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#!/usr/bin/python
# -*- coding: utf-8 -*-
"""
Python-nvd3 is a Python wrapper for NVD3 graph library.
NVD3 is an attempt to build re-usable charts and chart components
for d3.js without taking away the power that d3.js gives you.
Project location : https://github.com/areski/python-nvd3
"""
from .NVD3Chart import NVD3Chart, TemplateMixin
class multiBarChart(TemplateMixin, NVD3Chart):
"""
A multiple bar graph contains comparisons of two or more categories or bars.
One axis represents a quantity and the other axis identifies a specific feature
about the categories. Reading a multiple bar graph includes looking at extremes
(tallest/longest vs. shortest) in each grouping.
Python example::
from nvd3 import multiBarChart
chart = multiBarChart(width=500, height=400, x_axis_format=None)
xdata = ['one', 'two', 'three', 'four']
ydata1 = [6, 12, 9, 16]
ydata2 = [8, 14, 7, 11]
chart.add_serie(name="Serie 1", y=ydata1, x=xdata)
chart.add_serie(name="Serie 2", y=ydata2, x=xdata)
chart.buildhtml()
Javascript generated:
.. raw:: html
<div id="multiBarChart"><svg style="height:450px; width:100%"></svg></div>
<script>
data_multiBarChart=[{"values":
[{"y": 6, "x": "one"},
{"y": 12, "x": "two"},
{"y": 9, "x": "three"},
{"y": 16, "x": "four"}],
"key": "Serie 1", "yAxis": "1"},
{"values":
[{"y": 8, "x": "one"},
{"y": 14, "x": "two"},
{"y": 7, "x": "three"},
{"y": 11, "x": "four"}],
"key": "Serie 2", "yAxis": "1"}];
nv.addGraph(function() {
var chart = nv.models.multiBarChart();
chart.margin({top: 30, right: 60, bottom: 20, left: 60});
var datum = data_multiBarChart;
chart.yAxis
.tickFormat(d3.format(',.2f'));
chart.showLegend(true);
d3.select('#multiBarChart svg')
.datum(datum)
.transition().duration(500)
.attr('width', 500)
.attr('height', 400)
.call(chart);
});
</script>
"""
CHART_FILENAME = "./multibarchart.html"
template_chart_nvd3 = NVD3Chart.template_environment.get_template(CHART_FILENAME)
def __init__(self, **kwargs):
super(multiBarChart, self).__init__(**kwargs)
height = kwargs.get('height', 450)
width = kwargs.get('width', None)
if kwargs.get('x_is_date', False):
self.set_date_flag(True)
self.create_x_axis('xAxis',
format=kwargs.get('x_axis_format', '%d %b %Y'),
date=True)
self.set_custom_tooltip_flag(True)
else:
self.create_x_axis('xAxis', format=kwargs.get('x_axis_format', '.2f'))
self.create_y_axis('yAxis', format=kwargs.get('y_axis_format', '.2f'))
self.set_graph_height(height)
if width:
self.set_graph_width(width)