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feat(chart-interaction): add getSvgPointerX function for improved pointer handling in charts

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Kyush 2026-04-23 01:52:42 +09:00
commit dfafd9a826
1 changed files with 9 additions and 6 deletions
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15
client/src/ui/patterns/Charts.tsx
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@ -115,6 +115,13 @@ function getDateTicks(values: Date[], width: number): Date[] {
return scale.ticks(Math.max(2, Math.floor(width / 120))); return scale.ticks(Math.max(2, Math.floor(width / 120)));
} }
function getSvgPointerX(event: PointerEvent): number {
const target = event.currentTarget as SVGGraphicsElement;
const container = target.ownerSVGElement ?? target;
const [x] = d3.pointer(event, container);
return x;
}
interface TimeSeriesChartSeries { interface TimeSeriesChartSeries {
key: string; key: string;
label: string; label: string;
@ -279,9 +286,7 @@ export function TimeSeriesChart(props: TimeSeriesChartProps) {
}; };
const handlePointerMove = (event: PointerEvent) => { const handlePointerMove = (event: PointerEvent) => {
const rect = (event.currentTarget as SVGRectElement).getBoundingClientRect(); const hoveredDate = xScale().invert(getSvgPointerX(event));
const offsetX = event.clientX - rect.left;
const hoveredDate = xScale().invert(offsetX);
const nearestIndex = d3.leastIndex(points(), (point: ParsedTimeSeriesDatum) => Math.abs(point.parsedDate.getTime() - hoveredDate.getTime())); const nearestIndex = d3.leastIndex(points(), (point: ParsedTimeSeriesDatum) => Math.abs(point.parsedDate.getTime() - hoveredDate.getTime()));
setHoverIndex(nearestIndex ?? null); setHoverIndex(nearestIndex ?? null);
}; };
@ -486,9 +491,7 @@ export function ComboChart(props: ComboChartProps) {
}); });
const handlePointerMove = (event: PointerEvent) => { const handlePointerMove = (event: PointerEvent) => {
const rect = (event.currentTarget as SVGRectElement).getBoundingClientRect(); const hoveredDate = xScale().invert(getSvgPointerX(event));
const offsetX = event.clientX - rect.left;
const hoveredDate = xScale().invert(offsetX);
const nearestIndex = d3.leastIndex(points(), (point: ParsedComboDatum) => Math.abs(point.parsedDate.getTime() - hoveredDate.getTime())); const nearestIndex = d3.leastIndex(points(), (point: ParsedComboDatum) => Math.abs(point.parsedDate.getTime() - hoveredDate.getTime()));
setHoverIndex(nearestIndex ?? null); setHoverIndex(nearestIndex ?? null);
}; };