?? chart.js
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/* Copyright (c) 2004-2006, The Dojo Foundation All Rights Reserved. Licensed under the Academic Free License version 2.1 or above OR the modified BSD license. For more information on Dojo licensing, see: http://dojotoolkit.org/community/licensing.shtml*/dojo.provide("dojo.widget.vml.Chart");
dojo.require("dojo.widget.HtmlWidget");
dojo.require("dojo.widget.Chart");
dojo.require("dojo.math");
dojo.require("dojo.html");
//dojo.require("dojo.vml");
dojo.require("dojo.graphics.color");
dojo.widget.vml.Chart=function(){
dojo.widget.Chart.call(this);
dojo.widget.HtmlWidget.call(this);
};
dojo.inherits(dojo.widget.vml.Chart, dojo.widget.HtmlWidget);
dojo.lang.extend(dojo.widget.vml.Chart, {
// widget props
templatePath:null,
templateCssPath:null,
// state
_isInitialized:false,
hasData:false,
// chart props
vectorNode:null,
plotArea:null,
dataGroup:null,
axisGroup:null,
properties:{
height:400, // defaults, will resize to the domNode.
width:600,
plotType:null,
padding:{
top:10,
bottom:2,
left:60,
right:30
},
axes:{
x:{
plotAt:0,
label:"",
unitLabel:"",
unitType:Number,
nUnitsToShow:10,
range:{
min:0,
max:200
}
},
y:{
plotAt:0,
label:"",
unitLabel:"",
unitType:Number,
nUnitsToShow:10,
range:{
min:0,
max:200
}
}
}
},
fillInTemplate:function(args,frag){
this.initialize();
this.render();
},
parseData:function(){
},
initialize:function(){
// parse the data first.
this.parseData();
// render the body of the chart, not the chart data.
if(this.vectorNode){ this.destroy(); }
this.vectorNode=document.createElement("div");
this.vectorNode.style.width=this.properties.width+"px";
this.vectorNode.style.height=this.properties.height+"px";
this.vectorNode.style.position="relative";
this.domNode.appendChild(this.vectorNode);
var plotWidth=this.properties.width-this.properties.padding.left-this.properties.padding.right;
var plotHeight=this.properties.height-this.properties.padding.top-this.properties.padding.bottom;
this.plotArea=document.createElement("div");
this.plotArea.style.position="absolute";
this.plotArea.style.backgroundColor="#fff";
this.plotArea.style.top=(this.properties.padding.top)-2+"px";
this.plotArea.style.left=(this.properties.padding.left-1)+"px";
this.plotArea.style.width=plotWidth+"px";
this.plotArea.style.height=plotHeight+"px";
this.vectorNode.appendChild(this.plotArea);
this.dataGroup=document.createElement("div");
this.dataGroup.style.position="relative";
this.plotArea.appendChild(this.dataGroup);
// clipping rects, what a fucking pain.
var bg=this.domNode.style.backgroundColor;
var r=document.createElement("v:rect");
r.setAttribute("fillcolor", bg);
r.setAttribute("stroked", "false");
r.style.position="absolute";
r.style.top=(-1*this.properties.padding.top)-1+"px";
r.style.left=(-1*this.properties.padding.left)+"px";
r.style.width=(this.properties.width-3)+"px";
r.style.height=(this.properties.padding.top)-2+"px";
this.vectorNode.appendChild(r);
r=document.createElement("v:rect");
r.setAttribute("fillcolor", bg);
r.setAttribute("stroked", "false");
r.style.position="absolute";
r.style.top=plotHeight-2+"px";
r.style.left=(-1*this.properties.padding.left)+"px";
r.style.width=(this.properties.width-3)+"px";
r.style.height=(this.properties.padding.bottom)-2+"px"; // fixme: check this.
this.vectorNode.appendChild(r);
r=document.createElement("v:rect");
r.setAttribute("fillcolor", bg);
r.setAttribute("stroked", "false");
r.style.position="absolute";
r.style.top="-2px";
r.style.left=(-1*this.properties.padding.left)+"px";
r.style.width=(this.properties.padding.left-1)+"px";
r.style.height=plotHeight+"px";
this.vectorNode.appendChild(r);
r=document.createElement("v:rect");
r.setAttribute("fillcolor", bg);
r.setAttribute("stroked", "false");
r.style.position="absolute";
r.style.top="-2px";
r.style.right=(-1*this.properties.padding.right)+1+"px";
r.style.width=(this.properties.padding.right-1)+"px";
r.style.height=plotHeight+"px";
this.vectorNode.appendChild(r);
// end clipping rects. god that sucks, i wish VML had clipping outside of that crap vmlframe...
