ui done kinda
This commit is contained in:
parent
1f76931dc8
commit
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console.log("bla")
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var gauge = document.getElementById('temp-gauge');
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// Randomly add a data point every 500ms
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var random = new TimeSeries();
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setInterval(function() {
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var nr = Math.random() * 100;
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random.append(new Date().getTime(), nr);
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gauge.dataset.value = nr;
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}, 500);
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function createTimeline() {
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var chart = new SmoothieChart();
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chart.addTimeSeries(random, { strokeStyle: 'rgba(0, 255, 0, 1)', fillStyle: 'rgba(0, 255, 0, 0.2)', lineWidth: 4 });
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chart.streamTo(document.getElementById("chart"), 500);
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}
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createTimeline();
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@ -0,0 +1,165 @@
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#!/usr/bin/env python3
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"""The MIT License
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Copyright (c) 2016 Arti Zirk <arti.zirk@gmail.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
|
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furnished to do so, subject to the following conditions:
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|
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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|
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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"""
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from pprint import pprint
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import json
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import random
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import base64
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from html import escape as html_escape
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from collections import deque
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from urllib.parse import parse_qs
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max_nr_messages = 25
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html = """<!DOCTYPE html>
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<head>
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<meta charset="utf-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
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<title>Temperature</title>
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<meta name="description" content="A simple message board written in python">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="shortcut icon" type="image/x-icon" href="favicon.ico" />
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<link rel="icon" type="image/x-icon" href="favicon.ico" />
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<style>
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body {{
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margin: 10px auto;
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max-width: 650px;
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line-height: 1.6;
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font-size: 18px;
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color: #444;
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padding: 0 10px
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}}
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h1,h2,h3 {{
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line-height: 1.2
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}}
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hr {{
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display: block;
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height: 1px;
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border: 0;
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border-top: 1px solid #ccc;
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margin: 1em 0;
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padding: 0;
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}}
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.temp_container {{
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display: inline-block;
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}}
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</style>
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</head>
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<body>
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<!--[if lt IE 7]>
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<p class="browsehappy">You are using an <strong>outdated</strong> browser. Please <a href="http://browsehappy.com/">upgrade your browser</a> to improve your experience.</p>
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<![endif]-->
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<h1>Temperature</h1>
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<div style="display: flex;flex-direction: row;flex-wrap: wrap;justify-content: center;align-items: center;">
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<div id="temp_container">
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<!--div style="display: inline-block; position: relative; top: -24px;">
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<input type="text" style="display: block; width: 46px; font-size: 20px; padding: 0; margin: 20px 0;">
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<button style="display:block; height:50px; width:50px;padding:10px;">set</button>
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</div-->
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<canvas data-width="100" data-height="300" data-type="linear-gauge" id="temp-gauge"></canvas>
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</div>
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</div>
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<canvas id="chart" width="650" height="100"></canvas>
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<hr>
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<small><a href="https://git.wut.ee/arti/peltier_jacket" style="color:black;">Source code</a></small>, <small>Good luck!</small>
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<script type="text/javascript" src="/smoothie.js"></script>
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<script type="text/javascript" src="/gauge.min.js"></script>
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<script type="text/javascript" src="/main.js"></script>
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</body>
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</html>
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"""
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def application(env, start_response):
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if env["REQUEST_METHOD"] == "POST":
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try:
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l = int(env.get('CONTENT_LENGTH', 0))
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except KeyError:
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start_response('411 Length Required', [('Content-Type', 'application/json')])
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return [json.dumps({"error":{"code":411, "message": "Content-Length header missing"}}).encode()]
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if l > 150:
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start_response('413 Payload Too Large', [('Content-Type', 'application/json')])
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return [json.dumps({"error":{"code":413, "message": "Payload Too Large"}}).encode()]
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message = env['wsgi.input'].read(l).decode()
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if not message:
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start_response('400 Bad Request', [('Content-Type', 'application/json')])
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return [json.dumps({"error":{"code":400, "message": "message not provided"}}).encode()]
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try:
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message = json.loads(message)["message"]
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except json.decoder.JSONDecodeError:
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pass
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except KeyError:
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start_response('400 Bad Request', [('Content-Type', 'application/json')])
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return [json.dumps({"error":{"code":400, "message": "message key missing from json payload data"}}).encode()]
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if message.startswith("message="):
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message = parse_qs(message)["message"][0]
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messages.appendleft(html_escape(message.strip()))
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#start_response("200 OK", [('Content-Type', 'application/json')])
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if env["PATH_INFO"] == "/favicon.ico":
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start_response('200 OK', [('Content-Type', 'image/x-icon')])
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return []
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elif env["PATH_INFO"] == "/smoothie.js":
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start_response('200 OK', [('Content-Type', 'application/javascript')])
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with open("smoothie.js", "rb") as f:
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return [f.read()]
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elif env["PATH_INFO"] == "/gauge.min.js":
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start_response('200 OK', [('Content-Type', 'application/javascript')])
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with open("gauge.min.js", "rb") as f:
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return [f.read()]
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elif env["PATH_INFO"] == "/main.js":
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start_response('200 OK', [('Content-Type', 'application/javascript')])
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with open("main.js", "rb") as f:
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return [f.read()]
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start_response('200 OK', [('Content-Type', 'text/html')])
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return [html.format().encode()]
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if __name__ == "__main__":
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from wsgiref.simple_server import make_server
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httpd = make_server('0.0.0.0', 8080, application)
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print("Serving on http://0.0.0.0:8080/")
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httpd.serve_forever()
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// MIT License:
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//
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// Copyright (c) 2010-2013, Joe Walnes
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// 2013-2014, Drew Noakes
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// 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:
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//
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// The above copyright notice and this permission notice shall be included in
|
||||
// all copies or substantial portions of the Software.
