Display subtype feature layer

// [WriteFile Name=DisplaySubtypeFeatureLayer, Category=Layers]
// [Legal]
// Copyright 2019 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 "DisplaySubtypeFeatureLayer.h"

// ArcGIS Maps SDK headers
#include "ArcGISRuntimeEnvironment.h"
#include "Authentication/AuthenticationManager.h"
#include "Authentication/ArcGISAuthenticationChallenge.h"
#include "Authentication/TokenCredential.h"
#include "Envelope.h"
#include "Error.h"
#include "ErrorException.h"
#include "FeatureLayer.h"
#include "LabelDefinition.h"
#include "LabelDefinitionListModel.h"
#include "LayerListModel.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MapTypes.h"
#include "ServiceFeatureTable.h"
#include "ServiceTypes.h"
#include "SimpleLabelExpression.h"
#include "SimpleMarkerSymbol.h"
#include "SimpleRenderer.h"
#include "SpatialReference.h"
#include "SubtypeFeatureLayer.h"
#include "SubtypeSublayer.h"
#include "SymbolTypes.h"
#include "TextSymbol.h"
#include "Viewpoint.h"

#include <QFuture>

using namespace Esri::ArcGISRuntime;
using namespace Esri::ArcGISRuntime::Authentication;

DisplaySubtypeFeatureLayer::DisplaySubtypeFeatureLayer(QObject* parent /* = nullptr */):
  ArcGISAuthenticationChallengeHandler(parent),
  m_map(new Map(BasemapStyle::ArcGISStreetsNight, this)),
  m_alternateRenderer(new SimpleRenderer(new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Diamond, QColor(Qt::magenta), 20, this), this))
{
  ArcGISRuntimeEnvironment::authenticationManager()->setArcGISAuthenticationChallengeHandler(this);

  m_busy = true;

  // create the feature table
  ServiceFeatureTable* featureTable = new ServiceFeatureTable(QUrl("https://sampleserver7.arcgisonline.com/server/rest/services/UtilityNetwork/NapervilleElectric/FeatureServer/0"), this);
  // create the feature layer using the feature table
  m_subtypeFeatureLayer = new SubtypeFeatureLayer(featureTable, this);

  // add the feature layer to the map
  m_map->operationalLayers()->append(m_subtypeFeatureLayer);

  // set the viewpoint to Naperville, Illinois
  m_map->setInitialViewpoint(Viewpoint(Envelope(-9812691.11079696, 5128687.20710657, -9812377.9447607, 5128865.36767282, SpatialReference::webMercator())));

  // when subtype feature layer is loaded get the subtype sublayer street lights and define its labels
  connect(m_subtypeFeatureLayer, &SubtypeFeatureLayer::doneLoading, this, &DisplaySubtypeFeatureLayer::getSubtypeSublayerAndDefineLabels);
}

DisplaySubtypeFeatureLayer::~DisplaySubtypeFeatureLayer() = default;

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

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

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

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

  connect(m_mapView, &MapQuickView::mapScaleChanged, this, [this]()
  {
    m_mapScale = m_mapView->mapScale();
    emit mapScaleChanged();
  });

  emit mapViewChanged();
}

void DisplaySubtypeFeatureLayer::getSubtypeSublayerAndDefineLabels(const Error& e)
{
  if (!e.isEmpty())
    return;

  m_busy = false;
  emit busyChanged();

  if (!m_subtypeFeatureLayer)
    return;

  // get the Street Light sublayer and define its labels
  m_subtypeSublayer = m_subtypeFeatureLayer->sublayerWithSubtypeName("Street Light", this);
  m_labelDefinition = createLabelDefinition();

  if (!m_labelDefinition || !m_subtypeSublayer)
    return;

  m_subtypeSublayer->labelDefinitions()->append(m_labelDefinition);
  m_subtypeSublayer->setLabelsEnabled(true);

  // get the original renderer of the sublayer
  m_originalRenderer = m_subtypeSublayer->renderer();

