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/* |
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The MIT License (MIT) |
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|
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Copyright (c) 2014 Valerio Neri |
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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 |
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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 all |
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copies or substantial portions of the Software. |
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*/ |
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|
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|
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var donutChart = function(chartElementID){ |
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var centerx = 0; |
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var centery = 0; |
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var sizex = 0; |
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var sizey = 0; |
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var scaling = 0; |
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var radius = 0; |
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var startx = 0; |
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var starty = 0; |
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var endx = 0; |
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var endy = 0; |
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var animationSpeed = 1; |
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var firedAnimation = false; |
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var innerCircleColor = "#666666"; |
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var outerCircleColor = "#aade87"; |
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var textColor = "#ffffff"; |
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var unitText = "%"; |
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var innerCircleDOM = undefined; |
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var outerCircleDOM = undefined; |
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var tNumberDOM = undefined; |
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var textDOM = undefined; |
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var tUnitDOM = undefined; |
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var titleDOM = undefined; |
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var svg = undefined; |
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var chartID = chartElementID; |
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var chart = undefined; |
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var lastValue = -1; |
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var startValue = 0; |
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var endValue = 0; |
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var loaded = false; |
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var that=this; |
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var maxValue = 100; |
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var titleText =""; |
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var titlePosition = "top"; |
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var titleColor = "#ffffff"; |
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var textShift = 20; // this is required for moving the chart |
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var textScaling = 1; |
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|
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// update: unfortunately in some cases the event is fired, and nobody tells us - that's why we just wait for the element to be available |
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// wait for the DOM, otherwise you won't find the reference to elements |
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//document.addEventListener("DOMContentLoaded", onLoad); |
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onLoad(); |
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|
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// this is used for refreshing the animation |
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(function() { |
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var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || |
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window.webkitRequestAnimationFrame || window.msRequestAnimationFrame; |
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window.requestAnimationFrame = requestAnimationFrame; |
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})(); |
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|
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this.getValue = function(){ |
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if (lastValue>-1) |
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return Math.round(lastValue/360*maxValue*10)/10; |
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else |
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return 0; |
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} |
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|
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this.setValue = function(value){ |
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that.draw({end:value, animationSpeed:0}); |
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} |
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|
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function setAnimate(fromD, toD, duration){ |
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dAct = fromD; |
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// determine direction (up or down) |
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if (dAct<toD) |
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doIt(dAct, toD, duration, "up"); |
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else |
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doIt(dAct, toD, duration, "down"); |
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} |
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|
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// this function is used for the animation - it uses an exponential acceleration |
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function calculateAccValue(xx, m){ |
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var mxValue = m; |
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var x=Math.round(xx); |
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if (m==0){ |
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mxValue=1; |
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} |
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if (x==0){ |
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x=1; |
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} |
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if (Math.abs(x)>=mxValue){ |
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return mxValue; |
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}else{ |
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//return ( Math.pow( (-2),( (-1*x) + (Math.log(maxValue)/Math.log(2)) ) ) + maxValue); |
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var num1 = -2; |
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var num2 = Math.round( ((-1*x)+(Math.log(mxValue)/Math.log(2))) ); |
