Method InsertHandle

libs/drape/overlay_tree.cpp:217–333

}

void OverlayTree::InsertHandle(ref_ptr<OverlayHandle> handle, int currentRank,
                               ref_ptr<OverlayHandle> const & parentOverlay)
{
  /// @todo Fires when updating country (delete-add) ?!
  // ASSERT(handle->GetOverlayID().IsValid(), ());
  ASSERT(IsNeedUpdate(), ());

#ifdef DEBUG_OVERLAYS_OUTPUT
  std::string str = handle->GetOverlayDebugInfo();
  if (!str.empty())
    LOG(LINFO, (str));
#endif

  ScreenBase const & modelView = GetModelView();
  ASSERT(handle->IsCachingEnabled(), ());
  m2::RectD const pixelRect = handle->GetExtendedPixelRect(modelView);

  if (!m_isDisplacementEnabled)
  {
    m_handlesCache.insert(handle);
    m_overlayIdCache[handle->GetOverlayID()].push_back(handle);
    TBase::Add(handle, pixelRect);
    return;
  }

  TOverlayContainer rivals;
  HandleComparator comparator(true /* enableMask */);

  // Find elements that already on OverlayTree and it's pixel rect
  // intersect with handle pixel rect ("Intersected elements").
  ForEachInRect(pixelRect, [&](ref_ptr<OverlayHandle> const & h)
  {
    bool const isParent = (h == parentOverlay) || (h->GetOverlayID() == handle->GetOverlayID() &&
                                                   h->GetOverlayRank() < handle->GetOverlayRank());
    if (!isParent && handle->IsIntersect(modelView, h))
      rivals.push_back(h);
  });

  // If handle is bound to its parent, parent's handle will be used.
  ref_ptr<OverlayHandle> handleToCompare = handle;
  bool const boundToParent = (parentOverlay != nullptr && handle->IsBound());
  if (boundToParent)
    handleToCompare = parentOverlay;

  bool const selected =
      m_selectedFeatureID.IsValid() && handleToCompare->GetOverlayID().m_featureId == m_selectedFeatureID;

  if (!selected)
  {
    // In this loop we decide which element must be visible.
    // If input element "handle" has more priority than all "Intersected elements",
    // then we remove all "Intersected elements" and insert input element "handle".
    // But if some of already inserted elements have more priority, then we don't insert "handle".
    for (auto const & rivalHandle : rivals)
    {
      bool reject = m_selectedFeatureID.IsValid() && rivalHandle->GetOverlayID().m_featureId == m_selectedFeatureID;
      if (!reject)
      {