Bring back legends (#27)

* draft base legend

* add base legend tests

* document `guide_legend_base()`

* rename file

* text setup can take position directly

* export GuideLegendBase

* stabilise grabbing attributes

* implement `guide_legend_cross()`

* add tests for cross legend

* replace `dim_order` by `swap`

* document cross legend

* draft `key_split_group`

* lut key

* add lut group test

* small utility

* reintroduce guide_legend_group

* add group legend tests

* add `legendry.group.spacing` as element

* small tweaks

* document

NAMESPACE

@@ -11,6 +11,8 @@ export(GizmoGrob)
 export(GizmoHistogram)
 export(GizmoStepcap)
 export(GuideColring)
+export(GuideLegendBase)
+export(GuideLegendGroup)
 export(PrimitiveBox)
 export(PrimitiveBracket)
 export(PrimitiveFence)
@@ -45,8 +47,13 @@ export(guide_axis_nested)
 export(guide_colbar)
 export(guide_colring)
 export(guide_colsteps)
+export(guide_legend_base)
+export(guide_legend_cross)
+export(guide_legend_group)
 export(key_auto)
 export(key_bins)
+export(key_group_lut)
+export(key_group_split)
 export(key_log)
 export(key_manual)
 export(key_map)

R/compose-crux.R

@@ -105,7 +105,7 @@ ComposeCrux <- ggproto(
   ),
 
   setup_elements = function(params, elements, theme) {
-    elements$title <- setup_legend_title(theme, params$direction)
+    elements$title <- setup_legend_title(theme, direction = params$direction)
     theme <- theme + params$theme
     Guide$setup_elements(params, elements, theme)
   },
@@ -204,7 +204,7 @@ ComposeCrux <- ggproto(
         gt,
         title = self$build_title(params$title, elems, params),
         position = elems$title_position,
-        with(elems$title, rotate_just(angle, hjust, vjust))
+        get_just(elems$title)
       )
       if (!is.null(elems$margin)) {
         gt <- gtable_add_padding(gt, elems$margin)