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jaraco 17 years ago
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  1. 518
      Plot.py
  2. 181
      TimeSeries.py
  3. 728
      __init__.py
  4. 23
      build.py
  5. 44
      testing.py
  6. 45
      testing.rb

518
Plot.py
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#!/usr/bin/env python
import SVG
from itertools import izip, count, chain
def get_pairs( i ):
i = iter( i )
while True: yield i.next(), i.next()
def float_range( start = 0, stop = None, step = 1 ):
"Much like the built-in function range, but accepts floats"
while start < stop:
yield float( start )
start += step
class Plot( SVG.Graph ):
"""=== For creating SVG plots of scalar data
= Synopsis
require 'SVG/Graph/Plot'
# Data sets are x,y pairs
# Note that multiple data sets 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.
projection = [
6, 11, 0, 5, 18, 7, 1, 11, 13, 9, 1, 2, 19, 0, 3, 13,
7, 9
]
actual = [
0, 18, 8, 15, 9, 4, 18, 14, 10, 2, 11, 6, 14, 12,
15, 6, 4, 17, 2, 12
]
graph = SVG::Graph::Plot.new({
:height => 500,
:width => 300,
:key => true,
:scale_x_integers => true,
:scale_y_integerrs => true,
})
graph.add_data({
:data => projection
:title => 'Projected',
})
graph.add_data({
:data => actual,
:title => 'Actual',
})
print graph.burn()
= Description
Produces a graph of scalar data.
This object aims to allow you to easily create high quality
SVG[http://www.w3c.org/tr/svg] scalar plots. You can either use the
default style sheet or supply your own. Either way there are many options
which can be configured to give you control over how the graph is
generated - with or without a key, data elements at each point, title,
subtitle etc.
= Examples
http://www.germane-software/repositories/public/SVG/test/plot.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.
Unlike the other types of charts, data sets must contain x,y pairs:
[ 1, 2 ] # A data set with 1 point: (1,2)
[ 1,2, 5,6] # A data set with 2 points: (1,2) and (5,6)
= See also
* SVG::Graph::Graph
* SVG::Graph::BarHorizontal
* SVG::Graph::Bar
* SVG::Graph::Line
* SVG::Graph::Pie
* SVG::Graph::TimeSeries
== Author
Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
Copyright 2004 Sean E. Russell
This software is available under the Ruby license[LICENSE.txt]"""
top_align = right_align = top_font = right_font = 1
"""Determines the scaling for the Y axis divisions.
graph.scale_y_divisions = 0.5
would cause the graph to attempt to generate labels stepped by 0.5; EG:
0, 0.5, 1, 1.5, 2, ..."""
scale_y_divisions = None
"Make the X axis labels integers"
scale_x_integers = False
"Make the Y axis labels integers"
scale_y_integers = False
"Fill the area under the line"
area_fill = False
"""Show a small circle on the graph where the line
goes from one point to the next."""
show_data_points = True
"Indicate whether the lines should be drawn between points"
draw_lines_between_points = True
"Set the minimum value of the X axis"
min_x_value = None
"Set the minimum value of the Y axis"
min_y_value = None
"Set the maximum value of the X axis"
max_x_value = None
"Set the maximum value of the Y axis"
max_y_value = None
stacked = False
@apply
def scale_x_divisions():
doc = """Determines the scaling for the X axis divisions.
graph.scale_x_divisions = 2
would cause the graph to attempt to generate labels stepped by 2; EG:
0,2,4,6,8..."""
def fget( self ):
return getattr( self, '_scale_x_divisions', None )
def fset( self, val ):
self._scale_x_divisions = val
return property(**locals())
def validate_data( self, data ):
if len( data['data'] ) % 2 != 0:
raise "Expecting x,y pairs for data points for %s." % self.__class__.__name__
def process_data( self, data ):
pairs = list( get_pairs( data['data'] ) )
pairs.sort()
data['data'] = zip( *pairs )
def calculate_left_margin( self ):
super( Plot, self ).calculate_left_margin()
label_left = len( str( self.get_x_labels()[0] ) ) / 2 * self.font_size * 0.6
self.border_left = max( label_left, self.border_left )
def calculate_right_margin( self ):
super( Plot, self ).calculate_right_margin()
label_right = len( str( self.get_x_labels()[-1] ) ) / 2 * self.font_size * 0.6
self.border_right = max( label_right, self.border_right )
def data_max( self, axis ):
data_index = getattr( self, '%s_data_index' % axis )
max_value = max( chain( *map( lambda set: set['data'][data_index], self.data ) ) )
# above is same as
#max_value = max( map( lambda set: max( set['data'][data_index] ), self.data ) )
spec_max = getattr( self, 'max_%s_value' % axis )
max_value = max( max_value, spec_max )
return max_value
