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gauge.min.js
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/*
HTML5 Canvas Gauge implementation
This code is subject to MIT license.
Copyright (c) 2012 Mykhailo Stadnyk <[email protected]>
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.
@authors: Mykhailo Stadnyk <[email protected]>
Chris Poile <[email protected]>
Luca Invernizzi <http://www.lucainvernizzi.net>
Robert Blackburn <http://www.rwblackburn.com>
*/
var Gauge=function(b){function l(a,b){for(var d in b)"object"==typeof b[d]&&"[object Array]"!==Object.prototype.toString.call(b[d])&&"renderTo"!=d?("object"!=typeof a[d]&&(a[d]={}),l(a[d],b[d])):a[d]=b[d]}function m(){u.width=b.width;u.height=b.height;x=u.cloneNode(!0);y=x.getContext("2d");A=u.width;B=u.height;v=A/2;w=B/2;f=v<w?v:w;x.i8d=!1;y.translate(v,w);y.save();a.translate(v,w);a.save()}function z(a){var b=new Date;C=setInterval(function(){var d=(new Date-b)/a.duration;1<d&&(d=1);var f=("function"==
typeof a.delta?a.delta:I[a.delta])(d);a.step(f);1==d&&clearInterval(C)},a.delay||10)}function q(){C&&clearInterval(C);var a=F-r,h=r,d=b.animation;z({delay:d.delay,duration:d.duration,delta:d.fn,step:function(b){r=parseFloat(h)+a*b;s.draw()}})}function g(a){return a*Math.PI/180}function c(b,h,d){d=a.createLinearGradient(0,0,0,d);d.addColorStop(0,b);d.addColorStop(1,h);return d}function p(a){var h=!1;a=0===b.majorTicksFormat.dec?Math.round(a).toString():a.toFixed(b.majorTicksFormat.dec);return 1<b.majorTicksFormat["int"]?
(h=-1<a.indexOf("."),-1<a.indexOf("-")?"-"+(b.majorTicksFormat["int"]+b.majorTicksFormat.dec+2+(h?1:0)-a.length)+a.replace("-",""):""+(b.majorTicksFormat["int"]+b.majorTicksFormat.dec+1+(h?1:0)-a.length)+a):a}function t(a){var h=b.valueFormat.dec,d=b.valueFormat["int"];a=parseFloat(a);var f=0>a;a=Math.abs(a);if(0<h){a=a.toFixed(h).toString().split(".");h=0;for(d-=a[0].length;h<d;++h)a[0]="0"+a[0];a=(f?"-":"")+a[0]+"."+a[1]}else{a=Math.round(a).toString();h=0;for(d-=a.length;h<d;++h)a="0"+a;a=(f?"-":
"")+a}return a}function e(a,b){var d=Math.sin(b),f=Math.cos(b);return{x:0*f-a*d,y:0*d+a*f}}function D(){var e=12*(f/100),h=8*(f/100),d=77*(f/100),k=20*(f/100),G=4*(f/100),E=2*(f/100),p=function(){a.shadowOffsetX=2;a.shadowOffsetY=2;a.shadowBlur=10;a.shadowColor="rgba(188, 143, 143, 0.45)"};p();a.save();r=0>r?Math.abs(b.minValue-r):0<b.minValue?r-b.minValue:Math.abs(b.minValue)+r;a.rotate(g(45+r/((b.maxValue-b.minValue)/270)));a.beginPath();a.moveTo(-E,-k);a.lineTo(-G,0);a.lineTo(-1,d);a.lineTo(1,
d);a.lineTo(G,0);a.lineTo(E,-k);a.closePath();a.fillStyle=c(b.colors.needle.start,b.colors.needle.end,d-k);a.fill();a.beginPath();a.lineTo(-0.5,d);a.lineTo(-1,d);a.lineTo(-G,0);a.lineTo(-E,-k);a.lineTo(E/2-2,-k);a.closePath();a.fillStyle="rgba(255, 255, 255, 0.2)";a.fill();a.restore();p();a.beginPath();a.arc(0,0,e,0,2*Math.PI,!0);a.fillStyle=c("#f0f0f0","#ccc",e);a.fill();a.restore();a.beginPath();a.arc(0,0,h,0,2*Math.PI,!0);a.fillStyle=c("#e8e8e8","#f5f5f5",h);a.fill()}Gauge.Collection.push(this);
