Guide_shapekey

NEWS.md

@@ -3,8 +3,8 @@ This is a log of major changes in Gadfly between releases. It is not exhaustive.
 Each release typically has a number of minor bug fixes beyond what is listed here.
 
 # Version 0.7.1
-
-  * `Geom.contour`: add support for `DataFrame` (#1150)
+  * Add `Guide.shapekey` (#1156)
+  * `Geom.contour`: add support for `DataFrame` (#1150) 
 
 # Version 0.7.0
 

docs/src/lib/guides/guide_shapekey.md

@@ -0,0 +1,34 @@
+```@meta
+Author = "Mattriks"
+```
+
+# Guide.shapekey
+
+`Guide.shapekey` enables control of the fields of the auto-generated shapekey. Currently, you can change the shapekey title, the item labels, and position the shapekey inside the plot. The fields can be named e.g. `Guide.shapekey(title="Group", labels=["A","B"], pos=[0w,0h])`, or given in order e.g. `Guide.shapekey("Group", ["A","B"], [0w,0h])`.
+
+## Arguments
+  * `title`: Legend title
+  * `labels`: Legend item labels
+  * `pos`: [x,y] position of the shapekey inside the plot. Setting `Guide.shapekey(pos=)` will override the `Theme(key_position=)` setting. Setting `Theme(key_position=:inside)` without setting `pos` will place the key in the lower right quadrant of the plot.
+
+## Examples
+
+```@setup 1
+using RDatasets
+using Compose
+using Gadfly
+Gadfly.set_default_plot_size(16cm, 8cm)
+```
+
+```@example 1
+Dsleep = dataset("ggplot2", "msleep")
+Dsleep = dropmissing!(Dsleep[[:Vore, :Name,:BrainWt,:BodyWt, :SleepTotal]])
+Dsleep[:SleepTime] = Dsleep[:SleepTotal] .> 8
+plot(Dsleep, x=:BodyWt, y=:BrainWt, Geom.point, color=:Vore, shape=:SleepTime,
+    Guide.colorkey(pos=[0.05w, -0.25h]),
+    Guide.shapekey(title="Sleep (hrs)", labels=[">8","≤8"], pos=[0.18w,-0.315h]),
+    Scale.x_log10, Scale.y_log10,
+    Theme(point_size=2mm, key_swatch_color="slategrey", point_shapes=[Shape.utriangle, Shape.dtriangle]),
+)
+
+```

docs/src/man/themes.md

@@ -65,6 +65,8 @@ These parameters can either be used with `Theme` or `style`
   * `key_label_font_size`: Font size used for key entry labels. (Measure)
   * `key_label_color`: Color used for key entry labels. (Color)
   * `key_max_columns`: Maximum number of columns for key entry labels. (Int)
+  * `key_swatch_shape`: General purpose, will eventually replace `colorkey_swatch_shape` (Function as in `point_shapes`)
+  * `key_swatch_color`: General purpose, currently works for `Guide.shapekey` (Color)
   * `bar_spacing`: Spacing between bars in [`Geom.bar`](@ref). (Measure)
   * `boxplot_spacing`: Spacing between boxplots in [`Geom.boxplot`](@ref). (Measure)
   * `errorbar_cap_length`: Length of caps on error bars. (Measure)

src/Gadfly.jl

@@ -637,20 +637,35 @@ function render_prepare(plot::Plot)
     layer_aess = Scale.apply_scales(IterTools.distinct(values(scales)),
                                     datas..., subplot_datas...)
 
-    # set default labels
-    for (i, layer) in enumerate(plot.layers)
-        if layer_aess[i].color_key_title == nothing &&
-           haskey(layer.mapping, :color) &&
-           !isa(layer.mapping[:color], AbstractArray)
-           layer_aess[i].color_key_title = string(layer.mapping[:color])
-       end
+    # set defaults for key titles
+    keyvars = [:color, :shape]
+    for (i, layer) in enumerate(plot.layers) 
+        for kv in keyvars    
+            fflag = (getfield(layer_aess[i], Symbol(kv,"_key_title")) == nothing) && haskey(layer.mapping, kv) && !isa(layer.mapping[kv], AbstractArray)    
+            fflag && setfield!(layer_aess[i], Symbol(kv,"_key_title"), string(layer.mapping[kv]))
+        end
+    end
+
+    for kv in keyvars    
+        fflag = (getfield(layer_aess[1], Symbol(kv,"_key_title")) == nothing) && haskey(plot.mapping, kv) && !isa(plot.mapping[kv], AbstractArray) 
+        fflag && setfield!(layer_aess[1], Symbol(kv,"_key_title"), string(plot.mapping[kv]))
     end
 
