'   grobName
-#'   grobTree
-#' @importFrom rlang on_load
 #' @keywords internal
 "_PACKAGE"

R/utilities-ggplot2.R

@@ -134,7 +134,6 @@ modify_list <- function(old, new) {
 # Info needed for rbind_dfs date/time handling
 ggtrace_global <- new.env(parent = emptyenv())
 
-#' @importFrom rlang on_load
 #' @noRd
 rlang::on_load({
   date <- Sys.Date()

tests/testthat.R

@@ -1,5 +1,6 @@
 library(testthat)
 library(vdiffr)
 library(ggtrace)
+library(ggplot2)
 
 test_check("ggtrace")