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bigdir/lib/SVG/Graph/Schedule.rb

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require 'SVG/Graph/Plot'
require 'parsedate'
module SVG
module Graph
# === For creating SVG plots of scalar temporal data
#
# = Synopsis
#
# require 'SVG/Graph/Schedule'
#
# # Data sets are label, start, end tripples.
# data1 = [
# "Housesitting", "6/17/04", "6/19/04",
# "Summer Session", "6/15/04", "8/15/04",
# ]
#
# graph = SVG::Graph::Schedule.new( {
# :width => 640,
# :height => 480,
# :graph_title => title,
# :show_graph_title => true,
# :no_css => true,
# :scale_x_integers => true,
# :scale_y_integers => true,
# :min_x_value => 0,
# :min_y_value => 0,
# :show_data_labels => true,
# :show_x_guidelines => true,
# :show_x_title => true,
# :x_title => "Time",
# :stagger_x_labels => true,
# :stagger_y_labels => true,
# :x_label_format => "%m/%d/%y",
# })
#
# graph.add_data({
# :data => data1,
# :title => 'Data',
# })
#
# print graph.burn()
#
# = Description
#
# Produces a graph of temporal scalar data.
#
# = Examples
#
# http://www.germane-software/repositories/public/SVG/test/schedule.rb
#
# = Notes
#
# The default stylesheet handles upto 10 data sets, if you
# use more you must create your own stylesheet and add the
# additional settings for the extra data sets. You will know
# if you go over 10 data sets as they will have no style and
# be in black.
#
# Note that multiple data sets within the same chart can differ in
# length, and that the data in the datasets needn't be in order;
# they will be ordered by the plot along the X-axis.
#
# The dates must be parseable by ParseDate, but otherwise can be
# any order of magnitude (seconds within the hour, or years)
#
# = See also
#
# * SVG::Graph::Graph
# * SVG::Graph::BarHorizontal
# * SVG::Graph::Bar
# * SVG::Graph::Line
# * SVG::Graph::Pie
# * SVG::Graph::Plot
# * SVG::Graph::TimeSeries
#
# == Author
#
# Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
#
# Copyright 2004 Sean E. Russell
# This software is available under the Ruby license[LICENSE.txt]
#
class Schedule < Graph
# In addition to the defaults set by Graph::initialize and
# Plot::set_defaults, sets:
# [x_label_format] '%Y-%m-%d %H:%M:%S'
# [popup_format] '%Y-%m-%d %H:%M:%S'
def set_defaults
init_with(
:x_label_format => '%Y-%m-%d %H:%M:%S',
:popup_format => '%Y-%m-%d %H:%M:%S',
:scale_x_divisions => false,
:scale_x_integers => false,
:bar_gap => true
)