  // Set a default minimum scale.
  m_subtypeSublayer->setMinScale(3000.0);
  m_sublayerMinScale = m_subtypeSublayer->minScale();
  emit sublayerMinScaleChanged();
}

void DisplaySubtypeFeatureLayer::switchSublayerVisibility()
{
  if (m_subtypeSublayer)
    m_subtypeSublayer->setVisible(!m_subtypeSublayer->isVisible());
}

void DisplaySubtypeFeatureLayer::setOringalRenderer()
{
  if (m_subtypeSublayer)
    m_subtypeSublayer->setRenderer(m_originalRenderer);
}

void DisplaySubtypeFeatureLayer::setAlternativeRenderer()
{
  if (m_subtypeSublayer)
    m_subtypeSublayer->setRenderer(m_alternateRenderer);
}

void DisplaySubtypeFeatureLayer::setSublayerMinScale()
{
  if (!m_subtypeSublayer)
    return;

  const double currentScale = m_mapView->mapScale();
  m_subtypeSublayer->setMinScale(currentScale);
  m_sublayerMinScale = currentScale;
  emit sublayerMinScaleChanged();
}

LabelDefinition* DisplaySubtypeFeatureLayer::createLabelDefinition()
{
  SimpleLabelExpression* labelExpression = new SimpleLabelExpression("[nominalvoltage]", this);

  TextSymbol* textSymbol = new TextSymbol(this);
  textSymbol->setSize(14);
  textSymbol->setColor(Qt::blue);
  textSymbol->setHaloColor(Qt::white);
  textSymbol->setHaloWidth(3);
  textSymbol->setHorizontalAlignment(HorizontalAlignment::Center);
  textSymbol->setVerticalAlignment(VerticalAlignment::Middle);

  LabelDefinition* labelDefinition = new LabelDefinition(labelExpression, textSymbol, this);
  labelDefinition->setPlacement(LabelingPlacement::PointAboveRight);
  labelDefinition->setUseCodedValues(true);
  return labelDefinition;
}

void DisplaySubtypeFeatureLayer::handleArcGISAuthenticationChallenge(ArcGISAuthenticationChallenge* challenge)
{
  TokenCredential::createWithChallengeAsync(challenge, "viewer01", "I68VGU^nMurF", {}, this).then(this, [challenge](TokenCredential* tokenCredential)
  {
    challenge->continueWithCredential(tokenCredential);
  }).onFailed(this, [challenge](const ErrorException& e)
  {
    challenge->continueWithError(e.error());
  });
}

// [WriteFile Name=DisplaySubtypeFeatureLayer, Category=Layers]
// [Legal]
// Copyright 2019 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 DISPLAYSUBTYPEFEATURELAYER_H
#define DISPLAYSUBTYPEFEATURELAYER_H

// ArcGIS Maps SDK headers
#include "SubtypeSublayer.h"
#include "Authentication/ArcGISAuthenticationChallengeHandler.h"

namespace Esri::ArcGISRuntime
{
class FeatureLayer;
class LabelDefinition;
class Map;
class MapQuickView;
class Renderer;
class SimpleRenderer;
class SubtypeFeatureLayer;
class SubtypeSublayer;
}

namespace Esri::ArcGISRuntime::Authentication
{
  class ArcGISAuthenticationChallenge;
}

Q_MOC_INCLUDE("MapQuickView.h")

class DisplaySubtypeFeatureLayer : public Esri::ArcGISRuntime::Authentication::ArcGISAuthenticationChallengeHandler
{
  Q_OBJECT

  Q_PROPERTY(Esri::ArcGISRuntime::MapQuickView* mapView READ mapView WRITE setMapView NOTIFY mapViewChanged)
  Q_PROPERTY(double mapScale MEMBER m_mapScale NOTIFY mapScaleChanged)
  Q_PROPERTY(double sublayerMinScale MEMBER m_sublayerMinScale NOTIFY sublayerMinScaleChanged)
  Q_PROPERTY(bool busy MEMBER m_busy NOTIFY busyChanged)

