labels_hash[0] = starttime.min.to_s
labels_hash[(numcols/2)-1] = (starttime + (timedelta/2)).min.to_s
labels_hash[numcols-1] = Time.now.min.to_s
- interval_type = "Minutes"
+ interval_type = "Minute of the Hour"
elsif timedelta < 2.days #more than 2 hours means use hours for labels
labels_hash[0] = starttime.hour.to_s
labels_hash[(numcols/2)-1] = (starttime + (timedelta/2)).hour.to_s
labels_hash[numcols-1] = Time.now.hour.to_s
- interval_type = "Hours"
+ interval_type = "Hour of the Day on 24 hour scale"
else #more than 2 days means use dates for labels
labels_hash[0] = (Date.parse(starttime.to_s)).to_s
labels_hash[(numcols/2)-1] = (Date.parse(starttime + (timedelta/2))).to_s
labels_hash[numcols-1] = (Date.today).to_s
- interval_type = "Days"
+ interval_type = "The Date"
end
# Make sure to return an array for data and hash for labels
+++ /dev/null
-Copyright (c) 2006 Geoffrey Grosenbach
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+++ /dev/null
-== Gruff Plugin
-
-Make pretty graphs.
-
-Also has a "gruff" generator for copying a controller and functional test to your app.
-
- ./script/generate gruff Reports
-
-See examples at http://nubyonrails.com/pages/gruff
-
-== Author
-
-Geoffrey Grosenbach boss@topfunky.com http://nubyonrails.com
-
-
+++ /dev/null
-require 'rake'
-require 'rake/testtask'
-require 'rake/rdoctask'
-
-desc 'Default: run unit tests.'
-task :default => :test
-
-desc 'Test the plugin.'
-Rake::TestTask.new(:test) do |t|
- t.libs << 'lib'
- t.pattern = 'test/**/test_*.rb'
- t.verbose = true
-end
-
-desc 'Generate documentation for the plugin.'
-Rake::RDocTask.new(:rdoc) do |rdoc|
- rdoc.rdoc_dir = 'rdoc'
- rdoc.title = 'CalendarHelper'
- rdoc.options << '--line-numbers' << '--inline-source'
- rdoc.rdoc_files.include('README')
- rdoc.rdoc_files.include('lib/**/*.rb')
-end
-
+++ /dev/null
-author: topfunky
-summary: Make graphs. Requires RMagick. Includes a generator for a graphics controller, and tests.
-homepage: http://nubyonrails.com/pages/gruff
-plugin: http://topfunky.net/svn/plugins/gruff
-license: MIT
-version: 0.1.2
-rails_version: 1.0+
+++ /dev/null
-class GruffGenerator < Rails::Generator::NamedBase
-
- attr_reader :controller_name,
- :controller_class_path,
- :controller_file_path,
- :controller_class_nesting,
- :controller_class_nesting_depth,
- :controller_class_name,
- :controller_singular_name,
- :controller_plural_name,
- :parent_folder_for_require
- alias_method :controller_file_name, :controller_singular_name
- alias_method :controller_table_name, :controller_plural_name
-
- def initialize(runtime_args, runtime_options = {})
- super
-
- # Take controller name from the next argument.
- @controller_name = runtime_args.shift
-
- base_name, @controller_class_path, @controller_file_path, @controller_class_nesting, @controller_class_nesting_depth = extract_modules(@controller_name)
- @controller_class_name_without_nesting, @controller_singular_name, @controller_plural_name = inflect_names(base_name)
-
- if @controller_class_nesting.empty?
- @controller_class_name = @controller_class_name_without_nesting
- else
- @controller_class_name = "#{@controller_class_nesting}::#{@controller_class_name_without_nesting}"
- end
- end
-
- def manifest
- record do |m|
- # Check for class naming collisions.
- m.class_collisions controller_class_path, "#{controller_class_name}Controller",
- "#{controller_class_name}ControllerTest"
-
- # Controller, helper, views, and test directories.
- m.directory File.join('app/controllers', controller_class_path)
- m.directory File.join('test/functional', controller_class_path)
-
- m.template 'controller.rb',
- File.join('app/controllers',
- controller_class_path,
- "#{controller_file_name}_controller.rb")
-
- # For some reason this doesn't take effect if done in initialize()
- @parent_folder_for_require = @controller_class_path.join('/').gsub(%r%app/controllers/?%, '')
- @parent_folder_for_require += @parent_folder_for_require.blank? ? '' : '/'
-
- m.template 'functional_test.rb',
- File.join('test/functional',
- controller_class_path,
- "#{controller_file_name}_controller_test.rb")
-
- end
- end
-
- protected
- # Override with your own usage banner.
- def banner
- "Usage: #{$0} gruff ControllerName"
- end
-end
+++ /dev/null
-class <%= controller_class_name %>Controller < ApplicationController
-
- # To make caching easier, add a line like this to config/routes.rb:
- # map.graph "graph/:action/:id/image.png", :controller => "graph"
- #
- # Then reference it with the named route:
- # image_tag graph_url(:action => 'show', :id => 42)
-
- def show
- g = Gruff::Line.new
- # Uncomment to use your own theme or font
- # See http://colourlovers.com or http://www.firewheeldesign.com/widgets/ for color ideas
-# g.theme = {
-# :colors => ['#663366', '#cccc99', '#cc6633', '#cc9966', '#99cc99'],
-# :marker_color => 'white',
-# :background_colors => ['black', '#333333']
-# }
-# g.font = File.expand_path('artwork/fonts/VeraBd.ttf', RAILS_ROOT)
-
- g.title = "Gruff-o-Rama"
-
- g.data("Apples", [1, 2, 3, 4, 4, 3])
- g.data("Oranges", [4, 8, 7, 9, 8, 9])
- g.data("Watermelon", [2, 3, 1, 5, 6, 8])
- g.data("Peaches", [9, 9, 10, 8, 7, 9])
-
- g.labels = {0 => '2004', 2 => '2005', 4 => '2006'}
-
- send_data(g.to_blob, :disposition => 'inline', :type => 'image/png', :filename => "gruff.png")
- end
-
-end
+++ /dev/null
-require File.dirname(__FILE__) + '<%= '/..' * controller_class_name.split("::").length %>/test_helper'
-require '<%= parent_folder_for_require %><%= controller_file_name %>_controller'
-
-# Re-raise errors caught by the controller.
-class <%= controller_class_name %>Controller; def rescue_action(e) raise e end; end
-
-class <%= controller_class_name %>ControllerTest < Test::Unit::TestCase
-
- #fixtures :data
-
- def setup
- @controller = <%= controller_class_name %>Controller.new
- @request = ActionController::TestRequest.new
- @response = ActionController::TestResponse.new
- end
-
- # TODO Replace this with your actual tests
- def test_show
- get :show
- assert_response :success
- assert_equal 'image/png', @response.headers['Content-Type']
- end
-
-end
+++ /dev/null
-# Extra full path added to fix loading errors on some installations.
-
-%w(
- base
- area
- bar
- line
- pie
- spider
- net
- stacked_bar
- side_stacked_bar
- side_bar
- accumulator_bar
-
- scene
-
- mini/legend
- mini/bar
- mini/pie
- mini/side_bar
-).each do |filename|
- require File.dirname(__FILE__) + "/gruff/#{filename}"
-end
+++ /dev/null
-require File.dirname(__FILE__) + '/base'
-
-##
-# A special bar graph that shows a single dataset as a set of
-# stacked bars. The bottom bar shows the running total and
-# the top bar shows the new value being added to the array.
-
-class Gruff::AccumulatorBar < Gruff::StackedBar
-
- def draw
- raise(Gruff::IncorrectNumberOfDatasetsException) unless @data.length == 1
-
- accumulator_array = []
- index = 0
-
- increment_array = @data.first[DATA_VALUES_INDEX].inject([]) {|memo, value|
- memo << ((index > 0) ? (value + memo.max) : value)
- accumulator_array << memo[index] - value
- index += 1
- memo
- }
- data "Accumulator", accumulator_array
-
- super
- end
-
-end
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-
-class Gruff::Area < Gruff::Base
-
- def draw
- super
-
- return unless @has_data
-
- @x_increment = @graph_width / (@column_count - 1).to_f
- @d = @d.stroke 'transparent'
-
- @norm_data.each do |data_row|
- poly_points = Array.new
- prev_x = prev_y = 0.0
- @d = @d.fill data_row[DATA_COLOR_INDEX]
-
- data_row[1].each_with_index do |data_point, index|
- # Use incremented x and scaled y
- new_x = @graph_left + (@x_increment * index)
- new_y = @graph_top + (@graph_height - data_point * @graph_height)
-
- if prev_x > 0 and prev_y > 0 then
- poly_points << new_x
- poly_points << new_y
-
- #@d = @d.polyline(prev_x, prev_y, new_x, new_y)
- else
- poly_points << @graph_left
- poly_points << @graph_bottom - 1
- poly_points << new_x
- poly_points << new_y
-
- #@d = @d.polyline(@graph_left, @graph_bottom, new_x, new_y)
- end
-
- draw_label(new_x, index)
-
- prev_x = new_x
- prev_y = new_y
- end
-
- # Add closing points, draw polygon
- poly_points << @graph_right
- poly_points << @graph_bottom - 1
- poly_points << @graph_left
- poly_points << @graph_bottom - 1
-
- @d = @d.polyline(*poly_points)
-
- end
-
- @d.draw(@base_image)
- end
-
-
-end
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-require File.dirname(__FILE__) + '/bar_conversion'
-
-class Gruff::Bar < Gruff::Base
-
- def draw
- # Labels will be centered over the left of the bar if
- # there are more labels than columns. This is basically the same
- # as where it would be for a line graph.
- @center_labels_over_point = (@labels.keys.length > @column_count ? true : false)
-
- super
- return unless @has_data
-
- draw_bars
- end
-
-protected
-
- def draw_bars
- # Setup spacing.
- #
- # Columns sit side-by-side.
