Class: GoogleVisualr::Image::BarChart

Inherits:
BaseChart
  • Object
show all
Includes:
Packages::ImageChart
Defined in:
lib/google_visualr/image/bar_chart.rb

Overview

code.google.com/apis/chart/interactive/docs/gallery/imagebarchart.html

Constant Summary

Constants included from Packages::ImageChart

Packages::ImageChart::IMAGE_DEFAULTS

Constants inherited from BaseChart

BaseChart::DEFAULT_VERSION

Instance Attribute Summary

Attributes inherited from BaseChart

#data_table, #language, #listeners, #material, #version

Instance Method Summary collapse

Methods included from Packages::ImageChart

#chart_image_url, #class_name, #package_name

Methods inherited from BaseChart

#add_listener, #chart_class, #chart_function_name, #chart_name, #class_name, #draw_js, #initialize, #load_js, #options, #options=, #package_name, #to_js

Methods included from ParamHelpers

#js_parameters, #stringify_keys!, #typecast

Constructor Details

This class inherits a constructor from GoogleVisualr::BaseChart

Instance Method Details

#uri(params = {}) ⇒ Object

Create URI for image bar chart. Override parameters by passing in a hash. (see code.google.com/apis/chart/image/docs/chart_params.html)

Parameters:

*params         [Optional] Hash of url query parameters



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# File 'lib/google_visualr/image/bar_chart.rb', line 16

def uri(params = {})
  query_params = {}
  
  # isStacked/isVertical, Chart Type
  chart_type = "b"
  chart_type += @options["isVertical"] ? "v" : "h"
  chart_type += @options["isStacked"] == false ? "g" : "s"
  query_params[:cht] = chart_type

  # showCategoryLabels (works as long as :chxt => "x,y")
  labels = ""
  val_column = @options["isVertical"] ? 1 : 0
  cat_column = @options["isVertical"] ? 0 : 1
  if @options["showCategoryLabels"] == false
    labels = "#{cat_column}:||"
  else
    labels = "#{cat_column}:|" + data_table.get_column(0).join('|') + "|"
  end
  
  # showValueLabels  (works as long as :chxt => "x,y")
  if @options["showValueLabels"] == false
    labels += "#{val_column}:||"
  end
  
  query_params[:chxl] = labels unless labels.blank?
  
  chart_image_url(query_params.merge(params))
end