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222 lines
8.4 KiB
222 lines
8.4 KiB
;(function($, undefined) {
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$.fn.drawPieChart = function(data, options) {
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var $this = this,
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W = $this.width(),
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H = $this.height(),
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centerX = W/2,
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centerY = H/2,
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cos = Math.cos,
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sin = Math.sin,
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PI = Math.PI,
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settings = $.extend({
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segmentShowStroke : true,
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segmentStrokeColor : "#fff",
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segmentStrokeWidth : 1,
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baseColor: "#fff",
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baseOffset: 15,
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edgeOffset: 30,//offset from edge of $this
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pieSegmentGroupClass: "pieSegmentGroup",
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pieSegmentClass: "pieSegment",
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lightPiesOffset: 12,//lighten pie's width
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lightPiesOpacity: .3,//lighten pie's default opacity
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lightPieClass: "lightPie",
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animation : true,
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animationSteps : 90,
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animationEasing : "easeInOutExpo",
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tipOffsetX: -15,
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tipOffsetY: -45,
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tipClass: "pieTip",
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beforeDraw: function(){ },
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afterDrawed : function(){ },
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onPieMouseenter : function(e,data){ },
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onPieMouseleave : function(e,data){ },
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onPieClick : function(e,data){ }
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}, options),
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animationOptions = {
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linear : function (t){
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return t;
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},
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easeInOutExpo: function (t) {
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var v = t<.5 ? 8*t*t*t*t : 1-8*(--t)*t*t*t;
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return (v>1) ? 1 : v;
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}
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},
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requestAnimFrame = function(){
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return window.requestAnimationFrame ||
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window.webkitRequestAnimationFrame ||
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window.mozRequestAnimationFrame ||
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window.oRequestAnimationFrame ||
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window.msRequestAnimationFrame ||
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function(callback) {
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window.setTimeout(callback, 1000 / 60);
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};
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}();
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var $wrapper = $('<svg width="' + W + '" height="' + H + '" viewBox="0 0 ' + W + ' ' + H + '" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"></svg>').appendTo($this);
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var $groups = [],
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$pies = [],
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$lightPies = [],
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easingFunction = animationOptions[settings.animationEasing],
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pieRadius = Min([H/2,W/2]) - settings.edgeOffset,
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segmentTotal = 0;
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//Draw base circle
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var drawBasePie = function(){
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var base = document.createElementNS('http://www.w3.org/2000/svg', 'circle');
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var $base = $(base).appendTo($wrapper);
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base.setAttribute("cx", centerX);
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base.setAttribute("cy", centerY);
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base.setAttribute("r", pieRadius+settings.baseOffset);
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base.setAttribute("fill", settings.baseColor);
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}();
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//Set up pie segments wrapper
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var pathGroup = document.createElementNS('http://www.w3.org/2000/svg', 'g');
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var $pathGroup = $(pathGroup).appendTo($wrapper);
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$pathGroup[0].setAttribute("opacity",0);
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//Set up tooltip
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var $tip = $('<div class="' + settings.tipClass + '" />').appendTo('body').hide(),
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tipW = $tip.width(),
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tipH = $tip.height();
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for (var i = 0, len = data.length; i < len; i++){
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segmentTotal += data[i].value;
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var g = document.createElementNS('http://www.w3.org/2000/svg', 'g');
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g.setAttribute("data-order", i);
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g.setAttribute("class", settings.pieSegmentGroupClass);
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$groups[i] = $(g).appendTo($pathGroup);
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$groups[i]
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.on("mouseenter", pathMouseEnter)
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.on("mouseleave", pathMouseLeave)
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.on("mousemove", pathMouseMove)
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.on("click", pathClick);
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var p = document.createElementNS('http://www.w3.org/2000/svg', 'path');
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p.setAttribute("stroke-width", settings.segmentStrokeWidth);
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p.setAttribute("stroke", settings.segmentStrokeColor);
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p.setAttribute("stroke-miterlimit", 2);
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p.setAttribute("fill", data[i].color);
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p.setAttribute("class", settings.pieSegmentClass);
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$pies[i] = $(p).appendTo($groups[i]);
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var lp = document.createElementNS('http://www.w3.org/2000/svg', 'path');
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lp.setAttribute("stroke-width", settings.segmentStrokeWidth);
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lp.setAttribute("stroke", settings.segmentStrokeColor);
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lp.setAttribute("stroke-miterlimit", 2);
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lp.setAttribute("fill", data[i].color);
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lp.setAttribute("opacity", settings.lightPiesOpacity);
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lp.setAttribute("class", settings.lightPieClass);
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$lightPies[i] = $(lp).appendTo($groups[i]);
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}
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settings.beforeDraw.call($this);
