基于VML与HTML5Canva实现的跨浏览器饼图与折线图-创新互联

本来想自己做个库的，毅力不够啊，所以放出源代码

当前实现的框架功能有：

1. 支持IE6+以上版本，支持Chrome， 支持FireFox

2. 动画加载机制

3. tooltip支持

4. legend支持

5. 功能丰富的参数设置

当前支持的图形种类有两种：饼图与折线图，将来也许会不定期更新，不断完善！

希望还有点毅力和时间做话。不废话啦，直接上效果图：

折线图演示代码：

     	   
VML Line Chart Demo
 
 
  

    	   
farchart - Pie Demo
 
 
  

// farchart farchart.js version 0.0.1, 28 August 2013   // (c) 2013 by Jia ZhiGang. All Rights reserved.  // Copyright (c) 2013 Jia ZhiGang (http://www.edinme.com) // // far chart is freely distributable under the terms of an GPL-style license. //  // 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. // // For details, see the farchart web site: http://www.edinme.com function check_vmlCapability() { 	if(document.namespaces['v']==null) { 		var e=["shape","shapetype","group","background","path","formulas","handles","fill","stroke","shadow","textbox","textpath","imagedata","line","polyline","curve","roundrect","oval","rect","arc","image"],s=document.createStyleSheet();  		for(var i=0; i 0 )     { 	   // If Internet Explorer, return version number 	   return parseInt (ua.substring (msie+5, ua.indexOf (".", msie )));	       }          else    { 		// If another browser, return 0	    		return 0; 	}                 }  var fishChart = { 	type: "null", // global flag, default     width: 600,     height: 400,     series: [],     unit: "kg",     container: null, 	title: { 		text: "Far Chart", 		x: -100 // center offset 	},     isIE: true,     legend : {     	enable : true     },     edge : {     	width: 50, // for pie     	height: 50, // for pie 		left: 50, // for other plot 		upper: 40, 		bottom: 40, 		right: 60     }, 	yAxis: { 		title: "Y Axis", 		vgap: 0, 		plotHeight: 0, 		min: 0, 		max: 0, 		tickSize: 10, 		padding: 5 	}, 	xAxis: { 		categories: [], 		tickSize : 10, 		autoTick:true, 		xgap : 0, 		min:0, 		max:0, 		title:"X Axis" 	},     animation: {     	enable: true,     	hh: 1, 		animCanvas:null, 		pctx: null     },     tooltip: {     	enable: true,     	tooltipCanvas : null,     	ttContext: null,     	index: -1     },     circle : { // for pie     	cx: 0,     	cy: 0,     	radius: 0     	     },     text : { // for pie     	enable: false,     	content:[]     },      	point : { // for line and scatter plot 		enable : true, 		radius : 4 	},          initSettings: function (config) {     	this.type = config.type;     	this.container = config.container;         this.width = config.width;         this.height = config.height;         this.series = config.series;         this.title.text = config.title;         this.unit = config.unit;                  // tool-tip, animation, legend setting data         if(config.tooltip != undefined) {         	this.tooltip.enable = config.tooltip.enable;        	         }         if(config.animation != undefined) {         	this.animation.enable = config.animation.enable;        	         }         if(config.legend != undefined) {         	this.legend.enable = config.legend.enable;        	         }         if(config.text != undefined) {         	this.text.enable = config.text.enable;         }                  // edge setting data         if(config.edge != undefined && config.edge.right != undefined) {         	this.edge.right = config.edge.right;        	         }         if(config.edge != undefined && config.edge.left != undefined) {         	this.edge.left = config.edge.left;        	         }         if(config.edge != undefined && config.edge.bottom != undefined) {         	this.edge.bottom = config.edge.bottom;        	         }         if(config.edge != undefined && config.edge.upper != undefined) {         	