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：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="js/fishchart.js"></script>
<title>Line Demo</title>
<script>
window.onload = function() {
var container = document.getElementById("my_container");
var seriesData = [{name:"本一", data:[330,348,355,345, 350, 348], color:"RGB(255,0,0)"},
{name:"本二", data:[300,326,328,320, 330, 325], color:"RGB(0,0,255)"},
{name:"本三", data:[248,288,277,290, 280, 290], color:"RGB(255,0,255)"}];
var config = {
type : "line",
width : 800,
height: 400,
series: seriesData,
container: container,
title:"江苏省2008～2013高考录取分数线",
tooltip : {
enable : true
},
animation :{
enable: true
},
legend : {
enable : true
},
yAxis :{
tickSize: 10,
title: "分数"
},
xAxis :{
tickSize: 10,
title: "年份",
categories: ["2008", "2009", "2010", "2011", "2012", "2013"]
}
};
fishChart.initSettings(config);
fishChart.render();
}
</script>
</head>
<body>
<h1>VML Line Chart Demo</h1>
<div id="my_container" style="width:600px; height:400px;">
</div>
</body>
</html>
饼图演示代码：
<html>
<head>
<script src="js/fishchart.js"></script>
<title>My Demo 1</title>
<script>
window.onload = function() {
var container = document.getElementById("my_container");
var seriesData = [{name:"apples", value:150, color:"RGB(255,0,0)"},
{name:"orange", value:100, color:"RGB(255,255,0)"},
{name:"banana", value:80, color:"RGB(255,0,255)"},
{name:"peaches", value:60, color:"RGB(0,255,255)"},
{name:"strawberries", value:40, color:"RGB(0,127,255)"}]
var config = {
type : "pie",
width : 600,
height: 400,
series: seriesData,
container: container,
unit: "kg",
title:"Fruit Sales",
tooltip : {
enable : true
},
animation :{
enable: true
},
legend : {
enable : true
},
text : {
enable: true
}
};
fishChart.initSettings(config);
fishChart.render();
}
</script>
</head>
<body>
<h1>farchart - Pie Demo</h1>
<div id="my_container" style="width:600px; height:400px;">
</div>
</body>
</html>
JS库源代码：有兴趣者可以自己添加更多图表支持
// 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<e.length; i++) {s.addRule("v\\:"+e[i],"behavior: url(#default#VML); display: inline-block;");} document.namespaces.add("v","urn:schemas-microsoft-com:vml");
}
}
function msieversion()
{
var ua = window.navigator.userAgent;
var msie = ua.indexOf ( "MSIE " );
if ( msie > 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<nums; i++) {
sum += this.series[i].value;
}
// draw title
this.customFillText(ctx, this.width/2 - this.edge.width, (this.isIE ? 10 : 30), this.circle.radius, 40, this.title.text, "white", "white", "black", '18pt Calibri');
if(this.isIE) {
this.renderPieShadow(ctx);
}
// render bar
var start = 0;
for(var i=0; i<nums; i++) {
var precent = this.series[i].value/sum;
this.renderPie(ctx, i, start, precent);
if(this.isIE) {
start += precent;
} else {
start += 2*Math.PI * precent;
}
}
// post add blur shadow
if(!this.isIE) {
this.renderPieShadow(ctx);
}
// render legend
this.renderPieLegend(ctx, sum);
}
// line plot
else if(this.type == "line")
{
// draw title
this.customFillText(ctx, (this.width/2 + this.title.x), (this.isIE ? 2 : this.edge.upper/2), this.width/2, 0, this.title.text, "white", "white", "black", '18pt Calibri');
// draw XY Axis
this.renderXYAxis(ctx);
// draw lines
var nums = this.series.length;
for(var i=0; i<nums; i++) {
this.renderOneLineCurve(ctx, i);
}
}
// render legend
this.renderLegend(ctx);
// enable tool-tip
if(this.tooltip.enable && !this.isIE && !this.animation.enable) {
var parent = this;
this.chartCanvas.addEventListener('mousemove', function(event) {
var x = event.pageX;
var y = event.pageY;
var canvas = event.target;
var bbox = canvas.getBoundingClientRect();
var loc = { x: x - bbox.left * (canvas.width / bbox.width),
y: y - bbox.top * (canvas.height / bbox.height)};
parent.showTooltips(loc, ctx);
}, false);
}
// enable animation
if(this.animation.enable) {
var parent = this;
if(this.isIE) {
ctx.insertBefore(this.animation.animCanvas);
}
setTimeout(function() {parent.playAnimation(parent);}, 1000/20);
}
},
renderOneLineCurve : function(ctx, index) {
var size = this.series[index].data.length;
var plotwidth = this.width - this.edge.left - this.edge.right;
var deltax = plotwidth/size;
var xpos = this.edge.left;
if(this.isIE) {
var vpolyLine = document.createElement("v:polyline");
vpolyLine.strokecolor=this.series[index].color;
vpolyLine.id = "vml-fline-" + index;
vpolyLine.filled="false"; // default is true, will fill area of close path
var points = "";
for(var i=0; i<size; i++) {
var value = this.series[index].data[i];
var deltay = Math.floor((value - this.yAxis.min) * this.yAxis.ygap);
// highlight the data point by circle.
