Conditionally Applying Margins in a Virtual Grid

Provide a code example that applies different margins to grid items in a virtualized grid layout based on specific conditions, such as item content size or user preferences, to improve layout adaptability.

import { FixedSizeGrid as Grid } from 'react-window';

const Cell = ({ columnIndex, rowIndex, style }) => {
  // Assuming getMargin is a function that determines margin size
  const margin = getMargin(columnIndex, rowIndex);
  const modifiedStyle = {
    ...style,
    margin,
  };

  return <div style={modifiedStyle}>Cell {rowIndex},{columnIndex}</div>;
};

This code snippet imports the FixedSizeGrid component from 'react-window' and defines a Cell component. The Cell component determines its margin by calling a hypothetical getMargin function with its column and row indices. The margin is then applied to the cell's style, modifying its original style passed as a prop. This allows conditional application of margins based on the cell's position in the grid.

const getMargin = (columnIndex, rowIndex) => {
  // Example logic for determining margin size
  if (rowIndex % 2 === 0) {
    return '5px';
  } else if (columnIndex % 2 === 0) {
    return '10px';
  }
  return '2px';
};

This function, getMargin, is a hypothetical example used for determining the margin size based on the columnIndex and rowIndex. If the row is even, it returns '5px'; if the column is even, it returns '10px'; otherwise, it returns '2px'. This function illustrates how margins could be conditionally applied based on the content's position within the grid.

<Grid
  columnCount={100}
  columnWidth={100}
  height={300}
  rowCount={100}
  rowHeight={35}
  width={300}
>
  {Cell}
</Grid>

This snippet shows how to use the FixedSizeGrid component with the Cell renderer function. The grid is configured with a specified number of columns and rows, each having defined dimensions. The Cell component, which applies conditional margins, is used to render each cell in the grid.