|
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//
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// 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,
|
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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/**
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* Smoothie Charts - http://smoothiecharts.org/
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* (c) 2010-2013, Joe Walnes
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* 2013-2014, Drew Noakes
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*
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* v1.0: Main charting library, by Joe Walnes
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* v1.1: Auto scaling of axis, by Neil Dunn
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* v1.2: fps (frames per second) option, by Mathias Petterson
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* v1.3: Fix for divide by zero, by Paul Nikitochkin
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* v1.4: Set minimum, top-scale padding, remove timeseries, add optional timer to reset bounds, by Kelley Reynolds
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* v1.5: Set default frames per second to 50... smoother.
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* .start(), .stop() methods for conserving CPU, by Dmitry Vyal
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* options.interpolation = 'bezier' or 'line', by Dmitry Vyal
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* options.maxValue to fix scale, by Dmitry Vyal
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* v1.6: minValue/maxValue will always get converted to floats, by Przemek Matylla
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* v1.7: options.grid.fillStyle may be a transparent color, by Dmitry A. Shashkin
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* Smooth rescaling, by Kostas Michalopoulos
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* v1.8: Set max length to customize number of live points in the dataset with options.maxDataSetLength, by Krishna Narni
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* v1.9: Display timestamps along the bottom, by Nick and Stev-io
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* (https://groups.google.com/forum/?fromgroups#!topic/smoothie-charts/-Ywse8FCpKI%5B1-25%5D)
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* Refactored by Krishna Narni, to support timestamp formatting function
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* v1.10: Switch to requestAnimationFrame, removed the now obsoleted options.fps, by Gergely Imreh
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* v1.11: options.grid.sharpLines option added, by @drewnoakes
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* Addressed warning seen in Firefox when seriesOption.fillStyle undefined, by @drewnoakes
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* v1.12: Support for horizontalLines added, by @drewnoakes
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* Support for yRangeFunction callback added, by @drewnoakes
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* v1.13: Fixed typo (#32), by @alnikitich
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* v1.14: Timer cleared when last TimeSeries removed (#23), by @davidgaleano
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* Fixed diagonal line on chart at start/end of data stream, by @drewnoakes
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* v1.15: Support for npm package (#18), by @dominictarr
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* Fixed broken removeTimeSeries function (#24) by @davidgaleano
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* Minor performance and tidying, by @drewnoakes
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* v1.16: Bug fix introduced in v1.14 relating to timer creation/clearance (#23), by @drewnoakes
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* TimeSeries.append now deals with out-of-order timestamps, and can merge duplicates, by @zacwitte (#12)
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* Documentation and some local variable renaming for clarity, by @drewnoakes
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* v1.17: Allow control over font size (#10), by @drewnoakes
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* Timestamp text won't overlap, by @drewnoakes
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* v1.18: Allow control of max/min label precision, by @drewnoakes
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* Added 'borderVisible' chart option, by @drewnoakes
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* Allow drawing series with fill but no stroke (line), by @drewnoakes
|
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* v1.19: Avoid unnecessary repaints, and fixed flicker in old browsers having multiple charts in document (#40), by @asbai
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* v1.20: Add SmoothieChart.getTimeSeriesOptions and SmoothieChart.bringToFront functions, by @drewnoakes
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* v1.21: Add 'step' interpolation mode, by @drewnoakes
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* v1.22: Add support for different pixel ratios. Also add optional y limit formatters, by @copacetic
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* v1.23: Fix bug introduced in v1.22 (#44), by @drewnoakes
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* v1.24: Fix bug introduced in v1.23, re-adding parseFloat to y-axis formatter defaults, by @siggy_sf
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* v1.25: Fix bug seen when adding a data point to TimeSeries which is older than the current data, by @Nking92
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* Draw time labels on top of series, by @comolosabia
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* Add TimeSeries.clear function, by @drewnoakes
|
||||
* v1.26: Add support for resizing on high device pixel ratio screens, by @copacetic
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* v1.27: Fix bug introduced in v1.26 for non whole number devicePixelRatio values, by @zmbush
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||||
* v1.28: Add 'minValueScale' option, by @megawac
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||||
*/
|
||||
|
||||
;(function(exports) {
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||||
|
||||
var Util = {
|
||||
extend: function() {
|
||||
arguments[0] = arguments[0] || {};
|
||||
for (var i = 1; i < arguments.length; i++)
|
||||
{
|
||||
for (var key in arguments[i])
|
||||
{
|
||||
if (arguments[i].hasOwnProperty(key))
|
||||
{
|
||||
if (typeof(arguments[i][key]) === 'object') {
|
||||
if (arguments[i][key] instanceof Array) {
|
||||
arguments[0][key] = arguments[i][key];
|
||||
} else {
|
||||
arguments[0][key] = Util.extend(arguments[0][key], arguments[i][key]);
|
||||
}
|
||||
} else {
|
||||
arguments[0][key] = arguments[i][key];
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
return arguments[0];
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Initialises a new <code>TimeSeries</code> with optional data options.
