Function selector_changed

js/src/ScatterBase.ts:521–534

(point_selector, rect_selector)

  }

  selector_changed(point_selector, rect_selector) {
    if (point_selector === undefined) {
      this.model.set('selected', null);
      this.touch();
      return [];
    }
    const pixels = this.pixel_coords;
    const indices = new Uint32Array(_.range(pixels.length));
    const selected = indices.filter((index) => {
      return point_selector(pixels[index]);
    });
    this.model.set('selected', selected);
    this.touch();
  }

  update_selected(model, value) {
    this.selected_indices = value;