Read a GeoPackage

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 // [WriteFile Name=ReadGeoPackage, Category=Maps] // [Legal] // Copyright 2018 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 "ReadGeoPackage.h"  // ArcGIS Maps SDK headers #include "Error.h" #include "FeatureLayer.h" #include "FeatureTable.h" #include "GeoPackage.h" #include "GeoPackageFeatureTable.h" #include "GeoPackageRaster.h" #include "Layer.h" #include "LayerListModel.h" #include "Map.h" #include "MapQuickView.h" #include "MapTypes.h" #include "RasterLayer.h"  // Qt headers #include <QFuture> #include <QStandardPaths> #include <QtCore/qglobal.h>  using namespace Esri::ArcGISRuntime;  // helper method to get cross platform data path namespace {  QString defaultDataPath()  {  QString dataPath;   #ifdef Q_OS_IOS  dataPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);  #else  dataPath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);  #endif   return dataPath;  } } // namespace  ReadGeoPackage::ReadGeoPackage(QQuickItem* parent /* = nullptr */):  QQuickItem(parent),  m_dataPath(defaultDataPath() + "/ArcGIS/Runtime/Data") { }  void ReadGeoPackage::init() {  // Register the map view for QML  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");  qmlRegisterType<ReadGeoPackage>("Esri.Samples", 1, 0, "ReadGeoPackageSample"); }  void ReadGeoPackage::componentComplete() {  QQuickItem::componentComplete();   // find QML MapView component  m_mapView = findChild<MapQuickView*>("mapView");   // Create a map using the topographic basemap  m_map = new Map(BasemapStyle::ArcGISTopographic, this);   // Set map to map view  m_mapView->setMap(m_map);   // Create the initial view area  const Viewpoint initialViewpoint(39.7294, -104.8319, 500000);  m_mapView->setViewpointAsync(initialViewpoint);   // Initialize the read operation  readGeoPackage(); }  // Read the GeoPackage and create lists for the names and layer data void ReadGeoPackage::readGeoPackage() {  // Load the GeoPackage at the beginning  GeoPackage* auroraGpkg = new GeoPackage(m_dataPath + "/gpkg/AuroraCO.gpkg", this);   // Make sure there are no errors in loading the GeoPackage before interacting with it  connect(auroraGpkg, &GeoPackage::doneLoading, this, [auroraGpkg, this](const Error& error)  {  if (error.isEmpty())  {  // For each raster, create a raster layer and add the layer to the map  const auto rasters = auroraGpkg->geoPackageRasters();  for (GeoPackageRaster* rasterItm : rasters)  {  RasterLayer* rasterLyr = new RasterLayer(rasterItm, this);  rasterLyr->setOpacity(0.55f);  m_map->operationalLayers()->append(rasterLyr);  }   // For each feature table, create a feature layer and add the layer to the map  const auto tables = auroraGpkg->geoPackageFeatureTables();  for (GeoPackageFeatureTable* featureTbl : tables)  {  FeatureLayer* layer = new FeatureLayer(featureTbl, this);  m_map->operationalLayers()->append(layer);  }  }  });   auroraGpkg->load(); }