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return Math.pow(num1 , num2 )+mxValue; |
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} |
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} |
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|
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function textSetter(DOM, text){ |
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// text scaling |
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if ((text>=1000)&&(textScaling=1)){ |
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textScaling=1-((Math.floor( (Math.log(text)/Math.log(10))-2))/10)-0.1; |
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tNumberDOM.setAttribute('font-size', 50*scaling*textScaling); |
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tUnitDOM.setAttribute('font-size', 30*scaling*textScaling); |
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} else{ |
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textScaling = 1; |
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tNumberDOM.setAttribute('font-size', 50*scaling*textScaling); |
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tUnitDOM.setAttribute('font-size', 30*scaling*textScaling); |
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} |
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DOM.textContent = text; |
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} |
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|
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function doIt(dAct, toD, duration, direction){ |
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var toString = ""; |
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// -0.0001 is used for preventing IE reach 360 and close the circle |
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toString = getD(dAct-0.0001); |
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outerCircleDOM.setAttribute('d',toString); |
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|
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//force the value to be an integer |
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var anim_cur_val = Math.round(dAct/360*maxValue*10)/10; |
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//textSetter(tNumberDOM, Math.round(dAct/360*maxValue*10)/10); |
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textSetter(tNumberDOM, anim_cur_val.toFixed(0)); |
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|
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//console.log('dAct '+dAct+ ' toD'+toD); |
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// determine direction (up or down) |
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if (direction=="up") |
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dAct = dAct + 5.5; |
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else |
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dAct = dAct - 5.5; |
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|
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duration = duration - calculateAccValue(duration, 500); |
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if (direction=="up"){ |
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if (dAct < toD){ |
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setTimeout(function(){ |
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// animate it according to refresh rate |
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requestAnimationFrame(function(){ |
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doIt(dAct, toD, duration, direction); |
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}) |
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},duration); |
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} else { |
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|
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outerCircleDOM.setAttribute('d',getD((toD-0.0001))); |
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textSetter(tNumberDOM, Math.round(toD/360*maxValue*10)/10); |
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} |
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} else { |
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if (dAct >= toD){ |
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setTimeout(function(){ |
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// animate it according to refresh rate |
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requestAnimationFrame(function(){ |
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doIt(dAct, toD, duration, direction); |
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}) |
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},duration); |
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} else { |
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outerCircleDOM.setAttribute('d',getD(toD-0.0001)); |
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textSetter(tNumberDOM ,Math.round(toD/360*maxValue*10)/10); |
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} |
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} |
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|
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}; |
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|
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// this function gives us the circle coordinates |
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function getCoordinates(radius,offset,degrees){ |
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var radians = degreesToRadians(degrees); |
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var x = offset.x + radius * Math.cos(radians) |
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var y = offset.y + radius * Math.sin(radians) |
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return {x:x,y:y}; |
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}; |
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|
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// small converstion beween degrees and radians |
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function degreesToRadians(degrees){ |
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var radians = (degrees * Math.PI) / 180; |
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return radians |
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}; |
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|
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// this function returns the "d" string for the path, according to the degrees |
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function getD(degree){ |
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radius = 100*scaling; |
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startx = centerx+radius; |
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starty = centery; |
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var coor = getCoordinates(radius, {x:startx,y:starty},degree); |
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endx = coor.x; |
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endy = coor.y; |
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var largearc = 0; |
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if (degree>180){ |
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largearc=1; |
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} else { |
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largearc=0; |