- spacing_factor = 0.9 # space between the bars
- @bar_width = @graph_width / (@column_count * @data.length).to_f
-
- @d = @d.stroke_opacity 0.0
-
- # Setup the BarConversion Object
- conversion = Gruff::BarConversion.new()
- conversion.graph_height = @graph_height
- conversion.graph_top = @graph_top
-
- # Set up the right mode [1,2,3] see BarConversion for further explanation
- if @minimum_value >= 0 then
- # all bars go from zero to positiv
- conversion.mode = 1
- else
- # all bars go from 0 to negativ
- if @maximum_value <= 0 then
- conversion.mode = 2
- else
- # bars either go from zero to negativ or to positiv
- conversion.mode = 3
- conversion.spread = @spread
- conversion.minimum_value = @minimum_value
- conversion.zero = -@minimum_value/@spread
- end
- end
-
- # iterate over all normalised data
- @norm_data.each_with_index do |data_row, row_index|
-
- data_row[1].each_with_index do |data_point, point_index|
- # Use incremented x and scaled y
- # x
- left_x = @graph_left + (@bar_width * (row_index + point_index + ((@data.length - 1) * point_index)))
- right_x = left_x + @bar_width * spacing_factor
- # y
- conv = []
- conversion.getLeftYRightYscaled( data_point, conv )
-
- # create new bar
- @d = @d.fill data_row[DATA_COLOR_INDEX]
- @d = @d.rectangle(left_x, conv[0], right_x, conv[1])
-
- # Calculate center based on bar_width and current row
- label_center = @graph_left +
- (@data.length * @bar_width * point_index) +
- (@data.length * @bar_width / 2.0)
- # Subtract half a bar width to center left if requested
- draw_label(label_center - (@center_labels_over_point ? @bar_width / 2.0 : 0.0), point_index)
- end
-
- end
-
- # Draw the last label if requested
- draw_label(@graph_right, @column_count) if @center_labels_over_point
-
- @d.draw(@base_image)
- end
-
-end
+++ /dev/null
-##
-# Original Author: David Stokar
-#
-# This class perfoms the y coordinats conversion for the bar class.
-#
-# There are three cases:
-#
-# 1. Bars all go from zero in positive direction
-# 2. Bars all go from zero to negative direction
-# 3. Bars either go from zero to positive or from zero to negative
-#
-class Gruff::BarConversion
- attr_writer :mode
- attr_writer :zero
- attr_writer :graph_top
- attr_writer :graph_height
- attr_writer :minimum_value
- attr_writer :spread
-
- def getLeftYRightYscaled( data_point, result )
- case @mode
- when 1 then # Case one
- # minimum value >= 0 ( only positiv values )
- result[0] = @graph_top + @graph_height*(1 - data_point) + 1
- result[1] = @graph_top + @graph_height - 1
- when 2 then # Case two
- # only negativ values
- result[0] = @graph_top + 1
- result[1] = @graph_top + @graph_height*(1 - data_point) - 1
- when 3 then # Case three
- # positiv and negativ values
- val = data_point-@minimum_value/@spread
- if ( data_point >= @zero ) then
- result[0] = @graph_top + @graph_height*(1 - (val-@zero)) + 1
- result[1] = @graph_top + @graph_height*(1 - @zero) - 1
- else
- result[0] = @graph_top + @graph_height*(1 - (val-@zero)) + 1
- result[1] = @graph_top + @graph_height*(1 - @zero) - 1
- end
- else
- result[0] = 0.0
- result[1] = 0.0
- end
- end
-
-end
+++ /dev/null
-#
-# = Gruff. Graphs.
-#
-# Author:: Geoffrey Grosenbach boss@topfunky.com
-#
-# Originally Created:: October 23, 2005
-#
-# Extra thanks to Tim Hunter for writing RMagick,
-# and also contributions by
-# Jarkko Laine, Mike Perham, Andreas Schwarz,
-# Alun Eyre, Guillaume Theoret, David Stokar,
-# Paul Rogers, Dave Woodward, Frank Oxener,
-# Kevin Clark, Cies Breijs, Richard Cowin,
-# and a cast of thousands.
-#
-
-require 'rubygems'
-require 'RMagick'
-require File.dirname(__FILE__) + '/deprecated'
-
-module Gruff
-
- VERSION = '0.2.9'
-
- class Base
-
- include Magick
- include Deprecated
-
- # Draw extra lines showing where the margins and text centers are
- DEBUG = false
-
- # Used for navigating the array of data to plot
- DATA_LABEL_INDEX = 0
- DATA_VALUES_INDEX = 1
- DATA_COLOR_INDEX = 2
-
- # Blank space around the edges of the graph
- TOP_MARGIN = BOTTOM_MARGIN = RIGHT_MARGIN = LEFT_MARGIN = 20.0
-
- # Space around text elements. Mostly used for vertical spacing
- LEGEND_MARGIN = TITLE_MARGIN = LABEL_MARGIN = 10.0
-
- DEFAULT_TARGET_WIDTH = 800
-
- # A hash of names for the individual columns, where the key is the array index for the column this label represents.
- #
- # Not all columns need to be named.
- #
- # Example: 0 => 2005, 3 => 2006, 5 => 2007, 7 => 2008
- attr_accessor :labels
-
- # Used internally for spacing.
- #
- # By default, labels are centered over the point they represent.
- attr_accessor :center_labels_over_point
-
- # Used internally for horizontal graph types.
- attr_accessor :has_left_labels
-
- # A label for the bottom of the graph
- attr_accessor :x_axis_label
-
- # A label for the left side of the graph
- attr_accessor :y_axis_label
-
- # attr_accessor :x_axis_increment
-
- # Manually set increment of the horizontal marking lines
- attr_accessor :y_axis_increment
-
- # Get or set the list of colors that will be used to draw the bars or lines.
- attr_accessor :colors
-
- # The large title of the graph displayed at the top
- attr_accessor :title
-
- # Font used for titles, labels, etc. Works best if you provide the full path to the TTF font file.
- # RMagick must be built with the Freetype libraries for this to work properly.
- #
- # Tries to find Bitstream Vera (Vera.ttf) in the location specified by
- # ENV['MAGICK_FONT_PATH']. Uses default RMagick font otherwise.
- #
- # The font= method below fulfills the role of the writer, so we only need
- # a reader here.
- attr_reader :font
-
- attr_accessor :font_color
-
- # Hide various elements
- attr_accessor :hide_line_markers, :hide_legend, :hide_title, :hide_line_numbers
-
- # Message shown when there is no data. Fits up to 20 characters. Defaults to "No Data."
- attr_accessor :no_data_message
-
- # The font size of the large title at the top of the graph
- attr_accessor :title_font_size
-
- # Optionally set the size of the font. Based on an 800x600px graph. Default is 20.
- #
- # Will be scaled down if graph is smaller than 800px wide.
- attr_accessor :legend_font_size
-
- # The font size of the labels around the graph
- attr_accessor :marker_font_size
-
- # The color of the auxiliary lines
- attr_accessor :marker_color
-
- # The number of horizontal lines shown for reference
- attr_accessor :marker_count
-
-
- # You can manually set a minimum value instead of having the values guessed for you.
- #
- # Set it after you have given all your data to the graph object.
- attr_accessor :minimum_value
-
- # You can manually set a maximum value, such as a percentage-based graph that always goes to 100.
- #
- # If you use this, you must set it after you have given all your data to the graph object.
- attr_accessor :maximum_value
-
- # Set to false if you don't want the data to be sorted with largest avg values at the back.
- attr_accessor :sort
-
- # Experimental
- attr_accessor :additional_line_values
-
- # Experimental
- attr_accessor :stacked
-
-
- # Optionally set the size of the colored box by each item in the legend. Default is 20.0
- #
- # Will be scaled down if graph is smaller than 800px wide.
- attr_accessor :legend_box_size
-
-
- # If one numerical argument is given, the graph is drawn at 4/3 ratio according to the given width (800 results in 800x600, 400 gives 400x300, etc.).
- #
- # Or, send a geometry string for other ratios ('800x400', '400x225').
- #
- # Looks for Bitstream Vera as the default font. Expects an environment var of MAGICK_FONT_PATH to be set. (Uses RMagick's default font otherwise.)
- def initialize(target_width=DEFAULT_TARGET_WIDTH)
-
- if not Numeric === target_width
- geometric_width, geometric_height = target_width.split('x')
- @columns = geometric_width.to_f
- @rows = geometric_height.to_f
- else
- @columns = target_width.to_f
- @rows = target_width.to_f * 0.75
- end
-
- initialize_ivars
-
- reset_themes
- theme_keynote
- end
-
- ##
- # Set instance variables for this object.
- #
- # Subclasses can override this, call super, then set values separately.
- #
- # This makes it possible to set defaults in a subclass but still allow
- # developers to change this values in their program.
-
- def initialize_ivars
- # Internal for calculations
- @raw_columns = 800.0
- @raw_rows = 800.0 * (@rows/@columns)
- @column_count = 0
- @marker_count = nil
- @maximum_value = @minimum_value = nil
- @has_data = false
- @data = Array.new
- @labels = Hash.new
- @labels_seen = Hash.new
- @sort = true
- @title = nil
-
- @scale = @columns / @raw_columns
-
- vera_font_path = File.expand_path('Vera.ttf', ENV['MAGICK_FONT_PATH'])
- @font = File.exists?(vera_font_path) ? vera_font_path : nil
-
- @marker_font_size = 21.0
- @legend_font_size = 20.0
- @title_font_size = 36.0
-
- @legend_box_size = 20.0
-
- @no_data_message = "No Data"
-
- @hide_line_markers = @hide_legend = @hide_title = @hide_line_numbers = false
- @center_labels_over_point = true
- @has_left_labels = false
-
- @additional_line_values = []
- @additional_line_colors = []
- @theme_options = {}
-
- @x_axis_label = @y_axis_label = nil
- @y_axis_increment = nil
- @stacked = nil
- @norm_data = nil
- end
-
- def font=(font_path)
- @font = font_path
- @d.font = @font
- end
-
- # Add a color to the list of available colors for lines.