this.config={renderTo:null,width:200,height:200,title:!1,maxValue:100,minValue:0,majorTicks:[],minorTicks:10,strokeTicks:!0,units:!1,valueFormat:{"int":3,dec:2},majorTicksFormat:{"int":1,dec:0},glow:!0,animation:{delay:10,duration:250,fn:"cycle"},colors:{plate:"#fff",majorTicks:"#444",minorTicks:"#666",title:"#888",units:"#888",numbers:"#444",needle:{start:"rgba(240, 128, 128, 1)",end:"rgba(255, 160, 122, .9)"}},highlights:[{from:20,to:60,color:"#eee"},{from:60,to:80,color:"#ccc"},{from:80,to:100,
color:"#999"}]};var n=0,s=this,r=0,F=0,H=!1;this.setValue=function(a){r=b.animation?n:a;var f=(b.maxValue-b.minValue)/100;F=a>b.maxValue?b.maxValue+f:a<b.minValue?b.minValue-f:a;n=a;b.animation?q():this.draw();return this};this.setRawValue=function(a){r=n=a;this.draw();return this};this.clear=function(){n=r=F=this.config.minValue;this.draw();return this};this.getValue=function(){return n};this.onready=function(){};l(this.config,b);this.config.minValue=parseFloat(this.config.minValue);this.config.maxValue=
parseFloat(this.config.maxValue);b=this.config;r=n=b.minValue;if(!b.renderTo)throw Error("Canvas element was not specified when creating the Gauge object!");var u=b.renderTo.tagName?b.renderTo:document.getElementById(b.renderTo),a=u.getContext("2d"),x,A,B,v,w,f,y;m();this.updateConfig=function(a){l(this.config,a);m();this.draw();return this};var I={linear:function(a){return a},quad:function(a){return Math.pow(a,2)},quint:function(a){return Math.pow(a,5)},cycle:function(a){return 1-Math.sin(Math.acos(a))},
bounce:function(a){a:{a=1-a;for(var b=0,d=1;;b+=d,d/=2)if(a>=(7-4*b)/11){a=-Math.pow((11-6*b-11*a)/4,2)+Math.pow(d,2);break a}a=void 0}return 1-a},elastic:function(a){a=1-a;return 1-Math.pow(2,10*(a-1))*Math.cos(30*Math.PI/3*a)}},C=null;a.lineCap="round";this.isWaitingForInitialization=!1;this.drawWhenInitialized=function(){if(!Gauge.initialized)return this.isWaitingForInitialization=!0,!1;this.isWaitingForInitialization=!1;a.save();a.font=40*(f/200)+"px Led";var b=t(n),h=a.measureText("-"+t(0)).width,
d=f-33*(f/100),e=0.12*f;a.save();var c=-h/2-0.025*f,g=d-e-0.04*f,h=h+0.05*f,e=e+0.07*f,p=0.025*f;a.beginPath();a.moveTo(c+p,g);a.lineTo(c+h-p,g);a.quadraticCurveTo(c+h,g,c+h,g+p);a.lineTo(c+h,g+e-p);a.quadraticCurveTo(c+h,g+e,c+h-p,g+e);a.lineTo(c+p,g+e);a.quadraticCurveTo(c,g+e,c,g+e-p);a.lineTo(c,g+p);a.quadraticCurveTo(c,g,c+p,g);a.closePath();c=a.createRadialGradient(0,d-0.12*f-0.025*f+(0.12*f+0.045*f)/2,f/10,0,d-0.12*f-0.025*f+(0.12*f+0.045*f)/2,f/5);c.addColorStop(0,"#888");c.addColorStop(1,
"#666");a.strokeStyle=c;a.lineWidth=0.05*f;a.stroke();a.shadowBlur=0.012*f;a.shadowColor="rgba(0, 0, 0, 1)";a.fillStyle="#babab2";a.fill();a.restore();a.shadowOffsetX=0.004*f;a.shadowOffsetY=0.004*f;a.shadowBlur=0.012*f;a.shadowColor="rgba(0, 0, 0, 0.3)";a.fillStyle="#444";a.textAlign="center";a.fillText(b,-0,d);a.restore();D();H||(s.onready&&s.onready(),H=!0);return!0};this.draw=function(){if(!x.i8d){y.clearRect(-v,-w,A,B);y.save();var r={ctx:a};a=y;var h=93*(f/100),d=f-h,k=91*(f/100),n=88*(f/100),