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} |
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// don't ask me how I did it folks |
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d="M "+startx+" "+starty+" a "+radius+" "+radius+" 0 "+largearc+" 1 "+(endx-startx-radius)+" "+(endy-starty)+" L "+(centerx)+" "+(centery)+" Z"; |
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//console.log('GETd '+degree+ " "+d); |
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return d; |
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} |
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|
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// this function checks, if an element is fully visible (according to the scrolling) |
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function checkVisible(){ |
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if (firedAnimation){ |
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// animation has already fired, detach the event listeners |
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document.removeEventListener("scroll", checkVisible, false); |
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window.removeEventListener("resize", checkVisible, false); |
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return; |
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} |
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var rect = chart.getBoundingClientRect(); |
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var top = window.pageYOffset || document.documentElement.scrollTop; |
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var left = window.pageXOffset || document.documentElement.scrollLeft; |
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if ((rect.top>=0)&&(rect.top+rect.height<window.innerHeight) && |
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(rect.left>=0)&&(rect.left+rect.width<window.innerWidth)){ |
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// this means that we fully see the chart |
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// fire the animation (only once) |
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firedAnimation = true; |
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setAnimate(startValue, endValue, (500/animationSpeed)); |
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} |
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} |
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|
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var waitingLoad =0; |
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|
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function onLoad(){ |
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// get the container for the chart |
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chart = document.getElementById(chartID); |
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|
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// if the container is not ready in the DOM, then retry |
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// try for around 20secs, then throw an exception |
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if (chart==null){ |
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|
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// after 10 seconds, pause a little bit |
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if ((waitingLoad > 10000)&&(waitingLoad<20000)){ |
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setTimeout(onLoad, 1000); |
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waitingLoad = waitingLoad +1000; |
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return; |
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} |
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if (waitingLoad > 20000){ |
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throw('donutChart: onLoad() - The chart element "'+chartID+'" could not be loaded in the last 20 seconds'); |
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} |
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setTimeout(onLoad, 500); |
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waitingLoad = waitingLoad +500; |
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return; |
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} |
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// create an svg object and all other things - thanks to Thoka |
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svg = document.createElementNS('http://www.w3.org/2000/svg','svg'); |
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innerCircleDOM = document.createElementNS('http://www.w3.org/2000/svg','circle'); |
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outerCircleDOM = document.createElementNS('http://www.w3.org/2000/svg','path'); |
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textDOM = document.createElementNS('http://www.w3.org/2000/svg','text'); |
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tNumberDOM = document.createElementNS('http://www.w3.org/2000/svg','tspan'); |
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tUnitDOM = document.createElementNS('http://www.w3.org/2000/svg','tspan'); |
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titleDOM = document.createElementNS('http://www.w3.org/2000/svg','text'); |
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|
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// append to the chart |
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chart.appendChild(svg); |
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svg.appendChild(outerCircleDOM); |
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svg.appendChild(innerCircleDOM); |
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svg.appendChild(textDOM); |
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svg.appendChild(titleDOM); |
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|
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textDOM.appendChild(tNumberDOM); |
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textDOM.appendChild(tUnitDOM); |
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loaded = true; |
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} |
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|
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this.reload = function(){ |
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if (!loaded) |
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onLoad(); |
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} |
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|
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this.clear = function(){ |
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// reinitialize some parameters |
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firedAnimation = false; |
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animationSpeed = 1; |
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maxValue = 100; |
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unitText = "%"; |
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lastValue = -1; |
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this.setValue(0); |
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} |
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|
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this.delete = function(){ |
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// remove everything |
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this.clear(); |
