msqr · January 23, 2023 05:38
diff --git a/README b/README
 A circular gauge, inspired in part by http://bl.ocks.org/1499279 but with different
 goals in mind. The approach taken here for rotating the pointer is using a rotational
 transformation, which is easier to code and animate than redrawing the pointer line
 as taken in tomerd's gauge.

 This code is released under the MIT license.

 Copyright (C) 2012 Matt Magoffin

 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the
 "Software"), to deal 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:

 The above copyright notice and this permission notice shall be included
 in all copies or substantial portions of the Software.

 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, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/index.html b/index.html
 <!DOCTYPE html>
 <html>
 <head>
    <meta charset="utf-8">
 	<meta name="viewport" content="width=320" />
 	<meta name="apple-mobile-web-app-capable" content="yes" />
 	<title>Gauge</title>
 	<script type="text/javascript" src="http://d3js.org/d3.v2.min.js"></script>
 	<style>
 	body {
 		font-family:  Helvetica, Arial, sans-serif;
 		margin: 32px;
 	}

 	#power-gauge g.arc {
 		fill: steelblue;
 	}

 	#power-gauge g.pointer {
 		fill: #e85116;
 		stroke: #b64011;
 	}
 	
 	#power-gauge g.label text {
 		text-anchor: middle;
 		font-size: 14px;
 		font-weight: bold;
 		fill: #666;
 	}
 	</style>
 </head>
 <body>
 <div id="power-gauge"></div>
 	
 <script>
 var gauge = function(container, configuration) {
 	var that = {};
 	var config = {
 		size						: 200,
 		clipWidth					: 200,
 		clipHeight					: 110,
 		ringInset					: 20,
 		ringWidth					: 20,
 		
 		pointerWidth				: 10,
 		pointerTailLength			: 5,
 		pointerHeadLengthPercent	: 0.9,
 		
 		minValue					: 0,
 		maxValue					: 10,
 		
 		minAngle					: -90,
 		maxAngle					: 90,
 		
 		transitionMs				: 750,
 		
 		majorTicks					: 5,
 		labelFormat					: d3.format(',g'),
 		labelInset					: 10,
 		
 		arcColorFn					: d3.interpolateHsl(d3.rgb('#e8e2ca'), d3.rgb('#3e6c0a'))
 	};
 	var range = undefined;
 	var r = undefined;
 	var pointerHeadLength = undefined;
 	var value = 0;
 	
 	var svg = undefined;
 	var arc = undefined;
 	var scale = undefined;
 	var ticks = undefined;
 	var tickData = undefined;
 	var pointer = undefined;

 	var donut = d3.layout.pie();
 	
 	function deg2rad(deg) {
 		return deg * Math.PI / 180;
 	}
 	
 	function newAngle(d) {
 		var ratio = scale(d);
 		var newAngle = config.minAngle + (ratio * range);
 		return newAngle;
 	}
 	
 	function configure(configuration) {
 		var prop = undefined;
 		for ( prop in configuration ) {
 			config[prop] = configuration[prop];
 		}
 		
 		range = config.maxAngle - config.minAngle;
 		r = config.size / 2;
 		pointerHeadLength = Math.round(r * config.pointerHeadLengthPercent);

 		// a linear scale that maps domain values to a percent from 0..1
 		scale = d3.scale.linear()
 			.range([0,1])
 			.domain([config.minValue, config.maxValue]);
 			
 		ticks = scale.ticks(config.majorTicks);
 		tickData = d3.range(config.majorTicks).map(function() {return 1/config.majorTicks;});
 		
 		arc = d3.svg.arc()
 			.innerRadius(r - config.ringWidth - config.ringInset)
 			.outerRadius(r - config.ringInset)
 			.startAngle(function(d, i) {
 				var ratio = d * i;
 				return deg2rad(config.minAngle + (ratio * range));
 			})
 			.endAngle(function(d, i) {
 				var ratio = d * (i+1);
 				return deg2rad(config.minAngle + (ratio * range));
 			});
 	}
 	that.configure = configure;
 	
 	function centerTranslation() {
 		return 'translate('+r +','+ r +')';
 	}
 	
 	function isRendered() {
 		return (svg !== undefined);
 	}
 	that.isRendered = isRendered;
 	
 	function render(newValue) {
 		svg = d3.select(container)
 			.append('svg:svg')
 				.attr('class', 'gauge')
 				.attr('width', config.clipWidth)
 				.attr('height', config.clipHeight);
 		
 		var centerTx = centerTranslation();
 		
 		var arcs = svg.append('g')
 				.attr('class', 'arc')
 				.attr('transform', centerTx);
 		
 		arcs.selectAll('path')
 				.data(tickData)
 			.enter().append('path')
 				.attr('fill', function(d, i) {
 					return config.arcColorFn(d * i);
 				})
 				.attr('d', arc);
 		