if(this.point.enable) {
var hvoval = document.createElement("v:oval");
hvoval.style.left = (xpos + Math.floor(deltax/2) - this.point.radius);
hvoval.style.top = (this.height - this.edge.bottom - deltay - this.point.radius);
hvoval.style.width = (this.point.radius * 2) + "px";
hvoval.style.height = (this.point.radius * 2) + "px";
hvoval.strokecolor = this.series[index].color;
hvoval.fillcolor = this.series[index].color;
hvoval.title = this.xAxis.categories[i] + " " + this.series[index].name + " : " + + value; // tool-tip
ctx.insertBefore(hvoval);
}
// - end it
points += (xpos + Math.floor(deltax/2)) + "," + (this.height - this.edge.bottom - deltay) + " ";
xpos += deltax;
}
vpolyLine.strokeweight="1px";
vpolyLine.points=points;
ctx.insertBefore(vpolyLine);
}
else
{
ctx.save();
ctx.beginPath();
ctx.lineWidth = 1;
for(var i=0; i<size; i++) {
var value = this.series[index].data[i];
var deltay = Math.floor((value - this.yAxis.min) * this.yAxis.ygap);
ctx.strokeStyle=this.series[index].color;
if(i == 0) {
ctx.moveTo(xpos + Math.floor(deltax/2), this.height - this.edge.bottom - deltay);
} else {
ctx.lineTo(xpos + Math.floor(deltax/2), this.height - this.edge.bottom - deltay);
}
xpos += deltax;
}
ctx.stroke();
ctx.restore();
// draw dot circle
if(!this.point.enable)
return;
ctx.save();
var xpos = this.edge.left;
for(var i=0; i<size; i++) {
var value = this.series[index].data[i];
var deltay = Math.floor((value - this.yAxis.min) * this.yAxis.ygap);
ctx.beginPath();
ctx.arc(xpos + Math.floor(deltax/2), this.height - this.edge.bottom - deltay, this.point.radius, 0, 2*Math.PI, false);
ctx.closePath();
ctx.fillStyle=this.series[index].color;
ctx.fill();
xpos += deltax;
}
ctx.restore();
}
},
renderPieLegend : function(ctx, sum) {
if(!this.legend.enable) return;
var nums = this.series.length;
ctx.font = '10pt Calibri';
var pos = (this.width/2 > (this.circle.radius+50)) ? 50 : (this.circle.cx - this.circle.radius);
for(var i=0; i<nums; i++) {
var x = this.series[i].value/sum;
x = Math.round (x*100) / 100;
var tipStr = this.series[i].name + ": " + (x * 100).toFixed(0) + "%";
this.series[i].precent = tipStr;
this.renderRect(ctx, (pos - 40), (20*i+10), 10, 10, this.series[i].color, this.series[i].color, 0);
this.customFillText(ctx, (pos - 25), (this.isIE ? (20*i + 1) : (20*i+20)), 100, 0, tipStr, "white", "white", "black", "10pt Calibri");
}
},
renderPieShadow : function(ctx) {
if(this.isIE) {
var voval = document.createElement("v:oval");
voval.style.left=(this.circle.cx - this.circle.radius) + "px";
voval.style.top=(this.circle.cy - this.circle.radius) + "px";
voval.style.width=this.circle.radius*2 + "px";
voval.style.height=this.circle.radius*2 + "px";
voval.style.position="absolute";
voval.strokecolor="RGB(150,150,150)";
voval.strokeweight="4pt";
ctx.insertBefore(voval);
} else {
ctx.save();
ctx.shadowColor = "black";
ctx.shadowOffsetX = 0;
ctx.shadowOffsetY = 0;
ctx.shadowBlur = 10;
ctx.beginPath();