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textDOM.removeChild(tNumberDOM); |
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textDOM.removeChild(tUnitDOM); |
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svg.removeChild(textDOM); |
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svg.removeChild(titleDOM); |
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svg.removeChild(outerCircleDOM); |
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svg.removeChild(innerCircleDOM); |
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chart.removeChild(svg); |
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loaded = false; |
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// yes but we leave chart, because it was provided |
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} |
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|
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this.draw = function(options){ |
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// check if main function has already loaded, if not, reiterate |
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if (!loaded){ |
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setTimeout(function(){ |
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that.draw(options); |
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}, 500); |
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return; |
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} |
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|
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// OPTION CHECK - contains the options |
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// check if all options are set |
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var oTester = []; |
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oTester.options = typeof(options)!="undefined"; |
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|
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if (! (oTester.options)){ |
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throw('donutChart: draw() - Not enough parameters or no parameters set in object'); |
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return; |
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} |
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|
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oTester.end = typeof(options.end)!="undefined"; |
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oTester.start = typeof(options.start)!="undefined"; |
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oTester.scaling = typeof(options.scaling)!="undefined"; |
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oTester.size = typeof(options.size)!="undefined"; |
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oTester.animationSpeed = typeof(options.animationSpeed)!="undefined"; |
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oTester.textColor = typeof(options.textColor)!="undefined"; |
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oTester.innerCircleColor = typeof(options.innerCircleColor)!="undefined"; |
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oTester.outerCircleColor = typeof(options.outerCircleColor)!="undefined"; |
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oTester.unitText = typeof(options.unitText)!="undefined"; |
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oTester.maxValue = typeof(options.maxValue)!="undefined"; |
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oTester.titleText = typeof(options.titleText)!="undefined"; |
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oTester.titleColor = typeof(options.titleColor)!="undefined"; |
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oTester.titlePosition = typeof(options.titlePosition)!="undefined"; |
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|
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if (! (oTester.end)){ |
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throw('donutChart: draw() - No "end" value specified'); |
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return; |
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} |
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|
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// reinitialize some parameters |
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firedAnimation = false; |
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animationSpeed = 1; |
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maxValue = 100; |
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unitText = "%"; |
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textShift = 20; |
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textScaling = 1; |
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|
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// if the values are not set, set the standard |
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if (!oTester.size){ |
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options.size = 200; |
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} |
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|
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if (!oTester.scaling){ |
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options.scaling = 1; |
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} |
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|
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// if size ist not set, then take the options.scaling and the standard size of 200x200 |
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if (!oTester.size){ |
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svg.setAttribute('width', 200*options.scaling); |
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svg.setAttribute('height', 200*options.scaling); |
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options.size = 200*options.scaling; |
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} |
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// if scaling not set, then take the size anc calculate the options.scaling |
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if (!oTester.scaling){ |
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svg.setAttribute('width', options.size); |
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svg.setAttribute('height', options.size); |
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if (svg.getAttribute('width')<svg.getAttribute('height')){ |
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options.scaling = svg.getAttribute('width') / 200; |
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} else{ |
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options.scaling = svg.getAttribute('height') / 200; |
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} |
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} |
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|
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// set the colors, if set |
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if (oTester.outerCircleColor){ |
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outerCircleColor = options.outerCircleColor; |
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} |
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if (oTester.innerCircleColor){ |
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innerCircleColor = options.innerCircleColor; |
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} |
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if (oTester.textColor){ |