- #
- # Example:
- # add_color('#c0e9d3')
- def add_color(colorname)
- @colors << colorname
- end
-
-
- # Replace the entire color list with a new array of colors. You need to have one more color
- # than the number of datasets you intend to draw. Also aliased as the colors= setter method.
- #
- # Example:
- # replace_colors('#cc99cc', '#d9e043', '#34d8a2')
- def replace_colors(color_list=[])
- @colors = color_list
- end
-
-
- # You can set a theme manually. Assign a hash to this method before you send your data.
- #
- # graph.theme = {
- # :colors => %w(orange purple green white red),
- # :marker_color => 'blue',
- # :background_colors => %w(black grey)
- # }
- #
- # :background_image => 'squirrel.png' is also possible.
- #
- # (Or hopefully something better looking than that.)
- #
- def theme=(options)
- reset_themes()
-
- defaults = {
- :colors => ['black', 'white'],
- :additional_line_colors => [],
- :marker_color => 'white',
- :font_color => 'black',
- :background_colors => nil,
- :background_image => nil
- }
- @theme_options = defaults.merge options
-
- @colors = @theme_options[:colors]
- @marker_color = @theme_options[:marker_color]
- @font_color = @theme_options[:font_color] || @marker_color
- @additional_line_colors = @theme_options[:additional_line_colors]
-
- render_background
- end
-
- # A color scheme similar to the popular presentation software.
- def theme_keynote
- # Colors
- @blue = '#6886B4'
- @yellow = '#FDD84E'
- @green = '#72AE6E'
- @red = '#D1695E'
- @purple = '#8A6EAF'
- @orange = '#EFAA43'
- @white = 'white'
- @colors = [@yellow, @blue, @green, @red, @purple, @orange, @white]
-
- self.theme = {
- :colors => @colors,
- :marker_color => 'white',
- :font_color => 'white',
- :background_colors => ['black', '#4a465a']
- }
- end
-
- # A color scheme plucked from the colors on the popular usability blog.
- def theme_37signals
- # Colors
- @green = '#339933'
- @purple = '#cc99cc'
- @blue = '#336699'
- @yellow = '#FFF804'
- @red = '#ff0000'
- @orange = '#cf5910'
- @black = 'black'
- @colors = [@yellow, @blue, @green, @red, @purple, @orange, @black]
-
- self.theme = {
- :colors => @colors,
- :marker_color => 'black',
- :font_color => 'black',
- :background_colors => ['#d1edf5', 'white']
- }
- end
-
- # A color scheme from the colors used on the 2005 Rails keynote presentation at RubyConf.
- def theme_rails_keynote
- # Colors
- @green = '#00ff00'
- @grey = '#333333'
- @orange = '#ff5d00'
- @red = '#f61100'
- @white = 'white'
- @light_grey = '#999999'
- @black = 'black'
- @colors = [@green, @grey, @orange, @red, @white, @light_grey, @black]
-
- self.theme = {
- :colors => @colors,
- :marker_color => 'white',
- :font_color => 'white',
- :background_colors => ['#0083a3', '#0083a3']
- }
- end
-
- # A color scheme similar to that used on the popular podcast site.
- def theme_odeo
- # Colors
- @grey = '#202020'
- @white = 'white'
- @dark_pink = '#a21764'
- @green = '#8ab438'
- @light_grey = '#999999'
- @dark_blue = '#3a5b87'
- @black = 'black'
- @colors = [@grey, @white, @dark_blue, @dark_pink, @green, @light_grey, @black]
-
- self.theme = {
- :colors => @colors,
- :marker_color => 'white',
- :font_color => 'white',
- :background_colors => ['#ff47a4', '#ff1f81']
- }
- end
-
- # A pastel theme
- def theme_pastel
- # Colors
- @colors = [
- '#a9dada', # blue
- '#aedaa9', # green
- '#daaea9', # peach
- '#dadaa9', # yellow
- '#a9a9da', # dk purple
- '#daaeda', # purple
- '#dadada' # grey
- ]
-
- self.theme = {
- :colors => @colors,
- :marker_color => '#aea9a9', # Grey
- :font_color => 'black',
- :background_colors => 'white'
- }
- end
-
- # A greyscale theme
- def theme_greyscale
- # Colors
- @colors = [
- '#282828', #
- '#383838', #
- '#686868', #
- '#989898', #
- '#c8c8c8', #
- '#e8e8e8', #
- ]
-
- self.theme = {
- :colors => @colors,
- :marker_color => '#aea9a9', # Grey
- :font_color => 'black',
- :background_colors => 'white'
- }
- end
-
-
- # Parameters are an array where the first element is the name of the dataset
- # and the value is an array of values to plot.
- #
- # Can be called multiple times with different datasets for a multi-valued graph.
- #
- # If the color argument is nil, the next color from the default theme will be used.
- #
- # NOTE: If you want to use a preset theme, you must set it before calling data().
- #
- # Example:
- #
- # data("Bart S.", [95, 45, 78, 89, 88, 76], '#ffcc00')
- #
- def data(name, data_points=[], color=nil)
- data_points = Array(data_points) # make sure it's an array
- @data << [name, data_points, (color || increment_color)]
- # Set column count if this is larger than previous counts
- @column_count = (data_points.length > @column_count) ? data_points.length : @column_count
-
- # Pre-normalize
- data_points.each_with_index do |data_point, index|
- next if data_point.nil?
-
- # Setup max/min so spread starts at the low end of the data points
- if @maximum_value.nil? && @minimum_value.nil?
- @maximum_value = @minimum_value = data_point
- end
-
- # TODO Doesn't work with stacked bar graphs
- # Original: @maximum_value = larger_than_max?(data_point, index) ? max(data_point, index) : @maximum_value
- @maximum_value = larger_than_max?(data_point) ? data_point : @maximum_value
- @has_data = true if @maximum_value > 0
-
- @minimum_value = less_than_min?(data_point) ? data_point : @minimum_value
- @has_data = true if @minimum_value < 0
- end
- end
-
- # Writes the graph to a file. Defaults to 'graph.png'
- #
- # Example: write('graphs/my_pretty_graph.png')
- def write(filename="graph.png")
- draw()
- @base_image.write(filename)
- end
-
- # Return the graph as a rendered binary blob.
- def to_blob(fileformat='PNG')
- draw()
- return @base_image.to_blob do
- self.format = fileformat
- end
- end
-
-protected
-
- # Overridden by subclasses to do the actual plotting of the graph.
- #
- # Subclasses should start by calling super() for this method.
- def draw
- make_stacked if @stacked
- setup_drawing
-
- debug {
- # Outer margin
- @d.rectangle( LEFT_MARGIN, TOP_MARGIN,
- @raw_columns - RIGHT_MARGIN, @raw_rows - BOTTOM_MARGIN)
- # Graph area box
- @d.rectangle( @graph_left, @graph_top, @graph_right, @graph_bottom)
- }
- end
-
- ##
- # Calculates size of drawable area and draws the decorations.
- #
- # * line markers
- # * legend
- # * title
-
- def setup_drawing
- # Maybe should be done in one of the following functions for more granularity.
- unless @has_data
- draw_no_data()
- return
- end
-
- normalize()
- setup_graph_measurements()
- sort_norm_data() if @sort # Sort norm_data with avg largest values set first (for display)
-
- draw_legend()
- draw_line_markers()
- draw_axis_labels()
- draw_title
- end
-
- # Make copy of data with values scaled between 0-100
- def normalize(force=false)
- if @norm_data.nil? || force
- @norm_data = []
- return unless @has_data
-
- calculate_spread
-
- @data.each do |data_row|
- norm_data_points = []
- data_row[DATA_VALUES_INDEX].each do |data_point|
- if data_point.nil?
- norm_data_points << nil
- else
- norm_data_points << ((data_point.to_f - @minimum_value.to_f ) / @spread)
- end
- end
- @norm_data << [data_row[DATA_LABEL_INDEX], norm_data_points, data_row[DATA_COLOR_INDEX]]
- end
- end
- end
-
- def calculate_spread
- @spread = @maximum_value.to_f - @minimum_value.to_f
- @spread = @spread > 0 ? @spread : 1
- end
-
- ##
- # Calculates size of drawable area, general font dimensions, etc.
-
- def setup_graph_measurements
- @marker_caps_height = calculate_caps_height(@marker_font_size)
- @title_caps_height = calculate_caps_height(@title_font_size)
- @legend_caps_height = calculate_caps_height(@legend_font_size)
-
- if @hide_line_markers
- (@graph_left,
- @graph_right_margin,
- @graph_bottom_margin) = [LEFT_MARGIN, RIGHT_MARGIN, BOTTOM_MARGIN]
- else
- longest_left_label_width = 0
- if @has_left_labels
- longest_left_label_width = calculate_width(@marker_font_size,
- labels.values.inject('') { |value, memo| (value.to_s.length > memo.to_s.length) ? value : memo }) * 1.25
- else
- longest_left_label_width = calculate_width(@marker_font_size,
- label(@maximum_value.to_f))
- end
-
- # Shift graph if left line numbers are hidden
- line_number_width = @hide_line_numbers && !@has_left_labels ?
- 0.0 :
- (longest_left_label_width + LABEL_MARGIN * 2)
-
- @graph_left = LEFT_MARGIN +
- line_number_width +
- (@y_axis_label.nil? ? 0.0 : @marker_caps_height + LABEL_MARGIN * 2)
- # Make space for half the width of the rightmost column label.
- # Might be greater than the number of columns if between-style bar markers are used.
- last_label = @labels.keys.sort.last.to_i
- extra_room_for_long_label = (last_label >= (@column_count-1) && @center_labels_over_point) ?
