constructor()

in packages/charts/src/chart_types/flame_chart/flame_chart.tsx [244:281]

• 30 lines of code
• 11 McCabe index (conditional complexity)

  constructor(props: Readonly<FlameProps>) {
    super(props);
    const columns = this.props.columnarViewModel;

    // vector length checks
    const datumCount = columns.position1.length / 2;
    if (datumCount % 1) throw new Error('flame error: position1 vector must have even values (x/y pairs)');
    if (datumCount * 2 !== columns.position0.length)
      throw new Error('flame error: Mismatch between position0 (xy) and position1 (xy) length');
    if (datumCount !== columns.size0.length)
      throw new Error('flame error: Mismatch between position1 (xy) and size0 length');
    if (datumCount !== columns.size1.length)
      throw new Error('flame error: Mismatch between position1 (xy) and size1 length');
    if (datumCount * 4 !== columns.color.length)
      throw new Error('flame error: Mismatch between position1 (xy) and color (rgba) length');
    if (datumCount !== columns.value.length)
      throw new Error('flame error: Mismatch between position1 (xy) and value length');
    if (datumCount !== columns.label.length)
      throw new Error('flame error: Mismatch between position1 (xy) and label length');

    this.targetFocus = this.getFocusOnRoot();

    this.bindControls();
    this.currentFocus = { ...this.targetFocus };

    // Initialize nav queue with the root element
    this.navigator = new NavButtonControlledZoomPanHistory({ ...this.getFocusOnRoot(), index: 0 });

    // browser pinch zoom handling
    this.setupViewportScaleChangeListener();

    // search
    this.currentColor = columns.color;

    // node size/position tween time
    this.prevNodeTweenTime =
      columns.position0 === columns.position1 && columns.size0 === columns.size1 ? -Infinity : Infinity; // if nothing to tween, then skip it
  }