def data_min( self, axis ):
data_index = getattr( self, '%s_data_index' % axis )
min_value = min( chain( *map( lambda set: set['data'][data_index], self.data ) ) )
spec_min = getattr( self, 'min_%s_value' % axis )
if spec_min is not None:
min_value = min( min_value, spec_min )
return min_value
x_data_index = 0
y_data_index = 1
def data_range( self, axis ):
side = { 'x': 'right', 'y': 'top' }[axis]
min_value = self.data_min( axis )
max_value = self.data_max( axis )
range = max_value - min_value
side_pad = range / 20.0 or 10
scale_range = ( max_value + side_pad ) - min_value
scale_division = getattr( self, 'scale_%s_divisions' % axis ) or ( scale_range / 10.0 )
if getattr( self, 'scale_%s_integers' % axis ):
scale_division = scale_division.round() or 1
return min_value, max_value, scale_division
def x_range( self ): return self.data_range( 'x' )
def y_range( self ): return self.data_range( 'y' )
def get_data_values( self, axis ):
min_value, max_value, scale_division = self.data_range( axis )
return tuple( float_range( *self.data_range( axis ) ) )
def get_x_values( self ): return self.get_data_values( 'x' )
def get_y_values( self ): return self.get_data_values( 'y' )
def get_x_labels( self ):
return map( str, self.get_x_values() )
def get_y_labels( self ):
return map( str, self.get_y_values() )
def field_size( self, axis ):
size = { 'x': 'width', 'y': 'height' }[axis]
side = { 'x': 'right', 'y': 'top' }[axis]
values = getattr( self, 'get_%s_values' % axis )()
max_d = self.data_max( axis )
dx = float( max_d - values[-1] ) / ( values[-1] - values[-2] )
graph_size = getattr( self, 'graph_%s' % size )
side_font = getattr( self, '%s_font' % side )
side_align = getattr( self, '%s_align' % side )
result = ( float( graph_size ) - self.font_size*2*side_font ) / \
( len( values ) + dx - side_align )
return result
def field_width( self ): return self.field_size( 'x' )
def field_height( self ): return self.field_size( 'y' )
def draw_data( self ):
self.load_transform_parameters()
for line, data in izip( count(1), self.data ):
x_start, y_start = self.transform_output_coordinates(
( data['data'][self.x_data_index][0],
data['data'][self.y_data_index][0] )
)
data_points = zip( *data['data'] )
graph_points = self.get_graph_points( data_points )
lpath = self.get_lpath( graph_points )
if self.area_fill:
graph_height = self.graph_height
path = self._create_element( 'path', {
'd': 'M%(x_start)f %(graph_height)f %(lpath)s V%(graph_height)f Z' % vars(),
'class': 'fill%(line)d' % vars() } )
self.graph.appendChild( path )
if self.draw_lines_between_points:
path = self._create_element( 'path', {
'd': 'M%(x_start)f %(y_start)f %(lpath)s' % vars(),
'class': 'line%(line)d' % vars() } )
self.graph.appendChild( path )
self.draw_data_points( line, data_points, graph_points )
self._draw_constant_lines( )
del self.__transform_parameters
def add_constant_line( self, value, label = None, style = None ):
self.constant_lines = getattr( self, 'constant_lines', [] )
self.constant_lines.append( ( value, label, style ) )
def _draw_constant_lines( self ):
if hasattr( self, 'constant_lines' ):
map( self.__draw_constant_line, self.constant_lines )
def __draw_constant_line( self, ( value, label, style ) ):
"Draw a constant line on the y-axis with the label"
start = self.transform_output_coordinates( ( 0, value ) )[1]
stop = self.graph_width
path = self._create_element( 'path', {
'd': 'M 0 %(start)s h%(stop)s' % vars(),
'class': 'constantLine' } )
if style:
path['style'] = style
self.graph.appendChild( path )
text = self._create_element( 'text', {
'x': str( 2 ),
'y': str( start - 2 ),
'class': 'constantLine' } )
text.appendChild( self._doc.createTextNode( label ) )
self.graph.appendChild( text )
def load_transform_parameters( self ):
"Cache the parameters necessary to transform x & y coordinates"
x_min, x_max, x_div = self.x_range()
y_min, y_max, y_div = self.y_range()
x_step = ( float( self.graph_width ) - self.font_size*2 ) / \
( x_max - x_min )
y_step = ( float( self.graph_height ) - self.font_size*2 ) / \
( y_max - y_min )
self.__transform_parameters = dict( vars() )
del self.__transform_parameters['self']
def get_graph_points( self, data_points ):
return map( self.transform_output_coordinates, data_points )
def get_lpath( self, points ):
points = map( lambda p: "%f %f" % p, points )
return 'L' + ' '.join( points )
def transform_output_coordinates( self, (x,y) ):
x_min = self.__transform_parameters['x_min']
x_step = self.__transform_parameters['x_step']
y_min = self.__transform_parameters['y_min']
y_step = self.__transform_parameters['y_step']