-    if layer_aess[1].color_key_title == nothing &&
-       haskey(plot.mapping, :color) && !isa(plot.mapping[:color], AbstractArray)
-        layer_aess[1].color_key_title = string(plot.mapping[:color])
+    # Auto-update color scale if shape==color
+    catdatas = vcat(datas, subplot_datas)
+    shapev = getfield.(catdatas, :shape)
+    di = (shapev.!=nothing) .& (shapev.== getfield.(catdatas, :color))
+
+    supress_colorkey = false
+    for (aes, data) in zip(layer_aess[di], catdatas[di])
+        aes.shape_key_title==nothing && (aes.shape_key_title=aes.color_key_title="Shape") 
+        colorf = scales[:color].f
+        scales[:color] =  Scale.color_discrete(colorf, levels=scales[:shape].levels, order=scales[:shape].order)
+        Scale.apply_scale(scales[:color], [aes], Gadfly.Data(color=getfield(data,:color))  )     
+        supress_colorkey=true
     end
 
+
     # IIa. Layer-wise statistics
     if !facet_plot
         for (stats, aes) in zip(layer_stats, layer_aess)
@@ -664,20 +679,25 @@ function render_prepare(plot::Plot)
     Stat.apply_statistics(statistics, scales, coord, plot_aes)
 
     # Add some default guides determined by defined aesthetics
-    supress_colorkey = false
+    keytypes = [Guide.ColorKey, Guide.ShapeKey]
+    supress_keys = false
     for layer in plot.layers
-        if isa(layer.geom, Geom.SubplotGeometry) &&
-                haskey(layer.geom.guides, Guide.ColorKey)
-            supress_colorkey = true
+        if isa(layer.geom, Geom.SubplotGeometry) && any(haskey.(layer.geom.guides, keytypes))
+            supress_keys = true
             break
         end
     end
 
-    if !supress_colorkey &&
-       !all([aes.color === nothing for aes in [plot_aes, layer_aess...]]) &&
-       !in(Guide.ColorKey, explicit_guide_types) &&
-       !in(Guide.ManualColorKey, explicit_guide_types)
-        push!(guides, Guide.colorkey())
+    if supress_colorkey
+        deleteat!(keytypes, 1)
+        deleteat!(keyvars, 1)
+    end
+
+    if !supress_keys
+        for (KT, kv) in zip(keytypes, keyvars)
+            fflag = !all([getfield(aes, kv)==nothing for aes in [plot_aes, layer_aess...]])
+            fflag && !in(KT, explicit_guide_types) &&  push!(guides, KT())
+        end
     end
 
     # build arrays of scaled aesthetics for layers within subplots

src/aesthetics.jl

@@ -60,6 +60,7 @@ const NumericalAesthetic =
     color_key_continuous, Maybe(Bool)
     color_function,       Maybe(Function)
     titles,               Maybe(Dict{Symbol, AbstractString})
+    shape_key_title,    Maybe(AbstractString)
 
     # mark some ticks as initially invisible
     xtickvisible,         Maybe(Vector{Bool})
@@ -83,6 +84,7 @@ const NumericalAesthetic =
     color_label,  Function, showoff
     xgroup_label, Function, showoff
     ygroup_label, Function, showoff
+    shape_label, Function, showoff
 
     # pseudo-aesthetics
     pad_categorical_x, Nullable{Bool}, Nullable{Bool}()

src/guide.jl

@@ -366,7 +366,7 @@ function render_continuous_color_key(colors::Dict,
 end
 
 
-function render_colorkey_title(title::AbstractString, theme::Gadfly.Theme)
+function render_key_title(title::AbstractString, theme::Gadfly.Theme)
     title_width, title_height = max_text_extents(theme.key_title_font,
                                                  theme.key_title_font_size,
                                                  title)
@@ -443,7 +443,7 @@ function render(guide::ColorKey, theme::Gadfly.Theme,
         pretty_labels[color] = join(labels[color], ", ")
     end
 
-    title_context, title_width = render_colorkey_title(guide_title, theme)
+    title_context, title_width = render_key_title(guide_title, theme)
 
     theme.colorkey_swatch_shape != :circle && theme.colorkey_swatch_shape != :square &&
             error("$(theme.colorkey_swatch_shape) is not a valid color key swatch shape")
@@ -523,7 +523,7 @@ function render(guide::ManualColorKey, theme::Gadfly.Theme,
         guide_title = "Color"
     end
 