|
||||
*
|
||||
* Options are of the form (defaults shown):
|
||||
*
|
||||
* <pre>
|
||||
* {
|
||||
* resetBounds: true, // enables/disables automatic scaling of the y-axis
|
||||
* resetBoundsInterval: 3000 // the period between scaling calculations, in millis
|
||||
* }
|
||||
* </pre>
|
||||
*
|
||||
* Presentation options for TimeSeries are specified as an argument to <code>SmoothieChart.addTimeSeries</code>.
|
||||
*
|
||||
* @constructor
|
||||
*/
|
||||
function TimeSeries(options) {
|
||||
this.options = Util.extend({}, TimeSeries.defaultOptions, options);
|
||||
this.clear();
|
||||
}
|
||||
|
||||
TimeSeries.defaultOptions = {
|
||||
resetBoundsInterval: 3000,
|
||||
resetBounds: true
|
||||
};
|
||||
|
||||
/**
|
||||
* Clears all data and state from this TimeSeries object.
|
||||
*/
|
||||
TimeSeries.prototype.clear = function() {
|
||||
this.data = [];
|
||||
this.maxValue = Number.NaN; // The maximum value ever seen in this TimeSeries.
|
||||
this.minValue = Number.NaN; // The minimum value ever seen in this TimeSeries.
|
||||
};
|
||||
|
||||
/**
|
||||
* Recalculate the min/max values for this <code>TimeSeries</code> object.
|
||||
*
|
||||
* This causes the graph to scale itself in the y-axis.
|
||||
*/
|
||||
TimeSeries.prototype.resetBounds = function() {
|
||||
if (this.data.length) {
|
||||
// Walk through all data points, finding the min/max value
|
||||
this.maxValue = this.data[0][1];
|
||||
this.minValue = this.data[0][1];
|
||||
for (var i = 1; i < this.data.length; i++) {
|
||||
var value = this.data[i][1];
|
||||
if (value > this.maxValue) {
|
||||
this.maxValue = value;
|
||||
}
|
||||
if (value < this.minValue) {
|
||||
this.minValue = value;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
// No data exists, so set min/max to NaN
|
||||
this.maxValue = Number.NaN;
|
||||
this.minValue = Number.NaN;
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Adds a new data point to the <code>TimeSeries</code>, preserving chronological order.
|
||||
*
|
||||
* @param timestamp the position, in time, of this data point
|
||||
* @param value the value of this data point
|
||||
* @param sumRepeatedTimeStampValues if <code>timestamp</code> has an exact match in the series, this flag controls
|
||||
* whether it is replaced, or the values summed (defaults to false.)
|
||||
*/
|
||||
TimeSeries.prototype.append = function(timestamp, value, sumRepeatedTimeStampValues) {
|
||||
// Rewind until we hit an older timestamp
|
||||
var i = this.data.length - 1;
|
||||
while (i >= 0 && this.data[i][0] > timestamp) {
|
||||
i--;
|
||||
}
|
||||
|
||||
if (i === -1) {
|
||||
// This new item is the oldest data
|
||||
this.data.splice(0, 0, [timestamp, value]);
|
||||
} else if (this.data.length > 0 && this.data[i][0] === timestamp) {
|
||||
// Update existing values in the array
|
||||
if (sumRepeatedTimeStampValues) {
|
||||
// Sum this value into the existing 'bucket'
|
||||
this.data[i][1] += value;
|
||||
value = this.data[i][1];
|
||||
} else {
|
||||
// Replace the previous value
|
||||
this.data[i][1] = value;
|
||||
}
|
||||
} else if (i < this.data.length - 1) {
|
||||
// Splice into the correct position to keep timestamps in order
|
||||
this.data.splice(i + 1, 0, [timestamp, value]);
|
||||
} else {
|
||||
// Add to the end of the array
|
||||
this.data.push([timestamp, value]);
|
||||
}
|
||||
|
||||
this.maxValue = isNaN(this.maxValue) ? value : Math.max(this.maxValue, value);
|
||||
this.minValue = isNaN(this.minValue) ? value : Math.min(this.minValue, value);
|
||||
};
|
||||
|
||||
TimeSeries.prototype.dropOldData = function(oldestValidTime, maxDataSetLength) {
|
||||
// We must always keep one expired data point as we need this to draw the
|
||||
// line that comes into the chart from the left, but any points prior to that can be removed.
|
||||
var removeCount = 0;
|
||||
while (this.data.length - removeCount >= maxDataSetLength && this.data[removeCount + 1][0] < oldestValidTime) {
|
||||
removeCount++;
|
||||
}
|
||||
if (removeCount !== 0) {
|
||||
this.data.splice(0, removeCount);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Initialises a new <code>SmoothieChart</code>.
|
||||
*
|
||||
* Options are optional, and should be of the form below. Just specify the values you
|
||||
* need and the rest will be given sensible defaults as shown:
|
||||
*
|
||||
* <pre>
|
||||
* {
|
||||
* minValue: undefined, // specify to clamp the lower y-axis to a given value
|
||||
* maxValue: undefined, // specify to clamp the upper y-axis to a given value
|
||||
* maxValueScale: 1, // allows proportional padding to be added above the chart. for 10% padding, specify 1.1.
