chart.js

dojo-0.4.0-ajax.zip ajax一个应用。在页面上可以直接用标签。此为ajax的框架

/*
	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.layout");
dojo.require("dojo.gfx.color");

dojo.widget.defineWidget(
	"dojo.widget.vml.Chart",
	[dojo.widget.HtmlWidget, dojo.widget.Chart],
	function(){
		//	summary
		//	initializes the VML version of Chart.
		this.templatePath=null;
		this.templateCssPath=null;
		this._isInitialize=false;
		this.hasData=false;
		this.vectorNode=null;
		this.plotArea=null;
		this.dataGroup=null;
		this.axisGroup=null;
		this.properties={
			height:0,	//	defaults, will resize to the domNode.
			width:0,
			defaultWidth:600,
			defaultHeight:400,
			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
					}
				}
			}
		};
	},
{
	parseProperties:function(/* HTMLElement */node){
		//	summary
		//	Parse the properties off the main tag
		var bRangeX=false;
		var bRangeY=false;
		if (node.getAttribute("width")){ 
			this.properties.width=node.getAttribute("width");
		}
		if (node.getAttribute("height")){
			this.properties.height=node.getAttribute("height");
		}
		if (node.getAttribute("plotType")){
			this.properties.plotType=node.getAttribute("plotType");
		}
		if (node.getAttribute("padding")){
			if (node.getAttribute("padding").indexOf(",") > -1)
				var p=node.getAttribute("padding").split(","); 
			else var p=node.getAttribute("padding").split(" ");
			if (p.length==1){
				var pad=parseFloat(p[0]);
				this.properties.padding.top=pad;
				this.properties.padding.right=pad;
				this.properties.padding.bottom=pad;
				this.properties.padding.left=pad;
			} else if(p.length==2){
				var padV=parseFloat(p[0]);
				var padH=parseFloat(p[1]);
				this.properties.padding.top=padV;
				this.properties.padding.right=padH;
				this.properties.padding.bottom=padV;
				this.properties.padding.left=padH;
			} else if(p.length==4){
				this.properties.padding.top=parseFloat(p[0]);
				this.properties.padding.right=parseFloat(p[1]);
				this.properties.padding.bottom=parseFloat(p[2]);
				this.properties.padding.left=parseFloat(p[3]);
			}
		}
		if (node.getAttribute("rangeX")){
			var p=node.getAttribute("rangeX");
			if (p.indexOf(",")>-1) p=p.split(",");
			else p=p.split(" ");
			this.properties.axes.x.range.min=parseFloat(p[0]);
			this.properties.axes.x.range.max=parseFloat(p[1]);
			bRangeX=true;
		}
		if (node.getAttribute("rangeY")){
			var p=node.getAttribute("rangeY");
			if (p.indexOf(",")>-1) p=p.split(",");
			else p=p.split(" ");
			this.properties.axes.y.range.min=parseFloat(p[0]);
			this.properties.axes.y.range.max=parseFloat(p[1]);
			bRangeY=true;
		}
		return { rangeX:bRangeX, rangeY:bRangeY };
	},
	setAxesPlot:function(/* HTMLElement */table){
		//	summary
		//	figure out where to plot the axes
		if (table.getAttribute("axisAt")){
			var p=table.getAttribute("axisAt");
			if (p.indexOf(",")>-1) p=p.split(",");
			else p=p.split(" ");
			
			//	x axis
			if (!isNaN(parseFloat(p[0]))){
				this.properties.axes.x.plotAt=parseFloat(p[0]);
			} else if (p[0].toLowerCase()=="ymin"){
				this.properties.axes.x.plotAt=this.properties.axes.y.range.min;
			} else if (p[0].toLowerCase()=="ymax"){
				this.properties.axes.x.plotAt=this.properties.axes.y.range.max;
			}