#locals().update( self.__transform_parameters )
#vars().update( self.__transform_parameters )
x = ( x - x_min ) * x_step
y = self.graph_height - ( y - y_min ) * y_step
return x,y
def draw_data_points( self, line, data_points, graph_points ):
if not self.show_data_points \
and not self.show_data_values: return
for ((dx,dy),(gx,gy)) in izip( data_points, graph_points ):
if self.show_data_points:
circle = self._create_element( 'circle', {
'cx': str( gx ),
'cy': str( gy ),
'r': '2.5',
'class': 'dataPoint%(line)s' % vars() } )
self.graph.appendChild( circle )
if self.show_data_values:
self.add_popup( gx, gy, self.format( dx, dy ) )
self.make_datapoint_text( gx, gy-6, dy )
def format( self, x, y ):
return '(%0.2f, %0.2f)' % (x,y)
def get_css( self ):
return """/* default line styles */
.line1{
fill: none;
stroke: #ff0000;
stroke-width: 1px;
}
.line2{
fill: none;
stroke: #0000ff;
stroke-width: 1px;
}
.line3{
fill: none;
stroke: #00ff00;
stroke-width: 1px;
}
.line4{
fill: none;
stroke: #ffcc00;
stroke-width: 1px;
}
.line5{
fill: none;
stroke: #00ccff;
stroke-width: 1px;
}
.line6{
fill: none;
stroke: #ff00ff;
stroke-width: 1px;
}
.line7{
fill: none;
stroke: #00ffff;
stroke-width: 1px;
}
.line8{
fill: none;
stroke: #ffff00;
stroke-width: 1px;
}
.line9{
fill: none;
stroke: #ccc6666;
stroke-width: 1px;
}
.line10{
fill: none;
stroke: #663399;
stroke-width: 1px;
}
.line11{
fill: none;
stroke: #339900;
stroke-width: 1px;
}
.line12{
fill: none;
stroke: #9966FF;
stroke-width: 1px;
}
/* default fill styles */
.fill1{
fill: #cc0000;
fill-opacity: 0.2;
stroke: none;
}
.fill2{
fill: #0000cc;
fill-opacity: 0.2;
stroke: none;
}
.fill3{
fill: #00cc00;
fill-opacity: 0.2;
stroke: none;
}
.fill4{
fill: #ffcc00;
fill-opacity: 0.2;
stroke: none;
}
.fill5{
fill: #00ccff;
fill-opacity: 0.2;
stroke: none;
}
.fill6{
fill: #ff00ff;
fill-opacity: 0.2;
stroke: none;
}
.fill7{
fill: #00ffff;
fill-opacity: 0.2;
stroke: none;
}
.fill8{
fill: #ffff00;
fill-opacity: 0.2;
stroke: none;
}
.fill9{
fill: #cc6666;
fill-opacity: 0.2;
stroke: none;
}
.fill10{
fill: #663399;
fill-opacity: 0.2;
stroke: none;
}
.fill11{
fill: #339900;
fill-opacity: 0.2;
stroke: none;
}
.fill12{
fill: #9966FF;
fill-opacity: 0.2;
stroke: none;
}
/* default line styles */
.key1,.dataPoint1{
fill: #ff0000;
stroke: none;
stroke-width: 1px;
}
.key2,.dataPoint2{
fill: #0000ff;
stroke: none;
stroke-width: 1px;
}
.key3,.dataPoint3{
fill: #00ff00;
stroke: none;
stroke-width: 1px;
}
.key4,.dataPoint4{
fill: #ffcc00;
stroke: none;
stroke-width: 1px;
}
.key5,.dataPoint5{
fill: #00ccff;
stroke: none;
stroke-width: 1px;
}
.key6,.dataPoint6{
fill: #ff00ff;
stroke: none;
stroke-width: 1px;
}
.key7,.dataPoint7{
fill: #00ffff;
stroke: none;
stroke-width: 1px;
}
.key8,.dataPoint8{
fill: #ffff00;
stroke: none;
stroke-width: 1px;
}
.key9,.dataPoint9{
fill: #cc6666;
stroke: none;
stroke-width: 1px;
}
.key10,.dataPoint10{
fill: #663399;
stroke: none;
stroke-width: 1px;
}
.key11,.dataPoint11{
fill: #339900;
stroke: none;
stroke-width: 1px;
}
.key12,.dataPoint12{
fill: #9966FF;
stroke: none;
stroke-width: 1px;
}
.constantLine{
color: navy;
stroke: navy;
stroke-width: 1px;
stroke-dasharray: 9 1 1;
}
"""

181
TimeSeries.py
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#!/usr/bin/env python
import SVG
import re
#requires python date-util from http://labix.org/python-dateutil
from dateutil.parser import parse
from dateutil.relativedelta import relativedelta
from time import mktime
import datetime
fromtimestamp = datetime.datetime.fromtimestamp
class Plot( SVG.Plot.Plot ):
"""=== For creating SVG plots of scalar temporal data
= Synopsis
import SVG.TimeSeries
# Data sets are x,y pairs
data1 = ["6/17/72", 11, "1/11/72", 7, "4/13/04 17:31", 11,
"9/11/01", 9, "9/1/85", 2, "9/1/88", 1, "1/15/95", 13]
data2 = ["8/1/73", 18, "3/1/77", 15, "10/1/98", 4,
"5/1/02", 14, "3/1/95", 6, "8/1/91", 12, "12/1/87", 6,
"5/1/84", 17, "10/1/80", 12]
graph = SVG::Graph::TimeSeries.new( {
:width => 640,
:height => 480,
:graph_title => title,
:show_graph_title => true,
:no_css => true,
:key => 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",
:show_y_title => true,
:y_title => "Ice Cream Cones",
:y_title_text_direction => :bt,
:stagger_x_labels => true,
:x_label_format => "%m/%d/%y",
})
graph.add_data({
:data => projection
:title => 'Projected',
})
graph.add_data({
:data => actual,
:title => 'Actual',
})
print graph.burn()
= Description
Produces a graph of temporal scalar data.
= Examples
http://www.germane-software/repositories/public/SVG/test/timeseries.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.