|
||||
* minValueScale: 1, // allows proportional padding to be added below the chart. for 10% padding, specify 1.1.
|
||||
* yRangeFunction: undefined, // function({min: , max: }) { return {min: , max: }; }
|
||||
* scaleSmoothing: 0.125, // controls the rate at which y-value zoom animation occurs
|
||||
* millisPerPixel: 20, // sets the speed at which the chart pans by
|
||||
* enableDpiScaling: true, // support rendering at different DPI depending on the device
|
||||
* yMinFormatter: function(min, precision) { // callback function that formats the min y value label
|
||||
* return parseFloat(min).toFixed(precision);
|
||||
* },
|
||||
* yMaxFormatter: function(max, precision) { // callback function that formats the max y value label
|
||||
* return parseFloat(max).toFixed(precision);
|
||||
* },
|
||||
* maxDataSetLength: 2,
|
||||
* interpolation: 'bezier' // one of 'bezier', 'linear', or 'step'
|
||||
* timestampFormatter: null, // optional function to format time stamps for bottom of chart
|
||||
* // you may use SmoothieChart.timeFormatter, or your own: function(date) { return ''; }
|
||||
* scrollBackwards: false, // reverse the scroll direction of the chart
|
||||
* horizontalLines: [], // [ { value: 0, color: '#ffffff', lineWidth: 1 } ]
|
||||
* grid:
|
||||
* {
|
||||
* fillStyle: '#000000', // the background colour of the chart
|
||||
* lineWidth: 1, // the pixel width of grid lines
|
||||
* strokeStyle: '#777777', // colour of grid lines
|
||||
* millisPerLine: 1000, // distance between vertical grid lines
|
||||
* sharpLines: false, // controls whether grid lines are 1px sharp, or softened
|
||||
* verticalSections: 2, // number of vertical sections marked out by horizontal grid lines
|
||||
* borderVisible: true // whether the grid lines trace the border of the chart or not
|
||||
* },
|
||||
* labels
|
||||
* {
|
||||
* disabled: false, // enables/disables labels showing the min/max values
|
||||
* fillStyle: '#ffffff', // colour for text of labels,
|
||||
* fontSize: 15,
|
||||
* fontFamily: 'sans-serif',
|
||||
* precision: 2
|
||||
* }
|
||||
* }
|
||||
* </pre>
|
||||
*
|
||||
* @constructor
|
||||
*/
|
||||
function SmoothieChart(options) {
|
||||
this.options = Util.extend({}, SmoothieChart.defaultChartOptions, options);
|
||||
this.seriesSet = [];
|
||||
this.currentValueRange = 1;
|
||||
this.currentVisMinValue = 0;
|
||||
this.lastRenderTimeMillis = 0;
|
||||
}
|
||||
|
||||
SmoothieChart.defaultChartOptions = {
|
||||
millisPerPixel: 20,
|
||||
enableDpiScaling: true,
|
||||
yMinFormatter: function(min, precision) {
|
||||
return parseFloat(min).toFixed(precision);
|
||||
},
|
||||
yMaxFormatter: function(max, precision) {
|
||||
return parseFloat(max).toFixed(precision);
|
||||
},
|
||||
maxValueScale: 1,
|
||||
minValueScale: 1,
|
||||
interpolation: 'bezier',
|
||||
scaleSmoothing: 0.125,
|
||||
maxDataSetLength: 2,
|
||||
scrollBackwards: false,
|
||||
grid: {
|
||||
fillStyle: '#000000',
|
||||
strokeStyle: '#777777',
|
||||
lineWidth: 1,
|
||||
sharpLines: false,
|
||||
millisPerLine: 1000,
|
||||
verticalSections: 2,
|
||||
borderVisible: true
|
||||
},
|
||||
labels: {
|
||||
fillStyle: '#ffffff',
|
||||
disabled: false,
|
||||
fontSize: 10,
|
||||
fontFamily: 'monospace',
|
||||
precision: 2
|
||||
},
|
||||
horizontalLines: []
|
||||
};
|
||||
|
||||
// Based on http://inspirit.github.com/jsfeat/js/compatibility.js
|
||||
SmoothieChart.AnimateCompatibility = (function() {
|
||||
var requestAnimationFrame = function(callback, element) {
|
||||
var requestAnimationFrame =
|
||||
window.requestAnimationFrame ||
|
||||
window.webkitRequestAnimationFrame ||
|
||||
window.mozRequestAnimationFrame ||
|
||||
window.oRequestAnimationFrame ||
|
||||
window.msRequestAnimationFrame ||
|
||||
function(callback) {
|
||||
return window.setTimeout(function() {
|
||||
callback(new Date().getTime());
|
||||
}, 16);
|
||||
};
|
||||
return requestAnimationFrame.call(window, callback, element);
|
||||
},
|
||||
cancelAnimationFrame = function(id) {
|
||||
var cancelAnimationFrame =
|
||||
window.cancelAnimationFrame ||
|
||||
function(id) {
|
||||
clearTimeout(id);
|
||||
};
|
||||
return cancelAnimationFrame.call(window, id);
|
||||
};
|
||||
|
||||
return {
|
||||
requestAnimationFrame: requestAnimationFrame,
|
||||
cancelAnimationFrame: cancelAnimationFrame
|
||||
};
|
||||
})();
|
||||
|
||||
SmoothieChart.defaultSeriesPresentationOptions = {
|
||||
lineWidth: 1,
|
||||
strokeStyle: '#ffffff'
|
||||
};
|
||||
|
||||
/**
|
||||
* Adds a <code>TimeSeries</code> to this chart, with optional presentation options.
