Method layoutSubviews

packages/react-devtools-timeline/src/view-base/View.js:239–252

* Layout self and subviews. * * Implementations should call `setNeedsDisplay` if a draw is required. * * The default implementation uses `this.layouter` to lay out subviews. * * Can be overwritten by subclasses that wish to manually manage their * subviews' layout. * * NOT

()

   * @see displayIfNeeded
   */
  layoutSubviews() {
    const {frame, _layouter, subviews, visibleArea} = this;
    const existingLayout = viewsToLayout(subviews);
    const newLayout = _layouter(existingLayout, frame);
    collapseLayoutIntoViews(newLayout);

    subviews.forEach((subview, subviewIndex) => {
      if (rectIntersectsRect(visibleArea, subview.frame)) {
        subview.setVisibleArea(intersectionOfRects(visibleArea, subview.frame));
      } else {
        subview.setVisibleArea(zeroRect);
      }
    });
  }

  /**
   * Draw the contents of this view in the given canvas `context`.