/** * DevExtreme (viz/translators/logarithmic_translator.js) * Version: 19.1.16 * Build date: Tue Oct 18 2022 * * Copyright (c) 2012 - 2022 Developer Express Inc. ALL RIGHTS RESERVED * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/ */ "use strict"; var vizUtils = require("../core/utils"); var isDefined = require("../../core/utils/type").isDefined; var raiseTo = vizUtils.raiseTo; var getLog = vizUtils.getLog; module.exports = { _fromValue: function(value) { return null !== value ? getLog(value, this._canvasOptions.base) : value }, _toValue: function(value) { return null !== value ? raiseTo(value, this._canvasOptions.base) : value }, getMinBarSize: function(minBarSize) { var visibleArea = this.getCanvasVisibleArea(); var minValue = this.from(visibleArea.min + minBarSize); var canvasOptions = this._canvasOptions; return Math.pow(canvasOptions.base, canvasOptions.rangeMinVisible + this._fromValue(this.from(visibleArea.min)) - this._fromValue(!isDefined(minValue) ? this.from(visibleArea.max) : minValue)) }, checkMinBarSize: function(initialValue, minShownValue, stackValue) { var canvasOptions = this._canvasOptions; var prevValue = stackValue - initialValue; var baseMethod = this.constructor.prototype.checkMinBarSize; var minBarSize; var updateValue; if (isDefined(minShownValue) && prevValue > 0) { minBarSize = baseMethod(this._fromValue(stackValue / prevValue), this._fromValue(minShownValue) - canvasOptions.rangeMinVisible); updateValue = Math.pow(canvasOptions.base, this._fromValue(prevValue) + minBarSize) - prevValue } else { updateValue = baseMethod(initialValue, minShownValue) } return updateValue } };