m=85*(f/100);a.save();b.glow&&(a.shadowBlur=d,a.shadowColor="rgba(0, 0, 0, 0.5)");a.beginPath();a.arc(0,0,h,0,2*Math.PI,!0);a.fillStyle=c("#ddd","#aaa",h);a.fill();a.restore();a.beginPath();a.arc(0,0,k,0,2*Math.PI,!0);a.fillStyle=c("#fafafa","#ccc",k);a.fill();a.beginPath();a.arc(0,0,n,0,2*Math.PI,!0);a.fillStyle=c("#eee","#f0f0f0",n);a.fill();a.beginPath();a.arc(0,0,m,0,2*Math.PI,!0);a.fillStyle=b.colors.plate;a.fill();a.save();a.save();h=81*(f/100);d=h-15*(f/100);k=0;for(n=b.highlights.length;k<
n;k++){var m=b.highlights[k],s=(b.maxValue-b.minValue)/270,l=g(45+(m.from-b.minValue)/s),s=g(45+(m.to-b.minValue)/s);a.beginPath();a.rotate(g(90));a.arc(0,0,h,l,s,!1);a.restore();a.save();var q=e(d,l),t=e(h,l);a.moveTo(q.x,q.y);a.lineTo(t.x,t.y);var t=e(h,s),u=e(d,s);a.lineTo(t.x,t.y);a.lineTo(u.x,u.y);a.lineTo(q.x,q.y);a.closePath();a.fillStyle=m.color;a.fill();a.beginPath();a.rotate(g(90));a.arc(0,0,d,l-0.2,s+0.2,!1);a.restore();a.closePath();a.fillStyle=b.colors.plate;a.fill();a.save()}h=81*(f/
100);a.lineWidth=1;a.strokeStyle=b.colors.minorTicks;a.save();d=b.minorTicks*(b.majorTicks.length-1);for(k=0;k<d;++k)a.rotate(g(45+k*(270/d))),a.beginPath(),a.moveTo(0,h),a.lineTo(0,h-7.5*(f/100)),a.stroke(),a.restore(),a.save();h=81*(f/100);a.lineWidth=2;a.strokeStyle=b.colors.majorTicks;a.save();if(0===b.majorTicks.length){d=(b.maxValue-b.minValue)/5;for(k=0;5>k;k++)b.majorTicks.push(p(b.minValue+d*k));b.majorTicks.push(p(b.maxValue))}for(k=0;k<b.majorTicks.length;++k)a.rotate(g(45+k*(270/(b.majorTicks.length-
1)))),a.beginPath(),a.moveTo(0,h),a.lineTo(0,h-15*(f/100)),a.stroke(),a.restore(),a.save();b.strokeTicks&&(a.rotate(g(90)),a.beginPath(),a.arc(0,0,h,g(45),g(315),!1),a.stroke(),a.restore(),a.save());h=55*(f/100);for(d=0;d<b.majorTicks.length;++d)k=e(h,g(45+d*(270/(b.majorTicks.length-1)))),a.font=20*(f/200)+"px Arial",a.fillStyle=b.colors.numbers,a.lineWidth=0,a.textAlign="center",a.fillText(b.majorTicks[d],k.x,k.y+3);b.title&&(a.save(),a.font=24*(f/200)+"px Arial",a.fillStyle=b.colors.title,a.textAlign=
"center",a.fillText(b.title,0,-f/4.25),a.restore());b.units&&(a.save(),a.font=22*(f/200)+"px Arial",a.fillStyle=b.colors.units,a.textAlign="center",a.fillText(b.units,0,f/3.25),a.restore());x.i8d=!0;a=r.ctx;delete r.ctx}a.clearRect(-v,-w,A,B);a.save();a.drawImage(x,-v,-w,A,B);this.drawWhenInitialized()}};Gauge.initialized=!1;
(function(){function b(){Gauge.initialized=!0;for(var b=0;b<Gauge.Collection.length;++b)Gauge.Collection[b].isWaitingForInitialization&&Gauge.Collection[b].drawWhenInitialized()}function l(){var c=m.getElementsByTagName("head")[0],l="@font-face { font-family: '"+g+"'; src: "+q+"; }",e=m.createElement("style");e.type="text/css";if(z)c.appendChild(e),c=e.styleSheet,c.cssText=l;else{try{e.appendChild(m.createTextNode(l))}catch(D){e.cssText=l}c.appendChild(e);c=e.styleSheet?e.styleSheet:e.sheet||m.styleSheets[m.styleSheets.length-
