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alexandre_ |
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/*
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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.charting.Axis");
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dojo.require("dojo.lang.common");
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dojo.charting.Axis = function (label, scale, labels) {
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var id = "dojo-charting-axis-" + dojo.charting.Axis.count++;
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this.getId = function () {
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return id;
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};
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this.setId = function (key) {
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id = key;
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};
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this.scale = scale || "linear";
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this.label = label || "";
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this.showLabel = true;
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this.showLabels = true;
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this.showLines = false;
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this.showTicks = false;
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this.range = {upper:100, lower:0};
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this.origin = "min";
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this._origin = null;
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this.labels = labels || [];
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this._labels = [];
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this.nodes = {main:null, axis:null, label:null, labels:null, lines:null, ticks:null};
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this._rerender = false;
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};
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dojo.charting.Axis.count = 0;
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dojo.extend(dojo.charting.Axis, {getCoord:function (val, plotArea, plot) {
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val = parseFloat(val, 10);
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var area = plotArea.getArea();
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if (plot.axisX == this) {
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var offset = 0 - this.range.lower;
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var min = this.range.lower + offset;
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var max = this.range.upper + offset;
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val += offset;
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return (val * ((area.right - area.left) / max)) + area.left;
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} else {
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var max = this.range.upper;
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var min = this.range.lower;
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var offset = 0;
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if (min < 0) {
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offset += Math.abs(min);
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}
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max += offset;
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min += offset;
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val += offset;
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var pmin = area.bottom;
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var pmax = area.top;
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return (((pmin - pmax) / (max - min)) * (max - val)) + pmax;
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}
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}, initializeOrigin:function (drawAgainst, plane) {
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if (this._origin == null) {
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this._origin = this.origin;
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}
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if (isNaN(this._origin)) {
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if (this._origin.toLowerCase() == "max") {
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this.origin = drawAgainst.range[(plane == "y") ? "upper" : "lower"];
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} else {
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if (this._origin.toLowerCase() == "min") {
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this.origin = drawAgainst.range[(plane == "y") ? "lower" : "upper"];
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} else {
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this.origin = 0;
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}
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}
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}
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}, initializeLabels:function () {
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this._labels = [];
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if (this.labels.length == 0) {
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this.showLabels = false;
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this.showLines = false;
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this.showTicks = false;
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} else {
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if (this.labels[0].label && this.labels[0].value != null) {
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for (var i = 0; i < this.labels.length; i++) {
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this._labels.push(this.labels[i]);
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}
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} else {
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if (!isNaN(this.labels[0])) {
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for (var i = 0; i < this.labels.length; i++) {
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this._labels.push({label:this.labels[i], value:this.labels[i]});
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}
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} else {
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var a = [];
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for (var i = 0; i < this.labels.length; i++) {
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a.push(this.labels[i]);
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}
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var s = a.shift();
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this._labels.push({label:s, value:this.range.lower});
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if (a.length > 0) {
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var s = a.pop();
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this._labels.push({label:s, value:this.range.upper});
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}
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if (a.length > 0) {
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var range = this.range.upper - this.range.lower;
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var step = range / (this.labels.length - 1);
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for (var i = 1; i <= a.length; i++) {
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this._labels.push({label:a[i - 1], value:this.range.lower + (step * i)});
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}
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}
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}
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}
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}
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}, initialize:function (plotArea, plot, drawAgainst, plane) {
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this.destroy();
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this.initializeOrigin(drawAgainst, plane);
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this.initializeLabels();
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var node = this.render(plotArea, plot, drawAgainst, plane);
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return node;
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}, destroy:function () {
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for (var p in this.nodes) {
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while (this.nodes[p] && this.nodes[p].childNodes.length > 0) {
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this.nodes[p].removeChild(this.nodes[p].childNodes[0]);
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}
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if (this.nodes[p] && this.nodes[p].parentNode) {
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this.nodes[p].parentNode.removeChild(this.nodes[p]);
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}
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this.nodes[p] = null;
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}
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}});
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dojo.requireIf(dojo.render.svg.capable, "dojo.charting.svg.Axis");
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dojo.requireIf(dojo.render.vml.capable, "dojo.charting.vml.Axis");
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