Nearest vertex

// [WriteFile Name=NearestVertex, Category=Geometry]
// [Legal]
// Copyright 2020 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 "NearestVertex.h"

// ArcGIS Maps SDK headers
#include "Basemap.h"
#include "Envelope.h"
#include "FeatureLayer.h"
#include "GeometryEngine.h"
#include "Graphic.h"
#include "GraphicListModel.h"
#include "GraphicsOverlay.h"
#include "GraphicsOverlayListModel.h"
#include "LayerListModel.h"
#include "Map.h"
#include "MapQuickView.h"
#include "Point.h"
#include "PolygonBuilder.h"
#include "PortalItem.h"
#include "ProximityResult.h"
#include "SimpleFillSymbol.h"
#include "SimpleLineSymbol.h"
#include "SimpleMarkerSymbol.h"
#include "SpatialReference.h"
#include "SymbolTypes.h"

// Qt headers
#include <QFuture>

using namespace Esri::ArcGISRuntime;

namespace {
  const SpatialReference statePlaneCaliforniaZone5SpatialReference = SpatialReference(2229);
}

NearestVertex::NearestVertex(QObject* parent /* = nullptr */):
  QObject(parent)
{
  m_map = new Map(statePlaneCaliforniaZone5SpatialReference, this);

  PortalItem* portalItem = new PortalItem("8c2d6d7df8fa4142b0a1211c8dd66903", this);
  FeatureLayer* usStatesGeneralizedLayer = new FeatureLayer(portalItem, this);
  m_map->basemap()->baseLayers()->append(usStatesGeneralizedLayer);
}

NearestVertex::~NearestVertex() = default;

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

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

int NearestVertex::vertexDistance() const
{
  return m_vertexDistance;
}

int NearestVertex::coordinateDistance() const
{
  return m_coordinateDistance;
}

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

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

  // shows the polygon, clicked location, and nearest coordinate and vertex on polygon
  setupGraphics();

  // Set viewpoint to the polygon graphic
  m_mapView->setViewpointCenterAsync(m_mapView->graphicsOverlays()->first()->graphics()->first()->geometry().extent().center(), 8e6);

  emit mapViewChanged();
}

void NearestVertex::setupGraphics()
{
  // create a graphics overlay to show the polygon, clicked location, and nearest vertex
  GraphicsOverlay* graphicsOverlay = new GraphicsOverlay(this);

  // Construct a polygon from a point collection that uses the California zone 5 (ftUS) state plane coordinate system
  QList<Point> points = {
    Point(6627416.41469281, 1804532.53233782),
    Point(6669147.89779046, 2479145.16609522),
    Point(7265673.02678292, 2484254.50442408),
    Point(7676192.55880379, 2001458.66365744),
    Point(7175695.94143837, 1840722.34474458)
  };

  PolygonBuilder* polygonBuilder = new PolygonBuilder(statePlaneCaliforniaZone5SpatialReference, this);
  polygonBuilder->addPoints(points);
  SimpleLineSymbol* polygonOutlineSymbol = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, Qt::green, 2, this);
  SimpleFillSymbol* polygonFillSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle::ForwardDiagonal, Qt::green, polygonOutlineSymbol, this);
  Graphic* polygonGraphic = new Graphic(polygonBuilder->toGeometry(), polygonFillSymbol, this);

  graphicsOverlay->graphics()->append(polygonGraphic);

  // create graphics for the clicked location, nearest coordinate, and nearest vertex markers
  SimpleMarkerSymbol* clickedLocationSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::X, Qt::yellow, 15, this);
  SimpleMarkerSymbol* nearestCoordinateSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Diamond, Qt::red, 10, this);
  SimpleMarkerSymbol* nearestVertexSymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, Qt::blue, 15, this);

  Graphic* clickedLocationGraphic = new Graphic(this);
  clickedLocationGraphic->setSymbol(clickedLocationSymbol);
  Graphic* nearestCoordinateGraphic = new Graphic(this);
  nearestCoordinateGraphic->setSymbol(nearestCoordinateSymbol);
  Graphic* nearestVertexGraphic = new Graphic(this);
  nearestVertexGraphic->setSymbol(nearestVertexSymbol);

  graphicsOverlay->graphics()->append(clickedLocationGraphic);
  graphicsOverlay->graphics()->append(nearestCoordinateGraphic);
  graphicsOverlay->graphics()->append(nearestVertexGraphic);