- calculate_width(@marker_font_size, @labels[last_label])/2.0 :
- 0
- @graph_right_margin = RIGHT_MARGIN + extra_room_for_long_label
-
- @graph_bottom_margin = BOTTOM_MARGIN +
- @marker_caps_height + LABEL_MARGIN
- end
-
- @graph_right = @raw_columns - @graph_right_margin
- @graph_width = @raw_columns - @graph_left - @graph_right_margin
-
- # When @hide title, leave a TITLE_MARGIN space for aesthetics.
- # Same with @hide_legend
- @graph_top = TOP_MARGIN +
- (@hide_title ? TITLE_MARGIN : @title_caps_height + TITLE_MARGIN * 2) +
- (@hide_legend ? LEGEND_MARGIN : @legend_caps_height + LEGEND_MARGIN * 2)
-
- @graph_bottom = @raw_rows - @graph_bottom_margin -
- (@x_axis_label.nil? ? 0.0 : @marker_caps_height + LABEL_MARGIN)
-
- @graph_height = @graph_bottom - @graph_top
- end
-
- # Draw the optional labels for the x axis and y axis.
- def draw_axis_labels
- unless @x_axis_label.nil?
- # X Axis
- # Centered vertically and horizontally by setting the
- # height to 1.0 and the width to the width of the graph.
- x_axis_label_y_coordinate = @graph_bottom + LABEL_MARGIN * 2 + @marker_caps_height
-
- # TODO Center between graph area
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke('transparent')
- @d.pointsize = scale_fontsize(@marker_font_size)
- @d.gravity = NorthGravity
- @d = @d.annotate_scaled( @base_image,
- @raw_columns, 1.0,
- 0.0, x_axis_label_y_coordinate,
- @x_axis_label, @scale)
- debug { @d.line 0.0, x_axis_label_y_coordinate, @raw_columns, x_axis_label_y_coordinate }
- end
-
- unless @y_axis_label.nil?
- # Y Axis, rotated vertically
- @d.rotation = 90.0
- @d.gravity = CenterGravity
- @d = @d.annotate_scaled( @base_image,
- 1.0, @raw_rows,
- LEFT_MARGIN + @marker_caps_height / 2.0, 0.0,
- @y_axis_label, @scale)
- @d.rotation = -90.0
- end
- end
-
- # Draws horizontal background lines and labels
- def draw_line_markers
- return if @hide_line_markers
-
- @d = @d.stroke_antialias false
-
- if @y_axis_increment.nil?
- # Try to use a number of horizontal lines that will come out even.
- #
- # TODO Do the same for larger numbers...100, 75, 50, 25
- if @marker_count.nil?
- (3..7).each do |lines|
- if @spread % lines == 0.0
- @marker_count = lines
- break
- end
- end
- @marker_count ||= 4
- end
- @increment = (@spread > 0) ? significant(@spread / @marker_count) : 1
- else
- # TODO Make this work for negative values
- @maximum_value = [@maximum_value.ceil, @y_axis_increment].max
- @minimum_value = @minimum_value.floor
- calculate_spread
- normalize(true)
-
- @marker_count = (@spread / @y_axis_increment).to_i
- @increment = @y_axis_increment
- end
- @increment_scaled = @graph_height.to_f / (@spread / @increment)
-
- # Draw horizontal line markers and annotate with numbers
- (0..@marker_count).each do |index|
- y = @graph_top + @graph_height - index.to_f * @increment_scaled
-
- @d = @d.stroke(@marker_color)
- @d = @d.stroke_width 1
- @d = @d.line(@graph_left, y, @graph_right, y)
-
- marker_label = index * @increment + @minimum_value.to_f
-
- unless @hide_line_numbers
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke('transparent')
- @d.pointsize = scale_fontsize(@marker_font_size)
- @d.gravity = EastGravity
-
- # Vertically center with 1.0 for the height
- @d = @d.annotate_scaled( @base_image,
- @graph_left - LABEL_MARGIN, 1.0,
- 0.0, y,
- label(marker_label), @scale)
- end
- end
-
- # # Submitted by a contibutor...the utility escapes me
- # i = 0
- # @additional_line_values.each do |value|
- # @increment_scaled = @graph_height.to_f / (@maximum_value.to_f / value)
- #
- # y = @graph_top + @graph_height - @increment_scaled
- #
- # @d = @d.stroke(@additional_line_colors[i])
- # @d = @d.line(@graph_left, y, @graph_right, y)
- #
- #
- # @d.fill = @additional_line_colors[i]
- # @d.font = @font if @font
- # @d.stroke('transparent')
- # @d.pointsize = scale_fontsize(@marker_font_size)
- # @d.gravity = EastGravity
- # @d = @d.annotate_scaled( @base_image,
- # 100, 20,
- # -10, y - (@marker_font_size/2.0),
- # "", @scale)
- # i += 1
- # end
-
- @d = @d.stroke_antialias true
- end
-
- # Draws a legend with the names of the datasets
- # matched to the colors used to draw them.
- def draw_legend
- return if @hide_legend
-
- @legend_labels = @data.collect {|item| item[DATA_LABEL_INDEX] }
-
- legend_square_width = @legend_box_size # small square with color of this item
-
- # May fix legend drawing problem at small sizes
- @d.font = @font if @font
- @d.pointsize = @legend_font_size
-
- metrics = @d.get_type_metrics(@base_image, @legend_labels.join(''))
- legend_text_width = metrics.width
- legend_width = legend_text_width +
- (@legend_labels.length * legend_square_width * 2.7)
- legend_left = (@raw_columns - legend_width) / 2
- legend_increment = legend_width / @legend_labels.length.to_f
-
- current_x_offset = legend_left
- current_y_offset = @hide_title ?
- TOP_MARGIN + LEGEND_MARGIN :
- TOP_MARGIN +
- TITLE_MARGIN + @title_caps_height +
- LEGEND_MARGIN
-
- debug { @d.line 0.0, current_y_offset, @raw_columns, current_y_offset }
-
- @legend_labels.each_with_index do |legend_label, index|
-
- # Draw label
- @d.fill = @font_color
- @d.font = @font if @font
- @d.pointsize = scale_fontsize(@legend_font_size)
- @d.stroke('transparent')
- @d.font_weight = NormalWeight
- @d.gravity = WestGravity
- @d = @d.annotate_scaled( @base_image,
- @raw_columns, 1.0,
- current_x_offset + (legend_square_width * 1.7), current_y_offset,
- legend_label.to_s, @scale)
-
- # Now draw box with color of this dataset
- @d = @d.stroke('transparent')
- @d = @d.fill @data[index][DATA_COLOR_INDEX]
- @d = @d.rectangle(current_x_offset,
- current_y_offset - legend_square_width / 2.0,
- current_x_offset + legend_square_width,
- current_y_offset + legend_square_width / 2.0)
-
- @d.pointsize = @legend_font_size
- metrics = @d.get_type_metrics(@base_image, legend_label.to_s)
- current_string_offset = metrics.width + (legend_square_width * 2.7)
- current_x_offset += current_string_offset
- end
- @color_index = 0
- end
-
- def draw_title
- return if (@hide_title || @title.nil?)
-
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke('transparent')
- @d.pointsize = scale_fontsize(@title_font_size)
- @d.font_weight = BoldWeight
- @d.gravity = NorthGravity
- @d = @d.annotate_scaled( @base_image,
- @raw_columns, 1.0,
- 0, TOP_MARGIN,
- @title, @scale)
- end
-
- ##
- # Draws column labels below graph, centered over x_offset
- #
- # TODO Allow WestGravity as an option
-
- def draw_label(x_offset, index)
- return if @hide_line_markers
-
- if !@labels[index].nil? && @labels_seen[index].nil?
- y_offset = @graph_bottom + LABEL_MARGIN
-
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke('transparent')
- @d.font_weight = NormalWeight
- @d.pointsize = scale_fontsize(@marker_font_size)
- @d.gravity = NorthGravity
- @d = @d.annotate_scaled(@base_image,
- 1.0, 1.0,
- x_offset, y_offset,
- @labels[index], @scale)
- @labels_seen[index] = 1
- debug { @d.line 0.0, y_offset, @raw_columns, y_offset }
- end
- end
-
- def draw_no_data
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke('transparent')
- @d.font_weight = NormalWeight
- @d.pointsize = scale_fontsize(80)
- @d.gravity = CenterGravity
- @d = @d.annotate_scaled( @base_image,
- @raw_columns, @raw_rows/2.0,
- 0, 10,
- @no_data_message, @scale)
- end
-
- ##
- # Finds the best background to render based on the provided theme options.
- #
- # Creates a @base_image to draw on.
- #
- def render_background
- case @theme_options[:background_colors]
- when Array
- @base_image = render_gradiated_background(*@theme_options[:background_colors])
- when String
- @base_image = render_solid_background(@theme_options[:background_colors])
- else
- @base_image = render_image_background(*@theme_options[:background_image])
- end
- end
-
- ##
- # Make a new image at the current size with a solid +color+.
-
- def render_solid_background(color)
- Image.new(@columns, @rows) {
- self.background_color = color
- }
- end
-
- # Use with a theme definition method to draw a gradiated background.
- def render_gradiated_background(top_color, bottom_color)
- Image.new(@columns, @rows,
- GradientFill.new(0, 0, 100, 0, top_color, bottom_color))
- end
-
- # Use with a theme to use an image (800x600 original) background.
- def render_image_background(image_path)
- image = Image.read(image_path)
- if @scale != 1.0
- image[0].resize!(@scale) # TODO Resize with new scale (crop if necessary for wide graph)
- end
- image[0]
- end
-
- # Use with a theme to make a transparent background
- def render_transparent_background
- Image.new(@columns, @rows) do
- self.background_color = 'transparent'
- end
- end
-
- def reset_themes
- @color_index = 0
- @labels_seen = {}
- @theme_options = {}
-
- @d = Draw.new
- # Scale down from 800x600 used to calculate drawing.
- @d = @d.scale(@scale, @scale)
- end
-
- def scale(value)
- value * @scale
- end
-
- # Return a comparable fontsize for the current graph.
