Display content of utility network container

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Sample viewer app

A utility network container allows a dense collection of features to be represented by a single feature, which can be used to reduce map clutter.

screenshot

Use case

Offering a container view for features aids in the review for valid structural attachment and containment relationships and helps determine if a dataset has an association role set. Container views often model a cluster of electrical devices on a pole top or inside a cabinet or vault.

How to use the sample

Select a container feature to show all features inside the container. The container is shown as a polygon graphic with the content features contained within. The viewpoint and scale of the map are also changed to the container's extent. Connectivity and attachment associations inside the container are shown as red and blue dotted lines respectively.

How it works

Load a web map that includes ArcGIS Pro Subtype Group Layers with only container features visible (i.e. fuse bank, switch bank, transformer bank, hand hole and junction box).
Create and load a UtilityNetwork with the same feature service URL as the layers in the Map.
Add a GraphicsOverlay for displaying a container view.
Create a connection to MapQuickView::mouseClicked.
Identify a feature with MapView::identifyLayersAsync and create a UtilityElement from it.
Get the associations for this element using UtilityNetwork::associationsAsync(UtilityElement *element, UtilityAssociationType::Containment).
Turn-off the visibility of all OperationalLayers.
Get the features for the UtilityElement(s) from the associations using UtilityNetwork::featuresForElementsAsync(const QList<UtilityElement *> &elements)
Add a Graphic with the geometry and symbol of each feature to the GraphicsOverlay.
Get associations for the extent of the GraphicsOverlay using UtilityNetwork::associationsAsync(const Envelope &extent)
Add a Graphic to represent the association geometry between container features using a symbol that distinguishes between Attachment and Connectivity association type.
Add another Graphic that represents this extent and zoom to this extent with some buffer.

Relevant API

SubtypeFeatureLayer
UtilityAssociation
UtilityAssociationType
UtilityElement
UtilityNetwork

About the data

The Naperville electric network feature service, hosted on ArcGIS Online (authentication required: this is handled within the sample code), contains a utility network used to find associations shown in this sample and a web map portal item, Naperville electric containers, that use the same feature service endpoint and displays only container features.

Additional information

Using utility network on ArcGIS Enterprise 10.8 requires an ArcGIS Enterprise member account licensed with the Utility Network user type extension. Please refer to the utility network services documentation.

Sample Code

DisplayContentOfUtilityNetworkContainer.cpp

DisplayContentOfUtilityNetworkContainer.h

SymbolImageProvider.cpp

SymbolImageProvider.h

DisplayContentOfUtilityNetworkContainer.qml

Use dark colors for code blocksCopy
// [WriteFile Name=DisplayContentOfUtilityNetworkContainer, Category=UtilityNetwork]
// [Legal]
// Copyright 2021 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD

#include "DisplayContentOfUtilityNetworkContainer.h"
#include "SymbolImageProvider.h"

#include "ArcGISFeatureListModel.h"
#include "ArcGISFeatureTable.h"
#include "AuthenticationManager.h"
#include "GeometryEngine.h"
#include "Map.h"
#include "MapQuickView.h"
#include "SubtypeFeatureLayer.h"
#include "UtilityAssetType.h"
#include "UtilityAssociation.h"
#include "UtilityElement.h"
#include "UtilityNetwork.h"
#include "UtilityNetworkTypes.h"
#include "MapTypes.h"
#include "SymbolTypes.h"
#include "Error.h"
#include "GraphicsOverlayListModel.h"
#include "GraphicListModel.h"
#include "LayerListModel.h"
#include "Credential.h"
#include "AuthenticationChallenge.h"
#include "IdentifyLayerResult.h"
#include "ArcGISFeature.h"
#include "ArcGISFeatureTable.h"
#include "ArcGISFeatureLayerInfo.h"
#include "DrawingInfo.h"
#include "GraphicsOverlay.h"
#include "Graphic.h"
#include "ErrorException.h"
#include "Envelope.h"
#include "ArcGISFeatureTable.h"
#include "SpatialReference.h"
#include "Renderer.h"
#include "Point.h"
#include "Polygon.h"
#include "Symbol.h"
#include "SimpleLineSymbol.h"

#include <QImage>
#include <QQmlContext>
#include <QUuid>

using namespace Esri::ArcGISRuntime;

