@swimlane/ngx-charts
Version:
Declarative Charting Framework for Angular
40 lines • 5.49 kB
JavaScript
import { scaleLinear, scalePoint, scaleTime } from 'd3-scale';
import { ScaleType } from '../common/types/scale-type.enum';
export function getDomain(values, scaleType, autoScale, minVal, maxVal) {
let domain = [];
if (scaleType === ScaleType.Linear) {
values = values.map(v => Number(v));
if (!autoScale) {
values.push(0);
}
}
if (scaleType === ScaleType.Time || scaleType === ScaleType.Linear) {
const min = minVal ? minVal : Math.min(...values);
const max = maxVal ? maxVal : Math.max(...values);
domain = [min, max];
}
else {
domain = values;
}
return domain;
}
export function getScale(domain, range, scaleType, roundDomains) {
switch (scaleType) {
case ScaleType.Time:
return scaleTime().range(range).domain(domain);
case ScaleType.Linear: {
const scale = scaleLinear().range(range).domain(domain);
if (roundDomains) {
return scale.nice();
}
return scale;
}
case ScaleType.Ordinal:
return scalePoint()
.range([range[0], range[1]])
.domain(domain.map(r => r.toString()));
default:
return undefined;
}
}
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