- def scale_fontsize(value)
- new_fontsize = value * @scale
- # return new_fontsize < 10.0 ? 10.0 : new_fontsize
- return new_fontsize
- end
-
- def clip_value_if_greater_than(value, max_value)
- (value > max_value) ? max_value : value
- end
-
- # Overridden by subclasses such as stacked bar.
- def larger_than_max?(data_point, index=0)
- data_point > @maximum_value
- end
-
- def less_than_min?(data_point, index=0)
- data_point < @minimum_value
- end
-
- ##
- # Overridden by subclasses that need it.
- def max(data_point, index)
- data_point
- end
-
- ##
- # Overridden by subclasses that need it.
- def min(data_point, index)
- data_point
- end
-
- def significant(inc)
- return 1.0 if inc == 0 # Keep from going into infinite loop
- factor = 1.0
- while (inc < 10)
- inc *= 10
- factor /= 10
- end
-
- while (inc > 100)
- inc /= 10
- factor *= 10
- end
-
- res = inc.floor * factor
- if (res.to_i.to_f == res)
- res.to_i
- else
- res
- end
- end
-
- # Sort with largest overall summed value at front of array
- # so it shows up correctly in the drawn graph.
- def sort_norm_data
- @norm_data.sort! { |a,b| sums(b[1]) <=> sums(a[1]) }
- end
-
- def sums(data_set)
- total_sum = 0
- data_set.collect {|num| total_sum += num.to_f }
- total_sum
- end
-
- ##
- # Used by StackedBar and child classes.
- #
- # May need to be moved to the StackedBar class.
-
- def get_maximum_by_stack
- # Get sum of each stack
- max_hash = {}
- @data.each do |data_set|
- data_set[DATA_VALUES_INDEX].each_with_index do |data_point, i|
- max_hash[i] = 0.0 unless max_hash[i]
- max_hash[i] += data_point.to_f
- end
- end
-
- # @maximum_value = 0
- max_hash.keys.each do |key|
- @maximum_value = max_hash[key] if max_hash[key] > @maximum_value
- end
- @minimum_value = 0
- end
-
- def make_stacked
- stacked_values = Array.new(@column_count, 0)
- @data.each do |value_set|
- value_set[1].each_with_index do |value, index|
- stacked_values[index] += value
- end
- value_set[1] = stacked_values.dup
- end
- end
-
-private
-
- # Takes a block and draws it if DEBUG is true.
- #
- # debug { @d.rectangle x1, y1, x2, y2 }
- #
- def debug
- if DEBUG
- @d = @d.fill 'transparent'
- @d = @d.stroke 'turquoise'
- @d = yield
- end
- end
-
- def increment_color
- if @color_index == 0
- @color_index += 1
- return @colors[0]
- else
- if @color_index < @colors.length
- @color_index += 1
- return @colors[@color_index - 1]
- else
- # Start over
- @color_index = 0
- return @colors[-1]
- end
- end
- end
-
- ##
- # Return a formatted string representing a number value that should be printed as a label.
-
- def label(value)
- if (@spread.to_f % @marker_count.to_f == 0) || !@y_axis_increment.nil?
- return value.to_i.to_s
- end
-
- if @spread > 10.0
- sprintf("%0i", value)
- elsif @spread >= 3.0
- sprintf("%0.2f", value)
- else
- value.to_s
- end
- end
-
- ##
- # Returns the height of the capital letter 'X' for the current font and size.
- #
- # Not scaled since it deals with dimensions that the regular
- # scaling will handle.
- #
- def calculate_caps_height(font_size)
- @d.pointsize = font_size
- @d.get_type_metrics(@base_image, 'X').height
- end
-
- ##
- # Returns the width of a string at this pointsize.
- #
- # Not scaled since it deals with dimensions that the regular
- # scaling will handle.
- #
- def calculate_width(font_size, text)
- @d.pointsize = font_size
- @d.get_type_metrics(@base_image, text.to_s).width
- end
-
- end # Gruff::Base
-
- class IncorrectNumberOfDatasetsException < StandardError; end
-
-end # Gruff
-
-
-module Magick
-
- class Draw
-
- # Additional method since Draw.scale doesn't affect annotations.
- def annotate_scaled(img, width, height, x, y, text, scale)
- scaled_width = (width * scale) >= 1 ? (width * scale) : 1
- scaled_height = (height * scale) >= 1 ? (height * scale) : 1
-
- self.annotate( img,
- scaled_width, scaled_height,
- x * scale, y * scale,
- text)
- end
-
- end
-
-end # Magick
-
+++ /dev/null
-
-##
-# A mixin for methods that need to be deleted or have been
-# replaced by cleaner code.
-
-module Gruff
- module Deprecated
-
- def scale_measurements
- setup_graph_measurements
- end
-
- def total_height
- @rows + 10
- end
-
- def graph_top
- @graph_top * @scale
- end
-
- def graph_height
- @graph_height * @scale
- end
-
- def graph_left
- @graph_left * @scale
- end
-
- def graph_width
- @graph_width * @scale
- end
-
- # TODO Should be calculate_graph_height
- # def setup_graph_height
- # @graph_height = @graph_bottom - @graph_top
- # end
-
- end
-end
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-
-class Gruff::Line < Gruff::Base
-
- # Draw a dashed line at the given value
- attr_accessor :baseline_value
-
- # Color of the baseline
- attr_accessor :baseline_color
-
- # Hide parts of the graph to fit more datapoints, or for a different appearance.
- attr_accessor :hide_dots, :hide_lines
-
- # Call with target pixel width of graph (800, 400, 300), and/or 'false' to omit lines (points only).
- #
- # g = Gruff::Line.new(400) # 400px wide with lines
- #
- # g = Gruff::Line.new(400, false) # 400px wide, no lines (for backwards compatibility)
- #
- # g = Gruff::Line.new(false) # Defaults to 800px wide, no lines (for backwards compatibility)
- #
- # The preferred way is to call hide_dots or hide_lines instead.
- def initialize(*args)
- raise ArgumentError, "Wrong number of arguments" if args.length > 2
- if args.empty? or ((not Numeric === args.first) && (not String === args.first)) then
- super()
- else
- super args.shift
- end
-
- @hide_dots = @hide_lines = false
- @baseline_color = 'red'
- @baseline_value = nil
- end
-
- def draw
- super
-
- return unless @has_data
-
- # Check to see if more than one datapoint was given. NaN can result otherwise.
- @x_increment = (@column_count > 1) ? (@graph_width / (@column_count - 1).to_f) : @graph_width
-
- if (defined?(@norm_baseline)) then
- level = @graph_top + (@graph_height - @norm_baseline * @graph_height)
- @d = @d.push
- @d.stroke_color @baseline_color
- @d.fill_opacity 0.0
- @d.stroke_dasharray(10, 20)
- @d.stroke_width 5
- @d.line(@graph_left, level, @graph_left + @graph_width, level)
- @d = @d.pop
- end
-
- @norm_data.each do |data_row|
- prev_x = prev_y = nil
-
- data_row[1].each_with_index do |data_point, index|
- new_x = @graph_left + (@x_increment * index)
- next if data_point.nil?
-
- draw_label(new_x, index)
-
- new_y = @graph_top + (@graph_height - data_point * @graph_height)
-
- # Reset each time to avoid thin-line errors
- @d = @d.stroke data_row[DATA_COLOR_INDEX]
- @d = @d.fill data_row[DATA_COLOR_INDEX]
- @d = @d.stroke_opacity 1.0
- @d = @d.stroke_width clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 4), 5.0)
-
- if !@hide_lines and !prev_x.nil? and !prev_y.nil? then
- @d = @d.line(prev_x, prev_y, new_x, new_y)
- end
- circle_radius = clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 2.5), 5.0)
- @d = @d.circle(new_x, new_y, new_x - circle_radius, new_y) unless @hide_dots
-
- prev_x = new_x
- prev_y = new_y
- end
-
- end
-
- @d.draw(@base_image)
- end
-
- def normalize
- @maximum_value = [@maximum_value.to_f, @baseline_value.to_f].max
- super
- @norm_baseline = (@baseline_value.to_f / @maximum_value.to_f) if @baseline_value
- end
-
-end
+++ /dev/null
-##
-#
-# Makes a small bar graph suitable for display at 200px or even smaller.
-#
-module Gruff
- module Mini
-
- class Bar < Gruff::Bar
-
- include Gruff::Mini::Legend
-
- def draw
- @hide_legend = true
- @hide_title = true
- @hide_line_numbers = true
-
- @marker_font_size = 50.0
- @minimum_value = 0.0
- @legend_font_size = 60.0
-
- expand_canvas_for_vertical_legend
-
- super
-
- draw_vertical_legend
- @d.draw(@base_image)
- end
-
- end
-
- end
-end
+++ /dev/null
-module Gruff
- module Mini
- module Legend
-
- ##
- # The canvas needs to be bigger so we can put the legend beneath it.
-
- def expand_canvas_for_vertical_legend
- @original_rows = @raw_rows
- @rows += @data.length * calculate_caps_height(scale_fontsize(@legend_font_size)) * 1.7
- render_background
- end
-
- ##
- # Draw the legend beneath the existing graph.
-
- def draw_vertical_legend
-
- @legend_labels = @data.collect {|item| item[Gruff::Base::DATA_LABEL_INDEX] }
-
- legend_square_width = 40.0 # small square with color of this item
- legend_square_margin = 10.0
- @legend_left_margin = 40.0
- legend_top_margin = 40.0
-
- # May fix legend drawing problem at small sizes
- @d.font = @font if @font
- @d.pointsize = @legend_font_size
-
- current_x_offset = @graph_left + @legend_left_margin
- current_y_offset = @original_rows + legend_top_margin
-
- debug { @d.line 0.0, current_y_offset, @raw_columns, current_y_offset }
-
- @legend_labels.each_with_index do |legend_label, index|
-
- # Draw label
- @d.fill = @font_color
- @d.font = @font if @font
- @d.pointsize = scale_fontsize(@legend_font_size)
- @d.stroke = 'transparent'
- @d.font_weight = Magick::NormalWeight
- @d.gravity = Magick::WestGravity
- @d = @d.annotate_scaled( @base_image,
- @raw_columns, 1.0,
- current_x_offset + (legend_square_width * 1.7), current_y_offset,
- truncate_legend_label(legend_label), @scale)
-
- # Now draw box with color of this dataset
- @d = @d.stroke 'transparent'
- @d = @d.fill @data[index][Gruff::Base::DATA_COLOR_INDEX]
- @d = @d.rectangle(current_x_offset,
- current_y_offset - legend_square_width / 2.0,
- current_x_offset + legend_square_width,
- current_y_offset + legend_square_width / 2.0)
-
- current_y_offset += calculate_caps_height(@legend_font_size) * 1.7
- end
- @color_index = 0
- end
-
- ##
- # Shorten long labels so they will fit on the canvas.
