Read a GeoPackage

// [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();
}

// [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]

#ifndef READGEOPACKAGE_H
#define READGEOPACKAGE_H

// Qt headers
#include <QQuickItem>

// STL headers
#include <Viewpoint.h>

namespace Esri::ArcGISRuntime
{
  class Map;
  class MapQuickView;
  class GeoPackage;
}

class ReadGeoPackage : public QQuickItem
{
  Q_OBJECT

public:
  explicit ReadGeoPackage(QQuickItem* parent = nullptr);
  ~ReadGeoPackage() override = default;

  void componentComplete() override;
  static void init();

private:
  void readGeoPackage();

private:
  Esri::ArcGISRuntime::Map* m_map = nullptr;
  Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr;
  Esri::ArcGISRuntime::GeoPackage* auroraGpkg = nullptr;
  QString m_dataPath;
};

#endif // READGEOPACKAGE_H

// [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]

import QtQuick
import Esri.Samples

ReadGeoPackageSample {
    id: root
    clip: true
    width: 800
    height: 600

    // add a mapView component
    MapView {
        anchors.fill: parent
        objectName: "mapView"

        Component.onCompleted: {
            // Set the focus on MapView to initially enable keyboard navigation
            forceActiveFocus();
        }
    }
}

// [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]

// sample headers
#include "ReadGeoPackage.h"

// ArcGIS Maps SDK headers
#include "ArcGISRuntimeEnvironment.h"

// Qt headers
#include <QCommandLineParser>
#include <QDir>
#include <QGuiApplication>
#include <QQmlEngine>
#include <QQuickView>

// Platform specific headers
#ifdef Q_OS_WIN
#include <Windows.h>
#endif

#define STRINGIZE(x) #x
#define QUOTE(x) STRINGIZE(x)

int main(int argc, char *argv[])
{
  Esri::ArcGISRuntime::ArcGISRuntimeEnvironment::setUseLegacyAuthentication(false);
  QGuiApplication app(argc, argv);

  // Use of ArcGIS location services, such as basemap styles, geocoding, and routing services,
  // requires an access token. For more information see
  // https://links.esri.com/arcgis-runtime-security-auth.

  // The following methods grant an access token:

  // 1. User authentication: Grants a temporary access token associated with a user's ArcGIS account.
  // To generate a token, a user logs in to the app with an ArcGIS account that is part of an
  // organization in ArcGIS Online or ArcGIS Enterprise.

  // 2. API key authentication: Get a long-lived access token that gives your application access to
  // ArcGIS location services. Go to the tutorial at https://links.esri.com/create-an-api-key.
  // Copy the API Key access token.

  const QString accessToken = QString("");

  if (accessToken.isEmpty())
  {
      qWarning() << "Use of ArcGIS location services, such as the basemap styles service, requires" <<
                    "you to authenticate with an ArcGIS account or set the API Key property.";
  }
  else
  {
      Esri::ArcGISRuntime::ArcGISRuntimeEnvironment::setApiKey(accessToken);
  }

  // Initialize the sample
  ReadGeoPackage::init();

  // Initialize application view
  QQuickView view;
  view.setResizeMode(QQuickView::SizeRootObjectToView);

  QString arcGISRuntimeImportPath = QUOTE(ARCGIS_RUNTIME_IMPORT_PATH);

#if defined(LINUX_PLATFORM_REPLACEMENT)
  // on some linux platforms the string 'linux' is replaced with 1
  // fix the replacement paths which were created
  QString replaceString = QUOTE(LINUX_PLATFORM_REPLACEMENT);
  arcGISRuntimeImportPath = arcGISRuntimeImportPath.replace(replaceString, "linux", Qt::CaseSensitive);
#endif

  // Add the import Path
  view.engine()->addImportPath(QDir(QCoreApplication::applicationDirPath()).filePath("qml"));
  // Add the Runtime and Extras path
  view.engine()->addImportPath(arcGISRuntimeImportPath);

  // Set the source
  view.setSource(QUrl("qrc:/Samples/Maps/ReadGeoPackage/ReadGeoPackage.qml"));

  view.show();

  return app.exec();
}