|
||||
*
|
||||
* Presentation options should be of the form (defaults shown):
|
||||
*
|
||||
* <pre>
|
||||
* {
|
||||
* lineWidth: 1,
|
||||
* strokeStyle: '#ffffff',
|
||||
* fillStyle: undefined
|
||||
* }
|
||||
* </pre>
|
||||
*/
|
||||
SmoothieChart.prototype.addTimeSeries = function(timeSeries, options) {
|
||||
this.seriesSet.push({timeSeries: timeSeries, options: Util.extend({}, SmoothieChart.defaultSeriesPresentationOptions, options)});
|
||||
if (timeSeries.options.resetBounds && timeSeries.options.resetBoundsInterval > 0) {
|
||||
timeSeries.resetBoundsTimerId = setInterval(
|
||||
function() {
|
||||
timeSeries.resetBounds();
|
||||
},
|
||||
timeSeries.options.resetBoundsInterval
|
||||
);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Removes the specified <code>TimeSeries</code> from the chart.
|
||||
*/
|
||||
SmoothieChart.prototype.removeTimeSeries = function(timeSeries) {
|
||||
// Find the correct timeseries to remove, and remove it
|
||||
var numSeries = this.seriesSet.length;
|
||||
for (var i = 0; i < numSeries; i++) {
|
||||
if (this.seriesSet[i].timeSeries === timeSeries) {
|
||||
this.seriesSet.splice(i, 1);
|
||||
break;
|
||||
}
|
||||
}
|
||||
// If a timer was operating for that timeseries, remove it
|
||||
if (timeSeries.resetBoundsTimerId) {
|
||||
// Stop resetting the bounds, if we were
|
||||
clearInterval(timeSeries.resetBoundsTimerId);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Gets render options for the specified <code>TimeSeries</code>.
|
||||
*
|
||||
* As you may use a single <code>TimeSeries</code> in multiple charts with different formatting in each usage,
|
||||
* these settings are stored in the chart.
|
||||
*/
|
||||
SmoothieChart.prototype.getTimeSeriesOptions = function(timeSeries) {
|
||||
// Find the correct timeseries to remove, and remove it
|
||||
var numSeries = this.seriesSet.length;
|
||||
for (var i = 0; i < numSeries; i++) {
|
||||
if (this.seriesSet[i].timeSeries === timeSeries) {
|
||||
return this.seriesSet[i].options;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Brings the specified <code>TimeSeries</code> to the top of the chart. It will be rendered last.
|
||||
*/
|
||||
SmoothieChart.prototype.bringToFront = function(timeSeries) {
|
||||
// Find the correct timeseries to remove, and remove it
|
||||
var numSeries = this.seriesSet.length;
|
||||
for (var i = 0; i < numSeries; i++) {
|
||||
if (this.seriesSet[i].timeSeries === timeSeries) {
|
||||
var set = this.seriesSet.splice(i, 1);
|
||||
this.seriesSet.push(set[0]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Instructs the <code>SmoothieChart</code> to start rendering to the provided canvas, with specified delay.
|
||||
*
|
||||
* @param canvas the target canvas element
|
||||
* @param delayMillis an amount of time to wait before a data point is shown. This can prevent the end of the series
|
||||
* from appearing on screen, with new values flashing into view, at the expense of some latency.
|
||||
*/
|
||||
SmoothieChart.prototype.streamTo = function(canvas, delayMillis) {
|
||||
this.canvas = canvas;
|
||||
this.delay = delayMillis;
|
||||
this.start();
|
||||
};
|
||||
|
||||
/**
|
||||
* Make sure the canvas has the optimal resolution for the device's pixel ratio.
|
||||
*/
|
||||
SmoothieChart.prototype.resize = function() {
|
||||
// TODO this function doesn't handle the value of enableDpiScaling changing during execution
|
||||
if (!this.options.enableDpiScaling || !window || window.devicePixelRatio === 1)
|
||||
return;
|
||||
|
||||
var dpr = window.devicePixelRatio;
|
||||
var width = parseInt(this.canvas.getAttribute('width'));
|
||||
var height = parseInt(this.canvas.getAttribute('height'));
|
||||
|
||||
if (!this.originalWidth || (Math.floor(this.originalWidth * dpr) !== width)) {
|
||||
this.originalWidth = width;
|
||||
this.canvas.setAttribute('width', (Math.floor(width * dpr)).toString());
|
||||
this.canvas.style.width = width + 'px';
|
||||
this.canvas.getContext('2d').scale(dpr, dpr);
|
||||
}
|
||||
|
||||
if (!this.originalHeight || (Math.floor(this.originalHeight * dpr) !== height)) {
|
||||
this.originalHeight = height;
|
||||
this.canvas.setAttribute('height', (Math.floor(height * dpr)).toString());
|
||||
this.canvas.style.height = height + 'px';
|
||||
this.canvas.getContext('2d').scale(dpr, dpr);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Starts the animation of this chart.
