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Fixes issue with ScaleLine

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Math.pow with negative exponents is inaccurate in chrome v74. `toFixed`
is called on the result to fix this.
This commit is contained in:
Kai Volland
2019-03-08 11:29:36 +01:00
parent b31715e86e
commit fcf6e81430
1 changed files with 5 additions and 5 deletions
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10
src/ol/control/ScaleLine.js
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@@ -260,10 +260,11 @@ class ScaleLine extends Control {
let i = 3 * Math.floor( let i = 3 * Math.floor(
Math.log(this.minWidth_ * pointResolution) / Math.log(10)); Math.log(this.minWidth_ * pointResolution) / Math.log(10));
let count, width; let count, width, decimalCount;
while (true) { while (true) {
count = LEADING_DIGITS[((i % 3) + 3) % 3] * decimalCount = Math.floor(i / 3);
Math.pow(10, Math.floor(i / 3)); const decimal = Math.pow(10, decimalCount);
count = LEADING_DIGITS[((i % 3) + 3) % 3] * decimal;
width = Math.round(count / pointResolution); width = Math.round(count / pointResolution);
if (isNaN(width)) { if (isNaN(width)) {
this.element.style.display = 'none'; this.element.style.display = 'none';
@@ -274,12 +275,11 @@ class ScaleLine extends Control {
} }
++i; ++i;
} }
let html; let html;
if (this.scaleBar_) { if (this.scaleBar_) {
html = this.createScaleBar(width, count, suffix); html = this.createScaleBar(width, count, suffix);
} else { } else {
html = count + ' ' + suffix; html = count.toFixed(decimalCount < 0 ? -decimalCount : 0) + ' ' + suffix;
} }
if (this.renderedHTML_ != html) { if (this.renderedHTML_ != html) {