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//Animation start
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triggerAnimation();
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function pathMouseEnter(e){
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var index = $(this).data().order;
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$tip.text(data[index].title + ": " + data[index].value).fadeIn(200);
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if ($groups[index][0].getAttribute("data-active") !== "active"){
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$lightPies[index].animate({opacity: .8}, 180);
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}
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settings.onPieMouseenter.apply($(this),[e,data]);
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}
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function pathMouseLeave(e){
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var index = $(this).data().order;
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$tip.hide();
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if ($groups[index][0].getAttribute("data-active") !== "active"){
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$lightPies[index].animate({opacity: settings.lightPiesOpacity}, 100);
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}
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settings.onPieMouseleave.apply($(this),[e,data]);
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}
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function pathMouseMove(e){
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$tip.css({
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top: e.pageY + settings.tipOffsetY,
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left: e.pageX - $tip.width() / 2 + settings.tipOffsetX
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});
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}
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function pathClick(e){
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var index = $(this).data().order;
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var targetGroup = $groups[index][0];
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for (var i = 0, len = data.length; i < len; i++){
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if (i === index) continue;
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$groups[i][0].setAttribute("data-active","");
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$lightPies[i].css({opacity: settings.lightPiesOpacity});
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}
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if (targetGroup.getAttribute("data-active") === "active"){
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targetGroup.setAttribute("data-active","");
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$lightPies[index].css({opacity: .8});
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} else {
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targetGroup.setAttribute("data-active","active");
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$lightPies[index].css({opacity: 1});
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}
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settings.onPieClick.apply($(this),[e,data]);
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}
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function drawPieSegments (animationDecimal){
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var startRadius = -PI/2,//-90 degree
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rotateAnimation = 1;
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if (settings.animation) {
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rotateAnimation = animationDecimal;//count up between0~1
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}
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$pathGroup[0].setAttribute("opacity",animationDecimal);
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//draw each path
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for (var i = 0, len = data.length; i < len; i++){
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var segmentAngle = rotateAnimation * ((data[i].value/segmentTotal) * (PI*2)),//start radian
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endRadius = startRadius + segmentAngle,
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largeArc = ((endRadius - startRadius) % (PI * 2)) > PI ? 1 : 0,
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startX = centerX + cos(startRadius) * pieRadius,
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startY = centerY + sin(startRadius) * pieRadius,
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endX = centerX + cos(endRadius) * pieRadius,
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endY = centerY + sin(endRadius) * pieRadius,
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startX2 = centerX + cos(startRadius) * (pieRadius + settings.lightPiesOffset),
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startY2 = centerY + sin(startRadius) * (pieRadius + settings.lightPiesOffset),
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endX2 = centerX + cos(endRadius) * (pieRadius + settings.lightPiesOffset),
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endY2 = centerY + sin(endRadius) * (pieRadius + settings.lightPiesOffset);
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var cmd = [
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'M', startX, startY,//Move pointer
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'A', pieRadius, pieRadius, 0, largeArc, 1, endX, endY,//Draw outer arc path
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'L', centerX, centerY,//Draw line to the center.
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'Z'//Cloth path
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];
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var cmd2 = [
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'M', startX2, startY2,
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'A', pieRadius + settings.lightPiesOffset, pieRadius + settings.lightPiesOffset, 0, largeArc, 1, endX2, endY2,//Draw outer arc path
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'L', centerX, centerY,
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'Z'
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];
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$pies[i][0].setAttribute("d",cmd.join(' '));
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$lightPies[i][0].setAttribute("d", cmd2.join(' '));
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startRadius += segmentAngle;
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}
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}
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var animFrameAmount = (settings.animation)? 1/settings.animationSteps : 1,//if settings.animationSteps is 10, animFrameAmount is 0.1
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animCount =(settings.animation)? 0 : 1;
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function triggerAnimation(){
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if (settings.animation) {
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requestAnimFrame(animationLoop);
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} else {
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drawPieSegments(1);
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}
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}
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function animationLoop(){
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animCount += animFrameAmount;//animCount start from 0, after "settings.animationSteps"-times executed, animCount reaches 1.
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drawPieSegments(easingFunction(animCount));
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if (animCount < 1){
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requestAnimFrame(arguments.callee);
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} else {
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settings.afterDrawed.call($this);
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}
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}
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function Max(arr){
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return Math.max.apply(null, arr);
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}
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function Min(arr){
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return Math.min.apply(null, arr);
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}
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return $this;
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};
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})(jQuery); |