ctx.arc(this.circle.cx, this.circle.cy, this.circle.radius, 0, Math.PI * 2, false);
ctx.closePath();
ctx.lineWidth = 1;
ctx.strokeStyle = "RGBA(127,127,127,1)";
ctx.stroke();
ctx.restore();
}
},
renderPie : function(ctx, index, startp, precent) {
if(this.isIE) {
var start = Math.round (startp*100);
var end = Math.round (precent*100) + start;
var part = document.createElement("v:shape");
part.style.width=Math.min(this.width, this.height) + "px";
part.style.height=Math.min(this.width, this.height) + "px";
part.style.position="absolute";
part.id = "vml-pie-part-" + index;
var path = "";
for (var i= start; i <= end; i++) {
x = Math.floor((Math.cos(i*Math.PI/50)*this.circle.radius)+this.circle.cx);
y = Math.floor((Math.sin(i*Math.PI/50)*this.circle.radius)+this.circle.cy);
xs = x.toString();
ys = y.toString();
path += xs + ", " + ys + ", ";
}
part.strokecolor=this.series[index].color;
part.strokeweight="0pt";
part.fillcolor = this.series[index].color;
part.path= "m " + this.circle.cx + "," + this.circle.cy +" l " + path + this.circle.cx + "," + this.circle.cy + " x e";
ctx.insertBefore(part);
// render text content
if(this.text.enable) {
var textLine = document.createElement("v:line");
var fx = Math.floor((Math.cos((start + (end - start)/2)*Math.PI/50)*this.circle.radius)+this.circle.cx);
var fy = Math.floor((Math.sin((start + (end - start)/2)*Math.PI/50)*this.circle.radius)+this.circle.cy);
var tx = (fx < this.circle.cx) ? (fx - this.edge.width) : (fx + this.edge.width);
textLine.from = fx + "," + fy;
textLine.to = tx + "," + fy;
ctx.insertBefore(textLine);
var textPos = (fx < this.circle.cx) ? (fx - this.edge.width*2) : (fx + this.edge.width);
this.customFillText(ctx, (textPos), (fy-20), 100, 0, this.series[index].name + ": " + (precent * 100).toFixed(0) + "%", "white", "white", "black", "10pt Calibri");
}
if(this.tooltip.enable) {
var _parent = this;
part.title = "Index: " + (index + 1) + "\n" + this.series[index].name + ": " + this.series[index].value + this.unit + "\n" +
this.series[index].name + ": " + (precent * 100).toFixed(0) + "%" + "\n";
part.attachEvent('onmouseover', function (event) {
var srcElement = event.srcElement;
srcElement.strokecolor= "white";
srcElement.strokeweight="3pt";
});
part.attachEvent('onmouseout', function (event) {
var srcElement = event.srcElement;
srcElement.strokecolor=_parent.series[index].color;
srcElement.strokeweight="0pt";
});
}
} else {
var endAngle = startp + 2*Math.PI*precent;
ctx.save();
ctx.beginPath();
ctx.arc(this.circle.cx, this.circle.cy, this.circle.radius, startp, endAngle, false);
ctx.moveTo(this.circle.cx, this.circle.cy);
ctx.lineTo(this.circle.cx + this.circle.radius * Math.cos(startp), this.circle.cy + this.circle.radius * Math.sin(startp));
ctx.lineTo(this.circle.cx + this.circle.radius * Math.cos(endAngle), this.circle.cy + this.circle.radius * Math.sin(endAngle));
ctx.lineTo(this.circle.cx, this.circle.cy);
ctx.closePath();
ctx.fillStyle = this.series[index].color;
