Function getPointerGridCell

src/hooks/usePanelDrag.ts:275–285

(metrics: ContainerMetrics, clientX: number, clientY: number)

}

function getPointerGridCell(metrics: ContainerMetrics, clientX: number, clientY: number) {
  const colUnit = metrics.cellWidth + metrics.colGap;
  const rowUnit = metrics.rowHeight + metrics.rowGap;
  const localX = clientX - metrics.rect.left - metrics.paddingLeft + metrics.scrollLeft;
  const localY = clientY - metrics.rect.top - metrics.paddingTop + metrics.scrollTop;

  const col = Math.max(0, Math.floor(localX / Math.max(1, colUnit)));
  const row = Math.max(0, Math.floor(localY / Math.max(1, rowUnit)));

  return { row, col };
}

function candidateContainsCell(candidate: PreviewCandidate, row: number, col: number) {
  return (