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.svg.Chart");

dojo.require("dojo.widget.HtmlWidget");
dojo.require("dojo.widget.Chart");
dojo.require("dojo.html.layout");
dojo.require("dojo.math");
dojo.require("dojo.svg");
dojo.require("dojo.gfx.color");

dojo.require("dojo.json");

dojo.widget.defineWidget(
	"dojo.widget.svg.Chart",
	[dojo.widget.HtmlWidget, dojo.widget.Chart],
	function(){
		//	summary
		//	initializes the SVG 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
			dojo.svg.g.suspend();		
			if(this.vectorNode) this.destroy();
			this.vectorNode=document.createElementNS(dojo.svg.xmlns.svg, "svg");
			this.vectorNode.setAttribute("width", this.properties.width);
			this.vectorNode.setAttribute("height", this.properties.height);
			dojo.svg.g.resume();
		},
		drawPlotArea:function(){
			//	summary
			//	Draws the plot area for the chart
			dojo.svg.g.suspend();		
			if(this.plotArea){
				this.plotArea.parentNode.removeChild(this.plotArea);
				this.plotArea=null;
			}
			var defs = document.createElementNS(dojo.svg.xmlns.svg, "defs");
			var clip = document.createElementNS(dojo.svg.xmlns.svg, "clipPath");
			clip.setAttribute("id","plotClip"+this.widgetId);
			var rect = document.createElementNS(dojo.svg.xmlns.svg, "rect");		
			rect.setAttribute("x", this.properties.padding.left);
			rect.setAttribute("y", this.properties.padding.top);
			rect.setAttribute("width", this.properties.width-this.properties.padding.left-this.properties.padding.right);
			rect.setAttribute("height", this.properties.height-this.properties.padding.top-this.properties.padding.bottom);
			clip.appendChild(rect);
			defs.appendChild(clip);
			this.vectorNode.appendChild(defs);

			//	the plot background.
			this.plotArea = document.createElementNS(dojo.svg.xmlns.svg, "g");
			this.vectorNode.appendChild(this.plotArea);
			var rect = document.createElementNS(dojo.svg.xmlns.svg, "rect");		
			rect.setAttribute("x", this.properties.padding.left);
			rect.setAttribute("y", this.properties.padding.top);
			rect.setAttribute("width", this.properties.width-this.properties.padding.left-this.properties.padding.right);
			rect.setAttribute("height", this.properties.height-this.properties.padding.top-this.properties.padding.bottom);
			rect.setAttribute("fill", "#fff");
			this.plotArea.appendChild(rect);
			dojo.svg.g.resume();
		},
		drawDataGroup:function(){
			//	summary
			//	Draws the data group for the chart
			dojo.svg.g.suspend();		
			if(this.dataGroup){
				this.dataGroup.parentNode.removeChild(this.dataGroup);
				this.dataGroup=null;
			}
			this.dataGroup = document.createElementNS(dojo.svg.xmlns.svg, "g");
			this.dataGroup.setAttribute("style","clip-path:url(#plotClip"+this.widgetId+");");
			this.plotArea.appendChild(this.dataGroup);
			dojo.svg.g.resume();
		},
		drawAxes:function(){
			//	summary
			//	Draws the axes for the chart
			dojo.svg.g.suspend();		
			if(this.axisGroup){
				this.axisGroup.parentNode.removeChild(this.axisGroup);
				this.axisGroup=null;
			}
			//	axis group
			this.axisGroup = document.createElementNS(dojo.svg.xmlns.svg, "g");
			this.plotArea.appendChild(this.axisGroup);

			//	x axis
			var stroke=1;
			var line = document.createElementNS(dojo.svg.xmlns.svg, "line");
			var y=dojo.widget.svg.Chart.Plotter.getY(this.properties.axes.x.plotAt, this);
			line.setAttribute("y1", y);
			line.setAttribute("y2", y);
			line.setAttribute("x1",this.properties.padding.left-stroke);
			line.setAttribute("x2",this.properties.width-this.properties.padding.right);
			line.setAttribute("style","stroke:#000;stroke-width:"+stroke+";");
			this.axisGroup.appendChild(line);
			
			//	x axis units.
			//	(min and max)
			var textSize=10;
			var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
			text.setAttribute("x", this.properties.padding.left);
			text.setAttribute("y", this.properties.height-this.properties.padding.bottom+textSize+2);
			text.setAttribute("style", "text-anchor:middle;font-size:"+textSize+"px;fill:#000;");
			text.appendChild(document.createTextNode(dojo.math.round(parseFloat(this.properties.axes.x.range.min),2)));
			this.axisGroup.appendChild(text);
			
			var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
			text.setAttribute("x", this.properties.width-this.properties.padding.right-(textSize/2));
			text.setAttribute("y", this.properties.height-this.properties.padding.bottom+textSize+2);
			text.setAttribute("style", "text-anchor:middle;font-size:"+textSize+"px;fill:#000;");
			text.appendChild(document.createTextNode(dojo.math.round(parseFloat(this.properties.axes.x.range.max),2)));
			this.axisGroup.appendChild(text);	
			
			//	y axis
			var line=document.createElementNS(dojo.svg.xmlns.svg, "line");
			var x=dojo.widget.svg.Chart.Plotter.getX(this.properties.axes.y.plotAt, this);
			line.setAttribute("x1", x);
			line.setAttribute("x2", x);
			line.setAttribute("y1", this.properties.padding.top);
			line.setAttribute("y2", this.properties.height-this.properties.padding.bottom);
			line.setAttribute("style", "stroke:#000;stroke-width:"+stroke+";");
			this.axisGroup.appendChild(line);

			//	y axis units
			var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
			text.setAttribute("x", this.properties.padding.left-4);
			text.setAttribute("y", this.properties.height-this.properties.padding.bottom);
			text.setAttribute("style", "text-anchor:end;font-size:"+textSize+"px;fill:#000;");
			text.appendChild(document.createTextNode(dojo.math.round(parseFloat(this.properties.axes.y.range.min),2)));
			this.axisGroup.appendChild(text);
			
			var text = document.createElementNS(dojo.svg.xmlns.svg, "text");
			text.setAttribute("x", this.properties.padding.left-4);
			text.setAttribute("y", this.properties.padding.top+(textSize/2));
			text.setAttribute("style", "text-anchor:end;font-size:"+textSize+"px;fill:#000;");
			text.appendChild(document.createTextNode(dojo.math.round(parseFloat(this.properties.axes.y.range.max),2)));
			this.axisGroup.appendChild(text);	
			dojo.svg.g.resume();
		},

		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;
				}
			}