- #
- # Department of Hu...
-
- def truncate_legend_label(label)
- truncated_label = label.to_s
- while calculate_width(scale_fontsize(@legend_font_size), truncated_label) > (@columns - @legend_left_margin - Gruff::Base::RIGHT_MARGIN) && (truncated_label.length > 1)
- truncated_label = truncated_label[0..truncated_label.length-2]
- end
- truncated_label + (truncated_label.length < label.to_s.length ? "…" : '')
- end
-
- end
- end
-end
+++ /dev/null
-##
-#
-# Makes a small pie graph suitable for display at 200px or even smaller.
-#
-module Gruff
- module Mini
-
- class Pie < Gruff::Pie
-
- include Gruff::Mini::Legend
-
- def initialize_ivars
- super
-
- @hide_legend = true
- @hide_title = true
- @hide_line_numbers = true
-
- @marker_font_size = 60.0
- @legend_font_size = 60.0
- end
-
- def draw
- expand_canvas_for_vertical_legend
-
- super
-
- draw_vertical_legend
-
- @d.draw(@base_image)
- end # def draw
-
- end # class Pie
-
- end
-end
+++ /dev/null
-##
-#
-# Makes a small pie graph suitable for display at 200px or even smaller.
-#
-module Gruff
- module Mini
-
- class SideBar < Gruff::SideBar
-
- def initialize_ivars
- super
- @hide_legend = true
- @hide_title = true
- @hide_line_numbers = true
-
- @marker_font_size = 50.0
- end
-
- end
-
- end
-end
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-
-# Experimental!!! See also the Spider graph.
-class Gruff::Net < Gruff::Base
-
- # Hide parts of the graph to fit more datapoints, or for a different appearance.
- attr_accessor :hide_dots
-
- def initialize(*args)
- super
-
- @hide_dots = false
- end
-
- def draw
-
- super
-
- return unless @has_data
-
- @radius = @graph_height / 2.0
- @center_x = @graph_left + (@graph_width / 2.0)
- @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit
-
- @x_increment = @graph_width / (@column_count - 1).to_f
- circle_radius = clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 2.5), 5.0)
-
- @d = @d.stroke_opacity 1.0
- @d = @d.stroke_width clip_value_if_greater_than(@columns / (@norm_data.first[1].size * 4), 5.0)
-
- if (defined?(@norm_baseline)) then
- level = @graph_top + (@graph_height - @norm_baseline * @graph_height)
- @d = @d.push
- @d.stroke_color @baseline_color
- @d.fill_opacity 0.0
- @d.stroke_dasharray(10, 20)
- @d.stroke_width 5
- @d.line(@graph_left, level, @graph_left + @graph_width, level)
- @d = @d.pop
- end
-
- @norm_data.each do |data_row|
- prev_x = prev_y = nil
- @d = @d.stroke data_row[DATA_COLOR_INDEX]
- @d = @d.fill data_row[DATA_COLOR_INDEX]
-
- data_row[1].each_with_index do |data_point, index|
- next if data_point.nil?
-
- rad_pos = index * Math::PI * 2 / @column_count
- point_distance = data_point * @radius
- start_x = @center_x + Math::sin(rad_pos) * point_distance
- start_y = @center_y - Math::cos(rad_pos) * point_distance
-
- next_index = index + 1 < data_row[1].length ? index + 1 : 0
-
- next_rad_pos = next_index * Math::PI * 2 / @column_count
- next_point_distance = data_row[1][next_index] * @radius
- end_x = @center_x + Math::sin(next_rad_pos) * next_point_distance
- end_y = @center_y - Math::cos(next_rad_pos) * next_point_distance
-
- @d = @d.line(start_x, start_y, end_x, end_y)
-
- @d = @d.circle(start_x, start_y, start_x - circle_radius, start_y) unless @hide_dots
- end
-
- end
-
- @d.draw(@base_image)
- end
-
-
- # the lines connecting in the center, with the first line vertical
- def draw_line_markers
- return if @hide_line_markers
-
-
- # have to do this here (AGAIN)... see draw() in this class
- # because this funtion is called before the @radius, @center_x and @center_y are set
- @radius = @graph_height / 2.0
- @center_x = @graph_left + (@graph_width / 2.0)
- @center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit
-
-
- # Draw horizontal line markers and annotate with numbers
- @d = @d.stroke(@marker_color)
- @d = @d.stroke_width 1
-
-
- (0..@column_count-1).each do |index|
- rad_pos = index * Math::PI * 2 / @column_count
-
- @d = @d.line(@center_x, @center_y, @center_x + Math::sin(rad_pos) * @radius, @center_y - Math::cos(rad_pos) * @radius)
-
-
- marker_label = labels[index] ? labels[index].to_s : '000'
-
- draw_label(@center_x, @center_y, rad_pos * 360 / (2 * Math::PI), @radius, marker_label)
- end
- end
-
-private
-
- def draw_label(center_x, center_y, angle, radius, amount)
- r_offset = 1.1
- x_offset = center_x # + 15 # The label points need to be tweaked slightly
- y_offset = center_y # + 0 # This one doesn't though
- x = x_offset + (radius * r_offset * Math.sin(angle.deg2rad))
- y = y_offset - (radius * r_offset * Math.cos(angle.deg2rad))
-
- # Draw label
- @d.fill = @marker_color
- @d.font = @font if @font
- @d.pointsize = scale_fontsize(20)
- @d.stroke = 'transparent'
- @d.font_weight = BoldWeight
- s = angle.deg2rad / (2*Math::PI)
- @d.gravity = SouthGravity if s >= 0.96 or s < 0.04
- @d.gravity = SouthWestGravity if s >= 0.04 or s < 0.21
- @d.gravity = WestGravity if s >= 0.21 or s < 0.29
- @d.gravity = NorthWestGravity if s >= 0.29 or s < 0.46
- @d.gravity = NorthGravity if s >= 0.46 or s < 0.54
- @d.gravity = NorthEastGravity if s >= 0.54 or s < 0.71
- @d.gravity = EastGravity if s >= 0.71 or s < 0.79
- @d.gravity = SouthEastGravity if s >= 0.79 or s < 0.96
-# @d.gravity = NorthGravity
- @d.annotate_scaled(@base_image, 0, 0, x, y, amount, @scale)
- end
-
-end
-
-# # This method is already in Float
-# class Float
-# # Used for degree => radian conversions
-# def deg2rad
-# self * (Math::PI/180.0)
-# end
-# end
-
-
-
+++ /dev/null
-require File.dirname(__FILE__) + '/base'
-
-# EXPERIMENTAL!
-#
-# Doesn't work yet.
-#
-class Gruff::PhotoBar < Gruff::Base
-
-# TODO
-#
-# define base and cap in yml
-# allow for image directory to be located elsewhere
-# more exact measurements for bar heights (go all the way to the bottom of the graph)
-# option to tile images instead of use a single image
-# drop base label a few px lower so photo bar graphs can have a base dropping over the lower marker line
-#
-
- # The name of a pre-packaged photo-based theme.
- attr_reader :theme
-
-# def initialize(target_width=800)
-# super
-# init_photo_bar_graphics()
-# end
-
- def draw
- super
- return unless @has_data
-
- return # TODO Remove for further development
-
- init_photo_bar_graphics()
-
- #Draw#define_clip_path()
- #Draw#clip_path(pathname)
- #Draw#composite....with bar graph image OverCompositeOp
- #
- # See also
- #
- # Draw.pattern # define an image to tile as the filling of a draw object
- #
-
- # Setup spacing.
- #
- # Columns sit side-by-side.
- spacing_factor = 0.9
- @bar_width = @norm_data[0][DATA_COLOR_INDEX].columns
-
- @norm_data.each_with_index do |data_row, row_index|
-
- data_row[1].each_with_index do |data_point, point_index|
- data_point = 0 if data_point.nil?
- # Use incremented x and scaled y
- left_x = @graph_left + (@bar_width * (row_index + point_index + ((@data.length - 1) * point_index)))
- left_y = @graph_top + (@graph_height - data_point * @graph_height) + 1
- right_x = left_x + @bar_width * spacing_factor
- right_y = @graph_top + @graph_height - 1
-
- bar_image_width = data_row[DATA_COLOR_INDEX].columns
- bar_image_height = right_y.to_f - left_y.to_f
-
- # Crop to scale for data
- bar_image = data_row[DATA_COLOR_INDEX].crop(0, 0, bar_image_width, bar_image_height)
-
- @d.gravity = NorthWestGravity
- @d = @d.composite(left_x, left_y, bar_image_width, bar_image_height, bar_image)
-
- # Calculate center based on bar_width and current row
- label_center = @graph_left + (@data.length * @bar_width * point_index) + (@data.length * @bar_width / 2.0)
- draw_label(label_center, point_index)
- end
-
- end
-
- @d.draw(@base_image)
- end
-
-
- # Return the chosen theme or the default
- def theme
- @theme || 'plastik'
- end
-
-protected
-
- # Sets up colors with a list of images that will be used.
