chart.js

初学者

/*
	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 () {
	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, 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 (node) {
	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 (table) {
	if (table.getAttribute("axisAt")) {
		var p = table.getAttribute("axisAt");
		if (p.indexOf(",") > -1) {
			p = p.split(",");
		} else {
			p = p.split(" ");
		}
		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;
				}
			}
		}
		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 () {
	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 () {
	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);
	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 () {
	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 () {
	dojo.svg.g.suspend();
	if (this.axisGroup) {
		this.axisGroup.parentNode.removeChild(this.axisGroup);
		this.axisGroup = null;
	}
	this.axisGroup = document.createElementNS(dojo.svg.xmlns.svg, "g");
	this.plotArea.appendChild(this.axisGroup);
	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);
	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);
	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);
	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 () {
	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;
		}
	}
	this.drawVectorNode();