Chromosomes explorer

import * as uchi from "npm:uchimata";

display(renderer.getCanvasElement());

const defaultViewConfig = ({
  scale: 0.005,
  color: {
    field: "chr",
    colorScale: "set2",
  },
  links: true,
  linksScale: 0.5,
});

const selectedViewConfig = {
  scale: 0.02,
  mark: "box",
  color: "orange",
  links: false,
};

const unselectedViewConfig = {
  scale: 0.005,
  color: "#a3a3a3",
  links: false,
};

//~ create a scene
let chromatinScene = uchi.initScene();

if (selectedChromosome === "whole") {
  chromatinScene = uchi.addStructureToScene(chromatinScene, model, defaultViewConfig);
} else {
  const selectionTable = await uchi.selectChromosome(model.data, selectedChromosome);
  const subModel = {
    ...model,
    data: selectionTable,
  };
  chromatinScene = uchi.addStructureToScene(chromatinScene, subModel, selectedViewConfig);
  chromatinScene = uchi.addStructureToScene(chromatinScene, model, unselectedViewConfig);
}

const [renderer, canvas] = uchi.display(chromatinScene, { alwaysRedraw: false});

//~ ObservableHQ mechanism for clean-up after cell re-render
invalidation.then(() => renderer.endDrawing());

const urlStevens = "https://pub-5c3f8ce35c924114a178c6e929fc3ac7.r2.dev/Stevens-2017_GSM2219497_Cell_1_model_5.arrow";

const model = await uchi.loadFromURL(urlStevens, {
  center: true,
  normalize: true,
});

const chromosomes = getUniqueValuesOfColumn(model.data, "chr");
display(chromosomes);

function getUniqueValuesOfColumn(table, c = "chr") {
  const column = table.getChild(c);
  const values = [...column];
  const uniqueValues = [...new Set(values)];
  uniqueValues.push("whole");
  return uniqueValues;
}