			// y axis
			if (!isNaN(parseFloat(p[1]))){
				this.properties.axes.y.plotAt=parseFloat(p[1]);
			} else if (p[1].toLowerCase()=="xmin"){
				this.properties.axes.y.plotAt=this.properties.axes.x.range.min;
			} else if (p[1].toLowerCase()=="xmax"){
				this.properties.axes.y.plotAt=this.properties.axes.x.range.max;
			}
		} else {
			this.properties.axes.x.plotAt=this.properties.axes.y.range.min;
			this.properties.axes.y.plotAt=this.properties.axes.x.range.min;
		}
	},
	drawVectorNode:function(){
		//	summary
		//	Draws the main canvas for the chart
		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);
	},
	drawPlotArea:function(){
		//	summary
		//	Draws the plot area for the chart
		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;

		if(this.plotArea){
			this.plotArea.parentNode.removeChild(this.plotArea);
			this.plotArea=null;
		}
		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.plotArea.style.clip="rect(0 "+plotWidth+" "+plotHeight+" 0)";
		this.vectorNode.appendChild(this.plotArea);
	},
	drawDataGroup:function(){
		//	summary
		//	Draws the data group for the chart
		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;

		if(this.dataGroup){
			this.dataGroup.parentNode.removeChild(this.dataGroup);
			this.dataGroup=null;
		}
		this.dataGroup=document.createElement("div");
		this.dataGroup.style.position="absolute";
		this.dataGroup.setAttribute("title", "Data Group");
		this.dataGroup.style.top="0px";
		this.dataGroup.style.left="0px";
		this.dataGroup.style.width=plotWidth+"px";
		this.dataGroup.style.height=plotHeight+"px";
		this.plotArea.appendChild(this.dataGroup);
	},
	drawAxes:function(){
		//	summary
		//	Draws the axes for the chart
		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;

		if(this.axisGroup){
			this.axisGroup.parentNode.removeChild(this.axisGroup);
			this.axisGroup=null;
		}
		this.axisGroup=document.createElement("div");
		this.axisGroup.style.position="absolute";
		this.axisGroup.setAttribute("title", "Axis Group");
		this.axisGroup.style.top="0px";
		this.axisGroup.style.left="0px";
		this.axisGroup.style.width=plotWidth+"px";
		this.axisGroup.style.height=plotHeight+"px";
		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", "0px,"+y+"px");
		line.setAttribute("to", plotWidth+"px,"+y+"px");
		line.style.position="absolute";
		line.style.top="0px";
		line.style.left="0px";
		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 x=dojo.widget.vml.Chart.Plotter.getX(this.properties.axes.y.plotAt, this);
		line.setAttribute("from", x+"px,0px");
		line.setAttribute("to", x+"px,"+plotHeight+"px");
		line.style.position="absolute";
		line.style.top="0px";
		line.style.left="0px";
		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)+"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.vectorNode.appendChild(t);

		t=document.createElement("div");
		t.style.position="absolute";
		t.style.top=(this.properties.height-this.properties.padding.bottom)+"px";
		t.style.left=(this.properties.width-this.properties.padding.right-size)+"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.vectorNode.appendChild(t);

		//	y axis labels.
		t=document.createElement("div");
		t.style.position="absolute";
		t.style.top=(size/2)+"px";
		t.style.left="0px";
		t.style.width=this.properties.padding.left + "px";
		t.style.textAlign="right";
		t.style.paddingRight="4px";
		t.style.fontFamily="sans-serif";
		t.style.fontSize=size+"px";
		t.innerHTML=dojo.math.round(parseFloat(this.properties.axes.y.range.max),2);
		this.vectorNode.appendChild(t);
		
		t=document.createElement("div");
		t.style.position="absolute";
		t.style.top=(this.properties.height-this.properties.padding.bottom-size)+"px";
		t.style.left="0px";
		t.style.width=this.properties.padding.left + "px";
		t.style.textAlign="right";
		t.style.paddingRight="4px";
		t.style.fontFamily="sans-serif";
		t.style.fontSize=size+"px";
		t.innerHTML=dojo.math.round(parseFloat(this.properties.axes.y.range.min),2);
		this.vectorNode.appendChild(t);
	},
	
	init:function(){
		//	summary
		//	Initialize the chart
		if(!this.properties.width || !this.properties.height){
			var box=dojo.html.getContentBox(this.domNode);
			if(!this.properties.width){
				this.properties.width=(box.width<32)?this.properties.defaultWidth:box.width;
			}
			if(!this.properties.height){
				this.properties.height=(box.height<32)?this.properties.defaultHeight:box.height;
			}
		}

		//	set up the chart; each is a method so that it can be selectively overridden.
		this.drawVectorNode();
		this.drawPlotArea();
		this.drawDataGroup();
		this.drawAxes();

		//	this is last.