|
||||
*/
|
||||
SmoothieChart.prototype.start = function() {
|
||||
if (this.frame) {
|
||||
// We're already running, so just return
|
||||
return;
|
||||
}
|
||||
|
||||
// Renders a frame, and queues the next frame for later rendering
|
||||
var animate = function() {
|
||||
this.frame = SmoothieChart.AnimateCompatibility.requestAnimationFrame(function() {
|
||||
this.render();
|
||||
animate();
|
||||
}.bind(this));
|
||||
}.bind(this);
|
||||
|
||||
animate();
|
||||
};
|
||||
|
||||
/**
|
||||
* Stops the animation of this chart.
|
||||
*/
|
||||
SmoothieChart.prototype.stop = function() {
|
||||
if (this.frame) {
|
||||
SmoothieChart.AnimateCompatibility.cancelAnimationFrame(this.frame);
|
||||
delete this.frame;
|
||||
}
|
||||
};
|
||||
|
||||
SmoothieChart.prototype.updateValueRange = function() {
|
||||
// Calculate the current scale of the chart, from all time series.
|
||||
var chartOptions = this.options,
|
||||
chartMaxValue = Number.NaN,
|
||||
chartMinValue = Number.NaN;
|
||||
|
||||
for (var d = 0; d < this.seriesSet.length; d++) {
|
||||
// TODO(ndunn): We could calculate / track these values as they stream in.
|
||||
var timeSeries = this.seriesSet[d].timeSeries;
|
||||
if (!isNaN(timeSeries.maxValue)) {
|
||||
chartMaxValue = !isNaN(chartMaxValue) ? Math.max(chartMaxValue, timeSeries.maxValue) : timeSeries.maxValue;
|
||||
}
|
||||
|
||||
if (!isNaN(timeSeries.minValue)) {
|
||||
chartMinValue = !isNaN(chartMinValue) ? Math.min(chartMinValue, timeSeries.minValue) : timeSeries.minValue;
|
||||
}
|
||||
}
|
||||
|
||||
// Scale the chartMaxValue to add padding at the top if required
|
||||
if (chartOptions.maxValue != null) {
|
||||
chartMaxValue = chartOptions.maxValue;
|
||||
} else {
|
||||
chartMaxValue *= chartOptions.maxValueScale;
|
||||
}
|
||||
|
||||
// Set the minimum if we've specified one
|
||||
if (chartOptions.minValue != null) {
|
||||
chartMinValue = chartOptions.minValue;
|
||||
} else {
|
||||
chartMinValue -= Math.abs(chartMinValue * chartOptions.minValueScale - chartMinValue);
|
||||
}
|
||||
|
||||
// If a custom range function is set, call it
|
||||
if (this.options.yRangeFunction) {
|
||||
var range = this.options.yRangeFunction({min: chartMinValue, max: chartMaxValue});
|
||||
chartMinValue = range.min;
|
||||
chartMaxValue = range.max;
|
||||
}
|
||||
|
||||
if (!isNaN(chartMaxValue) && !isNaN(chartMinValue)) {
|
||||
var targetValueRange = chartMaxValue - chartMinValue;
|
||||
var valueRangeDiff = (targetValueRange - this.currentValueRange);
|
||||
var minValueDiff = (chartMinValue - this.currentVisMinValue);
|
||||
this.isAnimatingScale = Math.abs(valueRangeDiff) > 0.1 || Math.abs(minValueDiff) > 0.1;
|
||||
this.currentValueRange += chartOptions.scaleSmoothing * valueRangeDiff;
|
||||
this.currentVisMinValue += chartOptions.scaleSmoothing * minValueDiff;
|
||||
}
|
||||
|
||||
this.valueRange = { min: chartMinValue, max: chartMaxValue };
|
||||
};
|
||||
|
||||
SmoothieChart.prototype.render = function(canvas, time) {
|
||||
var nowMillis = new Date().getTime();
|
||||
|
||||
if (!this.isAnimatingScale) {
|
||||
// We're not animating. We can use the last render time and the scroll speed to work out whether
|
||||
// we actually need to paint anything yet. If not, we can return immediately.
|
||||
|
||||
// Render at least every 1/6th of a second. The canvas may be resized, which there is
|
||||
// no reliable way to detect.
|
||||
var maxIdleMillis = Math.min(1000/6, this.options.millisPerPixel);
|
||||
|
||||
if (nowMillis - this.lastRenderTimeMillis < maxIdleMillis) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
this.resize();
|
||||
|
||||
this.lastRenderTimeMillis = nowMillis;
|
||||
|
||||
canvas = canvas || this.canvas;
|
||||
time = time || nowMillis - (this.delay || 0);
|
||||
|
||||
// Round time down to pixel granularity, so motion appears smoother.
|
||||
time -= time % this.options.millisPerPixel;
|
||||
|
||||
var context = canvas.getContext('2d'),
|
||||
chartOptions = this.options,
|
||||
dimensions = { top: 0, left: 0, width: canvas.clientWidth, height: canvas.clientHeight },
|
||||
// Calculate the threshold time for the oldest data points.
