-/**
- * @license
- * Copyright 2013 David Eberlein (david.eberlein@ch.sauter-bc.com)
- * MIT-licensed (http://opensource.org/licenses/MIT)
- */
-
-/**
- * @fileoverview DataHandler default implementation used for simple line charts.
- * @author David Eberlein (david.eberlein@ch.sauter-bc.com)
- */
-
-(function() {
-
-/*global Dygraph:false */
-"use strict";
-
-/**
- * @constructor
- * @extends Dygraph.DataHandler
- */
-Dygraph.DataHandlers.DefaultHandler = function() {
-};
-
-var DefaultHandler = Dygraph.DataHandlers.DefaultHandler;
-DefaultHandler.prototype = new Dygraph.DataHandler();
-
-/** @inheritDoc */
-DefaultHandler.prototype.extractSeries = function(rawData, i, options) {
- // TODO(danvk): pre-allocate series here.
- var series = [];
- var logScale = options.get('logscale');
- for ( var j = 0; j < rawData.length; j++) {
- var x = rawData[j][0];
- var point = rawData[j][i];
- if (logScale) {
- // On the log scale, points less than zero do not exist.
- // This will create a gap in the chart.
- if (point <= 0) {
- point = null;
- }
- }
- series.push([ x, point ]);
- }
- return series;
-};
-
-/** @inheritDoc */
-DefaultHandler.prototype.rollingAverage = function(originalData, rollPeriod,
- options) {
- rollPeriod = Math.min(rollPeriod, originalData.length);
- var rollingData = [];
-
- var i, j, y, sum, num_ok;
- // Calculate the rolling average for the first rollPeriod - 1 points
- // where
- // there is not enough data to roll over the full number of points
- if (rollPeriod == 1) {
- return originalData;
- }
- for (i = 0; i < originalData.length; i++) {
- sum = 0;
- num_ok = 0;
- for (j = Math.max(0, i - rollPeriod + 1); j < i + 1; j++) {
- y = originalData[j][1];
- if (y === null || isNaN(y))
- continue;
- num_ok++;
- sum += originalData[j][1];
- }
- if (num_ok) {
- rollingData[i] = [ originalData[i][0], sum / num_ok ];
- } else {
- rollingData[i] = [ originalData[i][0], null ];
- }
- }
-
- return rollingData;
-};
-
-/** @inheritDoc */
-DefaultHandler.prototype.getExtremeYValues = function(series, dateWindow,
- options) {
- var minY = null, maxY = null, y;
- var firstIdx = 0, lastIdx = series.length - 1;
-
- for ( var j = firstIdx; j <= lastIdx; j++) {
- y = series[j][1];
- if (y === null || isNaN(y))
- continue;
- if (maxY === null || y > maxY) {
- maxY = y;
- }
- if (minY === null || y < minY) {
- minY = y;
- }
- }
- return [ minY, maxY ];
-};
-
-})();