Unlike the other types of charts, data sets must contain x,y pairs:
[ "12:30", 2 ] # A data set with 1 point: ("12:30",2)
[ "01:00",2, "14:20",6] # A data set with 2 points: ("01:00",2) and
# ("14:20",6)
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
== Author
Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
Copyright 2004 Sean E. Russell
This software is available under the Ruby license[LICENSE.txt]
"""
popup_format = x_label_format = '%Y-%m-%d %H:%M:%S'
__doc_popup_format_ = "The formatting usped for the popups. See x_label_format"
__doc_x_label_format_ = "The format string used to format the X axis labels. See strftime."
timescale_divisions = None
__doc_timescale_divisions_ = """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."""
def add_data( self, data ):
"""Add data to the plot.
d1 = [ "12:30", 2 ] # A data set with 1 point: ("12:30",2)
d2 = [ "01:00",2, "14:20",6] # A data set with 2 points: ("01:00",2) and
# ("14:20",6)
graph.add_data(
:data => d1,
:title => 'One'
)
graph.add_data(
:data => d2,
:title => 'Two'
)
Note that the data must be in time,value pairs, and that the date format
may be any date that is parseable by ParseDate."""
super( Plot, self ).add_data( data )
def process_data( self, data ):
super( Plot, self ).process_data( data )
# the date should be in the first element, so parse it out
data['data'][0] = map( self.parse_date, data['data'][0] )
_min_x_value = SVG.Plot.Plot.min_x_value
def get_min_x_value( self ):
return self._min_x_value
def set_min_x_value( self, date ):
self._min_x_value = self.parse_date( date )
min_x_value = property( get_min_x_value, set_min_x_value )
def format( self, x, y ):
return fromtimestamp( x ).strftime( self.popup_format )
def get_x_labels( self ):
return map( lambda t: fromtimestamp( t ).strftime( self.x_label_format ), self.get_x_values() )
def get_x_values( self ):
result = self.get_x_timescale_division_values()
if result: return result
return tuple( SVG.Plot.float_range( *self.x_range() ) )
def get_x_timescale_division_values( self ):
if not self.timescale_divisions: return
min, max, scale_division = self.x_range()
m = re.match( '(?P<amount>\d+) ?(?P<division_units>days|weeks|months|years|hours|minutes|seconds)?', self.timescale_divisions )
# copy amount and division_units into the local namespace
division_units = m.groupdict()['division_units'] or 'days'
amount = int( m.groupdict()['amount'] )
if not amount: return
delta = relativedelta( **{ division_units: amount } )
result = tuple( self.get_time_range( min, max, delta ) )
return result
def get_time_range( self, start, stop, delta ):
start, stop = map( fromtimestamp, (start, stop ) )
current = start
while current <= stop:
yield mktime( current.timetuple() )
current += delta
def parse_date( self, date_string ):
return mktime( parse( date_string ).timetuple() )

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__init__.py
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# -*- coding: UTF-8 -*-
__all__ = ( 'Plot', 'TimeSeries' )
from xml.dom import minidom as dom
from operator import itemgetter
from itertools import islice
try:
import zlib
__have_zlib = True
except ImportError:
__have_zlib = False
def sort_multiple( arrays ):
"sort multiple lists (of equal size) using the first list for the sort keys"
tuples = zip( *arrays )
tuples.sort()
return zip( *tuples )
class Graph( object ):
"""=== Base object for generating SVG Graphs
== Synopsis
This class is only used as a superclass of specialized charts. Do not
attempt to use this class directly, unless creating a new chart type.
For examples of how to subclass this class, see the existing specific
subclasses, such as SVG.Pie.
== Examples
For examples of how to use this package, see either the test files, or
the documentation for the specific class you want to use.
* file:test/plot.rb
* file:test/single.rb
* file:test/test.rb
* file:test/timeseries.rb
== Description
This package should be used as a base for creating SVG graphs.
== Acknowledgements
Sean E. Russel for creating the SVG::Graph Ruby package from which this
Python port is derived.
Leo Lapworth for creating the SVG::TT::Graph package which the Ruby
port is based on.
Stephen Morgan for creating the TT template and SVG.
== See
* SVG.BarHorizontal
* SVG.Bar
* SVG.Line
* SVG.Pie
* SVG.Plot
* SVG.TimeSeries
== Author
Jason R. Coombs <jaraco@jaraco.com>
Copyright 2005 Sandia National Laboratories
"""
width= 500
height= 300
show_x_guidelines= False
show_y_guidelines= True
show_data_values= True
min_scale_value= 0
show_x_labels= True
stagger_x_labels= False
rotate_x_labels= False
step_x_labels= 1
step_include_first_x_label= True
show_y_labels= True
rotate_y_labels= False
stagger_y_labels= False
step_include_first_y_label= True
step_y_labels= 1
scale_integers= False
show_x_title= False
x_title= 'X Field names'
show_y_title= False
y_title_text_direction= 'bt' # 'bt' for bottom to top; 'tb' for top to bottom
y_title= 'Y Scale'
show_graph_title= False
graph_title= 'Graph Title'
show_graph_subtitle= False
graph_subtitle= 'Graph Subtitle'
key= True
key_position= 'right' # 'bottom' or 'right',
font_size= 12
title_font_size= 16
subtitle_font_size= 14
x_label_font_size= 12
x_title_font_size= 14
y_label_font_size= 12
y_title_font_size= 14
key_font_size= 10
no_css= False
add_popups= False
top_align = top_font = right_align = right_font = 0
def __init__( self, config = {} ):
"""Initialize the graph object with the graph settings. You won't
instantiate this class directly; see the subclass for options."""
self.load_config( config )
self.clear_data()
def load_config( self, config ):
self.__dict__.update( config )
def add_data( self, conf ):
"""This method allows you do add data to the graph object.
It can be called several times to add more data sets in.
>>> data_sales_02 = [12, 45, 21]
>>> graph.add_data({
... 'data': data_sales_02,
... 'title': 'Sales 2002'
... })
"""
self.validate_data( conf )
self.process_data( conf )
self.data.append( conf )
def validate_data( self, data ):
try:
assert( isinstance( conf['data'], ( tuple, list ) ) )
except TypeError, e:
raise TypeError, "conf should be dictionary with 'data' and other items"
except AssertionError:
if not hasattr( conf['data'], '__iter__' ):
raise TypeError, "conf['data'] should be tuple or list or iterable"
def process_data( data ): pass
def clear_data( self ):
"""This method removes all data from the object so that you can
reuse it to create a new graph but with the same config options.