this.edge.upper = config.edge.upper;        	         }                  // xAxis setting         if(config.xAxis != undefined) {        	         	this.xAxis.title= config.xAxis.title;         	this.xAxis.tickSize = config.xAxis.tickSize;         }                  if(config.xAxis != undefined && config.xAxis.categories != undefined) {         	this.xAxis.categories = config.xAxis.categories;         }                  // yAxis setting         if(config.yAxis != undefined) {         	this.yAxis.title = config.yAxis.title;         	this.yAxis.tickSize = config.yAxis.tickSize;        	         }                   // decide whether render plot using HTML5 Canvas or VML         if(msieversion() == 0) {         	this.chartCanvas = document.createElement("canvas");         	this.chartCanvas.id = "fc_canvas";         	this.container.appendChild(this.chartCanvas);         	this.chartCanvas.width = config.width;         	this.chartCanvas.height = config.height;         	this.isIE = false;         } else {         	check_vmlCapability();         	this.isIE = true;         }     },          render : function() {    	     	var ctx = this.getCanvasContext();     	this.renderBorder(ctx);     	if(this.type === "pie") {         	// initialization circle         	this.circle.cx = this.width/2;         	this.circle.cy = this.height/2;         	this.circle.radius = Math.min(this.width/2, this.height/2) - Math.max(this.edge.width, this.edge.height);         	if(this.circle.radius <= 0) {         		console.log("Can not reader the chart, Circle is too small.");         		return;         	}         	         	// draw each arc according to data series          	var sum = 0;         	var nums = this.series.length;         	for(var i=0; i (this.circle.radius+50)) ? 50 : (this.circle.cx - this.circle.radius);     	for(var i=0; i index) ? this.text.content[index] : this.series[index].name + ": " + (precent * 100).toFixed(0) + "%";         		ctx.font = '10pt Calibri';         		ctx.fillStyle="black";         		ctx.fillText(tipStr, textPos, hy);         	}     	}     },          showLineTooltips : function(loc, ctx) {     	if(!this.tooltip.enable) {     		return;     	}     	var size = this.series[0].data.length;     	var plotwidth = this.width - this.edge.left - this.edge.right; 		var deltax = (plotwidth/ size);     	var xunit = ((loc.x - this.edge.left)/deltax); //: */loc.x - this.edge.left;     	var deltay = this.height - this.edge.bottom - loc.y;     	if(xunit > 0 && deltay > 0) {     		var value = deltay/this.yAxis.ygap + this.yAxis.min;     		var xindex = Math.floor(xunit);     		var xpoint = xunit - xindex;     		if(xpoint < 0.55 && xpoint >0.45) {     			var num = this.series.length;     			var distance = [];     			for(var i=0; i distance[i]) {     					min = distance[i];     					yindex = i;     				}     			}     			     			if(this.series[yindex].data[xindex] > Math.floor(value - 3) && this.series[yindex].data[xindex] < Math.floor(value + 3) ) {     				this.renderLineTooltips(ctx, yindex, xindex, loc);     			}      			// clear tool tip     			else {     				this.clearTooltips(ctx);     			}     		}      		else {     			this.clearTooltips(ctx);     		}     	}      	else {     		this.clearTooltips(ctx);     	}     },          renderLineTooltips : function(ctx, yindex, xindex, loc) { 		// show tool tip 		this.clearTooltips(ctx); 		if(this.tooltip.tooltipCanvas == null) { 			this.tooltip.tooltipCanvas = document.createElement("canvas"); 			this.tooltip.ttContext = this.tooltip.tooltipCanvas.getContext("2d");     		this.tooltip.tooltipCanvas.width = 