List related features

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 // [WriteFile Name=ListRelatedFeatures, Category=Features] // [Legal] // Copyright 2017 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  // sample headers #include "ListRelatedFeatures.h" #include "RelatedFeature.h" #include "RelatedFeatureListModel.h"  // ArcGIS Maps SDK headers #include "ArcGISFeature.h" #include "ArcGISFeatureLayerInfo.h" #include "ArcGISFeatureTable.h" #include "AttributeListModel.h" #include "CoreTypes.h" #include "Envelope.h" #include "Error.h" #include "FeatureIterator.h" #include "FeatureLayer.h" #include "FeatureQueryResult.h" #include "LayerListModel.h" #include "Map.h" #include "MapQuickView.h" #include "MapTypes.h" #include "Point.h" #include "QueryParameters.h" #include "RelatedFeatureQueryResult.h" #include "SelectionProperties.h" #include "SpatialReference.h" #include "ViewInsets.h"  // Qt headers #include <QFuture> #include <QList> #include <QUrl> #include <QUuid>  // STL headers #include <memory>  using namespace Esri::ArcGISRuntime;  namespace {  // Convenience RAII struct that deletes all pointers in given container.  struct FeatureQueryListResultLock  {  FeatureQueryListResultLock(const QList<RelatedFeatureQueryResult*>& list) : results(list) { }  ~FeatureQueryListResultLock() { qDeleteAll(results); }  const QList<RelatedFeatureQueryResult*>& results;  }; }  ListRelatedFeatures::ListRelatedFeatures(QQuickItem* parent /* = nullptr */):  QQuickItem(parent) { }  void ListRelatedFeatures::init() {  // Register the map view for QML  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");  qmlRegisterType<ListRelatedFeatures>("Esri.Samples", 1, 0, "ListRelatedFeaturesSample");  qmlRegisterAnonymousType<ViewInsets>("Esri.Samples", 1);  qmlRegisterUncreatableType<RelatedFeatureListModel>("Esri.ArcGISRuntimeSamples", 1, 0,  "RelatedFeatureListModel", "RelatedFeatureListModel is an uncreatable type"); }  void ListRelatedFeatures::componentComplete() {  QQuickItem::componentComplete();   // Create a list model to store the related features  m_relatedFeaturesModel = new RelatedFeatureListModel(this);  emit relatedFeaturesModelChanged();   // find QML MapView component  m_mapView = findChild<MapQuickView*>("mapView");  m_mapView->setSelectionProperties(SelectionProperties(QColor(Qt::yellow)));   // Create a map using the URL of a web map  m_map = new Map(QUrl("https://arcgis.com/home/item.html?id=dcc7466a91294c0ab8f7a094430ab437"), this);   // Set map to map view  m_mapView->setMap(m_map);   // connect signals  connectSignals(); }  void ListRelatedFeatures::connectSignals() {  // connect to doneLoading signal  connect(m_map, &Map::doneLoading, this, [this](const Error& loadError)  {  if (!loadError.isEmpty())  return;   bool foundLayer = false; // Found the Alaska National Parks layer.  for (int i = 0; i < m_map->operationalLayers()->size() || !foundLayer; ++i)  {  // get the Alaska National Parks layer  if (m_map->operationalLayers()->at(i)->name().contains(QStringLiteral("- Alaska National Parks")))  {  foundLayer = true;  m_alaskaNationalParks = static_cast<FeatureLayer*>(m_map->operationalLayers()->at(i));  m_alaskaFeatureTable = static_cast<ArcGISFeatureTable*>(m_alaskaNationalParks->featureTable());  }  }  });   // connect to the mouseClicked signal  connect(m_mapView, &MapQuickView::mouseClicked, this, [this](QMouseEvent& mouseEvent)  {  // hide the attribute view  emit hideAttributeTable();   // clear the list model  m_relatedFeaturesModel->clear();   // create objects required to do a selection with a query  Point clickPoint = m_mapView->screenToLocation(mouseEvent.position().x(), mouseEvent.position().y());  double mapTolerance = 10 * m_mapView->unitsPerDIP();  Envelope envelope = Envelope(clickPoint.x() - mapTolerance,  clickPoint.y() - mapTolerance,  clickPoint.x() + mapTolerance,  clickPoint.y() + mapTolerance,  m_map->spatialReference());  QueryParameters queryParams;  queryParams.setGeometry(envelope);  queryParams.setSpatialRelationship(SpatialRelationship::Intersects);   // clear any selections  m_alaskaNationalParks->clearSelection();   // select features  m_alaskaNationalParks->selectFeaturesAsync(queryParams, SelectionMode::New).then(this, [this](FeatureQueryResult* rawResult)  {  auto result = std::unique_ptr<FeatureQueryResult>(rawResult);  // The result could contain more than 1 feature, but we assume that  // there is only ever 1. If more are given they are ignored. We  // are only interested in the first (and only) feature.  if (result->iterator().hasNext())  {  m_selectedFeature = static_cast<ArcGISFeature*>(result->iterator().next(this));   // zoom to the selected feature  m_mapView->setViewpointGeometryAsync(m_selectedFeature->geometry().extent(), 100);   // query related features  m_alaskaFeatureTable->queryRelatedFeaturesAsync(m_selectedFeature).then(this, [this](QList<RelatedFeatureQueryResult*> rawRelatedResults)  {  FeatureQueryListResultLock lock(rawRelatedResults);  for (const RelatedFeatureQueryResult* relatedResult : lock.results)  {  while (relatedResult->iterator().hasNext())  {  // get the related feature  const ArcGISFeature* feature = static_cast<ArcGISFeature*>(relatedResult->iterator().next());  const ArcGISFeatureTable* relatedTable = static_cast<ArcGISFeatureTable*>(feature->featureTable());  const QString displayFieldName = relatedTable->layerInfo().displayFieldName();  const QString serviceLayerName = relatedTable->layerInfo().serviceLayerName();  const QString displayFieldValue = feature->attributes()->attributeValue(displayFieldName).toString();   // add the related feature to the list model  RelatedFeature relatedFeature = RelatedFeature(displayFieldName,  displayFieldValue,  serviceLayerName);  m_relatedFeaturesModel->addRelatedFeature(relatedFeature);  emit relatedFeaturesModelChanged();  }  }   if (m_selectedFeature)  {  delete m_selectedFeature;  m_selectedFeature = nullptr;  }   emit showAttributeTable();  });  }  });  }); }  QAbstractListModel* ListRelatedFeatures::relatedFeaturesModel() const {  return m_relatedFeaturesModel; }