>>> graph.clear_data()"""
self.data = []
def burn( self ):
"""This method processes the template with the data and
config which has been set and returns the resulting SVG.
This method will croak unless at least one data set has
been added to the graph object.
Ex: graph.burn()"""
if not self.data: raise ValueError( "No data available" )
if hasattr( self, 'calculations' ): self.calculations()
self.start_svg()
self.calculate_graph_dimensions()
self.foreground = self._create_element( "g" )
self.draw_graph()
self.draw_titles()
self.draw_legend()
self.draw_data()
self.graph.appendChild( self.foreground )
self.style()
data = self._doc.toprettyxml()
if hasattr( self, 'compress' ) and self.compress:
if __have_zlib:
data = zlib.compress( data )
else:
data += '<!-- Python zlib not available for SVGZ -->'
return data
KEY_BOX_SIZE = 12
def calculate_left_margin( self ):
"""Override this (and call super) to change the margin to the left
of the plot area. Results in border_left being set."""
bl = 7
# Check for Y labels
if self.rotate_y_labels:
max_y_label_height_px = self.y_label_font_size
else:
label_lengths = map( len, self.get_y_labels() )
max_y_label_len = max( label_lengths )
max_y_label_height_px = 0.6 * max_y_label_len * self.y_label_font_size
if self.show_y_labels: bl += max_y_label_height_px
if self.stagger_y_labels: bl += max_y_label_height_px + 10
if self.show_y_title: bl += self.y_title_font_size + 5
self.border_left = bl
def max_y_label_width_px( self ):
"""Calculates the width of the widest Y label. This will be the
character height if the Y labels are rotated."""
if self.rotate_y_labels:
return self.font_size
def calculate_right_margin( self ):
"""Override this (and call super) to change the margin to the right
of the plot area. Results in border_right being set."""
br = 7
if self.key and self.key_position == 'right':
max_key_len = max( map( len, self.keys() ) )
br += max_key_len * self.key_font_size * 0.6
br += self.KEY_BOX_SIZE
br += 10 # Some padding around the box
self.border_right = br
def calculate_top_margin( self ):
"""Override this (and call super) to change the margin to the top
of the plot area. Results in border_top being set."""
self.border_top = 5
if self.show_graph_title: self.border_top += self.title_font_size
self.border_top += 5
if self.show_graph_subtitle: self.border_top += self.subtitle_font_size
def add_popup( self, x, y, label ):
"Adds pop-up point information to a graph."
txt_width = len( label ) * self.font_size * 0.6 + 10
tx = x + [5,-5][int(x+txt_width > self.width)]
t = self._create_element( 'text' )
anchor = ['start', 'end'][x+txt_width > self.width]
style = 'fill: #000; text-anchor: %s;' % anchor
id = 'label-%s' % label
attributes = { 'x': str( tx ),
'y': str( y - self.font_size ),
'visibility': 'hidden',
'style': style,
'text': label,
'id': id
}
map( lambda a: t.setAttribute( *a ), attributes.items() )
self.foreground.appendChild( t )
visibility = "document.getElementById(%s).setAttribute('visibility', %%s )" % id
t = self._create_element( 'circle' )
attributes = { 'cx': str( x ),
'cy': str( y ),
'r': 10,
'style': 'opacity: 0;',
'onmouseover': visibility % 'visible',
'onmouseout': visibility % 'hidden',
}
map( lambda a: t.setAttribute( *a ), attributes.items() )
def calculate_bottom_margin( self ):
"""Override this (and call super) to change the margin to the bottom
of the plot area. Results in border_bottom being set."""
bb = 7
if self.key and self.key_position == 'bottom':
bb += len( self.data ) * ( self.font_size + 5 )
bb += 10
if self.show_x_labels:
max_x_label_height_px = self.x_label_font_size
if self.rotate_x_labels:
label_lengths = map( len, self.get_x_labels() )
max_x_label_len = reduce( max, label_lengths )
max_x_label_height_px *= 0.6 * max_x_label_len
bb += max_x_label_height_px
if self.stagger_x_labels: bb += max_x_label_height_px + 10
if self.show_x_title: bb += self.x_title_font_size + 5
self.border_bottom = bb
def draw_graph( self ):
transform = 'translate ( %s %s )' % ( self.border_left, self.border_top )
self.graph = self._create_element( 'g', { 'transform': transform } )
self.root.appendChild( self.graph )
self.graph.appendChild( self._create_element( 'rect', {
'x': '0',
'y': '0',
'width': str( self.graph_width ),
'height': str( self.graph_height ),
'class': 'graphBackground'
} ) )
#Axis
self.graph.appendChild( self._create_element( 'path', {
'd': 'M 0 0 v%s' % self.graph_height,
'class': 'axis',
'id': 'xAxis'
} ) )
self.graph.appendChild( self._create_element( 'path', {
'd': 'M 0 %s h%s' % ( self.graph_height, self.graph_width ),
'class': 'axis',
'id': 'yAxis'
} ) )
self.draw_x_labels()
self.draw_y_labels()
def x_label_offset( self, width ):
"""Where in the X area the label is drawn
Centered in the field, should be width/2. Start, 0."""
