Method selector_changed

js/src/Bars.ts:247–268

(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.pixelCoords;
    const indices = new Uint32Array(_.range(pixels.length));
    // Here we only select bar groups. It shouldn't be too hard to select
    // individual bars, the `selected` attribute would then be a list of pairs.
    const selected_groups = indices.filter((index) => {
      const bars = pixels[index];
      for (let i = 0; i < bars.length; i++) {
        if (rect_selector(bars[i])) {
          return true;
        }
      }
      return false;
    });
    this.model.set('selected', selected_groups);
    this.touch();
  }

  private updateSelected() {
    this.selected_indices = this.model.get('selected');