ctx.strokeStyle = this.series[index].color;
ctx.fill();
ctx.stroke();
ctx.restore();
// render text content
if(this.text.enable) {
var halfEndAngle = startp + Math.PI*precent;
var hx = this.circle.cx + this.circle.radius * Math.cos(halfEndAngle);
var hy = this.circle.cy + this.circle.radius * Math.sin(halfEndAngle);
ctx.beginPath();
ctx.moveTo(hx, hy);
var linePos = (hx < this.circle.cx) ? (hx - this.edge.width) : (hx + this.edge.width);
ctx.lineTo(linePos, hy);
ctx.closePath();
ctx.strokeStyle="black";
ctx.stroke();
var textPos = (hx < this.circle.cx) ? (hx - this.edge.width*2) : (hx + this.edge.width);
precent = Math.round (precent*100) / 100;
var size = this.text.content.length;
var tipStr = (size > 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<num; i++) {
var dis = this.series[i].data[xindex] - value;
distance[i] = Math.abs(dis);
}
var min = distance[0];
var yindex = 0;
for(var i=0; i<num; i++) {
if(min > 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<nums; s++) {
sum += this.series[s].value;
}
var deltaArc = 0;
var index = 0;
for(var i=0; i<nums; i++) {
var precent = this.series[i].value/sum;
deltaArc += 2*Math.PI * precent;
if(angle<=deltaArc) {
index = i;
break;
}
}
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;
}
// only draw once
// if(index == this.tooltips.index){
// return;
// }
this.clearTooltips(ctx);
this.tooltip.index = index;
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[index].color;
m_context.fillStyle="RGBA(255,255,255,0.7)";
// m_context.strokeRect(2, 2, this.tooltips.tooltipCanvas.width-4, this.tooltips.tooltipCanvas.height-4);
// m_context.fillRect(2,2,this.tooltips.tooltipCanvas.width-4, this.tooltips.tooltipCanvas.height-4);
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)";
m_context.fillText("Index: " + (index + 1), 5, 20);
m_context.fillText(this.series[index].name + ": " + this.series[index].value + this.unit, 5, 40);
m_context.fillText(this.series[index].precent, 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);
} 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<nums; i++) {
sum += this.series[i].value;
}
// draw title
this.customFillText(ctx, this.width/2 - this.edge.width, (this.isIE ? 10 : 30), this.circle.radius, 40, this.title, "white", "white", "black", '18pt Calibri');
if(this.isIE) {
this.renderPieShadow(ctx);
}
// render bar
var start = 0;
for(var i=0; i<nums; i++) {
var precent = this.series[i].value/sum;
this.renderPie(ctx, i, start, precent);
if(this.isIE) {
start += precent;
} else {
start += 2*Math.PI * precent;
}
}
// post add blur shadow
if(!this.isIE) {
this.renderPieShadow(ctx);
}
// render legend
this.renderPieLegend(ctx, sum);
}
},
renderXYAxis : function(ctx) {
this.drawXYTitles(ctx);
if(this.type == "line") {
// draw ticks and markers
var nums = this.series.length;
if(nums == 0) return;
var min = 0;
var max = 0;
min = this.series[0].data[0];
max = this.series[0].data[0];
for(var s = 0; s < nums; s++) {
