Query features with Arcade expression

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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
// [WriteFile Name=QueryFeaturesWithArcadeExpression, Category=DisplayInformation]
// [Legal]
// Copyright 2022 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 "QueryFeaturesWithArcadeExpression.h"

// ArcGIS Maps SDK headers
#include "ArcGISFeature.h"
#include "ArcadeEvaluationResult.h"
#include "ArcadeEvaluator.h"
#include "ArcadeExpression.h"
#include "CalloutData.h"
#include "ExpressionTypes.h"
#include "IdentifyLayerResult.h"
#include "Layer.h"
#include "LayerListModel.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MapTypes.h"
#include "Point.h"
#include "Portal.h"
#include "PortalItem.h"

// Qt headers
#include <QFuture>
#include <QUuid>
#include <QVariantMap>

using namespace Esri::ArcGISRuntime;

QueryFeaturesWithArcadeExpression::QueryFeaturesWithArcadeExpression(QObject* parent /* = nullptr */):
  QObject(parent),
  m_map(new Map(BasemapStyle::ArcGISTopographic, this))
{
  Portal* portal = new Portal(QUrl("https://www.arcgis.com/"), this);
  PortalItem* portalItem = new PortalItem(portal, "14562fced3474190b52d315bc19127f6", this);

  // Create a map object using the portalItem
  m_map = new Map(portalItem, this);

  connect(m_map, &Map::doneLoading, this, [this]()
  {
    if (m_map->loadStatus() == LoadStatus::Loaded)
    {
      // Set the visibility of all but the RDT Beats layer to false to avoid cluttering the UI
      m_map->operationalLayers()->at(1)->setVisible(false);
      m_map->operationalLayers()->at(2)->setVisible(false);
      m_map->operationalLayers()->at(3)->setVisible(false);
    }
  });
}

QueryFeaturesWithArcadeExpression::~QueryFeaturesWithArcadeExpression() = default;

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

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

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

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

  m_mapView->calloutData()->setVisible(false);
  m_mapView->calloutData()->setTitle("RPD Beats");

  connect(m_mapView, &MapQuickView::mouseClicked, this, [this](QMouseEvent& mouseEvent){
    if (m_mapView->calloutData()->isVisible())
      m_mapView->calloutData()->setVisible(false);
    m_mapView->calloutData()->setDetail("");
    // Set callout position
    const Point mapPoint(m_mapView->screenToLocation(mouseEvent.position().x(), mouseEvent.position().y()));
    m_mapView->calloutData()->setLocation(mapPoint);

    m_mapView->identifyLayersAsync(mouseEvent.position(), 12, false).then(this,
    [this](const QList<IdentifyLayerResult*>& results)
    {
      if (results.empty())
        return;

      QList<GeoElement*> element_list = results.first()->geoElements();
      if (element_list.empty())
        return;

      GeoElement* element = element_list.at(0);
      ArcGISFeature* identifiedFeature = dynamic_cast<ArcGISFeature*>(element);
      m_mapView->calloutData()->setVisible(true);

      showEvaluatedArcadeInCallout(identifiedFeature);
    });

  });

  emit mapViewChanged();
}

void QueryFeaturesWithArcadeExpression::showEvaluatedArcadeInCallout(Feature* feature)
{
  QVariantMap profileVariables;
  profileVariables["$feature"] = QVariant::fromValue(feature);
  profileVariables["$map"] = QVariant::fromValue(m_map);

  const QString expressionValue =
      "var crimes = FeatureSetByName($map, 'Crime in the last 60 days');\n"
      "return Count(Intersects($feature, crimes));";

  ArcadeExpression expression {expressionValue};
  ArcadeEvaluator* evaluator = new ArcadeEvaluator(&expression, ArcadeProfile::FormCalculation, this);

  evaluator->evaluateAsync(profileVariables).then(this,
  [this](ArcadeEvaluationResult* arcadeEvaluationResult)
  {
    if (!arcadeEvaluationResult)
      return;

    QVariant evalResult = arcadeEvaluationResult->result();
    const int crimeCount = evalResult.toInt();
    m_mapView->calloutData()->setDetail("Crimes in the last 60 days: " + QString::number(crimeCount));
  });
}