DisplayContentOfUtilityNetworkContainer::DisplayContentOfUtilityNetworkContainer(QObject* parent /* = nullptr */):
  QObject(parent),
  m_cred(new Credential("viewer01", "I68VGU^nMurF", this))
{
  connect(AuthenticationManager::instance(), &AuthenticationManager::authenticationChallenge, this, [this](AuthenticationChallenge* challenge)
  {
    challenge->continueWithCredential(m_cred);
  });

  // Load a web map that includes ArcGIS Pro Subtype Group Layers with only container features visible (i.e. fuse bank, switch bank, transformer bank, hand hole and junction box)
  m_map = new Map(QUrl("https://sampleserver7.arcgisonline.com/portal/home/item.html?id=813eda749a9444e4a9d833a4db19e1c8"), this);

  // Create and load a UtilityNetwork with the same feature service URL as the layers in the Map
  m_utilityNetwork = new UtilityNetwork(QUrl("https://sampleserver7.arcgisonline.com/server/rest/services/UtilityNetwork/NapervilleElectric/FeatureServer"), this);
  m_utilityNetwork->load();
}

DisplayContentOfUtilityNetworkContainer::~DisplayContentOfUtilityNetworkContainer() = default;

void DisplayContentOfUtilityNetworkContainer::init()
{
  // Register the map view for QML
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<DisplayContentOfUtilityNetworkContainer>("Esri.Samples", 1, 0, "DisplayContentOfUtilityNetworkContainerSample");
}

MapQuickView* DisplayContentOfUtilityNetworkContainer::mapView() const
{
  return m_mapView;
}

// Set the view (created in QML)
void DisplayContentOfUtilityNetworkContainer::setMapView(MapQuickView* mapView)
{
  if (!mapView || mapView == m_mapView)
    return;

  m_mapView = mapView;
  m_mapView->setMap(m_map);

  // Add a GraphicsOverlay for displaying a container view.
  m_containerGraphicsOverlay = new GraphicsOverlay(this);
  m_mapView->graphicsOverlays()->append(m_containerGraphicsOverlay);

  createConnections();
  createLegend();

  emit mapViewChanged();
}

void DisplayContentOfUtilityNetworkContainer::createConnections()
{
  connect(m_mapView, &MapQuickView::mouseClicked, this, &DisplayContentOfUtilityNetworkContainer::identifyFeaturesAtMouseClick);

  // Connect error signals to message box
  connect(m_map, &Map::errorOccurred, this, [this](const Error& e)
  {
    setMessageBoxText("Map error: " + e.message() + " " + e.additionalMessage());
  });

  connect(m_mapView, &MapQuickView::errorOccurred, this, [this](const Error& e)
  {
    setMessageBoxText("MapView error: " + e.message() + " " + e.additionalMessage());
  });
}

void DisplayContentOfUtilityNetworkContainer::onTaskFailed(const QString& errorMsg, const ErrorException& taskException)
{
  setMessageBoxText(errorMsg + taskException.error().message() + " " + taskException.error().additionalMessage());
}

void DisplayContentOfUtilityNetworkContainer::identifyFeaturesAtMouseClick(QMouseEvent& mouseEvent)
{
  if (m_map->loadStatus() != LoadStatus::Loaded || m_utilityNetwork->loadStatus() != LoadStatus::Loaded || !m_featuresFuture.isFinished())
    return;

  constexpr double tolerance = 5;
  constexpr bool returnPopupsOnly = false;

  m_mapView->identifyLayersAsync(mouseEvent.position(), tolerance, returnPopupsOnly).then(this, [this](const QList<IdentifyLayerResult*>& identifyResults)
  {
    getUtilityAssociationsOfFeature(identifyResults);
  }).onFailed(this, [this](const ErrorException& e)
  {
    onTaskFailed("MapView error: ", e);
  });
}

void DisplayContentOfUtilityNetworkContainer::getUtilityAssociationsOfFeature(const QList<IdentifyLayerResult*>& identifyResults)
{
  if (identifyResults.isEmpty())
    return;

  if (m_containerElement)
  {
    delete m_containerElement;
    m_containerElement = nullptr;
  }

  // Identify a feature and create a UtilityElement from it.
  for (IdentifyLayerResult* layerResult : identifyResults)
  {
    if (!m_containerElement && dynamic_cast<SubtypeFeatureLayer*>(layerResult->layerContent()))
    {
      const auto results = layerResult->sublayerResults();
      for (const IdentifyLayerResult* sublayerResult : results)
      {
        const auto elements = sublayerResult->geoElements();
        for (GeoElement* geoElement : elements)
        {
          if (ArcGISFeature* feature = dynamic_cast<ArcGISFeature*>(geoElement))
          {
            m_containerElement = m_utilityNetwork->createElementWithArcGISFeature(feature);
            if (!m_containerElement)
              return;