var size = this.series[s].data.length;
for(var i=0; i<size; i++) {
min = Math.min(min, this.series[s].data[i]);
max = Math.max(max, this.series[s].data[i]);
}
}
// calculate the text gap in Y Axis
var delta = max - min;
this.yAxis.padding = delta/10;
this.yAxis.min = min - this.yAxis.padding;
this.yAxis.max = max + this.yAxis.padding;
var sum = this.yAxis.max - this.yAxis.min;
var plotHeight = this.height - this.edge.upper - this.edge.bottom;
var ygap = plotHeight/sum;
this.yAxis.plotheight = plotHeight;
this.yAxis.ygap = ygap;
var index = Math.floor(this.yAxis.min);
var first = true;
// draw Y Axis and dash line
for(var ypos=0; ypos<(plotHeight + this.edge.upper/2); ypos+=ygap*this.yAxis.tickSize)
{
this.customFillText(ctx, this.isIE ? (this.edge.left/3) : this.edge.left/2, this.isIE ? (this.height - this.edge.bottom - Math.floor(ypos)-15) : this.height - this.edge.bottom - Math.floor(ypos),
40, 0, "" + index, "white", "white", "black", "10px Arial");
index = index + this.yAxis.tickSize;
// draw dash line
if(!first) {
this.dashedLineTo(ctx, this.edge.left, this.height - this.edge.bottom - Math.floor(ypos), this.width - this.edge.right, this.height - this.edge.bottom - Math.floor(ypos), 5);
}
first = false;
}
// draw X Axis sub title
var csize = this.xAxis.categories.length;
var plotwidth = this.width - this.edge.left - this.edge.right;
delta = plotwidth/ csize;
var xpos = this.edge.left;
for(var x=0; x<csize; x++) {
this.customFillText(ctx, (xpos + delta/2), this.isIE ? (this.height - (this.edge.bottom*0.75) - 15):this.height - (this.edge.bottom*0.75),
50, 0, this.xAxis.categories[x], "white", "white", "black", "10px Arial");
xpos += delta;
}
} else if(this.type == "scatter") {
} else if(this.type == "column") {
} else if(this.type == "bar") {
}
},
drawXYTitles : function(ctx) {
if(this.isIE) {
// draw X Axis and title
var xLine = document.createElement("v:line");
xLine.from = this.edge.left + "," + (this.height-this.edge.bottom);
xLine.to = (this.width - this.edge.right) + "," + (this.height-this.edge.bottom);
ctx.insertBefore(xLine);
this.customFillText(ctx, this.width/2, this.height-this.edge.bottom/2, (this.width/2 - this.edge.right), 0, this.xAxis.title, "white", "white", "black", "12px Arial");
// draw Y title, VML rotate text is very trick thing,
// the center point is itself half of width and height, very bad way
var yTitleRect = document.createElement("v:rect");
yTitleRect.style.left= Math.floor(-this.height/2 + 10) + "px";
yTitleRect.style.top= (this.height - this.edge.bottom) + "px";
yTitleRect.style.width=Math.floor(this.height) + "px";
yTitleRect.style.height="0px";
yTitleRect.fillcolor = "white";
yTitleRect.strokecolor="white";
yTitleRect.strokeweight="0pt";
var ytitleTextBox = document.createElement("v:textbox");
ytitleTextBox.style.font = "12px Arial";
ytitleTextBox.innerText = this.yAxis.title;
yTitleRect.style.rotation = "90"; // only make the text vertical, bad!!!