return 0
def make_datapoint_text( self, x, y, value, style='' ):
if self.show_data_values:
e = self._create_element( 'text', {
'x': str( x ),
'y': str( y ),
'class': 'dataPointLabel',
'style': '%(style)s stroke: #fff; stroke-width: 2;' % vars(),
} )
e.appendChild( self._doc.createTextNode( str( value ) ) )
self.foreground.appendChild( e )
e = self._create_element( 'text', {
'x': str( x ),
'y': str( y ),
'class': 'dataPointLabel' } )
e.appendChild( self._doc.createTextNode( str( value ) ) )
if style: e.setAttribute( 'style', style )
self.foreground.appendChild( e )
def draw_x_labels( self ):
"Draw the X axis labels"
if self.show_x_labels:
labels = self.get_x_labels()
count = len( labels )
labels = enumerate( iter( labels ) )
start = int( not self.step_include_first_x_label )
labels = islice( labels, start, None, self.step_x_labels )
map( self.draw_x_label, labels )
self.draw_x_guidelines( self.field_width(), count )
def draw_x_label( self, label ):
label_width = self.field_width()
index, label = label
text = self._create_element( 'text', { 'class': 'xAxisLabels' } )
text.appendChild( self._doc.createTextNode( label ) )
self.graph.appendChild( text )
x = index * label_width + self.x_label_offset( label_width )
y = self.graph_height + self.x_label_font_size + 3
t = 0 - ( self.font_size / 2 )
if self.stagger_x_labels and (index % 2 ):
stagger = self.x_label_font_size + 5
y += stagger
graph_height = self.graph_height
path = self._create_element( 'path', {
'd': 'M%(x)f %(graph_height)f v%(stagger)d' % vars(),
'class': 'staggerGuideLine'
} )
self.graph.appendChild( path )
text.setAttribute( 'x', str( x ) )
text.setAttribute( 'y', str( y ) )
if self.rotate_x_labels:
transform = 'rotate( 90 %d %d ) translate( 0 -%d )' % \
( x, y-self.x_label_font_size, x_label_font_size/4 )
text.setAttribute( 'transform', transform )
text.setAttribute( 'style', 'text-anchor: start' )
else:
text.setAttribute( 'style', 'text-anchor: middle' )
def y_label_offset( self, height ):
"""Where in the Y area the label is drawn
Centered in the field, should be width/2. Start, 0."""
return 0
def get_field_width( self ):
return float( self.graph_width - self.font_size*2*self.right_font ) / \
( len( self.get_x_labels() ) - self.right_align )
field_width = property( get_field_width )
def get_field_height( self ):
return float( self.graph_height - self.font_size*2*self.top_font ) / \
( len( self.get_y_labels() ) - self.top_align )
field_height = property( get_field_height )
def draw_y_labels( self ):
"Draw the Y axis labels"
if self.show_y_labels:
labels = self.get_y_labels()
count = len( labels )
labels = enumerate( iter( labels ) )
start = int( not self.step_include_first_y_label )
labels = islice( labels, start, None, self.step_y_labels )
map( self.draw_y_label, labels )
self.draw_y_guidelines( self.field_height(), count )
def get_y_offset( self ):
#result = self.graph_height + self.y_label_offset( label_height )
result = self.graph_height + self.y_label_offset( self.field_height() )
if not self.rotate_y_labels: result += self.font_size/1.2
return result
y_offset = property( get_y_offset )
def draw_y_label( self, label ):
label_height = self.field_height()
index, label = label
text = self._create_element( 'text', { 'class': 'yAxisLabels' } )
text.appendChild( self._doc.createTextNode( label ) )
self.graph.appendChild( text )
y = self.y_offset - ( label_height * index )
x = {True: 0, False:-3}[self.rotate_y_labels]
if self.stagger_y_labels and (index % 2 ):
stagger = self.y_label_font_size + 5
x -= stagger
path = self._create_element( 'path', {
'd': 'M%(x)f %(y)f h%(stagger)d' % vars(),
'class': 'staggerGuideLine'
} )
self.graph.appendChild( path )
text.setAttribute( 'x', str( x ) )
text.setAttribute( 'y', str( y ) )
if self.rotate_y_labels:
transform = 'translate( -%d 0 ) rotate ( 90 %d %d )' % \
( self.font_size, x, y )
text.setAttribute( 'transform', transform )
text.setAttribute( 'style', 'text-anchor: middle' )
else:
text.setAttribute( 'y', str( y - self.y_label_font_size/2 ) )
text.setAttribute( 'style', 'text-anchor: end' )
def draw_x_guidelines( self, label_height, count ):
"Draw the X-axis guidelines"
if not self.show_x_guidelines: return
# skip the first one
for count in range(1,count):
start = label_height*count
stop = self.graph_height
path = self._create_element( 'path', {
'd': 'M %(start)s 0 v%(stop)s' % vars(),
'class': 'guideLines' } )
self.graph.appendChild( path )
def draw_y_guidelines( self, label_height, count ):
"Draw the Y-axis guidelines"
if not self.show_y_guidelines: return
for count in range( 1, count ):
start = self.graph_height - label_height*count
stop = self.graph_width
path = self._create_element( 'path', {
'd': 'M 0 %(start)s h%(stop)s' % vars(),
'class': 'guideLines' } )
self.graph.appendChild( path )
def draw_titles( self ):
"Draws the graph title and subtitle"
if self.show_graph_title: self.draw_graph_title()
if self.show_graph_subtitle: self.draw_graph_subtitle()