            // Queries for a list of all UtilityAssociation objects of containment association types present in the geodatabase for the m_containerElement.
            m_utilityAssociationFuture = m_utilityNetwork->associationsAsync(m_containerElement, UtilityAssociationType::Containment);
            m_utilityAssociationFuture.then(this, [this](const QList<UtilityAssociation*>& containmentAssociations)
            {
              onAssociationsCompleted_(containmentAssociations);
            }).onFailed(this, [this](const ErrorException& e)
            {
              onTaskFailed("Utility Network error occured: ", e);
            });
            return;
          }
        }
      }
    }
  }
}

void DisplayContentOfUtilityNetworkContainer::onAssociationsCompleted_(const QList<UtilityAssociation*>& containmentAssociations)
{
  if (!m_showContainerView)
    getFeaturesForElementsOfUtilityAssociations(containmentAssociations);
  else
    showAttachmentAndConnectivitySymbols(containmentAssociations);
};

void DisplayContentOfUtilityNetworkContainer::getFeaturesForElementsOfUtilityAssociations(const QList<UtilityAssociation*>& containmentAssociations)
{
  // Create a list of elements representing the participants in the containment associations
  QList<UtilityElement*> contentElements;
  for (UtilityAssociation* association : containmentAssociations)
  {
    UtilityElement* otherElement = association->fromElement()->objectId() == m_containerElement->objectId() ? association->toElement() : association->fromElement();
    contentElements.append(otherElement);
  }

  if (!contentElements.isEmpty())
  {
    // Set visibility of all `OperationalLayers` to `false`
    setShowContainerView(true);

    // Get the features for the UtilityElements
    m_featuresFuture = m_utilityNetwork->featuresForElementsAsync(contentElements);
    m_featuresFuture.then(this, [this](QList<ArcGISFeature*>)
    {
      displayFeaturesAndGetAssociations();
    }).onFailed(this, [this](const ErrorException& e)
    {
      onTaskFailed("Utility Network error occured: ", e);
    });
  }
}

void DisplayContentOfUtilityNetworkContainer::displayFeaturesAndGetAssociations()
{
  // Display the features on the graphics overlay
  const QList<Feature*> contentFeatures = m_utilityNetwork->featuresForElementsResult()->features();
  for (Feature* content : contentFeatures)
  {
    Symbol* symbol = dynamic_cast<ArcGISFeatureTable*>(content->featureTable())->layerInfo().drawingInfo().renderer(this)->symbol(content);
    m_containerGraphicsOverlay->graphics()->append(new Graphic(content->geometry(), symbol, this));
  }

  // Get the associations for each feature within the graphics overlay extent
  m_utilityAssociationFuture = m_utilityNetwork->associationsAsync(m_containerGraphicsOverlay->extent());
  m_utilityAssociationFuture.then(this, [this](const QList<UtilityAssociation*>& containmentAssociations)
  {
    onAssociationsCompleted_(containmentAssociations);
  }).onFailed(this, [this](const ErrorException& e)
  {
    onTaskFailed("Utility Network error occured: ", e);
  });
}

void DisplayContentOfUtilityNetworkContainer::showAttachmentAndConnectivitySymbols(const QList<UtilityAssociation*>& containmentAssociations)
{
  // Display the association lines on the graphics overlay
  for (UtilityAssociation* association : containmentAssociations)
  {
    Symbol* symbol = association->associationType() == UtilityAssociationType::Attachment ? m_attachmentSymbol : m_connectivitySymbol;
    m_containerGraphicsOverlay->graphics()->append(new Graphic(association->geometry(), symbol, this));
  }

  // If there are no associations, create a bounding box graphic using the viewpoint, otherwise use the extent of the graphics overlay
  if (m_containerGraphicsOverlay->graphics()->size() == 1 && m_containerGraphicsOverlay->graphics()->first()->geometry().geometryType() == GeometryType::Point)
  {
    m_mapView->setViewpointAndWait(Viewpoint(Point(m_containerGraphicsOverlay->graphics()->first()->geometry()), m_containerElement->assetType()->containerViewScale()));
    m_boundingBox = m_mapView->currentViewpoint(ViewpointType::BoundingGeometry).targetGeometry();
    m_mapView->setViewpointAndWait(m_previousViewpoint);