-    title_context, title_width = render_colorkey_title(guide_title, theme)
+    title_context, title_width = render_key_title(guide_title, theme)
 
     labels = OrderedDict{Color, AbstractString}()
     for (c, l) in zip(guide.colors, guide.labels)
@@ -1254,4 +1254,7 @@ function render(guide::Annotation, theme::Gadfly.Theme,
 end
 
 
-end # module Guide
+include("guide/keys.jl")
+
+
+end # module Guide

src/guide/keys.jl

@@ -0,0 +1,170 @@
+
+
+
+##### NEW KEYS #####
+
+struct ShapeKey <: Gadfly.GuideElement
+    title::AbstractString
+    labels::Vector{String}
+    pos::Vector
+end
+ShapeKey(;title="Shape", labels=[""], pos=Float64[]) = ShapeKey(title, labels, pos)
+
+const shapekey = ShapeKey
+
+
+
+function Guide.render(guide::Guide.ShapeKey, theme::Gadfly.Theme, aes::Gadfly.Aesthetics)
+
+    (theme.key_position == :none) && return Gadfly.Guide.PositionedGuide[]
+    gpos = guide.pos
+    (theme.key_position == :inside) && (gpos == Float64[]) &&  (gpos = [0.7w, 0.25h])
+
+    # Aesthetics for keys: shape_key_title, shape_label (Function), shape_key_shapes (Associative)    
+    nshapes = length(unique(aes.shape))
+    guide_title = (guide.title!="Shape" || aes.shape_key_title==nothing) ? guide.title : aes.shape_key_title
+    shape_key_labels = !(guide.labels==[""]) ? guide.labels : aes.shape_label(1:nshapes)
+
+    colors = [nothing]
+    if (aes.shape_key_title !=nothing)  && (aes.color_key_title==aes.shape_key_title)
+        colors = collect(keys(aes.color_key_colors))
+    end
+
+    title_context, title_width = Guide.render_key_title(guide_title, theme)
+    ctxs = render_discrete_key(shape_key_labels, title_context, title_width, theme, shapes=1:nshapes, colors=colors)
+
+    position = right_guide_position
+    if gpos != Float64[]
+        position = over_guide_position
+        ctxs = [compose(context(), (context(gpos[1],gpos[2]), ctxs[1]))]
+    elseif theme.key_position == :left
+        position = left_guide_position
+    elseif theme.key_position == :top
+        position = top_guide_position
+    elseif theme.key_position == :bottom
+        position = bottom_guide_position
+    end
+
+    return [Guide.PositionedGuide(ctxs, 0, position)]
+end
+
+
+
+
+
+
+
+
+function render_discrete_key(labels::Vector{String}, title_ctx::Context, title_width::Measure, theme::Gadfly.Theme; 
+    colors=[nothing], aes_color_label=nothing, shapes=[nothing])
+
+    n = max(length(colors), length(shapes))
+    shape1 = shapes[1]
+    shapes = (shape1==nothing) ? fill(theme.key_swatch_shape, n) : theme.point_shapes[shapes]
+    (colors[1]==nothing) && (colors = fill((theme.key_swatch_color==nothing) ? theme.default_color : theme.key_swatch_color, n))
+
+    # only consider layouts with a reasonable number of columns
+    maxcols = theme.key_max_columns < 1 ? 1 : theme.key_max_columns
+    maxcols = min(n, maxcols)
+
+    extents = text_extents(theme.key_label_font,
+                        theme.key_label_font_size,
+                        values(labels)...)
+
+    ypad = 1.0mm
+    title_height = title_ctx.box.a[2]
+    entry_height = maximum([height for (width, height) in extents]) + ypad
+    swatch_size = entry_height / 2
+
+    # return a context with a lyout of numcols columns
+    function make_layout(numcols)
+        colrows = Array{Int}(numcols)
+        m = n
+        for i in 1:numcols
+            colrows[i] = min(m, ceil(Integer, (n / numcols)))
+            m -= colrows[i]
+        end
+
+        xpad = 1mm
+        colwidths = Array{Measure}(numcols)
+        m = 0
+        for (i, nrows) in enumerate(colrows)
+            if m == n
+                colwidths[i] = 0mm
+            else
+                colwidth = maximum([width for (width, height) in extents[m+1:m+nrows]])
+                colwidth += swatch_size + 2xpad
+                colwidths[i] = colwidth
+                m += nrows
+            end
+        end
+
+        ctxwidth = sum(colwidths)
+        ctxheight = entry_height * colrows[1] + title_height
+
+        ctxp = ctxpromise() do draw_context
+            yoff = 0.5h - ctxheight/2
+            outerctx = context()
+
+            compose!(outerctx, (context(xpad, yoff), title_ctx))
+
+            ctx = context(0, yoff + title_height,
+                        ctxwidth, ctxheight - title_height,
+                        units=UnitBox(0, 0, 1, colrows[1]))
+
+            m = 0
+            xpos = 0w
+            for (i, nrows) in enumerate(colrows)
+                colwidth = colwidths[i]
+
+                x = [0.5cy]
+                clrs = colors[m+1:m+nrows]
+                shps = shapes[m+1:m+nrows]
+                swatches_shapes = [f(x, [y].*cy, [swatch_size/1.5]) for (y,f) in enumerate(shps)]
+                sw1 = [(context(), s, fill(c)) for (s,c) in zip(swatches_shapes, clrs)]
+                swatches = compose!(context(), sw1...)
+
+                swatch_labels = compose!(
+                    context(),
+                    text([2xpad + swatch_size], [y*cy for y in 1:nrows],
+                        collect(values(labels))[m+1:m+nrows], [hleft], [vcenter]),
+                    font(theme.key_label_font),
+                    fontsize(theme.key_label_font_size),
+                    fill(theme.key_label_color))
+
+                col = compose!(context(xpos, yoff), swatches, swatch_labels)
+                if aes_color_label != nothing
+                    classes = [svg_color_class_from_label(aes_color_label([c])[1]) for c in clrs]
+                    #class_jscalls = ["data(\"color_class\", \"$(c)\")" for c in classes]
+                    compose!(col,
+                        svgclass(classes),
+                        jscall(["""
+                            data(\"color_class\", \"$(c)\")
+                            .click(Gadfly.colorkey_swatch_click)
+                            """ for c in classes]))
+                end
+                compose!(ctx, col)
+
+                m += nrows
+                xpos += colwidths[i]
+            end
+
+            return compose!(outerctx, ctx,
+                            # defeat webkit's asinine default drag behavior
+                            jscall("drag(function() {}, function() {}, function() {})"),
+                            svgclass("guide colorkey"))
+        end
+
+        return compose!(
+            context(minwidth=max(title_width, ctxwidth),
+                    minheight=ctxheight,
+                    units=UnitBox()),
+            ctxp)
+    end
+
+    return map(make_layout, 1:maxcols)
+end
+
+
+
+

