Class: Nyaplot::Plot

Inherits:
Object
  • Object
show all
Includes:
ChartMethods, Exportable
Defined in:
lib/nyaplot/plot.rb

Constant Summary

Constants included from Exportable

Exportable::PATH_NYAPLOT

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from ChartMethods

#add_annotation, #add_arrow, #add_circle, #add_rect, #add_text

Methods included from Exportable

#export_html, #generate_html, #raise_display_failed, #show, #to_iruby, #to_png

Constructor Details

#initialize(df = nil, **opts) ⇒ Plot

Returns a new instance of Plot.


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# File 'lib/nyaplot/plot.rb', line 22

def initialize(df=nil, **opts)
  @df = df
  @opts = {
    width: 400,
    height: 400
  }.merge(opts)

  wh = {
    width: @opts[:width],
    height: @opts[:height]
  }
  
  @xdomain = nil
  @ydomain = nil
  
  ## internal use
  @glyphs = []
  @charts = []
  @deps = []
  @temp_deps = []

  ## properties
  @x_axis_h = 35
  @y_axis_w = 70
  @with_layer
  @is_interactive = true
  
  ## layers
  @stage = ad ::Layers::Stage.new({})
  @context = ad ::Layers::Context.new(wh)
  @background = ad ::Layers::Background.new(
    {
      width: wh[:width]+4,
      height: wh[:height]+4,
      dx: -2,
      dy: -2
    })
  
  @xscale = ad ::Layers::Scale.new({type: nil, range: [0, @opts[:width]]})
  @yscale = ad ::Layers::Scale.new({type: nil, range: [@opts[:height], 0]})

  @xaxis = ad ::Layers::Axis.new({scale: @xscale, height: @x_axis_h})
  @yaxis = ad ::Layers::Axis.new({scale: @yscale, orient: :left, width: @y_axis_w})

  @grid = ad ::Layers::Grid.new({xscale: @xscale, yscale: @yscale})
  @position = ad ::Layers::Position2d.new({x: @xscale, y: @yscale})
  @wheel_zoom = ad ::Layers::Wheelzoom.new({xscale: @xscale, yscale: @yscale, updates: [@grid, @xaxis, @yaxis]}.merge(wh))

  arg = {
    dx: (@y_axis_w/2),
    text: "",
    font_size: 26,
    text_anchor: :start,
    yalign: :center,
    xalign: :center,
    margin: {top: 0, bottom: 20, left: 5, right: 5}
  }
  @title = ad ::Layers::Label.new(arg)
  @xlabel = nil
  @ylabel = nil
end

Instance Attribute Details

#backgroundObject

Returns the value of attribute background


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# File 'lib/nyaplot/plot.rb', line 14

def background
  @background
end

#gridObject

Returns the value of attribute grid


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# File 'lib/nyaplot/plot.rb', line 14

def grid
  @grid
end

#xaxisObject

Returns the value of attribute xaxis


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# File 'lib/nyaplot/plot.rb', line 14

def xaxis
  @xaxis
end

#yaxisObject

Returns the value of attribute yaxis


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# File 'lib/nyaplot/plot.rb', line 14

def yaxis
  @yaxis
end

Class Method Details

.from(df, **opts) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 17

def from(df, **opts)
  Plot.new(df, **opts)
end

Instance Method Details

#add(chart_type, xarr = nil, yarr = nil, **opts) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 103

def add(chart_type, xarr=nil, yarr=nil, **opts)
  self.send(chart_type, @opts.merge(opts))
  self
end

#add_dependency(layer) ⇒ Object Also known as: ad


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# File 'lib/nyaplot/plot.rb', line 84

def add_dependency(layer)
  raise "Layer should be an instance of LayerBase" unless layer.is_a? ::Layers::LayerBase
  @deps.push(layer)
  layer
end

#add_temp_dependency(layer) ⇒ Object Also known as: atd


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# File 'lib/nyaplot/plot.rb', line 92

def add_temp_dependency(layer)
  @temp_deps.push(layer)
  layer
end

#add_with_df(df, chart_type, xlabel, ylabel) ⇒ Object

deprecated.