if self.show_x_title: self.draw_x_title()
if self.show_y_title: self.draw_y_title()
def draw_graph_title( self ):
text = self._create_element( 'text', {
'x': str( self.width / 2 ),
'y': str( self.title_font_size ),
'class': 'mainTitle' } )
text.appendChild( self._doc.createTextNode( self.graph_title ) )
self.root.appendChild( text )
def draw_graph_subtitle( self ):
raise NotImplementedError
def draw_x_title( self ):
raise NotImplementedError
def draw_y_title( self ):
x = self.y_title_font_size
if self.y_title_text_direction=='bt':
x += 3
rotate = -90
else:
x -= 3
rotate = 90
y = self.height / 2
text = self._create_element( 'text', {
'x': str( x ),
'y': str( y ),
'class': 'yAxisTitle',
} )
text.appendChild( self._doc.createTextNode( self.y_title ) )
text.setAttribute( 'transform', 'rotate( %(rotate)d, %(x)s, %(y)s )' % vars() )
self.root.appendChild( text )
def keys( self ):
return map( itemgetter( 'title' ), self.data )
def draw_legend( self ):
if self.key:
group = self._create_element( 'g' )
self.root.appendChild( group )
for key_count, key_name in enumerate( self.keys() ):
y_offset = ( self.KEY_BOX_SIZE * key_count ) + (key_count * 5 )
rect = self._create_element( 'rect', {
'x': '0',
'y': str( y_offset ),
'width': str( self.KEY_BOX_SIZE ),
'height': str( self.KEY_BOX_SIZE ),
'class': 'key%s' % (key_count + 1),
} )
group.appendChild( rect )
text = self._create_element( 'text', {
'x': str( self.KEY_BOX_SIZE + 5 ),
'y': str( y_offset + self.KEY_BOX_SIZE ),
'class': 'keyText' } )
text.appendChild( self._doc.createTextNode( key_name ) )
group.appendChild( text )
if self.key_position == 'right':
x_offset = self.graph_width + self.border_left + 10
y_offset = self.border_top + 20
if self.key_position == 'bottom':
raise NotImplementedError
group.setAttribute( 'transform', 'translate(%(x_offset)d %(y_offset)d)' % vars() )
def style( self ):
"hard code the styles into the xml if style sheets are not used."
if self.no_css:
styles = self.parse_css()
for node in xpath.Evaluate( '//*[@class]', self.root ):
cl = node.getAttribute( 'class' )
style = styles[ cl ]
if node.hasAttribute( 'style' ):
style += node.getAtrtibute( 'style' )
node.setAttribute( 'style', style )
def parse_css( self ):
"""Take a .css file (classes only please) and parse it into a dictionary
of class/style pairs."""
css = self.get_style()
result = {}
for match in re.finditer( '^(?<names>\.(\w+)(?:\s*,\s*\.\w+)*)\s*\{(?<content>[^}]+)\}' ):
names = match.group_dict()['names']
# apperantly, we're only interested in class names
names = filter( None, re.split( '\s*,?\s*\.' ) )
content = match.group_dict()['content']
# convert all whitespace to
content = re.sub( '\s+', ' ', content )
for name in names:
result[name] = ';'.join( result[name], content )
return result
def add_defs( self, defs ):
"Override and place code to add defs here"
pass
def start_svg( self ):
"Base SVG Document Creation"
impl = dom.getDOMImplementation()
#dt = impl.createDocumentType( 'svg', 'PUBLIC'
self._doc = impl.createDocument( None, 'svg', None )
self.root = self._doc.documentElement
if hasattr( self, 'style_sheet' ):
pi = self._doc.createProcessingInstruction( 'xml-stylesheet',
'href="%s" type="text/css"' % self.style_sheet )
attributes = {
'width': str( self.width ),
'height': str( self.height ),
'viewBox': '0 0 %s %s' % ( self.width, self.height ),
'xmlns': 'http://www.w3.org/2000/svg',
'xmlns:xlink': 'http://www.w3.org/1999/xlink',
'xmlns:a3': 'http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/',
'a3:scriptImplementation': 'Adobe' }
map( lambda a: self.root.setAttribute( *a ), attributes.items() )
self.root.appendChild( self._doc.createComment( ' Created with SVG.Graph ' ) )
self.root.appendChild( self._doc.createComment( ' SVG.Graph by Jason R. Coombs ' ) )
self.root.appendChild( self._doc.createComment( ' Based on SVG::Graph by Sean E. Russel ' ) )
self.root.appendChild( self._doc.createComment( ' Based on Perl SVG:TT:Graph by Leo Lapworth & Stephan Morgan ' ) )
self.root.appendChild( self._doc.createComment( ' '+'/'*66 ) )
defs = self._create_element( 'defs' )
self.add_defs( defs )
self.root.appendChild( defs )
if not hasattr( self, 'style_sheet' ) and not self.no_css:
self.root.appendChild( self._doc.createComment( ' include default stylesheet if none specified ' ) )
style = self._create_element( 'style', { 'type': 'text/css' } )
defs.appendChild( style )
style_data = self._doc.createCDATASection( self.get_style() )
style.appendChild( style_data )
self.root.appendChild( self._doc.createComment( 'SVG Background' ) )
rect = self._create_element( 'rect', {
'width': str( self.width ),
'height': str( self.height ),
'x': '0',
'y': '0',
'class': 'svgBackground' } )
self.root.appendChild( rect )
def calculate_graph_dimensions( self ):
self.calculate_left_margin()
self.calculate_right_margin()
self.calculate_bottom_margin()
self.calculate_top_margin()
self.graph_width = self.width - self.border_left - self.border_right