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textColor = options.textColor; |
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} |
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|
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// set the unitText, if set |
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if (oTester.unitText){ |
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unitText = options.unitText; |
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} |
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|
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// set the title, if set |
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if (oTester.titleText){ |
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titleText = options.titleText; |
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} |
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if (oTester.titleColor){ |
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titleColor = options.titleColor; |
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} |
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if (oTester.titlePosition){ |
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titlePosition = options.titlePosition; |
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} |
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|
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|
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// set the maxValue, if set |
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if (oTester.maxValue){ |
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maxValue = options.maxValue; |
| 400 |
} |
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|
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// set the starting position, if set |
| 403 |
if (oTester.start){ |
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options.start = Math.round(parseFloat(options.start)*10)/10; |
| 405 |
if (options.start>maxValue) |
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options.start = maxValue; |
| 407 |
if (options.start<0) |
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options.start = 0; |
| 409 |
if (isNaN(options.start)){ |
| 410 |
// not a number and not parseable, ignore |
| 411 |
options.start = 0; |
| 412 |
oTester.start = false; |
| 413 |
} |
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startValue = options.start/maxValue*360; |
| 415 |
} |
| 416 |
|
| 417 |
options.end = Math.round(parseFloat(options.end)*10)/10; |
| 418 |
|
| 419 |
if (options.end>maxValue) |
| 420 |
options.end = maxValue; |
| 421 |
if (options.end<0) |
| 422 |
options.end = 0; |
| 423 |
|
| 424 |
if (isNaN(options.end)){ |
| 425 |
// not a number and not parseable, ignore |
| 426 |
return; |
| 427 |
} |
| 428 |
|
| 429 |
options.end = options.end/maxValue*360; |
| 430 |
endValue = options.end; |
| 431 |
|
| 432 |
textShift = textShift*options.scaling; |
| 433 |
|
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// set the size and the center |
| 435 |
sizex = options.size; |
| 436 |
sizey = options.size+2*textShift; |
| 437 |
centerx = sizex/2; |
| 438 |
centery = (sizey/2); |
| 439 |
scaling = options.scaling; |
| 440 |
|
| 441 |
// set animation speed (0 = no animation), standard is one |
| 442 |
if(oTester.animationSpeed){ |
| 443 |
animationSpeed = options.animationSpeed; |
| 444 |
} |
| 445 |
|
| 446 |
//e4j |
| 447 |
var innerCircleStroke = typeof(options.innerCircleStroke)!="undefined" ? options.innerCircleStroke : 'none'; |
| 448 |
var outerCircleStroke = typeof(options.outerCircleStroke)!="undefined" ? options.outerCircleStroke : 'none'; |
| 449 |
// |
| 450 |
|
| 451 |
// initialise with start position |
| 452 |
outerCircleDOM.setAttribute('d', getD(startValue)); |
| 453 |
|
| 454 |
chart.style.width = sizex; |
| 455 |
chart.style.height = sizey; |
| 456 |
|
| 457 |
svg.setAttribute('height', sizey); |
| 458 |
svg.setAttribute('class', 'donutChart'); |
| 459 |
svg.setAttribute('xmlns', 'http://www.w3.org/2000/svg'); |
| 460 |
svg.setAttribute('version', '1.1'); |
| 461 |
|
| 462 |
innerCircleDOM.setAttribute('cx', centerx); |
| 463 |
innerCircleDOM.setAttribute('cy', centery); |
| 464 |
innerCircleDOM.setAttribute('r', 80*options.scaling); |
| 465 |
innerCircleDOM.setAttribute('stroke', innerCircleStroke); |
| 466 |
innerCircleDOM.setAttribute('stroke-width', '2'); |
| 467 |
innerCircleDOM.setAttribute('fill', innerCircleColor); |
| 468 |
|
| 469 |
outerCircleDOM.setAttribute('fill', outerCircleColor); |
| 470 |
outerCircleDOM.setAttribute('stroke', outerCircleStroke); |
| 471 |
outerCircleDOM.setAttribute('stroke-width', '36'); |
| 472 |
|
| 473 |
tNumberDOM.setAttribute('x', centerx); |
| 474 |
tNumberDOM.setAttribute('y', centery+Math.round(18.75*options.scaling)); |
| 475 |
tNumberDOM.setAttribute('font-size', 50*options.scaling); |
| 476 |
tNumberDOM.setAttribute('fill', textColor); |
| 477 |
tNumberDOM.setAttribute('font-family', 'arial'); |
| 478 |
tNumberDOM.setAttribute('font-weight', 'normal'); |
| 479 |
tNumberDOM.setAttribute('text-anchor', 'middle'); |
| 480 |
|
| 481 |
tUnitDOM.setAttribute('font-size', 30*options.scaling); |
| 482 |
tUnitDOM.textContent = unitText; |
| 483 |
tUnitDOM.setAttribute('fill', textColor); |
| 484 |
tUnitDOM.setAttribute('text-anchor', 'middle'); |
| 485 |
tUnitDOM.setAttribute('font-family', 'arial'); |
| 486 |
tUnitDOM.setAttribute('font-weight', 'normal'); |
| 487 |
|
| 488 |
titleDOM.setAttribute('x', centerx); |
| 489 |
// set the position of the title |
| 490 |
switch(titlePosition){ |
| 491 |
case "inner-bottom": |
| 492 |
if (!oTester.titleColor) |
| 493 |
titleColor = "#ffffff"; |
| 494 |
titleDOM.setAttribute('y', centery+sizey/5+textShift/2); |
| 495 |
break; |
| 496 |
|
| 497 |
case "outer-bottom": |
| 498 |
if (!oTester.titleColor) |
| 499 |
titleColor = "#666666"; |
| 500 |
|
| 501 |
titleDOM.setAttribute('y', sizey-textShift/2); |
| 502 |
break; |
| 503 |
|
| 504 |
case "inner-top": |
| 505 |
if (!oTester.titleColor) |
| 506 |
titleColor = "#ffffff"; |
| 507 |
titleDOM.setAttribute('y', centery-sizey/5-textShift/2); |
| 508 |
break; |
| 509 |
|
| 510 |
default: |
| 511 |
case "outer-top": |
| 512 |
if (!oTester.titleColor) |
| 513 |
titleColor = "#666666"; |
| 514 |
|
| 515 |
titleDOM.setAttribute('y', textShift/2); |
| 516 |
break; |
| 517 |
} |
| 518 |
|
| 519 |
titleDOM.setAttribute('font-size', 12*options.scaling); |
| 520 |
titleDOM.setAttribute('fill', titleColor); |
| 521 |
titleDOM.setAttribute('font-family', 'arial'); |
| 522 |
titleDOM.setAttribute('font-weight', 'normal'); |
| 523 |
titleDOM.setAttribute('text-anchor', 'middle'); |
| 524 |
titleDOM.textContent = titleText; |
| 525 |
|
| 526 |
|
| 527 |
// if the animation has been chosen |
| 528 |
if (animationSpeed>0){ |
| 529 |
// ignore start value if lastvalue is already set |
| 530 |
if (lastValue>-1){ |
| 531 |
startValue = lastValue; |
| 532 |
} |
| 533 |
window.addEventListener("resize", checkVisible, false); |
| 534 |
document.addEventListener("scroll", checkVisible, false); |
| 535 |
tNumberDOM.textContent = Math.round(startValue/360*maxValue*10)/10; |
| 536 |
checkVisible(); |
| 537 |
} else { |
| 538 |
// set the circle to the end position, without animation |
| 539 |
// the 0.0001 is for avoiding the circle to disappear, due to some browser |
| 540 |
outerCircleDOM.setAttribute('d', getD(options.end-0.0001)); |
| 541 |
tNumberDOM.textContent = Math.round(options.end/360*maxValue*10)/10; |
| 542 |
} |
| 543 |
lastValue = endValue; |
| 544 |
} |
| 545 |
} |
| 546 |
|