@quartic/bokehjs/build/js/tree_ts/models/formatters/log_tick_formatter.ts

Interactive, novel data visualization

var extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
  hasProp = {}.hasOwnProperty;

import {
  BasicTickFormatter
} from "./basic_tick_formatter";

import {
  TickFormatter
} from "./tick_formatter";

import {
  logger
} from "core/logging";

import * as p from "core/properties";

export var LogTickFormatter = (function(superClass) {
  extend(LogTickFormatter, superClass);

  function LogTickFormatter() {
    return LogTickFormatter.__super__.constructor.apply(this, arguments);
  }

  LogTickFormatter.prototype.type = 'LogTickFormatter';

  LogTickFormatter.define({
    ticker: [p.Instance, null]
  });

  LogTickFormatter.prototype.initialize = function(attrs, options) {
    LogTickFormatter.__super__.initialize.call(this, attrs, options);
    this.basic_formatter = new BasicTickFormatter();
    if (this.ticker == null) {
      return logger.warn("LogTickFormatter not configured with a ticker, using default base of 10 (labels will be incorrect if ticker base is not 10)");
    }
  };

  LogTickFormatter.prototype.doFormat = function(ticks, loc) {
    var base, i, j, labels, ref, small_interval;
    if (ticks.length === 0) {
      return [];
    }
    if (this.ticker != null) {
      base = this.ticker.base;
    } else {
      base = 10;
    }
    small_interval = false;
    labels = new Array(ticks.length);
    for (i = j = 0, ref = ticks.length; 0 <= ref ? j < ref : j > ref; i = 0 <= ref ? ++j : --j) {
      labels[i] = base + "^" + (Math.round(Math.log(ticks[i]) / Math.log(base)));
      if ((i > 0) && (labels[i] === labels[i - 1])) {
        small_interval = true;
        break;
      }
    }
    if (small_interval) {
      labels = this.basic_formatter.doFormat(ticks);
    }
    return labels;
  };

  return LogTickFormatter;

})(TickFormatter);