self.graph_height = self.height - self.border_top - self.border_bottom
def get_style( self ):
result = """/* Copy from here for external style sheet */
.svgBackground{
fill:#ffffff;
}
.graphBackground{
fill:#f0f0f0;
}
/* graphs titles */
.mainTitle{
text-anchor: middle;
fill: #000000;
font-size: %(title_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.subTitle{
text-anchor: middle;
fill: #999999;
font-size: %(subtitle_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.axis{
stroke: #000000;
stroke-width: 1px;
}
.guideLines{
stroke: #666666;
stroke-width: 1px;
stroke-dasharray: 5 5;
}
.xAxisLabels{
text-anchor: middle;
fill: #000000;
font-size: %(x_label_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.yAxisLabels{
text-anchor: end;
fill: #000000;
font-size: %(y_label_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.xAxisTitle{
text-anchor: middle;
fill: #ff0000;
font-size: %(x_title_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.yAxisTitle{
fill: #ff0000;
text-anchor: middle;
font-size: %(y_title_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.dataPointLabel{
fill: #000000;
text-anchor:middle;
font-size: 10px;
font-family: "Arial", sans-serif;
font-weight: normal;
}
.staggerGuideLine{
fill: none;
stroke: #000000;
stroke-width: 0.5px;
}
%%s
.keyText{
fill: #000000;
text-anchor:start;
font-size: %(key_font_size)dpx;
font-family: "Arial", sans-serif;
font-weight: normal;
}
/* End copy for external style sheet */
""" % class_dict( self )
result = result % self.get_css()
return result
def _create_element( self, nodeName, attributes={} ):
"Create an XML node and set the attributes from a dict"
node = self._doc.createElement( nodeName )
map( lambda a: node.setAttribute( *a ), attributes.items() )
return node
class class_dict( object ):
"Emulates a dictionary, but retrieves class attributes"
def __init__( self, obj ):
self.__obj__ = obj
def __getitem__( self, item ):
return getattr( self.__obj__, item )
def keys( self ):
# dir returns a good guess of what attributes might be available
return dir( self.__obj__ )
import Plot, TimeSeries

23
build.py
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@ -1,23 +0,0 @@
# -*- coding: UTF-8 -*-
""" Setup script for building SVG distribution
Copyright © 2005 Jason R. Coombs
"""
from distutils.core import setup
__author__ = 'Jason R. Coombs <jaraco@sandia.gov>'
__version__ = '$Rev: $'[6:-2]
__svnauthor__ = '$Author: $'[9:-2]
__date__ = '$Date: $'[7:-2]
setup ( name = 'SVGChart',
version = '1.0.1',
description = 'Python SVG Charting Support',
author = 'Jason R. Coombs',
author_email = 'jaraco@sandia.gov',
packages = ['SVG'],
package_dir = { 'SVG':'.' },
script_args = ( 'bdist_wininst', )
)

44
testing.py
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@ -1,44 +0,0 @@
import sys, os
#sys.path.insert( 0, 'c:\documents and settings\jaraco\my documents\projects\jaraco' )
import SVG
from SVG import Plot
reload( SVG )
reload( Plot )
g = Plot.Plot( {
'min_x_value': 0,
'min_y_value': 0,
'area_fill': True,
'stagger_x_labels': True,
'stagger_y_labels': True,
'show_x_guidelines': True
})
g.add_data( { 'data': [ 1, 25, 2, 30, 3, 45 ], 'title': 'foo' } )
g.add_data( { 'data': [ 1,30, 2, 31, 3, 40 ], 'title': 'foo2' } )
g.add_data( { 'data': [ .5,35, 1, 20, 3, 10.5 ], 'title': 'foo2' } )
res = g.burn()
f = open( r'c:\sample.svg', 'w' )
f.write( res )
f.close()
from SVG import TimeSeries
reload( TimeSeries )
g = TimeSeries.Plot( { } )
g.timescale_divisions = '4 hours'
g.stagger_x_labels = True
g.x_label_format = '%d-%b'
#g.max_y_value = 200
g.add_data( { 'data': [ '2005-12-21T00:00:00', 20, '2005-12-22T00:00:00', 21 ], 'title': 'foo' } )
res = g.burn()
print g.field_width
print g.font_size
print g.right_font
print g.right_align
print g.get_x_labels()
f = open( r'c:\timeseries.py.svg', 'w' )
f.write( res )
f.close()

45
testing.rb
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@ -1,45 +0,0 @@
require 'SVG/Graph/Graph'
require 'SVG/Graph/Plot'
graph = SVG::Graph::Plot.new( {
:min_x_value=>0,
:min_y_value=>0,
:area_fill=> true,
:stagger_x_labels=>true,
:stagger_y_labels=>true
})
#data1 = [ 1,25, 2,30, 3,45 ]
graph.add_data( { :data=>[ 1,25, 2,30, 3,45 ], :title=>'foo' } )
graph.add_data( { :data=>[ 1,30, 2, 31, 3, 40 ], :title=>'foo2' } )
res = graph.burn()
f = File.new( 'c:\ruby.svg', 'w' )
f.write( res )
f.close()
require 'SVG/Graph/TimeSeries'
g = SVG::Graph::TimeSeries.new( {
:timescale_divisions => '4 hours',
:stagger_x_labels => true,
:x_label_format => '%d-%b',
} )
g.add_data( { :data=> [ '2005-12-21T00:00:00', 20, '2005-12-22T00:00:00', 21 ], :title=> 'foo' } )
res = g.burn()
print g.field_width
print "\n"
print g.inspect
print g.get_x_labels.length
print "\n"
print g.right_align
print "\n"
print g.get_x_labels
print "\n"
f = File.new( 'c:\timeseries.rb.svg', 'w' )
f.write( res )
f.close()
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