  // add graphic to clicked location
  connect(m_mapView, &MapQuickView::mouseClicked, this,
          [nearestVertexGraphic, nearestCoordinateGraphic, polygonBuilder, clickedLocationGraphic, this]
          (QMouseEvent& e)
  {
    const Point clickedLocation = m_mapView->screenToLocation(e.position().x(), e.position().y());
    // normalizing the geometry before performing geometric operations
    const Point normalizedPoint = geometry_cast<Point>(GeometryEngine::normalizeCentralMeridian(clickedLocation));

    clickedLocationGraphic->setGeometry(normalizedPoint);

    const ProximityResult nearestCoordinateResult = GeometryEngine::nearestCoordinate(polygonBuilder->toGeometry(), normalizedPoint);
    nearestCoordinateGraphic->setGeometry(nearestCoordinateResult.coordinate());

    const ProximityResult nearestVertexResult = GeometryEngine::nearestVertex(polygonBuilder->toGeometry(), normalizedPoint);
    nearestVertexGraphic->setGeometry(nearestVertexResult.coordinate());

    // get the distances to the nearest vertex and nearest coordinate, converted from feet to miles
    m_vertexDistance = nearestVertexResult.distance()/5280;
    m_coordinateDistance = nearestCoordinateResult.distance()/5280;

    e.accept();
    emit vertexDistanceCalculated();
    emit coordinateDistanceCalculated();
  });

  m_mapView->graphicsOverlays()->append(graphicsOverlay);
}

// [WriteFile Name=NearestVertex, Category=Geometry]
// [Legal]
// Copyright 2020 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 NEARESTVERTEX_H
#define NEARESTVERTEX_H

// Qt headers
#include <QObject>

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

Q_MOC_INCLUDE("MapQuickView.h")

class NearestVertex : public QObject
{
  Q_OBJECT

  Q_PROPERTY(Esri::ArcGISRuntime::MapQuickView* mapView READ mapView WRITE setMapView NOTIFY mapViewChanged)
  Q_PROPERTY(int vertexDistance READ vertexDistance NOTIFY vertexDistanceCalculated)
  Q_PROPERTY(int coordinateDistance READ coordinateDistance NOTIFY coordinateDistanceCalculated)

public:
  explicit NearestVertex(QObject* parent = nullptr);
  ~NearestVertex();

  static void init();

signals:
  void mapViewChanged();
  void vertexDistanceCalculated();
  void coordinateDistanceCalculated();

private:
  Esri::ArcGISRuntime::MapQuickView* mapView() const;
  int vertexDistance() const;
  int coordinateDistance() const;
  void setMapView(Esri::ArcGISRuntime::MapQuickView* mapView);
  void setupGraphics();

  Esri::ArcGISRuntime::Map* m_map = nullptr;
  Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr;
  int m_vertexDistance = 0;
  int m_coordinateDistance = 0;
};

#endif // NEARESTVERTEX_H

// [WriteFile Name=NearestVertex, Category=Geometry]
// [Legal]
// Copyright 2020 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 QtQuick.Controls
import Esri.Samples

Item {

    // add a mapView component
    MapView {
        id: view
        anchors.fill: parent

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

    // Declare the C++ instance which creates the map etc. and supply the view
    NearestVertexSample {
        id: model
        mapView: view
    }

    // Rectangle to display distances
    Rectangle
    {
        width: childrenRect.width
        height: childrenRect.height
        color: "white"
        border.color: "black"
        border.width: 2
        Label {
            id: distancesLabel
            text: "Vertex distance: " + model.vertexDistance + " mi\nCoordinate distance: " + model.coordinateDistance + " mi";
            font.pointSize: 14
            padding: 5
        }
    }
}

// [Legal]
// Copyright 2020 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 "NearestVertex.h"

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

// Qt headers
#include <QDir>
#include <QGuiApplication>
#include <QQmlApplicationEngine>

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

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

  // 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
  NearestVertex::init();

  // Initialize application view
  QQmlApplicationEngine engine;
  // Add the import Path
  engine.addImportPath(QDir(QCoreApplication::applicationDirPath()).filePath("qml"));

#ifdef ARCGIS_RUNTIME_IMPORT_PATH_2
  engine.addImportPath(ARCGIS_RUNTIME_IMPORT_PATH_2);
#endif

  // Set the source
  engine.load(QUrl("qrc:/Samples/Geometry/NearestVertex/main.qml"));

  return app.exec();
}

// Copyright 2020 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.

import QtQuick.Controls
import Esri.Samples

ApplicationWindow {
    visible: true
    width: 800
    height: 600

    NearestVertex {
        anchors.fill: parent
    }
}