- # Images should be 340px tall
- def init_photo_bar_graphics
- color_list = Array.new
- theme_dir = File.dirname(__FILE__) + '/../../assets/' + theme
-
- Dir.open(theme_dir).each do |file|
- next unless /\.png$/.match(file)
- color_list << Image.read("#{theme_dir}/#{file}").first
- end
- @colors = color_list
- end
-
-end
-
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-
-class Gruff::Pie < Gruff::Base
-
- TEXT_OFFSET_PERCENTAGE = 0.15
-
- # Can be used to make the pie start cutting slices at the top (-90.0)
- # or at another angle. Default is 0.0, which starts at 3 o'clock.
- attr_accessor :zero_degree
-
- def initialize_ivars
- super
- @zero_degree = 0.0
- end
-
- def draw
- @hide_line_markers = true
-
- super
-
- return unless @has_data
-
- diameter = @graph_height
- radius = ([@graph_width, @graph_height].min / 2.0) * 0.8
- top_x = @graph_left + (@graph_width - diameter) / 2.0
- center_x = @graph_left + (@graph_width / 2.0)
- center_y = @graph_top + (@graph_height / 2.0) - 10 # Move graph up a bit
- total_sum = sums_for_pie()
- prev_degrees = @zero_degree
-
- # Use full data since we can easily calculate percentages
- @data.sort{ |a, b| a[DATA_VALUES_INDEX][0] <=> b[DATA_VALUES_INDEX][0] }.each do |data_row|
- if data_row[DATA_VALUES_INDEX][0] > 0
- @d = @d.stroke data_row[DATA_COLOR_INDEX]
- @d = @d.fill 'transparent'
- @d.stroke_width(radius) # stroke width should be equal to radius. we'll draw centered on (radius / 2)
-
- current_degrees = (data_row[DATA_VALUES_INDEX][0] / total_sum) * 360.0
-
- # ellipse will draw the the stroke centered on the first two parameters offset by the second two.
- # therefore, in order to draw a circle of the proper diameter we must center the stroke at
- # half the radius for both x and y
- @d = @d.ellipse(center_x, center_y,
- radius / 2.0, radius / 2.0,
- prev_degrees, prev_degrees + current_degrees + 0.5) # <= +0.5 'fudge factor' gets rid of the ugly gaps
-
- half_angle = prev_degrees + ((prev_degrees + current_degrees) - prev_degrees) / 2
-
- # End the string with %% to escape the single %.
- # RMagick must use sprintf with the string and % has special significance.
- label_string = ((data_row[DATA_VALUES_INDEX][0] / total_sum) * 100.0).round.to_s + '%%'
- @d = draw_label(center_x,center_y,
- half_angle, radius + (radius * TEXT_OFFSET_PERCENTAGE),
- label_string)
-
- prev_degrees += current_degrees
- end
- end
-
- # TODO debug a circle where the text is drawn...
-
- @d.draw(@base_image)
- end
-
-private
-
- ##
- # Labels are drawn around a slightly wider ellipse to give room for
- # labels on the left and right.
- def draw_label(center_x, center_y, angle, radius, amount)
- # TODO Don't use so many hard-coded numbers
- r_offset = 20.0 # The distance out from the center of the pie to get point
- x_offset = center_x # + 15.0 # The label points need to be tweaked slightly
- y_offset = center_y # This one doesn't though
- radius_offset = (radius + r_offset)
- ellipse_factor = radius_offset * 0.15
- x = x_offset + ((radius_offset + ellipse_factor) * Math.cos(angle.deg2rad))
- y = y_offset + (radius_offset * Math.sin(angle.deg2rad))
-
- # Draw label
- @d.fill = @font_color
- @d.font = @font if @font
- @d.pointsize = scale_fontsize(@marker_font_size)
- @d.stroke = 'transparent'
- @d.font_weight = BoldWeight
- @d.gravity = CenterGravity
- @d.annotate_scaled( @base_image,
- 0, 0,
- x, y,
- amount, @scale)
- end
-
- def sums_for_pie
- total_sum = 0.0
- @data.collect {|data_row| total_sum += data_row[DATA_VALUES_INDEX][0] }
- total_sum
- end
-
-end
-
-
-class Float
- # Used for degree => radian conversions
- def deg2rad
- self * (Math::PI/180.0)
- end
-end
+++ /dev/null
-
-require "observer"
-require File.dirname(__FILE__) + '/base'
-
-##
-# A scene is a non-linear graph that assembles layers together to tell a story.
-# Layers are folders with appropriately named files (see below). You can group
-# layers and control them together or just set their values individually.
-#
-# Examples:
-#
-# * A city scene that changes with the time of day and the weather conditions.
-# * A traffic map that shows red lines on streets that are crowded and green on free-flowing ones.
-#
-# Usage:
-#
-# g = Gruff::Scene.new("500x100", "artwork/city_scene")
-# g.layers = %w(background haze sky clouds)
-# g.weather_group = %w(clouds)
-# g.time_group = %w(background sky)
-# g.weather = "cloudy"
-# g.time = Time.now
-# g.haze = true
-# g.write "hazy_daytime_city_scene.png"
-#
-#
-#
-# If there is a file named 'default.png', it will be selected (unless other values are provided to override it).
-#
-class Gruff::Scene < Gruff::Base
-
- # An array listing the foldernames that will be rendered, from back to front.
- #
- # g.layers = %w(sky clouds buildings street people)
- #
- attr_reader :layers
-
- def initialize(target_width, base_dir)
- @base_dir = base_dir
- @groups = {}
- @layers = []
- super target_width
- end
-
- def draw
- # Join all the custom paths and filter out the empty ones
- image_paths = @layers.map { |layer| layer.path }.select { |path| !path.empty? }
- images = Magick::ImageList.new(*image_paths)
- @base_image = images.flatten_images
- end
-
- def layers=(ordered_list)
- ordered_list.each do |layer_name|
- @layers << Gruff::Layer.new(@base_dir, layer_name)
- end
- end
-
- # Group layers to input values
- #
- # g.weather_group = ["sky", "sea", "clouds"]
- #
- # Set input values
- #
- # g.weather = "cloudy"
- #
- def method_missing(method_name, *args)
- case method_name.to_s
- when /^(\w+)_group=$/
- add_group $1, *args
- return
- when /^(\w+)=$/
- set_input $1, args.first
- return
- end
- super
- end
-
-private
-
- def add_group(input_name, layer_names)
- @groups[input_name] = Gruff::Group.new(input_name, @layers.select { |layer| layer_names.include?(layer.name) })
- end
-
- def set_input(input_name, input_value)
- if not @groups[input_name].nil?
- @groups[input_name].send_updates(input_value)
- else
- if chosen_layer = @layers.detect { |layer| layer.name == input_name }
- chosen_layer.update input_value
- end
- end
- end
-
-end
-
-
-class Gruff::Group
-
- include Observable
- attr_reader :name
-
- def initialize(folder_name, layers)
- @name = folder_name
- layers.each do |layer|
- layer.observe self
- end
- end
-
- def send_updates(value)
- changed
- notify_observers value
- end
-
-end
-
-
-class Gruff::Layer
-
- attr_reader :name
-
- def initialize(base_dir, folder_name)
- @base_dir = base_dir.to_s
- @name = folder_name.to_s
- @filenames = Dir.open(File.join(base_dir, folder_name)).entries.select { |file| file =~ /^[^.]+\.png$/ }
- @selected_filename = select_default
- end
-
- # Register this layer so it receives updates from the group
- def observe(obj)
- obj.add_observer self
- end
-
- # Choose the appropriate filename for this layer, based on the input
- def update(value)
- @selected_filename = case value.to_s
- when /^(true|false)$/
- select_boolean value
- when /^(\w|\s)+$/
- select_string value
- when /^-?(\d+\.)?\d+$/
- select_numeric value
- when /(\d\d):(\d\d):\d\d/
- select_time "#{$1}#{$2}"
- else
- select_default
- end
- # Finally, try to use 'default' if we're still blank
- @selected_filename ||= select_default
- end
-
- # Returns the full path to the selected image, or a blank string
- def path
- unless @selected_filename.nil? || @selected_filename.empty?
- return File.join(@base_dir, @name, @selected_filename)
- end
- ''
- end
-
-private
-
- # Match "true.png" or "false.png"
- def select_boolean(value)
- file_exists_or_blank value.to_s
- end
-
- # Match -5 to _5.png
- def select_numeric(value)
- file_exists_or_blank value.to_s.gsub('-', '_')
- end
-
- def select_time(value)
- times = @filenames.map { |filename| filename.gsub('.png', '') }
- times.each_with_index do |time, index|
- if (time > value) && (index > 0)
- return "#{times[index - 1]}.png"
- end
- end
- return "#{times.last}.png"
- end
-
- # Match "partly cloudy" to "partly_cloudy.png"
- def select_string(value)
- file_exists_or_blank value.to_s.gsub(' ', '_')
- end
-
- def select_default
- @filenames.include?("default.png") ? "default.png" : ''
- end
-
- # Returns the string "#{filename}.png", if it exists.
- #
- # Failing that, it returns default.png, or '' if that doesn't exist.
- def file_exists_or_blank(filename)
- @filenames.include?("#{filename}.png") ? "#{filename}.png" : select_default
- end
-
-end
+++ /dev/null
-require File.dirname(__FILE__) + '/base'
-
-##
-# Graph with individual horizontal bars instead of vertical bars.
-
-class Gruff::SideBar < Gruff::Base
-
- def draw
- @has_left_labels = true
- super
-
- return unless @has_data
-
- # Setup spacing.
- #
- # Columns sit stacked.
- spacing_factor = 0.9
-
- @bar_width = @graph_height / @column_count.to_f
- @d = @d.stroke_opacity 0.0
- height = Array.new(@column_count, 0)
- length = Array.new(@column_count, @graph_left)
-
- @norm_data.each_with_index do |data_row, row_index|
- @d = @d.fill data_row[DATA_COLOR_INDEX]
-
- data_row[1].each_with_index do |data_point, point_index|
-
- # Using the original calcs from the stacked bar chart
- # to get the difference between
- # part of the bart chart we wish to stack.