this.axisGroup=document.createElement("div");
this.axisGroup.style.position="relative";
this.plotArea.appendChild(this.axisGroup);
var stroke=1;
// x axis
var line=document.createElement("v:line");
var y=dojo.widget.vml.Chart.Plotter.getY(this.properties.axes.x.plotAt, this);
line.setAttribute("from", this.properties.padding.left-stroke + "," + y);
line.setAttribute("to", plotWidth + "," + y);
line.style.position="absolute";
line.style.antialias="false";
line.setAttribute("strokecolor", "#666");
line.setAttribute("strokeweight", stroke*2+"px");
this.axisGroup.appendChild(line);
// y axis
var line=document.createElement("v:line");
var y=dojo.widget.vml.Chart.Plotter.getX(this.properties.axes.y.plotAt, this);
line.setAttribute("from", y+","+this.properties.padding.top);
line.setAttribute("to", y+","+this.properties.height-this.properties.padding.bottom);
line.style.position="absolute";
line.style.antialias="false";
line.setAttribute("strokecolor", "#666");
line.setAttribute("strokeweight", stroke*2+"px");
this.axisGroup.appendChild(line);
// labels
var size=10;
// x axis labels.
var t=document.createElement("div");
t.style.position="absolute";
t.style.top=(this.properties.height-this.properties.padding.bottom+size+2)+"px";
t.style.left=this.properties.padding.left+"px";
t.style.fontFamily="sans-serif";
t.style.fontSize=size+"px";
t.innerHTML=dojo.math.round(parseFloat(this.properties.axes.x.range.min),2);
this.axisGroup.appendChild(t);
t=document.createElement("div");
t.style.position="absolute";
t.style.top=(this.properties.height-this.properties.padding.bottom+size+2)+"px";
t.style.left=(this.properties.width-this.properties.padding.right-(size/2))+"px";
t.style.fontFamily="sans-serif";
t.style.fontSize=size+"px";
t.innerHTML=dojo.math.round(parseFloat(this.properties.axes.x.range.max),2);
this.axisGroup.appendChild(t);
// y axis labels.
t=document.createElement("div");
t.style.position="absolute";
t.style.top=-1*(size/2)+"px";
t.style.right=(plotWidth+4)+"px";
t.style.fontFamily="sans-serif";
t.style.fontSize=size+"px";
t.innerHTML=dojo.math.round(parseFloat(this.properties.axes.y.range.max),2);
this.axisGroup.appendChild(t);
t=document.createElement("div");
t.style.position="absolute";
t.style.top=(this.properties.height-this.properties.padding.bottom)+"px";
t.style.right=(plotWidth+4)+"px";
t.style.fontFamily="sans-serif";
t.style.fontSize=size+"px";
t.innerHTML=dojo.math.round(parseFloat(this.properties.axes.y.range.min),2);
this.axisGroup.appendChild(t);
// this is last.
this.assignColors();
this._isInitialized=true;
},
destroy:function(){
while(this.domNode.childNodes.length>0){
this.domNode.removeChild(this.domNode.childNodes[0]);
}
this.vectorNode=this.plotArea=this.dataGroup=this.axisGroup=null;
},
render:function(){
if (this.dataGroup){
while(this.dataGroup.childNodes.length>0){
this.dataGroup.removeChild(this.dataGroup.childNodes[0]);
}
} else {
this.initialize();
}
for(var i=0; i<this.series.length; i++){
dojo.widget.vml.Chart.Plotter.plot(this.series[i], this);
}
}
});
dojo.widget.vml.Chart.Plotter=new function(){
var _this=this;
var plotters = {};
var types=dojo.widget.Chart.PlotTypes;
this.getX=function(value, chart){
var v=parseFloat(value);
var min=chart.properties.axes.x.range.min;
var max=chart.properties.axes.x.range.max;
var ofst=0-min;
min+=ofst; max+=ofst; v+=ofst;
var xmin=chart.properties.padding.left;
var xmax=chart.properties.width-chart.properties.padding.right;
var x=(v*((xmax-xmin)/max))+xmin;
return x;
};
this.getY=function(value, chart){
var v=parseFloat(value);
var max=chart.properties.axes.y.range.max;
var min=chart.properties.axes.y.range.min;
var ofst=0;
if(min<0)ofst+=Math.abs(min);
min+=ofst; max+=ofst; v+=ofst;
var ymin=chart.properties.height-chart.properties.padding.bottom;
var ymax=chart.properties.padding.top;
var y=(((ymin-ymax)/(max-min))*(max-v))+ymax;
return y;
};
this.addPlotter=function(name, func){
plotters[name]=func;
};
this.plot=function(series, chart){
if (series.values.length==0) return;
if (series.plotType && plotters[series.plotType]){
return plotters[series.plotType](series, chart);
}
else if (chart.plotType && plotters[chart.plotType]){
