devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
47 lines (46 loc) • 2.11 kB
JavaScript
/**
* DevExtreme (esm/viz/translators/logarithmic_translator.js)
* Version: 23.2.6
* Build date: Wed May 01 2024
*
* Copyright (c) 2012 - 2024 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import {
raiseToExt as raiseTo,
getLogExt as getLog
} from "../core/utils";
import {
isDefined
} from "../../core/utils/type";
export default {
fromValue: function(value) {
return null !== value ? getLog(value, this._canvasOptions.base, this._businessRange.allowNegatives, this._businessRange.linearThreshold) : value
},
toValue: function(value) {
return null !== value ? raiseTo(value, this._canvasOptions.base, this._businessRange.allowNegatives, this._businessRange.linearThreshold) : value
},
getMinBarSize: function(minBarSize) {
var visibleArea = this.getCanvasVisibleArea();
var minValue = this.from(visibleArea.min + minBarSize);
var canvasOptions = this._canvasOptions;
var startValue = this.fromValue(this.from(visibleArea.min));
var endValue = this.fromValue(null !== minValue && void 0 !== minValue ? minValue : this.from(visibleArea.max));
var value = Math.abs(startValue - endValue);
return Math.pow(canvasOptions.base, value)
},
checkMinBarSize: function(initialValue, minShownValue, stackValue) {
var canvasOptions = this._canvasOptions;
var prevValue = stackValue ? stackValue - initialValue : 0;
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
}
};