yTitleRect.insertBefore(ytitleTextBox);
ctx.insertBefore(yTitleRect);
} else {
// draw X Axis and title
ctx.save();
this.onePixelLineTo(ctx, this.edge.left, this.height-this.edge.bottom, this.width - this.edge.right, this.height-this.edge.bottom, "white", false);
ctx.restore();
ctx.font="12px Arial";
ctx.fillText(this.xAxis.title, this.width/2, this.height-this.edge.bottom/4);
// draw Y title
ctx.save();
ctx.font="12px Arial";
ctx.translate(this.width/2, this.height/2);
ctx.rotate(-Math.PI/2);
ctx.fillText(this.yAxis.title, 20, -(this.width/2 - 20));
ctx.restore();
}
},
renderLegend : function(ctx) {
if(!this.legend.enable || this.type == "pie") {
return;
}
// TODO:zhigang, legend here
},
renderBorder : function(ctx) {
this.renderRect(ctx, 0, 0, this.width, this.height, "white", "black", 1);
},
playAnimation : function(parent) {
if(parent.animation.hh < parent.height) {
if(parent.isIE) {
var node = document.getElementById("fishchart_mask_rect");
node.style.top= this.animation.hh + "px";
node.style.height= (this.height - this.animation.hh) + "px";
parent.animation.hh = parent.animation.hh + 10;
setTimeout(function() {parent.playAnimation(parent);}, 1000/20);
} else {
parent.animation.pctx.save();
parent.animation.pctx.globalAlpha=0.5;
parent.animation.pctx.clearRect(0,0,parent.width, parent.height);
parent.renderBorder(parent.animation.pctx);
parent.animation.pctx.drawImage(parent.animation.animCanvas, 0, 0, parent.width, this.animation.hh, 0, 0, parent.width, this.animation.hh);
parent.animation.hh = parent.animation.hh + 10;
parent.animation.pctx.restore();
setTimeout(function() {parent.playAnimation(parent);}, 1000/20);
}
} else {
// remove xxxxx or change the alpha value
if(parent.isIE) {
var node = document.getElementById("fishchart_mask_rect");
if(node != null) {
parent.animation.pctx.removeChild(node);
}
} else {
parent.animation.pctx.clearRect(0,0,parent.width, parent.height);
parent.renderBorder(parent.animation.pctx);
parent.animation.pctx.drawImage(parent.animation.animCanvas, 0, 0, parent.width, parent.height, 0, 0, parent.width, parent.height);
}
// enable tool-tip functionality
if(!this.isIE && parent.animation.enable && parent.tooltip.enable) {
parent.chartCanvas.addEventListener('mousemove', function(event) {
var x = event.pageX;
var y = event.pageY;
var canvas = event.target;
var bbox = canvas.getBoundingClientRect();
var loc = { x: x - bbox.left * (canvas.width / bbox.width),
y: y - bbox.top * (canvas.height / bbox.height)};
console.log("ddddddddddddddddddddd");
parent.showTooltips(loc, (parent.animation.enable ? parent.animation.pctx : ctx));
}, false);
}
}
},
clearTooltips : 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 {
this.redrawPlot(ctx);
}
},
redrawPlot : function(ctx) {
if(this.type === "pie") {
this.redrawPie(ctx);
} else if(this.type == "line") {
ctx.clearRect(0,0,this.width, this.height);
// draw title
this.customFillText(ctx, (this.width/2 + this.title.x), (this.isIE ? 2 : this.edge.upper/2), this.width/2, 0, this.title.text, "white", "white", "black", '18pt Calibri');
// draw XY Axis
this.renderXYAxis(ctx);
// draw lines
var nums = this.series.length;
for(var i=0; i<nums; i++) {
this.renderOneLineCurve(ctx, i);
}
}
},
showTooltips : function(loc, ctx) {
if(this.type === "pie") {
this.showPieTooltips(loc, ctx);
} else if(this.type === "line") {
this.showLineTooltips(loc, ctx);
}
},
getCanvasContext : function() {
var ctx = null;
if(this.isIE) {
// create group
ctx = document.createElement("v:group");
var min_size = Math.min(this.width, this.height);
ctx.style.width = min_size;
ctx.style.height = min_size;
// default the group will be center inside the DIV element
ctx.coordsize = min_size + ' ' + min_size;
this.container.insertBefore(ctx);
if(this.animation.enable) {
this.animation.animCanvas = document.createElement("v:rect");
this.animation.animCanvas.id = "fishchart_mask_rect";
this.animation.animCanvas.style.left= "0px";
this.animation.animCanvas.style.top= "0px";
