Feature layer (dictionary renderer)

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
// [WriteFile Name=FeatureLayerDictionaryRenderer, Category=Features]
// [Legal]
// Copyright 2016 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 "FeatureLayerDictionaryRenderer.h"

#include "DictionaryRenderer.h"
#include "FeatureLayer.h"
#include "Geodatabase.h"
#include "GeodatabaseFeatureTable.h"
#include "GeometryEngine.h"
#include "Map.h"
#include "MapQuickView.h"
#include "DictionarySymbolStyle.h"
#include "MapTypes.h"
#include "LayerListModel.h"
#include "Envelope.h"

#include <QFuture>
#include <QtCore/qglobal.h>
#include <QStandardPaths>

using namespace Esri::ArcGISRuntime;

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

  #ifdef Q_OS_IOS
    dataPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
  #else
    dataPath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
  #endif

    return dataPath;
  }
} // namespace

FeatureLayerDictionaryRenderer::FeatureLayerDictionaryRenderer(QQuickItem* parent) :
  QQuickItem(parent),
  m_dataPath(defaultDataPath() + "/ArcGIS/Runtime/Data")
{
}

FeatureLayerDictionaryRenderer::~FeatureLayerDictionaryRenderer() = default;

void FeatureLayerDictionaryRenderer::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<FeatureLayerDictionaryRenderer>("Esri.Samples", 1, 0, "FeatureLayerDictionaryRendererSample");
}

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

  m_mapView = findChild<MapQuickView*>("mapView");
  // Create a map using the topo basemap
  Map* map = new Map(BasemapStyle::ArcGISTopographic, this);
  // set map on the map view
  m_mapView->setMap(map);

  m_geodatabase = new Geodatabase(m_dataPath + "/geodatabase/militaryoverlay.geodatabase", this);

  connect(m_geodatabase, &Geodatabase::loadStatusChanged, this, [this](LoadStatus gdbLoadStatus)
  {
    if (gdbLoadStatus == LoadStatus::Loaded)
    {
      /**
             * If the field names in your data don't match the contents of DictionarySymbolStyle::symbologyFieldNames(),
             * you must add key-value pairs to a QMap<QString, QString> and include this QMap when calling the
             * DictionaryRenderer constructor. The keys and values are like this:
             *
             *   "dictionaryFieldName1": "myFieldName1"
             *   "dictionaryFieldName2": "myFieldName2"
             *
             * The same principle applies to DictionarySymbolStyle::textFieldNames() for text attributes that appear
             * as part of military symbols.
             *
             * The following commented-out code demonstrates one way to do it, in a scenario where the dictionary
             * expects the field name "identity" but the database table contains the field "affiliation" instead,
             * and where the dictionary expects the field name "uniquedesignation" but the database table contains
             * the field "uniqueId" instead.
             */
      //            QMap<QString, QString> symbologyFieldOverrides;
      //            QMap<QString, QString> textFieldOverrides;
      //            symbologyFieldOverrides["identity"] = "affiliation";
      //            textFieldOverrides["uniquedesignation"] = "uniqueId";

      //! [Create Dictionary Symbol Style Cpp]
      const QString specType = QStringLiteral("mil2525d");
      const QString stylePath = m_dataPath + "/styles/arcade_style/mil2525d.stylx";
      DictionarySymbolStyle* dictionarySymbolStyle = DictionarySymbolStyle::createFromFile(stylePath, this);
      //! [Create Dictionary Symbol Style Cpp]

      Q_UNUSED(specType)

      const auto tables = m_geodatabase->geodatabaseFeatureTables();
      for (GeodatabaseFeatureTable* table : tables)
      {
        //! [Apply Dictionary Renderer Feature Layer Cpp]
        // Create a layer and set the feature table
        FeatureLayer* layer = new FeatureLayer(table, this);

        // Create a dictionary renderer and apply to the layer
        DictionaryRenderer* renderer = new DictionaryRenderer(dictionarySymbolStyle, this);
        layer->setRenderer(renderer);
        //! [Apply Dictionary Renderer Feature Layer Cpp]

        // Check to see if all layers have loaded
        connect(layer, &FeatureLayer::loadStatusChanged, this, [this](LoadStatus layerLoadStatus)
        {
          if (layerLoadStatus == LoadStatus::Loaded)
          {
            m_loadedLayerCount++;

            if (m_loadedLayerCount == m_geodatabase->geodatabaseFeatureTables().length())
            {
              /**
               * If we get here, all the layers loaded. Union the extents and set
               * the viewpoint.
               */
              LayerListModel* layers = m_mapView->map()->operationalLayers();
              if (layers->size() > 0)
              {
                Envelope bbox = layers->at(0)->fullExtent();
                for (int j = 1; j < layers->size(); j++)
                {
                  bbox = GeometryEngine::unionOf(bbox, layers->at(j)->fullExtent());
                }
                m_mapView->setViewpointGeometryAsync(bbox, 100);
              }

              emit allLayersLoaded();
            }
          }
        }, Qt::DirectConnection);

        /**
                 * Add the layer to the map. Inserting at index 0 puts the layer below previously added
                 * layers.
                 */
        m_mapView->map()->operationalLayers()->insert(0, layer);
      }
    }
  });
  m_geodatabase->load();
}