return plotters[chart.plotType](series, chart);
}
};
// plotting
plotters[types.Bar]=function(series, chart){
var space=1;
var lastW = 0;
for (var i=0; i<series.values.length; i++){
var x=_this.getX(series.values[i].x, chart);
var w;
if (i==series.values.length-1){
w=lastW;
} else{
w=_this.getX(series.values[i+1].x, chart)-x-space;
lastW=w;
}
x-=(w/2);
var yA=_this.getY(chart.properties.axes.x.plotAt, chart);
var y=_this.getY(series.values[i].value, chart);
var h=Math.abs(yA-y);
if (parseFloat(series.values[i].value)<chart.properties.axes.x.plotAt){
var oy=yA;
yA=y;
y=oy;
}
var bar=document.createElement("v:rect");
bar.style.position="absolute";
bar.style.top=x+"px";
bar.style.left=y+"px";
bar.style.width=w+"px";
bar.style.height=h+"px";
bar.setAttribute("fillColor", series.color);
bar.setAttribute("title", series.label + ": " + series.values[i].value);
bar.setAttribute("coordsize", chart.properties.width + "," + chart.properties.height);
var fill=document.createElement("v:fill");
fill.setAttribute("opacity", "0.9");
bar.appendChild(fill);
chart.dataGroup.appendChild(bar);
}
};
plotters[types.Line]=function(series, chart){
var tension=3;
var line=document.createElement("v:shape");
line.setAttribute("strokeweight", "2px");
line.setAttribute("strokecolor", series.color);
line.setAttribute("fillcolor", "none");
line.setAttribute("filled", "false");
line.setAttribute("title", series.label);
line.setAttribute("coordsize", chart.properties.width + "," + chart.properties.height);
line.style.position="absolute";
line.style.top="0px";
line.style.left="0px";
line.style.width= chart.properties.width+"px";
line.style.height=chart.properties.height+"px";
var stroke=document.createElement("v:stroke");
stroke.setAttribute("opacity", "0.85");
line.appendChild(stroke);
var path = [];
for (var i=0; i<series.values.length; i++){
var x = _this.getX(series.values[i].x, chart)
var y = _this.getY(series.values[i].value, chart);
if (i==0){
path.push("m");
path.push(x+","+y);
}else{
var lastx=_this.getX(series.values[i-1].x, chart);
var lasty=_this.getY(series.values[i-1].value, chart);
var dx=x-lastx;
path.push("v");
var cx=x-(tension-1)*(dx/tension);
path.push(cx+",0");
cx=x-(dx/tension);
path.push(cx+","+y-lasty);
path.push(dx, y-lasty);
}
}
line.setAttribute("path", path.join(" ")+" e");
chart.dataGroup.appendChild(line);
};
plotters[types.Scatter]=function(series, chart){
var r=8;
for (var i=0; i<series.values.length; i++){
var x=_this.getX(series.values[i].x, chart);
var y=_this.getY(series.values[i].value, chart);
var mod=r/2;
var point=document.createElement("v:rect");
point.setAttribute("fillcolor", series.color);
point.setAttribute("strokecolor", series.color);
point.setAttribute("title", series.label + ": " + series.values[i].value);
point.style.position="absolute";
point.style.rotation="45";
point.style.top=(y-mod)+"px";
point.style.left=(x-mod)+"px";
point.style.width=r+"px";
point.style.height=r+"px";
var fill=document.createElement("v:fill");
fill.setAttribute("opacity", "0.5");
point.appendChild(fill);
chart.dataGroup.appendChild(point);
}
};
plotters[types.Bubble]=function(series, chart){
// added param for series[n].value: size
var minR=1;
// do this off the x axis?
var min=chart.properties.axes.x.range.min;
var max=chart.properties.axes.x.range.max;
var ofst=0-min;
min+=ofst; max+=ofst;
var xmin=chart.properties.padding.left;
var xmax=chart.properties.width-chart.properties.padding.right;
var factor=(max-min)/(xmax-xmin)*25;
for (var i=0; i<series.values.length; i++){
var size = series.values[i].size;
if (isNaN(parseFloat(size))) size=minR;
var mod=(parseFloat(size)*factor)/2;
var point=document.createElement("v:oval");
point.setAttribute("strokecolor", series.color);
point.setAttribute("fillcolor", series.color);
point.setAttribute("title", series.label + ": " + series.values[i].value + " (" + size + ")");
point.style.position="absolute";
point.style.top=(_this.getY(series.values[i].value, chart)-mod) + "px";
point.style.left=(_this.getX(series.values[i].x, chart)-mod) + "px";
point.style.width=mod+"px";
point.style.height=mod+"px";
chart.dataGroup.appendChild(point);
}
};
}();
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