150;     		this.tooltip.tooltipCanvas.height = 100; 		} 		var m_context = this.tooltip.ttContext; 		m_context.save(); 		m_context.clearRect(0, 0, this.tooltip.tooltipCanvas.width, this.tooltip.tooltipCanvas.height); 		m_context.lineWidth = 2; 		m_context.strokeStyle = this.series[yindex].color; 		m_context.fillStyle="RGBA(255,255,255,0.7)"; 		this.getRoundRect(m_context, 2,2,this.tooltip.tooltipCanvas.width-4, this.tooltip.tooltipCanvas.height-4, 5, true, true); 		m_context.font="14px Arial"; 		m_context.fillStyle="RGBA(0,0,0,1)"; 		if(this.type == "line") { 			m_context.fillText((this.xAxis.title + ": " + this.xAxis.categories[xindex]), 5, 20); 			m_context.fillText(this.series[yindex].name + ": " + this.series[yindex].data[xindex], 5, 40);			 		} else { 			m_context.fillText(this.series[yindex].name, 5, 20); 			m_context.fillText(this.xAxis.title + ":" + this.series[yindex].data[xindex][0], 5, 40); 			m_context.fillText(this.yAxis.title + ":" + this.series[yindex].data[xindex][1], 5, 60); 		} 		m_context.restore(); 		 		// make tool-tip rectangle is always visible  		if((loc.x + this.tooltip.tooltipCanvas.width)> this.width) { 			loc.x = loc.x - this.tooltip.tooltipCanvas.width; 		} 		if((loc.y - this.tooltip.tooltipCanvas.height) <= 0) { 			loc.y = loc.y + this.tooltip.tooltipCanvas.height; 		} 		ctx.drawImage(this.tooltip.tooltipCanvas, 0, 0, this.tooltip.tooltipCanvas.width, this.tooltip.tooltipCanvas.height,  				loc.x, loc.y-this.tooltip.tooltipCanvas.height, this.tooltip.tooltipCanvas.width, this.tooltip.tooltipCanvas.height);     },          showPieTooltips : function(loc, ctx) {     	if(!this.tooltip.enable) {     		return;     	}     	var dx = loc.x - this.width/2;     	var dy = loc.y - this.height/2;     	var dis = Math.floor(Math.sqrt(dx * dx + dy * dy));     	if(dis <= this.circle.radius) {     		// draw tool tip text     		var angle = Math.atan2(dy,dx);     		if(angle <= 0) {     			// if[-Math.PI, 0], make it[Math.PI, 2*Math.PI]     			angle = angle + 2*Math.PI;     		}     		         	var sum = 0;         	var nums = this.series.length;         	for(var s=0; s this.width) { 				loc.x = loc.x - this.tooltip.tooltipCanvas.width; 			} 			if((loc.y - this.tooltip.tooltipCanvas.height) <= 0) { 				loc.y = loc.y + this.tooltip.tooltipCanvas.height; 			} 			ctx.drawImage(this.tooltip.tooltipCanvas, 0, 0, this.tooltip.tooltipCanvas.width, this.tooltip.tooltipCanvas.height,  					loc.x, loc.y-this.tooltip.tooltipCanvas.height, this.tooltip.tooltipCanvas.width, this.tooltip.tooltipCanvas.height);	     	} else {     		this.tooltip.index = -1;     		this.clearTooltips(ctx);     	}     },          redrawPie : function(ctx) {     	if(this.animation.enable) {     		ctx.clearRect(0,0,this.width, this.height);     		this.renderBorder(ctx);     		ctx.drawImage(this.animation.animCanvas, 0, 0, this.width, this.height, 0, 0, this.width, this.height);      	} else {         	// draw each arc according to data series          	var sum = 0;         	var nums = this.series.length;         	for(var i=0; i 5px 	    	if (typeof pattern === "undefined") { 	    		pattern = 5; 	    	} 	 	    	// calculate the delta x and delta y 	    	var dx = (toX - fromX); 	    	var dy = (toY - fromY); 	    	var distance = Math.floor(Math.sqrt(dx*dx + dy*dy)); 	    	var dashlineInteveral = (pattern <= 0) ? distance : (distance/pattern); 	    	var deltay = Math.floor((dy/distance) * pattern); 	    	var deltax = Math.floor((dx/distance) * pattern); 	    	 	    	// draw dash line 	    	ctx.beginPath(); 	    	for(var dl=0; dl
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