src/theme.jl

@@ -175,6 +175,12 @@ end
     # Shape used in color keys for color swatches. Either :square or :circle.
     colorkey_swatch_shape, Symbol,          :square
 
+    # Shape used in keys for swatches.
+    key_swatch_shape,       Function,        Shape.square
+
+    # Default color used in keys for swatches.
+    key_swatch_color,       ColorOrNothing,        nothing
+
     # One of :left, :right, :top, :bottom, :inside, :none determining where color keys
     # and the like should be placed.
     key_position,          Symbol,          :right

test/testscripts/Guide_shapekey.jl

@@ -0,0 +1,25 @@
+using Compose, DataFrames, Gadfly
+
+set_default_plot_size(9inch, 3.3inch)
+
+srand(123)
+theme1 = Theme(point_size=3mm)
+coord1 = Coord.cartesian(xmin=0.0, xmax=6.0)
+D = DataFrame(x=1:5, y=rand(5), V1=["A","A","B","B","D"], V2 = string.([1,2,2,3,3])  )
+
+
+pa = plot(x=1:5, y=[0.77, 0.94, 0.67, 0.39, 0.31], shape=["A","A","B","B","D"], theme1, coord1,
+    Guide.shapekey(title="Key",labels=["α","β","δ"]),
+    Guide.title("Guide.shapekey") )
+
+pb = plot(D, x=:x, y=:y, shape=:V1, color=:V1,
+        Scale.shape_discrete(levels=["D","A","B"]),     
+        theme1, coord1, Guide.title("Shape==Color") )
+
+pc = plot(D, x=:x, y=:y, shape=:V1, color=:V2,  coord1,
+        Guide.colorkey(title="Color"),
+        Guide.shapekey(title="Shape ", pos=[0.74w,-0.27h]),
+        Theme(point_size=3mm, key_swatch_color="slategrey"),
+        Guide.title("Shape!=Color") )
+
+hstack(pa,pb,pc)