|
||||
oldestValidTime = time - (dimensions.width * chartOptions.millisPerPixel),
|
||||
valueToYPixel = function(value) {
|
||||
var offset = value - this.currentVisMinValue;
|
||||
return this.currentValueRange === 0
|
||||
? dimensions.height
|
||||
: dimensions.height - (Math.round((offset / this.currentValueRange) * dimensions.height));
|
||||
}.bind(this),
|
||||
timeToXPixel = function(t) {
|
||||
if(chartOptions.scrollBackwards) {
|
||||
return Math.round((time - t) / chartOptions.millisPerPixel);
|
||||
}
|
||||
return Math.round(dimensions.width - ((time - t) / chartOptions.millisPerPixel));
|
||||
};
|
||||
|
||||
this.updateValueRange();
|
||||
|
||||
context.font = chartOptions.labels.fontSize + 'px ' + chartOptions.labels.fontFamily;
|
||||
|
||||
// Save the state of the canvas context, any transformations applied in this method
|
||||
// will get removed from the stack at the end of this method when .restore() is called.
|
||||
context.save();
|
||||
|
||||
// Move the origin.
|
||||
context.translate(dimensions.left, dimensions.top);
|
||||
|
||||
// Create a clipped rectangle - anything we draw will be constrained to this rectangle.
|
||||
// This prevents the occasional pixels from curves near the edges overrunning and creating
|
||||
// screen cheese (that phrase should need no explanation).
|
||||
context.beginPath();
|
||||
context.rect(0, 0, dimensions.width, dimensions.height);
|
||||
context.clip();
|
||||
|
||||
// Clear the working area.
|
||||
context.save();
|
||||
context.fillStyle = chartOptions.grid.fillStyle;
|
||||
context.clearRect(0, 0, dimensions.width, dimensions.height);
|
||||
context.fillRect(0, 0, dimensions.width, dimensions.height);
|
||||
context.restore();
|
||||
|
||||
// Grid lines...
|
||||
context.save();
|
||||
context.lineWidth = chartOptions.grid.lineWidth;
|
||||
context.strokeStyle = chartOptions.grid.strokeStyle;
|
||||
// Vertical (time) dividers.
|
||||
if (chartOptions.grid.millisPerLine > 0) {
|
||||
context.beginPath();
|
||||
for (var t = time - (time % chartOptions.grid.millisPerLine);
|
||||
t >= oldestValidTime;
|
||||
t -= chartOptions.grid.millisPerLine) {
|
||||
var gx = timeToXPixel(t);
|
||||
if (chartOptions.grid.sharpLines) {
|
||||
gx -= 0.5;
|
||||
}
|
||||
context.moveTo(gx, 0);
|
||||
context.lineTo(gx, dimensions.height);
|
||||
}
|
||||
context.stroke();
|
||||
context.closePath();
|
||||
}
|
||||
|
||||
// Horizontal (value) dividers.
|
||||
for (var v = 1; v < chartOptions.grid.verticalSections; v++) {
|
||||
var gy = Math.round(v * dimensions.height / chartOptions.grid.verticalSections);
|
||||
if (chartOptions.grid.sharpLines) {
|
||||
gy -= 0.5;
|
||||
}
|
||||
context.beginPath();
|
||||
context.moveTo(0, gy);
|
||||
context.lineTo(dimensions.width, gy);
|
||||
context.stroke();
|
||||
context.closePath();
|
||||
}
|
||||
// Bounding rectangle.
|
||||
if (chartOptions.grid.borderVisible) {
|
||||
context.beginPath();
|
||||
context.strokeRect(0, 0, dimensions.width, dimensions.height);
|
||||
context.closePath();
|
||||
}
|
||||
context.restore();
|
||||
|
||||
// Draw any horizontal lines...
|
||||
if (chartOptions.horizontalLines && chartOptions.horizontalLines.length) {
|
||||
for (var hl = 0; hl < chartOptions.horizontalLines.length; hl++) {
|
||||
var line = chartOptions.horizontalLines[hl],
|
||||
hly = Math.round(valueToYPixel(line.value)) - 0.5;
|
||||
context.strokeStyle = line.color || '#ffffff';
|
||||
context.lineWidth = line.lineWidth || 1;
|
||||
context.beginPath();
|
||||
context.moveTo(0, hly);
|
||||
context.lineTo(dimensions.width, hly);
|
||||
context.stroke();
|
||||
context.closePath();
|
||||
}
|
||||
}
|
||||
|
||||
// For each data set...
|
||||
for (var d = 0; d < this.seriesSet.length; d++) {
|
||||
context.save();
|
||||
var timeSeries = this.seriesSet[d].timeSeries,
|
||||
dataSet = timeSeries.data,
|
||||
seriesOptions = this.seriesSet[d].options;
|
||||
|
||||
// Delete old data that's moved off the left of the chart.
|
||||
timeSeries.dropOldData(oldestValidTime, chartOptions.maxDataSetLength);
|
||||
|
||||
// Set style for this dataSet.
|
||||
context.lineWidth = seriesOptions.lineWidth;
|
||||
context.strokeStyle = seriesOptions.strokeStyle;
|
||||
// Draw the line...
|
||||
context.beginPath();
|
||||
// Retain lastX, lastY for calculating the control points of bezier curves.
