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