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

  Q_INVOKABLE void switchSublayerVisibility();
  Q_INVOKABLE void setOringalRenderer();
  Q_INVOKABLE void setAlternativeRenderer();
  Q_INVOKABLE void setSublayerMinScale();

  static void init();

signals:
  void mapViewChanged();
  void mapScaleChanged();
  void sublayerMinScaleChanged();
  void busyChanged();

private slots:
  void getSubtypeSublayerAndDefineLabels(const Esri::ArcGISRuntime::Error& e);

private:
  Esri::ArcGISRuntime::MapQuickView* mapView() const;
  void setMapView(Esri::ArcGISRuntime::MapQuickView* mapView);
  Esri::ArcGISRuntime::LabelDefinition* createLabelDefinition();

  void handleArcGISAuthenticationChallenge(Esri::ArcGISRuntime::Authentication::ArcGISAuthenticationChallenge* challenge) override;

  Esri::ArcGISRuntime::Map* m_map = nullptr;
  Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr;
  Esri::ArcGISRuntime::SubtypeFeatureLayer* m_subtypeFeatureLayer = nullptr;
  Esri::ArcGISRuntime::SubtypeSublayer* m_subtypeSublayer = nullptr;
  Esri::ArcGISRuntime::LabelDefinition* m_labelDefinition = nullptr;
  Esri::ArcGISRuntime::Renderer* m_originalRenderer = nullptr;
  Esri::ArcGISRuntime::SimpleRenderer* m_alternateRenderer = nullptr;

  double m_mapScale = 0.0;
  double m_sublayerMinScale = 0.0;
  bool m_busy = false;
};

#endif // DISPLAYSUBTYPEFEATURELAYER_H

// [WriteFile Name=DisplaySubtypeFeatureLayer, Category=Layers]
// [Legal]
// Copyright 2019 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 QtQuick.Layouts
import QtQuick.Shapes
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();
        }

        Rectangle {
            id: controlsBox
            anchors {
                left: parent.left
                top: parent.top
                margins: 3
            }
            width: childrenRect.width
            height: childrenRect.height
            color: "lightgrey"
            opacity: 0.8
            radius: 5

            // catch mouse signals from propagating to parent
            MouseArea {
                anchors.fill: parent
                onClicked: mouse => mouse.accepted = true
                onWheel: wheel => wheel.accepted = true
            }

            ColumnLayout {
                id: controlItemsLayout

                CheckBox {
                    text: qsTr("Show sublayer")
                    Layout.margins: 2
                    Layout.alignment: Qt.AlignLeft
                    checked: true
                    enabled: !busy.visible
                    onCheckedChanged: model.switchSublayerVisibility();
                }

                RadioButton {
                    text: qsTr("Show original renderer")
                    Layout.margins: 2
                    Layout.alignment: Qt.AlignLeft
                    checked: true
                    enabled: !busy.visible
                    onCheckedChanged: {
                        if (checked)
                            model.setOringalRenderer();
                    }
                }

                RadioButton {
                    text: qsTr("Show alternative renderer")
                    Layout.margins: 2
                    Layout.alignment: Qt.AlignLeft
                    enabled: !busy.visible
                    onCheckedChanged: {
                        if (checked)
                            model.setAlternativeRenderer();
                    }
                }

                Shape {
                    id: pageBreak
                    height: 2
                    ShapePath {
                        strokeWidth: 1
                        strokeColor: "black"
                        strokeStyle: ShapePath.SolidLine
                        startX: 2; startY: 0
                        PathLine { x: controlItemsLayout.width - 2 ; y: 0 }
                    }
                }

                Text {
                    text: qsTr("Current map scale: 1:%1".arg(Math.round(model.mapScale)))
                    Layout.margins: 2
                    Layout.alignment: Qt.AlignLeft
                }

                Text {
                    text: qsTr("Sublayer min scale: 1:%1".arg(model.sublayerMinScale > 0.0 ? Math.round(model.sublayerMinScale) : "not set"))
                    Layout.margins: 2
                    Layout.alignment: Qt.AlignLeft
                }

                Button {
                    text: qsTr("Set sublayer minimum scale")
                    Layout.margins: 2
                    Layout.alignment: Qt.AlignLeft
                    enabled: !busy.visible
                    onClicked: model.setSublayerMinScale();
                }
            }
        }

        BusyIndicator {
            id: busy
            anchors.centerIn: parent
            visible: model.busy
        }
    }

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