mirror of https://github.com/Kozea/pygal.git
Python to generate nice looking SVG graph
http://pygal.org/
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245 lines
9.1 KiB
245 lines
9.1 KiB
# -*- coding: utf-8 -*- |
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# This file is part of pygal |
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# |
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# A python svg graph plotting library |
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# Copyright © 2012-2013 Kozea |
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# |
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# This library is free software: you can redistribute it and/or modify it under |
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# the terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 3 of the License, or (at your option) any |
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# later version. |
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# |
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# This library is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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# details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with pygal. If not, see <http://www.gnu.org/licenses/>. |
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from flask import Flask, render_template, Response |
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import pygal |
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from pygal.config import Config |
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from pygal.util import cut |
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from pygal.graph import CHARTS_NAMES |
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from pygal.style import styles, parametric_styles |
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from base64 import ( |
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urlsafe_b64encode as b64encode, |
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urlsafe_b64decode as b64decode) |
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import string |
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import random |
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import pickle |
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def random_label(): |
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chars = string.letters + string.digits + u' àéèçêâäëï' |
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return ''.join( |
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[random.choice(chars) |
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for i in range(random.randrange(4, 30))]) |
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def random_value(min=0, max=15): |
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return random.randrange(min, max, 1) |
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def create_app(): |
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"""Creates the pygal test web app""" |
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app = Flask(__name__) |
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def _random(data, order): |
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max = 10 ** order |
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min = 10 ** random.randrange(0, order) |
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series = [] |
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for i in range(random.randrange(1, 10)): |
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values = [( |
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random_value((-max, min)[random.randrange(0, 2)], max), |
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random_value((-max, min)[random.randrange(0, 2)], max) |
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) for i in range(data)] |
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series.append((random_label(), values)) |
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return series |
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def _random_series(type, data, order): |
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max = 10 ** order |
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min = 10 ** random.randrange(0, order) |
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series = [] |
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for i in range(random.randrange(1, 10)): |
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if type == 'Pie': |
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values = random_value(min, max) |
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elif type == 'XY': |
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values = [( |
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random_value((-max, min)[random.randrange(0, 2)], max), |
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random_value((-max, min)[random.randrange(0, 2)], max)) |
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for i in range(data)] |
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else: |
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values = [random_value((-max, min)[random.randrange(1, 2)], |
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max) for i in range(data)] |
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series.append((random_label(), values)) |
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return series |
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from .tests import get_test_routes |
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links = get_test_routes(app) |
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@app.route("/") |
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def index(): |
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return render_template( |
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'index.jinja2', styles=styles, parametric_styles=parametric_styles, |
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parametric_colors=( |
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'#ff5995', '#b6e354', '#feed6c', '#8cedff', '#9e6ffe'), |
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links=links, charts_name=CHARTS_NAMES) |
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@app.route("/svg/<type>/<series>/<config>") |
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def svg(type, series, config): |
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graph = getattr(pygal, type)(pickle.loads(b64decode(str(config)))) |
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for title, values in pickle.loads(b64decode(str(series))): |
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graph.add(title, values) |
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return graph.render_response() |
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@app.route("/sparkline/<style>") |
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@app.route("/sparkline/parameric/<style>/<color>") |
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def sparkline(style, color=None): |
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if color is None: |
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style = styles[style] |
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else: |
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style = parametric_styles[style](color) |
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line = pygal.Line(style=style, pretty_print=True) |
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line.add('_', [random.randrange(0, 10) for _ in range(25)]) |
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return Response( |
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line.render_sparkline(height=40), mimetype='image/svg+xml') |
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@app.route("/all") |
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@app.route("/all/<style>") |
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@app.route("/all/<style>/<color>") |
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@app.route("/all/<style>/<color>/<base_style>") |
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@app.route("/all/interpolate=<interpolate>") |
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def all(style='default', color=None, interpolate=None, base_style=None): |
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width, height = 600, 400 |
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data = random.randrange(1, 10) |
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order = random.randrange(1, 10) |
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if color is None: |
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style = styles[style] |
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else: |
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style = parametric_styles[style]( |
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color, base_style=styles[base_style or 'default']) |
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xy_series = _random(data, order) |
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other_series = [] |
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for title, values in xy_series: |
