Method Add

libs/drape/overlay_tree.cpp:170–215

}

void OverlayTree::Add(ref_ptr<OverlayHandle> handle)
{
  /// @todo Fires when deleting downloaded country ?!
  // ASSERT(handle->GetOverlayID().IsValid(), ());
  ASSERT(IsNeedUpdate(), ());

  ScreenBase const & modelView = GetModelView();

  handle->SetIsVisible(false);

  if (m_zoomLevel < handle->GetMinVisibleScale())
    return;

  handle->EnableCaching(true);

  // Skip duplicates.
  if (IsInCache(handle))
    return;

  // Skip not-ready handles.
  if (!handle->Update(modelView))
  {
    InvalidateOnNextFrame();
    handle->SetReady(false);
    return;
  }
  else
  {
    handle->SetReady(true);
  }

  // Clip handles which are out of screen if these handles were not displacers
  // last time. Also clip all handles in reverse projection.
  m2::RectD const pixelRect = handle->GetExtendedPixelRect(modelView);
  if (modelView.IsReverseProjection3d(pixelRect.Center()) ||
      (m_displacers.find(handle) == m_displacers.end() && !m_traits.GetExtendedScreenRect().IsIntersect(pixelRect)))
  {
    handle->SetIsVisible(false);
    return;
  }

  ASSERT_GREATER_OR_EQUAL(handle->GetOverlayRank(), 0, ());
  size_t const rank = static_cast<size_t>(handle->GetOverlayRank());
  ASSERT_LESS(rank, m_handles.size(), ());
  m_handles[rank].emplace_back(std::move(handle));
}

void OverlayTree::InsertHandle(ref_ptr<OverlayHandle> handle, int currentRank,
                               ref_ptr<OverlayHandle> const & parentOverlay)