# All files / components RectLayer.tsx

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     import React, {FunctionComponent, RefObject} from 'react'

    import {useCanvas} from '../utils/useCanvas'
    import {drawRects} from '../utils/drawRects'
    import {
      findHoveredRects,
      get1DTooltipData,
      get2DTooltipData,
    } from '../utils/legend/rectTooltip'
    import {Tooltip} from './Tooltip'
    import {RectLayerConfig, RectLayerSpec, LayerProps, LegendData} from '../types'

    export interface Props extends LayerProps {
      spec: RectLayerSpec
      config: RectLayerConfig
      canvasRef: RefObject<HTMLCanvasElement>
    }

    export const RectLayer: FunctionComponent<Props> = ({
      spec,
      config,
      plotConfig,
      width,
      height,
      xScale,
      yScale,
      hoverX,
      hoverY,
      columnFormatter,
      canvasRef,
    }) => {
      const hoveredRowIndices = findHoveredRects(
        spec.table,
        hoverX,
        hoverY,
        xScale,
        yScale,
        spec.binDimension
      )

      const drawRectsOptions = {
        table: spec.table,
        xScale,
        yScale,
        fillScale: spec.scales.fill,
        hoveredRowIndices,
        strokeWidth: config.strokeWidth,
        strokePadding: config.strokePadding,
        strokeOpacity: config.strokeOpacity,
        fillOpacity: config.fillOpacity,
      }

      useCanvas(
        canvasRef,
        width,
        height,
        context => drawRects({context, ...drawRectsOptions}),
        Object.values(drawRectsOptions)
      )

      let tooltipData: LegendData = []

      if (hoveredRowIndices.length > 0 && spec.binDimension === 'xy') {
        tooltipData = get2DTooltipData(
          hoveredRowIndices,
          spec.table,
          spec.inputTable,
          config.x,
          (config as any).y,
          columnFormatter
        )
      } else if (hoveredRowIndices.length > 0 && spec.binDimension === 'x') {
        tooltipData = get1DTooltipData(
          hoveredRowIndices,
          spec.table,
          spec.inputTable,
          config.x,
          spec.columnGroupMaps.fill,
          spec.scales.fill,
          columnFormatter
        )
      }

      return (
        <>
          <canvas
            className="giraffe-layer giraffe-layer-rect"
            ref={canvasRef}
            style={{position: 'absolute'}}
            data-testid="giraffe-layer-rect"
          />
          {tooltipData.length > 0 && (
            <Tooltip data={tooltipData} config={plotConfig} />
          )}
        </>
      )
    }

    RectLayer.displayName = 'RectLayer'