end
# The format string use do format the X axis labels.
# See Time::strformat
attr_accessor :x_label_format
# Use this to set the spacing between dates on the axis. The value
# must be of the form
# "\d+ ?(days|weeks|months|years|hours|minutes|seconds)?"
#
# EG:
#
# graph.timescale_divisions = "2 weeks"
#
# will cause the chart to try to divide the X axis up into segments of
# two week periods.
attr_accessor :timescale_divisions
# The formatting used for the popups. See x_label_format
attr_accessor :popup_format
attr_accessor :min_x_value
attr_accessor :scale_x_divisions
attr_accessor :scale_x_integers
attr_accessor :bar_gap
# Add data to the plot.
#
# # A data set with 1 point: Lunch from 12:30 to 14:00
# d1 = [ "Lunch", "12:30", "14:00" ]
# # A data set with 2 points: "Cats" runs from 5/11/03 to 7/15/04, and
# # "Henry V" runs from 6/12/03 to 8/20/03
# d2 = [ "Cats", "5/11/03", "7/15/04",
# "Henry V", "6/12/03", "8/20/03" ]
#
# graph.add_data(
# :data => d1,
# :title => 'Meetings'
# )
# graph.add_data(
# :data => d2,
# :title => 'Plays'
# )
#
# Note that the data must be in time,value pairs, and that the date format
# may be any date that is parseable by ParseDate.
# Also note that, in this example, we're mixing scales; the data from d1
# will probably not be discernable if both data sets are plotted on the same
# graph, since d1 is too granular.
def add_data data
@data = [] unless @data
raise "No data provided by #{conf.inspect}" unless data[:data] and
data[:data].kind_of? Array
raise "Data supplied must be title,from,to tripples! "+
"The data provided contained an odd set of "+
"data points" unless data[:data].length % 3 == 0
return if data[:data].length == 0
y = []
x_start = []
x_end = []
data[:data].each_index {|i|
im3 = i%3
if im3 == 0
y << data[:data][i]
else
arr = ParseDate.parsedate( data[:data][i] )
t = Time.local( *arr[0,6].compact )
(im3 == 1 ? x_start : x_end) << t.to_i
end
}
sort( x_start, x_end, y )
@data = [x_start, x_end, y ]
end
protected
def min_x_value=(value)
arr = ParseDate.parsedate( value )
@min_x_value = Time.local( *arr[0,6].compact ).to_i
end
def format x, y
Time.at( x ).strftime( popup_format )
end
def get_x_labels
rv = get_x_values.collect { |v| Time.at(v).strftime( x_label_format ) }
end
def y_label_offset( height )
height / -2.0
end
def get_y_labels
@data[2]
end
def draw_data
fieldheight = field_height
fieldwidth = field_width
bargap = bar_gap ? (fieldheight < 10 ? fieldheight / 2 : 10) : 0
subbar_height = fieldheight - bargap
field_count = 1
y_mod = (subbar_height / 2) + (font_size / 2)
min,max,div = x_range
scale = (@graph_width.to_f - font_size*2) / (max-min)
@data[0].each_index { |i|
x_start = @data[0][i]
x_end = @data[1][i]
y = @graph_height - (fieldheight * field_count)
bar_width = (x_end-x_start) * scale
bar_start = x_start * scale - (min * scale)
@graph.add_element( "rect", {
"x" => bar_start.to_s,
"y" => y.to_s,
"width" => bar_width.to_s,
"height" => subbar_height.to_s,
"class" => "fill#{field_count+1}"
})
field_count += 1
}
end
def get_css
return <<EOL
/* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */
.key1,.fill1{
fill: #ff0000;
fill-opacity: 0.5;
stroke: none;
stroke-width: 0.5px;
}
.key2,.fill2{
fill: #0000ff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key3,.fill3{
fill: #00ff00;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key4,.fill4{
fill: #ffcc00;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key5,.fill5{
fill: #00ccff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key6,.fill6{
fill: #ff00ff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key7,.fill7{
fill: #00ffff;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key8,.fill8{
fill: #ffff00;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key9,.fill9{
fill: #cc6666;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key10,.fill10{
fill: #663399;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key11,.fill11{
fill: #339900;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
.key12,.fill12{
fill: #9966FF;
fill-opacity: 0.5;
stroke: none;
stroke-width: 1px;
}
EOL
end
private
def x_range
max_value = [ @data[0][-1], @data[1].max ].max
min_value = [ @data[0][0], @data[1].min ].min
min_value = min_value<min_x_value ? min_value : min_x_value if min_x_value
range = max_value - min_value
right_pad = range == 0 ? 10 : range / 20.0
scale_range = (max_value + right_pad) - min_value
scale_division = scale_x_divisions || (scale_range / 10.0)
if scale_x_integers
scale_division = scale_division < 1 ? 1 : scale_division.round
end
[min_value, max_value, scale_division]
end
def get_x_values
rv = []
min, max, scale_division = x_range
if timescale_divisions
timescale_divisions =~ /(\d+) ?(days|weeks|months|years|hours|minutes|seconds)?/
division_units = $2 ? $2 : "days"
amount = $1.to_i
if amount
step = nil
case division_units
when "months"
cur = min
while cur < max
rv << cur
arr = Time.at( cur ).to_a
arr[4] += amount
if arr[4] > 12
arr[5] += (arr[4] / 12).to_i
arr[4] = (arr[4] % 12)
end
cur = Time.local(*arr).to_i
end
when "years"
cur = min
while cur < max
rv << cur
arr = Time.at( cur ).to_a
arr[5] += amount
cur = Time.local(*arr).to_i
end
when "weeks"
step = 7 * 24 * 60 * 60 * amount
when "days"
step = 24 * 60 * 60 * amount
when "hours"
step = 60 * 60 * amount
when "minutes"
step = 60 * amount
when "seconds"
step = amount
end
min.step( max, step ) {|v| rv << v} if step
return rv
end
end
min.step( max, scale_division ) {|v| rv << v}
return rv
end
end
end
end
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