 		var lg = svg.append('g')
 				.attr('class', 'label')
 				.attr('transform', centerTx);
 		lg.selectAll('text')
 				.data(ticks)
 			.enter().append('text')
 				.attr('transform', function(d) {
 					var ratio = scale(d);
 					var newAngle = config.minAngle + (ratio * range);
 					return 'rotate(' +newAngle +') translate(0,' +(config.labelInset - r) +')';
 				})
 				.text(config.labelFormat);

 		var lineData = [ [config.pointerWidth / 2, 0], 
 						[0, -pointerHeadLength],
 						[-(config.pointerWidth / 2), 0],
 						[0, config.pointerTailLength],
 						[config.pointerWidth / 2, 0] ];
 		var pointerLine = d3.svg.line().interpolate('monotone');
 		var pg = svg.append('g').data([lineData])
 				.attr('class', 'pointer')
 				.attr('transform', centerTx);
 				
 		pointer = pg.append('path')
 			.attr('d', pointerLine/*function(d) { return pointerLine(d) +'Z';}*/ )
 			.attr('transform', 'rotate(' +config.minAngle +')');
 			
 		update(newValue === undefined ? 0 : newValue);
 	}
 	that.render = render;
 	
 	function update(newValue, newConfiguration) {
 		if ( newConfiguration  !== undefined) {
 			configure(newConfiguration);
 		}
 		var ratio = scale(newValue);
 		var newAngle = config.minAngle + (ratio * range);
 		pointer.transition()
 			.duration(config.transitionMs)
 			.ease('elastic')
 			.attr('transform', 'rotate(' +newAngle +')');
 	}
 	that.update = update;

 	configure(configuration);
 	
 	return that;
 };
 </script>

 <script>
 function onDocumentReady() {
 	var powerGauge = gauge('#power-gauge', {
 		size: 300,
 		clipWidth: 300,
 		clipHeight: 300,
 		ringWidth: 60,
 		maxValue: 10,
 		transitionMs: 4000,
 	});
 	powerGauge.render();
 	
 	function updateReadings() {
 		// just pump in random data here...
 		powerGauge.update(Math.random() * 10);
 	}
 	
 	// every few seconds update reading values
 	updateReadings();
 	setInterval(function() {
 		updateReadings();
 	}, 5 * 1000);
 }

 if ( !window.isLoaded ) {
 	window.addEventListener("load", function() {
 		onDocumentReady();
 	}, false);
 } else {
 	onDocumentReady();
 }
 </script>
 </body>
 </html>
diff --git a/LICENSE b/LICENSE
 This code is released under the MIT license.

 Copyright (C) 2012 Matt Magoffin

 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the
 "Software"), to deal 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:

 The above copyright notice and this permission notice shall be included
 in all copies or substantial portions of the Software.

 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, OUT OF OR IN CONNECTION WITH THE
 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	A circular gauge, inspired in part by http://bl.ocks.org/1499279 but with different
	goals in mind. The approach taken here for rotating the pointer is using a rotational
	transformation, which is easier to code and animate than redrawing the pointer line
	as taken in tomerd's gauge.

	This code is released under the MIT license.

	Copyright (C) 2012 Matt Magoffin

	Permission is hereby granted, free of charge, to any person obtaining a
	copy of this software and associated documentation files (the
	"Software"), to deal 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:

	The above copyright notice and this permission notice shall be included
	in all copies or substantial portions of the Software.

	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, OUT OF OR IN CONNECTION WITH THE
	SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=320" />
	<meta name="apple-mobile-web-app-capable" content="yes" />
	<title>Gauge</title>
	<script type="text/javascript" src="http://d3js.org/d3.v2.min.js"></script>
	<style>
	body {
	font-family: Helvetica, Arial, sans-serif;
	margin: 32px;
	}

	#power-gauge g.arc {
	fill: steelblue;
	}

	#power-gauge g.pointer {
	fill: #e85116;
	stroke: #b64011;
	}

	#power-gauge g.label text {
	text-anchor: middle;
	font-size: 14px;
	font-weight: bold;
	fill: #666;
	}
	</style>
	</head>
	<body>
	<div id="power-gauge"></div>

