Grid Cell Selection

A React hook for grid cell selection. A simple headless hook that.

Made by Atticus

Installation

npm install grid-cell-selection

Usage

Mouse Only

import React from "react";
import { useGridCellSelection } from "grid-cell-selection";

function App() {
  const columns = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L"];
  const rows = 20;

  const { isCellSelected, handleMouseDown, handleMouseEnter, handleMouseUp } = useGridCellSelection();

  return (
    <>
      <table onMouseUp={handleMouseUp}>
        <tbody>
          {Array.from({ length: rows }, (_, row) => (
            <tr key={row}>
              {columns.map((column, col) => (
                <td
                  key={`${row}-${col}`}
                  onMouseEnter={(event) => handleMouseEnter({ id: `${row}-${col}`, row, col }, event)}
                  onMouseDown={(event) => handleMouseDown({ id: `${row}-${col}`, row, col }, event)}
                  className={`${isCellSelected({ id: `${row}-${col}`, row, col }) ? "selected" : ""}`}
                >
                  {column}
                  {row}
                </td>
              ))}
            </tr>
          ))}
        </tbody>
      </table>
    </>
  );
}

Mouse + Touch

Note that data-cell-id, data-cell-row, and data-cell-col are required for touch events to work.

function App() {
  const columns = ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L"];
  const rows = 20;

  const { isCellSelected, handleMouseDown, handleMouseEnter, handleMouseUp, handleTouchMove, handleTouchStart } =
    useGridCellSelection();

  return (
    <table onMouseUp={handleMouseUp} onTouchMove={handleTouchMove} style={{ touchAction: "none" }}>
      <tbody>
        {Array.from({ length: rows }, (_, row) => (
          <tr key={row}>
            {columns.map((column, col) => (
              <td
                key={`${row}-${col}`}
                onMouseEnter={(event) => handleMouseEnter({ id: `${row}-${col}`, row, col }, event)}
                onMouseDown={(event) => handleMouseDown({ id: `${row}-${col}`, row, col }, event)}
                onTouchStart={(event) => handleTouchStart({ id: `${row}-${col}`, row, col }, event)}
                className={`${isCellSelected({ id: `${row}-${col}`, row, col }) ? "selected" : ""}`}
                data-cell-id={`${row}-${col}`} // Required for touch events
                data-cell-row={row} // Required for touch events
                data-cell-col={col} // Required for touch events
              >
                {column}
                {row}
              </td>
            ))}
          </tr>
        ))}
      </tbody>
    </table>
  );
}

Cell Selection Behavior

Single Cell Selection

• Click on a cell to select it.
• Clicking on a different cell deselects any previously selected cells.

Range Selection

• Click and drag to select a range of cells

Multiple Range Selection

• Hold Ctrl (or Cmd on Mac) or Shift to select multiple ranges

ID Prop

If you provide an array of all cells, the hook will include the cell IDs when tracking the selected cells.