plot.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.charting.Plot");
dojo.require("dojo.lang.common");
dojo.require("dojo.charting.Axis");
dojo.require("dojo.charting.Series");
dojo.charting.RenderPlotSeries = {Singly:"single", Grouped:"grouped"};
dojo.charting.Plot = function (xaxis, yaxis, series) {
	var id = "dojo-charting-plot-" + dojo.charting.Plot.count++;
	this.getId = function () {
		return id;
	};
	this.setId = function (key) {
		id = key;
	};
	this.axisX = null;
	this.axisY = null;
	this.series = [];
	this.dataNode = null;
	this.renderType = dojo.charting.RenderPlotSeries.Singly;
	if (xaxis) {
		this.setAxis(xaxis, "x");
	}
	if (yaxis) {
		this.setAxis(yaxis, "y");
	}
	if (series) {
		for (var i = 0; i < series.length; i++) {
			this.addSeries(series[i]);
		}
	}
};
dojo.charting.Plot.count = 0;
dojo.extend(dojo.charting.Plot, {addSeries:function (series, plotter) {
	if (series.plotter) {
		this.series.push(series);
	} else {
		this.series.push({data:series, plotter:plotter || dojo.charting.Plotters["Default"]});
	}
}, setAxis:function (axis, which) {
	if (which.toLowerCase() == "x") {
		this.axisX = axis;
	} else {
		if (which.toLowerCase() == "y") {
			this.axisY = axis;
		}
	}
}, getRanges:function () {
	var xmin, xmax, ymin, ymax;
	xmin = ymin = Number.MAX_VALUE;
	xmax = ymax = Number.MIN_VALUE;
	for (var i = 0; i < this.series.length; i++) {
		var values = this.series[i].data.evaluate();
		for (var j = 0; j < values.length; j++) {
			var comp = values[j];
			xmin = Math.min(comp.x, xmin);
			ymin = Math.min(comp.y, ymin);
			xmax = Math.max(comp.x, xmax);
			ymax = Math.max(comp.y, ymax);
		}
	}
	return {x:{upper:xmax, lower:xmin}, y:{upper:ymax, lower:ymin}, toString:function () {
		return "[ x:" + xmax + " - " + xmin + ", y:" + ymax + " - " + ymin + "]";
	}};
}, destroy:function () {
	var node = this.dataNode;
	while (node && node.childNodes && node.childNodes.length > 0) {
		node.removeChild(node.childNodes[0]);
	}
	this.dataNode = null;
}});