	<script>
	var gauge = function(container, configuration) {
	var that = {};
	var config = {
	size : 200,
	clipWidth : 200,
	clipHeight : 110,
	ringInset : 20,
	ringWidth : 20,

	pointerWidth : 10,
	pointerTailLength : 5,
	pointerHeadLengthPercent : 0.9,

	minValue : 0,
	maxValue : 10,

	minAngle : -90,
	maxAngle : 90,

	transitionMs : 750,

	majorTicks : 5,
	labelFormat : d3.format(',g'),
	labelInset : 10,

	arcColorFn : d3.interpolateHsl(d3.rgb('#e8e2ca'), d3.rgb('#3e6c0a'))
	};
	var range = undefined;
	var r = undefined;
	var pointerHeadLength = undefined;
	var value = 0;

	var svg = undefined;
	var arc = undefined;
	var scale = undefined;
	var ticks = undefined;
	var tickData = undefined;
	var pointer = undefined;

	var donut = d3.layout.pie();

	function deg2rad(deg) {
	return deg * Math.PI / 180;
	}

	function newAngle(d) {
	var ratio = scale(d);
	var newAngle = config.minAngle + (ratio * range);
	return newAngle;
	}

	function configure(configuration) {
	var prop = undefined;
	for ( prop in configuration ) {
	config[prop] = configuration[prop];
	}

	range = config.maxAngle - config.minAngle;
	r = config.size / 2;
	pointerHeadLength = Math.round(r * config.pointerHeadLengthPercent);

	// a linear scale that maps domain values to a percent from 0..1
	scale = d3.scale.linear()
	.range([0,1])
	.domain([config.minValue, config.maxValue]);

	ticks = scale.ticks(config.majorTicks);
	tickData = d3.range(config.majorTicks).map(function() {return 1/config.majorTicks;});

	arc = d3.svg.arc()
	.innerRadius(r - config.ringWidth - config.ringInset)
	.outerRadius(r - config.ringInset)
	.startAngle(function(d, i) {
	var ratio = d * i;
	return deg2rad(config.minAngle + (ratio * range));
	})
	.endAngle(function(d, i) {
	var ratio = d * (i+1);
	return deg2rad(config.minAngle + (ratio * range));
	});
	}
	that.configure = configure;

	function centerTranslation() {
	return 'translate('+r +','+ r +')';
	}

	function isRendered() {
	return (svg !== undefined);
	}
	that.isRendered = isRendered;

	function render(newValue) {
	svg = d3.select(container)
	.append('svg:svg')
	.attr('class', 'gauge')
	.attr('width', config.clipWidth)
	.attr('height', config.clipHeight);

	var centerTx = centerTranslation();

	var arcs = svg.append('g')
	.attr('class', 'arc')
	.attr('transform', centerTx);

	arcs.selectAll('path')
	.data(tickData)
	.enter().append('path')
	.attr('fill', function(d, i) {
	return config.arcColorFn(d * i);
	})
	.attr('d', arc);

	var lg = svg.append('g')
	.attr('class', 'label')
	.attr('transform', centerTx);
	lg.selectAll('text')
	.data(ticks)
	.enter().append('text')
	.attr('transform', function(d) {
	var ratio = scale(d);
	var newAngle = config.minAngle + (ratio * range);
	return 'rotate(' +newAngle +') translate(0,' +(config.labelInset - r) +')';
	})
	.text(config.labelFormat);

	var lineData = [ [config.pointerWidth / 2, 0],
	[0, -pointerHeadLength],
	[-(config.pointerWidth / 2), 0],
	[0, config.pointerTailLength],
	[config.pointerWidth / 2, 0] ];
	var pointerLine = d3.svg.line().interpolate('monotone');
	var pg = svg.append('g').data([lineData])
	.attr('class', 'pointer')
	.attr('transform', centerTx);

	pointer = pg.append('path')
	.attr('d', pointerLine/function(d) { return pointerLine(d) +'Z';}/ )
	.attr('transform', 'rotate(' +config.minAngle +')');

	update(newValue === undefined ? 0 : newValue);
	}
	that.render = render;

	function update(newValue, newConfiguration) {
	if ( newConfiguration !== undefined) {
	configure(newConfiguration);
	}
	var ratio = scale(newValue);
	var newAngle = config.minAngle + (ratio * range);
	pointer.transition()
	.duration(config.transitionMs)
	.ease('elastic')
	.attr('transform', 'rotate(' +newAngle +')');
	}
	that.update = update;

	configure(configuration);

	return that;
	};
	</script>

	<script>
	function onDocumentReady() {
	var powerGauge = gauge('#power-gauge', {
	size: 300,
	clipWidth: 300,
	clipHeight: 300,
	ringWidth: 60,
	maxValue: 10,
	transitionMs: 4000,
	});
	powerGauge.render();

	function updateReadings() {
	// just pump in random data here...
	powerGauge.update(Math.random() * 10);
	}

	// every few seconds update reading values
	updateReadings();
	setInterval(function() {
	updateReadings();
	}, 5 * 1000);
	}

	if ( !window.isLoaded ) {
	window.addEventListener("load", function() {
	onDocumentReady();
	}, false);
	} else {
	onDocumentReady();
	}
	</script>
	</body>
	</html>