kepler.gl/src/deckgl-layers/grid-layer/enhanced-grid-layer.js

kepler.gl is a webgl based application to visualize large scale location data in the browser

// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import {GridLayer} from 'deck.gl';
import {getColorValueDomain, getColorScaleFunction} from '../layer-utils/utils';
import EnhancedGridCellLayer from './enhanced-grid-cell-layer';

const defaultProps = {
  ...GridLayer.defaultProps,
  colorScale: 'quantile'
};

export default class EnhancedGridLayer extends GridLayer {
  getDimensionUpdaters() {
    const dimensionUpdaters = super.getDimensionUpdaters();
    // add colorScale to dimension updates
    dimensionUpdaters.getColor[1].triggers.push('colorScale');
    return dimensionUpdaters;
  }

  /*
   * override default layer method to calculate color domain
   * and scale function base on color scale type
   */
  getColorValueDomain() {
    getColorValueDomain(this);
  }

  getColorScale() {
    getColorScaleFunction(this);
  }

  /*
   * override default getSubLayerClass to return customized cellLayer
   */
  getSubLayerClass() {
    return EnhancedGridCellLayer;
  }
}

EnhancedGridLayer.layerName = 'EnhancedGridLayer';
EnhancedGridLayer.defaultProps = defaultProps;