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other_series.append( |
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(title, cut(values, 1))) |
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xy_series = b64encode(pickle.dumps(xy_series)) |
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other_series = b64encode(pickle.dumps(other_series)) |
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config = Config() |
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config.width = width |
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config.height = height |
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config.fill = bool(random.randrange(0, 2)) |
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config.human_readable = True |
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config.interpolate = interpolate |
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config.style = style |
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config.x_labels = [random_label() for i in range(data)] |
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svgs = [] |
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for chart in pygal.CHARTS: |
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type = chart.__name__ |
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svgs.append({'type': type, |
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'series': xy_series if type == 'XY' else other_series, |
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'config': b64encode(pickle.dumps(config))}) |
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return render_template('svgs.jinja2', |
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svgs=svgs, |
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width=width, |
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height=height) |
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@app.route("/rotation") |
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def rotation(): |
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width, height = 375, 245 |
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config = Config() |
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config.width = width |
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config.height = height |
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config.fill = True |
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config.style = styles['neon'] |
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data = random.randrange(1, 10) |
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order = random.randrange(1, 10) |
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series = b64encode(pickle.dumps(_random_series(type, data, order))) |
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labels = [random_label() for i in range(data)] |
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svgs = [] |
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config.show_legend = bool(random.randrange(0, 2)) |
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for angle in range(0, 91, 5): |
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config.title = "%d rotation" % angle |
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config.x_labels = labels |
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config.x_label_rotation = angle |
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svgs.append({'type': 'Bar', |
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'series': series, |
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'config': b64encode(pickle.dumps(config))}) |
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return render_template('svgs.jinja2', |
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svgs=svgs, |
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width=width, |
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height=height) |
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@app.route("/interpolation") |
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def interpolation(): |
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width, height = 600, 400 |
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config = Config() |
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config.width = width |
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config.height = height |
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config.fill = True |
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config.style = styles['neon'] |
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data = random.randrange(1, 10) |
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order = random.randrange(1, 10) |
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series = b64encode(pickle.dumps(_random_series(type, data, order))) |
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svgs = [] |
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for interpolation in 'quadratic', 'cubic', 'lagrange', 'trigonometric': |
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config.title = "%s interpolation" % interpolation |
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config.interpolate = interpolation |
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svgs.append({'type': 'StackedLine', |
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'series': series, |
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'config': b64encode(pickle.dumps(config))}) |
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for params in [ |
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{'type': 'catmull_rom'}, |
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{'type': 'finite_difference'}, |
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{'type': 'cardinal', 'c': .25}, |
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{'type': 'cardinal', 'c': .5}, |
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{'type': 'cardinal', 'c': .75}, |
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{'type': 'cardinal', 'c': 1.5}, |
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{'type': 'cardinal', 'c': 2}, |
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{'type': 'cardinal', 'c': 5}, |
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{'type': 'kochanek_bartels', 'b': 1, 'c': 1, 't': 1}, |
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{'type': 'kochanek_bartels', 'b': -1, 'c': 1, 't': 1}, |
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{'type': 'kochanek_bartels', 'b': 1, 'c': -1, 't': 1}, |
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{'type': 'kochanek_bartels', 'b': 1, 'c': 1, 't': -1}, |
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{'type': 'kochanek_bartels', 'b': -1, 'c': 1, 't': -1}, |
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{'type': 'kochanek_bartels', 'b': -1, 'c': -1, 't': 1}, |
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{'type': 'kochanek_bartels', 'b': -1, 'c': -1, 't': -1} |
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]: |
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config.title = "Hermite interpolation with params %r" % params |
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config.interpolate = 'hermite' |
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config.interpolation_parameters = params |
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svgs.append({'type': 'StackedLine', |
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'series': series, |
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'config': b64encode(pickle.dumps(config))}) |
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return render_template('svgs.jinja2', |
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svgs=svgs, |
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width=width, |
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height=height) |
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@app.route("/raw_svgs/") |
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def raw_svgs(): |
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svgs = [] |
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for color in styles['neon'].colors: |
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chart = pygal.Pie(style=parametric_styles['RotateStyle'](color), |
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width=400, height=300) |
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chart.title = color |
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chart.disable_xml_declaration = True |
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chart.explicit_size = True |
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chart.js = [ |
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'http://l:2343/svg.jquery.js', |
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'http://l:2343/pygal-tooltips.js'] |
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for i in range(6): |
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chart.add(str(i), 2 ** i) |
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svgs.append(chart.render()) |
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return render_template('raw_svgs.jinja2', svgs=svgs) |
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return app
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