- temp1 = @graph_left + (@graph_width -
- data_point * @graph_width -
- height[point_index]) + 1
- temp2 = @graph_left + @graph_width - height[point_index] - 1
- difference = temp2 - temp1
-
- left_x = length[point_index] #+ 1
- left_y = @graph_top + (@bar_width * point_index)
- right_x = left_x + difference
- right_y = left_y + @bar_width * spacing_factor
-
- length[point_index] += difference
- height[point_index] += (data_point * @graph_width - 2)
-
- @d = @d.rectangle(left_x, left_y, right_x, right_y)
-
- # Calculate center based on bar_width and current row
- label_center = @graph_top + (@bar_width * point_index) + (@bar_width * spacing_factor / 2.0)
- draw_label(label_center, point_index)
- end
-
- end
-
- @d.draw(@base_image)
- end
-
-protected
-
- # Instead of base class version, draws vertical background lines and label
- def draw_line_markers
-
- return if @hide_line_markers
-
- @d = @d.stroke_antialias false
-
- # Draw horizontal line markers and annotate with numbers
- @d = @d.stroke(@marker_color)
- @d = @d.stroke_width 1
- number_of_lines = 5
-
- # TODO Round maximum marker value to a round number like 100, 0.1, 0.5, etc.
- increment = significant(@maximum_value.to_f / number_of_lines)
- (0..number_of_lines).each do |index|
-
- line_diff = (@graph_right - @graph_left) / number_of_lines
- x = @graph_right - (line_diff * index) - 1
- @d = @d.line(x, @graph_bottom, x, @graph_top)
- diff = index - number_of_lines
- marker_label = diff.abs * increment
-
- unless @hide_line_numbers
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke = 'transparent'
- @d.pointsize = scale_fontsize(@marker_font_size)
- @d.gravity = CenterGravity
- # TODO Center text over line
- @d = @d.annotate_scaled( @base_image,
- 0, 0, # Width of box to draw text in
- x, @graph_bottom + (LABEL_MARGIN * 2.0), # Coordinates of text
- marker_label.to_s, @scale)
- end # unless
- @d = @d.stroke_antialias true
- end
- end
-
- ##
- # Draw on the Y axis instead of the X
-
- def draw_label(y_offset, index)
- if !@labels[index].nil? && @labels_seen[index].nil?
- @d.fill = @font_color
- @d.font = @font if @font
- @d.stroke = 'transparent'
- @d.font_weight = NormalWeight
- @d.pointsize = scale_fontsize(@marker_font_size)
- @d.gravity = EastGravity
- @d = @d.annotate_scaled(@base_image,
- 1, 1,
- -@graph_left + LABEL_MARGIN * 2.0, y_offset,
- @labels[index], @scale)
- @labels_seen[index] = 1
- end
- end
-
-end
+++ /dev/null
-require File.dirname(__FILE__) + '/base'
-require File.dirname(__FILE__) + '/side_bar'
-
-##
-# New gruff graph type added to enable sideways stacking bar charts
-# (basically looks like a x/y flip of a standard stacking bar chart)
-#
-# alun.eyre@googlemail.com
-
-class Gruff::SideStackedBar < Gruff::SideBar
-
- def draw
- @has_left_labels = true
- get_maximum_by_stack
- super
-
- return unless @has_data
-
- # Setup spacing.
- #
- # Columns sit stacked.
- spacing_factor = 0.9
-
- @bar_width = @graph_height / @column_count.to_f
- @d = @d.stroke_opacity 0.0
- height = Array.new(@column_count, 0)
- length = Array.new(@column_count, @graph_left)
-
- @norm_data.each_with_index do |data_row, row_index|
- @d = @d.fill data_row[DATA_COLOR_INDEX]
-
- data_row[1].each_with_index do |data_point, point_index|
-
- ## using the original calcs from the stacked bar chart to get the difference between
- ## part of the bart chart we wish to stack.
- temp1 = @graph_left + (@graph_width -
- data_point * @graph_width -
- height[point_index]) + 1
- temp2 = @graph_left + @graph_width - height[point_index] - 1
- difference = temp2 - temp1
-
- left_x = length[point_index] #+ 1
- left_y = @graph_top + (@bar_width * point_index)
- right_x = left_x + difference
- right_y = left_y + @bar_width * spacing_factor
- length[point_index] += difference
- height[point_index] += (data_point * @graph_width - 2)
-
- @d = @d.rectangle(left_x, left_y, right_x, right_y)
-
- # Calculate center based on bar_width and current row
- label_center = @graph_top + (@bar_width * point_index) + (@bar_width * spacing_factor / 2.0)
- draw_label(label_center, point_index)
- end
-
- end
-
- @d.draw(@base_image)
- end
-
- protected
-
- def larger_than_max?(data_point, index=0)
- max(data_point, index) > @maximum_value
- end
-
- def max(data_point, index)
- @data.inject(0) {|sum, item| sum + item[1][index]}
- end
-
-end
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-
-# Experimental!!! See also the Net graph.
-#
-# Submitted by Kevin Clark http://glu.ttono.us/
-class Gruff::Spider < Gruff::Base
-
- # Hide all text
- attr_reader :hide_text
- attr_accessor :hide_axes
- attr_reader :transparent_background
-
- def transparent_background=(value)
- @transparent_background = value
- @base_image = render_transparent_background if value
- end
-
- def hide_text=(value)
- @hide_title = @hide_text = value
- end
-
- def initialize(max_value, target_width = 800)
- super(target_width)
- @max_value = max_value
- @hide_legend = true;
- end
-
- def draw
- @hide_line_markers = true
-
- super
-
- return unless @has_data
-
- # Setup basic positioning
- diameter = @graph_height
- radius = @graph_height / 2.0
- top_x = @graph_left + (@graph_width - diameter) / 2.0
- center_x = @graph_left + (@graph_width / 2.0)
- center_y = @graph_top + (@graph_height / 2.0) - 25 # Move graph up a bit
-
- @unit_length = radius / @max_value
-
-
- total_sum = sums_for_spider
- prev_degrees = 0.0
- additive_angle = (2 * Math::PI)/ @data.size
-
- current_angle = 0.0
-
- # Draw axes
- draw_axes(center_x, center_y, radius, additive_angle) unless hide_axes
-
- # Draw polygon
- draw_polygon(center_x, center_y, additive_angle)
-
-
- @d.draw(@base_image)
- end
-
-private
-
- def normalize_points(value)
- value * @unit_length
- end
-
- def draw_label(center_x, center_y, angle, radius, amount)
- r_offset = 50 # The distance out from the center of the pie to get point
- x_offset = center_x # The label points need to be tweaked slightly
- y_offset = center_y + 0 # This one doesn't though
- x = x_offset + ((radius + r_offset) * Math.cos(angle))
- y = y_offset + ((radius + r_offset) * Math.sin(angle))
-
- # Draw label
- @d.fill = @marker_color
- @d.font = @font if @font
- @d.pointsize = scale_fontsize(legend_font_size)
- @d.stroke = 'transparent'
- @d.font_weight = BoldWeight
- @d.gravity = CenterGravity
- @d.annotate_scaled( @base_image,
- 0, 0,
- x, y,
- amount, @scale)
- end
-
- def draw_axes(center_x, center_y, radius, additive_angle, line_color = nil)
- return if hide_axes
-
- current_angle = 0.0
-
- @data.each do |data_row|
- @d.stroke(line_color || data_row[DATA_COLOR_INDEX])
- @d.stroke_width 5.0
-
- x_offset = radius * Math.cos(current_angle)
- y_offset = radius * Math.sin(current_angle)
-
- @d.line(center_x, center_y,
- center_x + x_offset,
- center_y + y_offset)
-
- draw_label(center_x, center_y, current_angle, radius, data_row[0].to_s) unless hide_text
-
- current_angle += additive_angle
- end
- end
-
- def draw_polygon(center_x, center_y, additive_angle, color = nil)
- points = []
- current_angle = 0.0
- @data.each do |data_row|
- points << center_x + normalize_points(data_row[1][0]) * Math.cos(current_angle)
- points << center_y + normalize_points(data_row[1][0]) * Math.sin(current_angle)
- current_angle += additive_angle
- end
-
- @d.stroke_width 1.0
- @d.stroke(color || @marker_color)
- @d.fill(color || @marker_color)
- @d.fill_opacity 0.4
- @d.polygon(*points)
- end
-
- def sums_for_spider
- @data.inject(0.0) {|sum, data_row| sum += data_row[1][0]}
- end
-
-end
+++ /dev/null
-
-require File.dirname(__FILE__) + '/base'
-
-class Gruff::StackedBar < Gruff::Base
-
- # Draws a bar graph, but multiple sets are stacked on top of each other.
- def draw
- get_maximum_by_stack
- super
- return unless @has_data
-
- # Setup spacing.
- #
- # Columns sit stacked.
- spacing_factor = 0.9
- @bar_width = @graph_width / @column_count.to_f
-
- @d = @d.stroke_opacity 0.0
-
- height = Array.new(@column_count, 0)
-
- @norm_data.each_with_index do |data_row, row_index|
- @d = @d.fill data_row[DATA_COLOR_INDEX]
-
- data_row[1].each_with_index do |data_point, point_index|
- # Use incremented x and scaled y
- left_x = @graph_left + (@bar_width * point_index)
- left_y = @graph_top + (@graph_height -
- data_point * @graph_height -
- height[point_index]) + 1
- right_x = left_x + @bar_width * spacing_factor
- right_y = @graph_top + @graph_height - height[point_index] - 1
-
- # update the total height of the current stacked bar
- height[point_index] += (data_point * @graph_height - 2)
-
- @d = @d.rectangle(left_x, left_y, right_x, right_y)
-
- # Calculate center based on bar_width and current row
- label_center = @graph_left + (@bar_width * point_index) + (@bar_width * spacing_factor / 2.0)
- draw_label(label_center, point_index)
- end
-
- end
-
- @d.draw(@base_image)
- end
-
-end
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