Query map image sublayer

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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
// [WriteFile Name=QueryMapImageSublayer, Category=Layers]
// [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

#include "QueryMapImageSublayer.h"

#include "Basemap.h"
#include "Map.h"
#include "MapQuickView.h"
#include "ArcGISMapImageLayer.h"
#include "ArcGISMapImageSublayer.h"
#include "SimpleFillSymbol.h"
#include "SimpleLineSymbol.h"
#include "SimpleMarkerSymbol.h"
#include "QueryParameters.h"
#include "Graphic.h"
#include "GraphicsOverlay.h"
#include "GraphicListModel.h"
#include "Error.h"
#include "MapTypes.h"
#include "GraphicsOverlayListModel.h"
#include "GraphicListModel.h"
#include "SymbolTypes.h"
#include "TaskWatcher.h"
#include "LayerListModel.h"
#include "ArcGISSublayerListModel.h"
#include "FeatureQueryResult.h"
#include "FeatureIterator.h"
#include "Feature.h"
#include "SpatialReference.h"
#include "Viewpoint.h"
#include "Point.h"
#include "ServiceFeatureTable.h"
#include "Envelope.h"

#include <QUuid>

using namespace Esri::ArcGISRuntime;

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

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

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

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

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

  // add map image layer
  m_usaImageLayer = new ArcGISMapImageLayer(QUrl("https://sampleserver6.arcgisonline.com/arcgis/rest/services/USA/MapServer"), this);
  m_map->operationalLayers()->append(m_usaImageLayer);

  // add a graphics overlay
  m_selectionOverlay = new GraphicsOverlay(this);
  m_mapView->graphicsOverlays()->append(m_selectionOverlay);

  // create symbols
  createSymbols();

  // connect signals
  connectSignals();

  // set initial viewpoint
  Viewpoint vp(Point(-12716000, 4170400, SpatialReference::webMercator()), 6000000 /*scale*/);
  m_map->setInitialViewpoint(vp);

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

void QueryMapImageSublayer::connectSignals()
{
  connect(m_usaImageLayer, &ArcGISMapImageLayer::loadTablesAndLayersCompleted, this, [this](const QUuid&)
  {
    ArcGISSublayerListModel* sublayers = m_usaImageLayer->mapImageSublayers();
    if (sublayers->size() < 4)
      return;

    // get the sublayer's tables
    m_citiesTable = dynamic_cast<ArcGISMapImageSublayer*>(sublayers->at(0))->table();
    m_statesTable = dynamic_cast<ArcGISMapImageSublayer*>(sublayers->at(2))->table();
    m_countiesTable = dynamic_cast<ArcGISMapImageSublayer*>(sublayers->at(3))->table();

    // connect to city sublayer query signal
    connect(m_citiesTable, &ServiceFeatureTable::queryFeaturesCompleted, this, [this](const QUuid&, FeatureQueryResult* result)
    {
      addResultsAsGraphics(result, m_citySymbol);
      delete result;
    });

    // connect to county sublayer query signal
    connect(m_countiesTable, &ServiceFeatureTable::queryFeaturesCompleted, this, [this](const QUuid&, FeatureQueryResult* result)
    {
      addResultsAsGraphics(result, m_countySymbol);
      delete result;
    });

    // connect to states sublayer query signal
    connect(m_statesTable, &ServiceFeatureTable::queryFeaturesCompleted, this, [this](const QUuid&, FeatureQueryResult* result)
    {
      addResultsAsGraphics(result, m_stateSymbol);
      delete result;
    });
  });

  connect(m_usaImageLayer, &ArcGISMapImageLayer::doneLoading, this, [this](const Error& e)
  {
    if (!e.isEmpty())
      return;

    // load the sublayers and tables of the map image layer
    m_usaImageLayer->loadTablesAndLayers();
  });
}

void QueryMapImageSublayer::createSymbols()
{
  // create symbol for city selection
  m_citySymbol = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Circle, QColor("red"), 16.0f /*size*/, this);

  // create symbol for county selection
  SimpleLineSymbol* countyOutline = new SimpleLineSymbol(SimpleLineSymbolStyle::Dash, QColor("cyan"), 2.0f /*width*/, this);
  m_countySymbol = new SimpleFillSymbol(SimpleFillSymbolStyle::DiagonalCross, QColor("cyan"), countyOutline, this);

  // create symbol for state selection
  SimpleLineSymbol* stateOutline = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor("darkcyan"), 6.0f /*width*/, this);
  m_stateSymbol = new SimpleFillSymbol(SimpleFillSymbolStyle::Null, QColor("transparent"), stateOutline, this);
}

void QueryMapImageSublayer::addResultsAsGraphics(FeatureQueryResult* result, Symbol* symbol)
{
  // get the iterator of features
  FeatureIterator iter = result->iterator();

  // Create local parent
  QObject localParent;

  // add a graphic for each feature
  while (iter.hasNext())
  {
    Feature* feat = iter.next(&localParent);
    Graphic* graphic = new Graphic(feat->geometry(), symbol, this);
    m_selectionOverlay->graphics()->append(graphic);
  }
}

void QueryMapImageSublayer::query(const QString& whereClause)
{
  if (!m_citiesTable || !m_countiesTable || !m_statesTable || !m_mapView || !m_selectionOverlay)
    return;

  // clear & delete previous graphics
  GraphicListModel* graphics = m_selectionOverlay->graphics();
  const int graphicSize = graphics->size();
  for (int i = 0; i < graphicSize; i++)
  {
    delete graphics->at(i);
  }
  graphics->clear();

  // create the parameters
  QueryParameters queryParams;
  queryParams.setGeometry(m_mapView->currentViewpoint(ViewpointType::BoundingGeometry).targetGeometry().extent());
  queryParams.setWhereClause(whereClause);

  // query the feature tables
  m_citiesTable->queryFeatures(queryParams);
  m_countiesTable->queryFeatures(queryParams);
  m_statesTable->queryFeatures(queryParams);
}