    setMessageBoxText("This feature contains no associations");
  }
  else
  {
    m_boundingBox = GeometryEngine::buffer(m_containerGraphicsOverlay->extent(), 0.05);
  }

  m_containerGraphicsOverlay->graphics()->append(new Graphic(m_boundingBox, m_boundingBoxSymbol, this));
  m_mapView->setViewpointGeometryAsync(m_containerGraphicsOverlay->extent(), 100);
}

bool DisplayContentOfUtilityNetworkContainer::showContainerView() const
{
  return m_showContainerView;
}

void DisplayContentOfUtilityNetworkContainer::setShowContainerView(bool showContainerView)
{
  m_showContainerView = showContainerView;

  if (m_showContainerView)
  {
    m_previousViewpoint = m_mapView->currentViewpoint(ViewpointType::BoundingGeometry);
    for (Layer* layer : *m_mapView->map()->operationalLayers())
    {
      layer->setVisible(false);
    }
  }
  else
  {
    m_mapView->setViewpointAsync(m_previousViewpoint, 0.5);
    m_containerGraphicsOverlay->graphics()->clear();

    for (Layer* layer : *m_mapView->map()->operationalLayers())
    {
      layer->setVisible(true);
    }
  }

  emit showContainerViewChanged();
}

QString DisplayContentOfUtilityNetworkContainer::messageBoxText() const
{
  return m_messageBoxText;
}

void DisplayContentOfUtilityNetworkContainer::setMessageBoxText(const QString& message)
{
  m_messageBoxText = message;
  emit messageBoxTextChanged();
}

// Create attachment, connectivity, and bounding box legend
void DisplayContentOfUtilityNetworkContainer::createLegend()
{
  QQmlEngine* engine = QQmlEngine::contextForObject(this)->engine();
  m_symbolImageProvider = new SymbolImageProvider();
  engine->addImageProvider(SymbolImageProvider::imageProviderId(), m_symbolImageProvider);

  m_attachmentSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Dot, Qt::blue, 3, this);
  m_connectivitySymbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Dot, Qt::red, 3, this);
  m_boundingBoxSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Dot, Qt::yellow, 3, this);

  m_attachmentSymbol->createSwatchAsync().then(this, [this](const QImage& image)
  {
    if (!m_symbolImageProvider)
      return;

    // convert the QUuid into a QString
    const QString imageId = QUuid().createUuid().toString(QUuid::WithoutBraces);

    // add the image to the provider
    m_symbolImageProvider->addImage(imageId, image);

    // update the URL with the unique id
    m_attachmentSymbolUrl = QString("image://%1/%2").arg(SymbolImageProvider::imageProviderId(), imageId);

    // emit the signal to trigger the QML Image to update
    emit attachmentSymbolUrlChanged();
  });

  m_connectivitySymbol->createSwatchAsync().then(this, [this](const QImage& image)
  {
    if (!m_symbolImageProvider)
      return;

    // convert the QUuid into a QString
    const QString imageId = QUuid().createUuid().toString(QUuid::WithoutBraces);

    // add the image to the provider
    m_symbolImageProvider->addImage(imageId, image);

    // update the URL with the unique id
    m_connectivitySymbolUrl = QString("image://%1/%2").arg(SymbolImageProvider::imageProviderId(), imageId);

    // emit the signal to trigger the QML Image to update
    emit connectivitySymbolUrlChanged();
  });

  m_boundingBoxSymbol->createSwatchAsync().then(this, [this](const QImage& image)
  {
    if (!m_symbolImageProvider)
      return;

    // convert the QUuid into a QString
    const QString imageId = QUuid().createUuid().toString(QUuid::WithoutBraces);

    // add the image to the provider
    m_symbolImageProvider->addImage(imageId, image);

    // update the URL with the unique id
    m_boundingBoxSymbolUrl = QString("image://%1/%2").arg(SymbolImageProvider::imageProviderId(), imageId);

    // emit the signal to trigger the QML Image to update
    emit boundingBoxSymbolUrlChanged();
  });
}

QString DisplayContentOfUtilityNetworkContainer::attachmentSymbolUrl() const
{
  return m_attachmentSymbolUrl;
}

QString DisplayContentOfUtilityNetworkContainer::connectivitySymbolUrl() const
{
  return m_connectivitySymbolUrl;
}

QString DisplayContentOfUtilityNetworkContainer::boundingBoxSymbolUrl() const
{
  return m_boundingBoxSymbolUrl;
}