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refactor: drawScaleBar

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Azgaar 2024-09-05 21:38:25 +02:00
parent d41928e0f5
commit e58cda2a5d
4 changed files with 125 additions and 124 deletions
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27
modules/renderers/draw-scalebar.js
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@ -1,24 +1,12 @@
"use strict";
function drawScaleBar(scaleBar, scaleLevel) {
TIME && console.time("drawScaleBar");
if (!scaleBar.size() || scaleBar.style("display") === "none") return;
const unit = distanceUnitInput.value;
const size = +scaleBar.attr("data-bar-size");
const length = (function () {
const init = 100;
let val = (init * size * distanceScale) / scaleLevel; // bar length in distance unit
if (val > 900) val = rn(val, -3); // round to 1000
else if (val > 90) val = rn(val, -2); // round to 100
else if (val > 9) val = rn(val, -1); // round to 10
else val = rn(val); // round to 1
const length = (val * scaleLevel) / distanceScale; // actual length in pixels on this scale
return length;
})();
const length = getLength(scaleLevel, size);
scaleBar.select("#scaleBarContent").remove(); // redraw content every time
const content = scaleBar.append("g").attr("id", "scaleBarContent");
@ -85,8 +73,19 @@ function drawScaleBar(scaleBar, scaleLevel) {
.attr("width", bbox.width + paddingRight)
.attr("height", bbox.height + paddingBottom);
}
}
TIME && console.timeEnd("drawScaleBar");
function getLength(scaleLevel) {
const init = 100;
const size = +scaleBar.attr("data-bar-size");
let val = (init * size * distanceScale) / scaleLevel; // bar length in distance unit
if (val > 900) val = rn(val, -3); // round to 1000
else if (val > 90) val = rn(val, -2); // round to 100
else if (val > 9) val = rn(val, -1); // round to 10
else val = rn(val); // round to 1
const length = (val * scaleLevel) / distanceScale; // actual length in pixels on this scale
return length;
}
function fitScaleBar(scaleBar, fullWidth, fullHeight) {