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# frozen_string_literal: true
module Axlsx
# The LineChart is a two dimentional line chart (who would have guessed?) that you can add to your worksheet.
# @example Creating a chart
# # This example creates a line in a single sheet.
# require "rubygems" # if that is your preferred way to manage gems!
# require "axlsx"
#
# p = Axlsx::Package.new
# ws = p.workbook.add_worksheet
# ws.add_row ["This is a chart with no data in the sheet"]
#
# chart = ws.add_chart(Axlsx::LineChart, :start_at=> [0,1], :end_at=>[0,6], :title=>"Most Popular Pets")
# chart.add_series :data => [1, 9, 10], :labels => ["Slimy Reptiles", "Fuzzy Bunnies", "Rottweiler"]
#
# @see Worksheet#add_chart
# @see Worksheet#add_row
# @see Chart#add_series
# @see Series
# @see Package#serialize
class LineChart < Chart
# the category axis
# @return [CatAxis]
def cat_axis
axes[:cat_axis]
end
alias :catAxis :cat_axis
# the category axis
# @return [ValAxis]
def val_axis
axes[:val_axis]
end
alias :valAxis :val_axis
# must be one of [:percentStacked, :clustered, :standard, :stacked]
# @return [Symbol]
attr_reader :grouping
# Creates a new line chart object
# @param [GraphicFrame] frame The workbook that owns this chart.
# @option options [Cell, String] title
# @option options [Boolean] show_legend
# @option options [Symbol] grouping
# @see Chart
def initialize(frame, options = {})
@vary_colors = false
@grouping = :standard
super(frame, options)
@series_type = LineSeries
@d_lbls = nil
end
# @see grouping
def grouping=(v)
RestrictionValidator.validate "LineChart.grouping", [:percentStacked, :standard, :stacked], v
@grouping = v
end
# The node name to use in serialization. As LineChart is used as the
# base class for Liine3DChart we need to be sure to serialize the
# chart based on the actual class type and not a fixed node name.
# @return [String]
def node_name
path = self.class.name
if i = path.rindex('::')
path = path[(i + 2)..-1]
end
path[0] = path[0].chr.downcase
path
end
# Serializes the object
# @param [String] str
# @return [String]
def to_xml_string(str = +'')
super(str) do
str << "<c:" << node_name << ">"
str << '<c:grouping val="' << grouping.to_s << '"/>'
str << '<c:varyColors val="' << vary_colors.to_s << '"/>'
@series.each { |ser| ser.to_xml_string(str) }
@d_lbls.to_xml_string(str) if @d_lbls
yield if block_given?
axes.to_xml_string(str, ids: true)
str << "</c:" << node_name << ">"
axes.to_xml_string(str)
end
end
# The axes for this chart. LineCharts have a category and value
# axis.
# @return [Axes]
def axes
@axes ||= Axes.new(cat_axis: CatAxis, val_axis: ValAxis)
end
end
end
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