Struts example source code file (Chart.js)

This example Struts source code file (Chart.js) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Struts tags/keywords

dataseries, dataseries

The Struts Chart.js source code

/*
	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.Chart");
dojo.require("dojo.widget.*");
dojo.require("dojo.gfx.color");
dojo.require("dojo.gfx.color.hsl");
dojo.declare("dojo.widget.Chart", null, function () {
	this.series = [];
}, {isContainer:false, assignColors:function () {
	var hue = 30;
	var sat = 120;
	var lum = 120;
	var steps = Math.round(330 / this.series.length);
	for (var i = 0; i < this.series.length; i++) {
		var c = dojo.gfx.color.hsl2rgb(hue, sat, lum);
		if (!this.series[i].color) {
			this.series[i].color = dojo.gfx.color.rgb2hex(c[0], c[1], c[2]);
		}
		hue += steps;
	}
}, parseData:function (table) {
	var thead = table.getElementsByTagName("thead")[0];
	var tbody = table.getElementsByTagName("tbody")[0];
	if (!(thead && tbody)) {
		dojo.raise("dojo.widget.Chart: supplied table must define a head and a body.");
	}
	var columns = thead.getElementsByTagName("tr")[0].getElementsByTagName("th");
	for (var i = 1; i < columns.length; i++) {
		var key = "column" + i;
		var label = columns[i].innerHTML;
		var plotType = columns[i].getAttribute("plotType") || "line";
		var color = columns[i].getAttribute("color");
		var ds = new dojo.widget.Chart.DataSeries(key, label, plotType, color);
		this.series.push(ds);
	}
	var rows = tbody.rows;
	var xMin = Number.MAX_VALUE, xMax = Number.MIN_VALUE;
	var yMin = Number.MAX_VALUE, yMax = Number.MIN_VALUE;
	var ignore = ["accesskey", "align", "bgcolor", "class", "colspan", "height", "id", "nowrap", "rowspan", "style", "tabindex", "title", "valign", "width"];
	for (var i = 0; i < rows.length; i++) {
		var row = rows[i];
		var cells = row.cells;
		var x = Number.MIN_VALUE;
		for (var j = 0; j < cells.length; j++) {
			if (j == 0) {
				x = parseFloat(cells[j].innerHTML);
				xMin = Math.min(xMin, x);
				xMax = Math.max(xMax, x);
			} else {
				var ds = this.series[j - 1];
				var y = parseFloat(cells[j].innerHTML);
				yMin = Math.min(yMin, y);
				yMax = Math.max(yMax, y);
				var o = {x:x, value:y};
				var attrs = cells[j].attributes;
				for (var k = 0; k < attrs.length; k++) {
					var attr = attrs.item(k);
					var bIgnore = false;
					for (var l = 0; l < ignore.length; l++) {
						if (attr.nodeName.toLowerCase() == ignore[l]) {
							bIgnore = true;
							break;
						}
					}
					if (!bIgnore) {
						o[attr.nodeName] = attr.nodeValue;
					}
				}
				ds.add(o);
			}
		}
	}
	return {x:{min:xMin, max:xMax}, y:{min:yMin, max:yMax}};
}});
dojo.declare("dojo.widget.Chart.DataSeries", null, function (key, label, plotType, color) {
	this.id = "DataSeries" + dojo.widget.Chart.DataSeries.count++;
	this.key = key;
	this.label = label || this.id;
	this.plotType = plotType || "line";
	this.color = color;
	this.values = [];
}, {add:function (v) {
	if (v.x == null || v.value == null) {
		dojo.raise("dojo.widget.Chart.DataSeries.add: v must have both an 'x' and 'value' property.");
	}
	this.values.push(v);
}, clear:function () {
	this.values = [];
}, createRange:function (len) {
	var idx = this.values.length - 1;
	var length = (len || this.values.length);
	return {"index":idx, "length":length, "start":Math.max(idx - length, 0)};
}, getMean:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var t = 0;
	var c = 0;
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			t += n;
			c++;
		}
	}
	t /= Math.max(c, 1);
	return t;
}, getMovingAverage:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var t = 0;
	var c = 0;
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			t += n;
			c++;
		}
	}
	t /= Math.max(c, 1);
	return t;
}, getVariance:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var t = 0;
	var s = 0;
	var c = 0;
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			t += n;
			s += Math.pow(n, 2);
			c++;
		}
	}
	return (s / c) - Math.pow(t / c, 2);
}, getStandardDeviation:function (len) {
	return Math.sqrt(this.getVariance(len));
}, getMax:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var t = 0;
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			t = Math.max(n, t);
		}
	}
	return t;
}, getMin:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var t = 0;
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			t = Math.min(n, t);
		}
	}
	return t;
}, getMedian:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var a = [];
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			var b = false;
			for (var j = 0; j < a.length && !b; j++) {
				if (n == a[j]) {
					b = true;
				}
			}
			if (!b) {
				a.push(n);
			}
		}
	}
	a.sort();
	if (a.length > 0) {
		return a[Math.ceil(a.length / 2)];
	}
	return 0;
}, getMode:function (len) {
	var range = this.createRange(len);
	if (range.index < 0) {
		return 0;
	}
	var o = {};
	var ret = 0;
	var m = 0;
	for (var i = range.index; i >= range.start; i--) {
		var n = parseFloat(this.values[i].value);
		if (!isNaN(n)) {
			if (!o[this.values[i].value]) {
				o[this.values[i].value] = 1;
			} else {
				o[this.values[i].value]++;
			}
		}
	}
	for (var p in o) {
		if (m < o[p]) {
			m = o[p];
			ret = p;
		}
	}
	return parseFloat(ret);
}});
dojo.requireIf(dojo.render.svg.capable, "dojo.widget.svg.Chart");
dojo.requireIf(!dojo.render.svg.capable && dojo.render.vml.capable, "dojo.widget.vml.Chart");