Feature layer (shapefile)

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// [WriteFile Name=FeatureLayerShapefile, Category=Layers]
// [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

#include "FeatureLayerShapefile.h"

#include "Map.h"
#include "MapQuickView.h"
#include "Basemap.h"
#include "ShapefileFeatureTable.h"
#include "FeatureLayer.h"

#include <QDir>
#include <QtCore/qglobal.h>

#ifdef Q_OS_IOS
#include <QStandardPaths>
#endif // Q_OS_IOS

using namespace Esri::ArcGISRuntime;

// helper method to get cross platform data path
namespace
{
QString defaultDataPath()
{
  QString dataPath;

#ifdef Q_OS_ANDROID
  dataPath = "/sdcard";
#elif defined Q_OS_IOS
  dataPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
#else
  dataPath = QDir::homePath();
#endif

  return dataPath;
}
} // namespace

FeatureLayerShapefile::FeatureLayerShapefile(QQuickItem* parent /* = nullptr */):
  QQuickItem(parent)
{
}

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

void FeatureLayerShapefile::componentComplete()
{
  QQuickItem::componentComplete();

  const QString dataPath = defaultDataPath() + "/ArcGIS/Runtime/Data/shp/";

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");

  // Create a map using the streets basemap
  m_map = new Map(BasemapStyle::ArcGISStreets, this);

  // Set map to map view
  m_mapView->setMap(m_map);

  // Create and add the shapefile to the map
  createAndAddShapefileLayer(dataPath + "Public_Art.shp");
}
void FeatureLayerShapefile::createAndAddShapefileLayer(const QString& dataPath)
{
  // Create the ShapefileFeatureTable
  ShapefileFeatureTable* featureTable = new ShapefileFeatureTable(dataPath, this);

  // Create the feature layer from the ShapefileFeatureTable
  FeatureLayer* layer = new FeatureLayer(featureTable, this);

  connect(layer, &FeatureLayer::doneLoading, this, [this, layer](Error loadError)
  {
    if (!loadError.isEmpty())
      return;

    // If the layer was loaded successfully, set the map extent to the full extent of the layer
    m_mapView->setViewpointCenter(layer->fullExtent().center(), 80000);
  });

  // Add the shapefile layer to the map
  m_map->operationalLayers()->clear();
  m_map->operationalLayers()->append(layer);
}