this.animation.animCanvas.style.width= this.width + "px";
this.animation.animCanvas.style.height= this.height + "px";
this.animation.animCanvas.fillcolor = "white";
this.animation.animCanvas.strokecolor = "white";
this.animation.animCanvas.strokeweight= "0pt";
var ttfill = document.createElement("v:fill");
ttfill.opacity = "100%";
this.animation.animCanvas.insertBefore(ttfill);
this.animation.pctx = ctx;
}
} else {
if(this.animation.enable) {
this.animation.animCanvas = document.createElement("canvas");
this.animation.animCanvas.width = this.width;
this.animation.animCanvas.height = this.height;
this.animation.pctx = this.chartCanvas.getContext("2d"); // parent ctx
ctx = this.animation.animCanvas.getContext("2d");
} else {
ctx = this.chartCanvas.getContext("2d");
}
}
return ctx;
},
getRoundRect : function(ctx, x, y, width, height, radius, fill, stroke) {
if (typeof stroke == "undefined") {
stroke = true;
}
if (typeof radius === "undefined") {
radius = 5;
}
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y+ height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
if (stroke) {
ctx.stroke();
}
if (fill) {
ctx.fill();
}
},
renderRect : function (ctx, x, y, width, height, fillColor, strokeColor, lineWidth)
{
if(this.isIE) {
var vrect = document.createElement("v:rect");
vrect.style.left= x + "px";
vrect.style.top= y + "px";
vrect.style.width= width + "px";
vrect.style.height= height + "px";
vrect.fillcolor = fillColor;
vrect.strokecolor=strokeColor;
vrect.strokeweight= lineWidth + "pt";
ctx.insertBefore(vrect);
} else {
ctx.save();
ctx.fillStyle= fillColor;
ctx.strokeStyle= strokeColor;
ctx.fillRect(x, y, width, height);
ctx.strokeRect(x, y, width, height);
ctx.restore();
}
},
customFillText : function (ctx, x, y, width, height, textContent, fillColor, strokeColor, fontColor, fontSize)
{
if(this.isIE) {
var textRect = document.createElement("v:rect");
textRect.style.left=(x) + "px";
textRect.style.top=(y) + "px";
textRect.style.width=width + "px";
textRect.style.height=height + "px";
textRect.fillcolor = fillColor;
textRect.strokecolor = strokeColor;
textRect.strokeweight="0pt";
var textBox = document.createElement("v:textbox");
textBox.style.font = fontSize;// "10pt Calibri";
textBox.innerText = textContent;
// make stroke and fill attribute transparent is 100%
var ttfill = document.createElement("v:fill");
ttfill.opacity = "0%";
var ttstroke = document.createElement("v:stroke");
ttstroke.opacity = "0%";
// append to group element
textRect.insertBefore(ttstroke);
textRect.insertBefore(ttfill);
textRect.insertBefore(textBox);
ctx.insertBefore(textRect);
} else {
ctx.save();
ctx.font = fontSize;//'10pt Calibri';
ctx.fillStyle=fontColor;
ctx.fillText(textContent, x, y);
ctx.restore();
}
},
onePixelLineTo : function(ctx, fromX, fromY, toX, toY, backgroundColor, vertical) {
var currentStrokeStyle = this.strokeStyle;
ctx.beginPath();
ctx.moveTo(fromX, fromY);
ctx.lineTo(toX, toY);
ctx.closePath();
ctx.lineWidth=2;
ctx.stroke();
ctx.beginPath();
if(vertical) {
ctx.moveTo(fromX+1, fromY);
ctx.lineTo(toX+1, toY);
} else {
ctx.moveTo(fromX, fromY+1);
ctx.lineTo(toX, toY+1);
}
ctx.closePath();
ctx.lineWidth=2;
ctx.strokeStyle=backgroundColor;
ctx.stroke();
ctx.strokeStyle = currentStrokeStyle;
},
dashedLineTo : function (ctx, fromX, fromY, toX, toY, pattern) {
if(this.isIE) {
var vdashline = document.createElement("v:line");
var vdashlineStroke = document.createElement("v:stroke");
vdashline.from = fromX + "," + fromY;
vdashline.to = toX + "," + toY;
vdashlineStroke.dashstyle="dash";
vdashline.insertBefore(vdashlineStroke);
ctx.insertBefore(vdashline);
} else {
ctx.save();
ctx.lineWidth = 1;
ctx.translate(0.5,0.5);
// default interval distance -> 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<dashlineInteveral; dl++) {
if(dl%2) {
ctx.lineTo(fromX + dl*deltax, fromY + dl*deltay);
} else {
ctx.moveTo(fromX + dl*deltax, fromY + dl*deltay);
}
}
ctx.stroke();
ctx.restore();
}
}
};
