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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | import { scaleLinear, scaleTime, min, max } from "d3";
import { useMemo } from "react";
import { LineChartDataItem } from "src/types/data";
interface Props {
filteredDataSet: LineChartDataItem[];
width: number;
margin: { left: number; right: number };
xAxisDataType: "number" | "date_annual" | "date_monthly";
}
const useLineChartXscale = (
filteredDataSet: LineChartDataItem[],
width: number,
margin: { left: number; right: number },
xAxisDataType: "number" | "date_annual" | "date_monthly"
) => {
return useMemo(() => {
if (xAxisDataType === "number") {
return scaleLinear()
.domain([
min(filteredDataSet.flatMap(item => item.series.map(d => Number(d.date)))) || 0,
max(filteredDataSet.flatMap(item => item.series.map(d => Number(d.date)))) || 1,
])
.range([margin.left, width - margin.right])
.clamp(true)
.nice();
}
if (xAxisDataType === "date_annual") {
// sometimes the first tick is missing, so do a hack here
const minDate = min(
filteredDataSet.flatMap(item => item.series.map(d => new Date(`${d.date}-01-01`)))
);
const maxDate = max(
filteredDataSet.flatMap(item => item.series.map(d => new Date(`${d.date}`)))
);
return scaleTime()
.domain([
minDate instanceof Date ? minDate : new Date(minDate || 0),
maxDate instanceof Date ? maxDate : new Date(maxDate || 1),
])
.range([margin.left, width - margin.right]);
}
const minDate = min(filteredDataSet.flatMap(item => item.series.map(d => new Date(d.date))));
const maxDate = max(filteredDataSet.flatMap(item => item.series.map(d => new Date(d.date))));
return scaleTime()
.domain([
minDate instanceof Date ? minDate : new Date(minDate || 0),
maxDate instanceof Date ? maxDate : new Date(maxDate || 1),
])
.range([margin.left, width - margin.right]);
}, [filteredDataSet, width, margin, xAxisDataType]);
};
export default useLineChartXscale;
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