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# File 'lib/nyaplot/plot.rb', line 109

def add_with_df(df, chart_type, xlabel, ylabel)
  # TODO
  self
end

#clear_temp_dependencyObject


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# File 'lib/nyaplot/plot.rb', line 99

def clear_temp_dependency
  @temp_deps = []
end

#column(r, l, opts = {}) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 170

def column(r, l, opts={})
  r = r.to_node if r.is_a? ::Layers::LayerBase
  l = l.to_node if l.is_a? ::Layers::LayerBase
  cl = atd ::Layers::Column.new(opts)
  cl.to_node([r, l])
end

#decide_domain(arrs, scale_type) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 194

def decide_domain(arrs, scale_type)
  if scale_type.nil?
    scale_type = (arrs.all?{|arr| arr.length==2 && arr.all?{|v| v.is_a?(Numeric)}}) ? "linear" : "ordinal"
  end

  [scale_type, (case scale_type.to_s
   when "time" then
     [] # TODO
   when "ordinal"then
     arrs.flatten.uniq
   when "linear", "pow", "log" then
     [
       arrs.map{|arr| arr[0]}.min,
       arrs.map{|arr| arr[1]}.max
     ]
   end)]
end

#decide_xdomain(scale_type) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 184

def decide_xdomain(scale_type)
  arrs = @charts.map{|c| c.xdomain}
  decide_domain(arrs, scale_type)
end

#decide_ydomain(scale_type) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 189

def decide_ydomain(scale_type)
  arrs = @charts.map{|c| c.ydomain}
  decide_domain(arrs, scale_type)
end

#row(t, b, opts = {}) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 177

def row(t, b, opts={})
  t = t.to_node if t.is_a? ::Layers::LayerBase
  b = b.to_node if b.is_a? ::Layers::LayerBase
  rw = atd ::Layers::Row.new(opts)
  rw.to_node([t, b])
end

#stack(me, children) ⇒ Object

s methods for #to_json ##


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# File 'lib/nyaplot/plot.rb', line 165

def stack(me, children)
  children = children.map{|c| c.is_a?(::Layers::LayerBase) ? c.to_node([]) : c}
  me.to_node(children)
end

#title(txt) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 114

def title(txt)
  @title.text(txt)
  self
end

#to_json(*args) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 212

def to_json(*args)
  ## decide domain
  xscale_, xdomain = @xdomain.nil? ? decide_xdomain(@xscale.type) : [@xscale.type, @xdomain]
  yscale_, ydomain = @ydomain.nil? ? decide_ydomain(@yscale.type) : [@yscale.type, @ydomain]
  @xscale.type xscale_
  @xscale.domain xdomain
  @yscale.type yscale_
  @yscale.domain ydomain
  
  ## create layout tree
  c = stack(@context, @glyphs)
  c = stack(@grid, [c])
  c = stack(@background, [c])
  # c = stack(@tooltip, [c])
  if xscale_ != "ordinal" && yscale_ != "ordinal"
    @wheel_zoom.updates(@wheel_zoom.updates + @glyphs)
    c = stack(@wheel_zoom, [c]) 
  end
  c = column(@yaxis, row(c, @xaxis), {margin: {top: 10, bottom: 15, left: 15, right: 15}})
  c = row(c, @xlabel) unless @xlabel.nil?
  c = column(@ylabel, c) unless @ylabel.nil?
  #c = column(c, @legend)
  c = row(@title, c) unless @title.nil?
  c = stack(@stage, [c])
  c[:parser_type] = "svg"

  defs = @deps + @temp_deps + @glyphs
  clear_temp_dependency
  
  {
    uuid: SecureRandom.uuid,
    defs: defs,
    layout: c
  }.to_json
end

#xdomain(arr) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 153

def xdomain(arr)
  @xdomain = arr
  self
end

#xlabel(txt) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 119

def xlabel(txt)
  arg = {
    dx: @y_axis_w/2,
    text: txt,
    xalign: :center,
    dominant_baseline: "text-before-edge"
  }
  @xlabel = ad ::Layers::Label.new(arg)
  self
end

#xscale(type) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 141

def xscale(type)
  raise "Not supported." unless [:time, :linear, :log, :pow, :ordinal].index type
  @xscale.type type
  self
end

#ydomain(arr) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 158

def ydomain(arr)
  @ydomain = arr
  self
end

#ylabel(txt) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 130

def ylabel(txt)
  arg = {
    text: txt,
    rotate: -90,
    xalign: :center,
    yalign: :center
  }
  @ylabel = ad ::Layers::Label.new(arg)
  self
end

#yscale(type) ⇒ Object


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# File 'lib/nyaplot/plot.rb', line 147

def yscale(type)
  raise "Not supported." unless [:time, :linear, :log, :pow, :ordinal].index type
  @yscale.type type
  self
end