1]}var n=setInterval(function(){if(m.body){clearInterval(n);var c=m.createElement("div");c.style.fontFamily=g;c.style.position="absolute";c.style.height=c.style.width=0;c.style.overflow="hidden";c.innerHTML=".";m.body.appendChild(c);setTimeout(function(){b();c.parentNode.removeChild(c)},250)}},1)}var m=document,z=-1!=navigator.userAgent.toLocaleLowerCase().indexOf("msie"),q="url('fonts/digital-7-mono."+(z?"eot":"ttf")+"')",g="Led";if(void 0===document.fonts)l();else{var c=new window.FontFace(g,q);
document.fonts.add(c);c.load().then(function(c){b()},function(b){window.console&&window.console.log(b);l()})}})();Gauge.Collection=[];Gauge.Collection.get=function(b){if("string"==typeof b)for(var l=0,m=this.length;l<m;l++){if((this[l].config.renderTo.tagName?this[l].config.renderTo:document.getElementById(this[l].config.renderTo)).getAttribute("id")==b)return this[l]}else return"number"==typeof b?this[b]:null};
function domReady(b){window.addEventListener?window.addEventListener("DOMContentLoaded",b,!1):window.attachEvent("onload",b)}
domReady(function(){function b(b){for(var c=b[0],e=1,g=b.length;e<g;e++)c+=b[e].substr(0,1).toUpperCase()+b[e].substr(1,b[e].length-1);return c}for(var l=document.getElementsByTagName("canvas"),m=0,z=l.length;m<z;m++)if("canv-gauge"==l[m].getAttribute("data-type")){var q=l[m],g={},c,p=parseInt(q.getAttribute("width"),10),t=parseInt(q.getAttribute("height"),10);g.renderTo=q;p&&(g.width=p);t&&(g.height=t);p=0;for(t=q.attributes.length;p<t;p++)if(c=q.attributes.item(p).nodeName,"data-type"!=c&&"data-"==
c.substr(0,5)){var e=c.substr(5,c.length-5).toLowerCase().split("-");if(c=q.getAttribute(c))switch(e[0]){case "colors":e[1]&&(g.colors||(g.colors={}),"needle"==e[1]?(e=c.split(/\s+/),g.colors.needle=e[0]&&e[1]?{start:e[0],end:e[1]}:c):(e.shift(),g.colors[b(e)]=c));break;case "highlights":g.highlights||(g.highlights=[]);c=c.match(/(?:(?:-?\d*\.)?(-?\d+){1,2} ){2}(?:(?:#|0x)?(?:[0-9A-F|a-f]){3,8}|rgba?\(.*?\))/g);for(var e=0,D=c.length;e<D;e++){var n=c[e].replace(/^\s+|\s+$/g,"").split(/\s+/),s={};
n[0]&&""!=n[0]&&(s.from=n[0]);n[1]&&""!=n[1]&&(s.to=n[1]);n[2]&&""!=n[2]&&(s.color=n[2]);g.highlights.push(s)}break;case "animation":e[1]&&(g.animation||(g.animation={}),"fn"==e[1]&&/^\s*function\s*\(/.test(c)&&(c=eval("("+c+")")),g.animation[e[1]]=c);break;default:e=b(e);if("onready"==e)continue;if("majorTicks"==e)c=c.split(/\s+/);else if("strokeTicks"==e||"glow"==e)c="true"==c?!0:!1;else if("valueFormat"==e)if(c=c.split("."),2==c.length)c={"int":parseInt(c[0],10),dec:parseInt(c[1],10)};else continue;
g[e]=c}}g=new Gauge(g);q.getAttribute("data-value")&&g.setRawValue(parseFloat(q.getAttribute("data-value")));q.getAttribute("data-onready")&&(g.onready=function(){eval(this.config.renderTo.getAttribute("data-onready"))});g.draw()}});window.Gauge=Gauge;