|
||||
var firstX = 0, lastX = 0, lastY = 0;
|
||||
for (var i = 0; i < dataSet.length && dataSet.length !== 1; i++) {
|
||||
var x = timeToXPixel(dataSet[i][0]),
|
||||
y = valueToYPixel(dataSet[i][1]);
|
||||
|
||||
if (i === 0) {
|
||||
firstX = x;
|
||||
context.moveTo(x, y);
|
||||
} else {
|
||||
switch (chartOptions.interpolation) {
|
||||
case "linear":
|
||||
case "line": {
|
||||
context.lineTo(x,y);
|
||||
break;
|
||||
}
|
||||
case "bezier":
|
||||
default: {
|
||||
// Great explanation of Bezier curves: http://en.wikipedia.org/wiki/Bezier_curve#Quadratic_curves
|
||||
//
|
||||
// Assuming A was the last point in the line plotted and B is the new point,
|
||||
// we draw a curve with control points P and Q as below.
|
||||
//
|
||||
// A---P
|
||||
// |
|
||||
// |
|
||||
// |
|
||||
// Q---B
|
||||
//
|
||||
// Importantly, A and P are at the same y coordinate, as are B and Q. This is
|
||||
// so adjacent curves appear to flow as one.
|
||||
//
|
||||
context.bezierCurveTo( // startPoint (A) is implicit from last iteration of loop
|
||||
Math.round((lastX + x) / 2), lastY, // controlPoint1 (P)
|
||||
Math.round((lastX + x)) / 2, y, // controlPoint2 (Q)
|
||||
x, y); // endPoint (B)
|
||||
break;
|
||||
}
|
||||
case "step": {
|
||||
context.lineTo(x,lastY);
|
||||
context.lineTo(x,y);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
lastX = x; lastY = y;
|
||||
}
|
||||
|
||||
if (dataSet.length > 1) {
|
||||
if (seriesOptions.fillStyle) {
|
||||
// Close up the fill region.
|
||||
context.lineTo(dimensions.width + seriesOptions.lineWidth + 1, lastY);
|
||||
context.lineTo(dimensions.width + seriesOptions.lineWidth + 1, dimensions.height + seriesOptions.lineWidth + 1);
|
||||
context.lineTo(firstX, dimensions.height + seriesOptions.lineWidth);
|
||||
context.fillStyle = seriesOptions.fillStyle;
|
||||
context.fill();
|
||||
}
|
||||
|
||||
if (seriesOptions.strokeStyle && seriesOptions.strokeStyle !== 'none') {
|
||||
context.stroke();
|
||||
}
|
||||
context.closePath();
|
||||
}
|
||||
context.restore();
|
||||
}
|
||||
|
||||
// Draw the axis values on the chart.
|
||||
if (!chartOptions.labels.disabled && !isNaN(this.valueRange.min) && !isNaN(this.valueRange.max)) {
|
||||
var maxValueString = chartOptions.yMaxFormatter(this.valueRange.max, chartOptions.labels.precision),
|
||||
minValueString = chartOptions.yMinFormatter(this.valueRange.min, chartOptions.labels.precision),
|
||||
labelPos = chartOptions.scrollBackwards ? 0 : dimensions.width - context.measureText(maxValueString).width - 2;
|
||||
context.fillStyle = chartOptions.labels.fillStyle;
|
||||
context.fillText(maxValueString, labelPos, chartOptions.labels.fontSize);
|
||||
context.fillText(minValueString, labelPos, dimensions.height - 2);
|
||||
}
|
||||
|
||||
// Display timestamps along x-axis at the bottom of the chart.
|
||||
if (chartOptions.timestampFormatter && chartOptions.grid.millisPerLine > 0) {
|
||||
var textUntilX = chartOptions.scrollBackwards
|
||||
? context.measureText(minValueString).width
|
||||
: dimensions.width - context.measureText(minValueString).width + 4;
|
||||
for (var t = time - (time % chartOptions.grid.millisPerLine);
|
||||
t >= oldestValidTime;
|
||||
t -= chartOptions.grid.millisPerLine) {
|
||||
var gx = timeToXPixel(t);
|
||||
// Only draw the timestamp if it won't overlap with the previously drawn one.
|
||||
if ((!chartOptions.scrollBackwards && gx < textUntilX) || (chartOptions.scrollBackwards && gx > textUntilX)) {
|
||||
// Formats the timestamp based on user specified formatting function
|
||||
// SmoothieChart.timeFormatter function above is one such formatting option
|
||||
var tx = new Date(t),
|
||||
ts = chartOptions.timestampFormatter(tx),
|
||||
tsWidth = context.measureText(ts).width;
|
||||
|
||||
textUntilX = chartOptions.scrollBackwards
|
||||
? gx + tsWidth + 2
|
||||
: gx - tsWidth - 2;
|
||||
|
||||
context.fillStyle = chartOptions.labels.fillStyle;
|
||||
if(chartOptions.scrollBackwards) {
|
||||
context.fillText(ts, gx, dimensions.height - 2);
|
||||
} else {
|
||||
context.fillText(ts, gx - tsWidth, dimensions.height - 2);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
context.restore(); // See .save() above.
|
||||
};
|
||||
|
||||
// Sample timestamp formatting function
|
||||
SmoothieChart.timeFormatter = function(date) {
|
||||
function pad2(number) { return (number < 10 ? '0' : '') + number }
|
||||
return pad2(date.getHours()) + ':' + pad2(date.getMinutes()) + ':' + pad2(date.getSeconds());
|
||||
};
|
||||
|
||||
exports.TimeSeries = TimeSeries;
|
||||
exports.SmoothieChart = SmoothieChart;
|
||||
|
||||
})(typeof exports === 'undefined' ? this : exports);
|
||||
|
||||
Loading…
Reference in New Issue