Identify raster cell

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
// [WriteFile Name=IdentifyRasterCell, Category=Layers]
// [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

#include "IdentifyRasterCell.h"

#include "CalloutData.h"
#include "Map.h"
#include "MapQuickView.h"
#include "Raster.h"
#include "RasterCell.h"
#include "RasterLayer.h"

#include <memory>
#include <QDir>
#include <QString>

#ifdef Q_OS_IOS
#include <QStandardPaths>
#endif // Q_OS_IOS

using namespace Esri::ArcGISRuntime;

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

#ifdef Q_OS_ANDROID
  dataPath = "/sdcard";
#elif defined Q_OS_IOS
  dataPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
#else
  dataPath = QDir::homePath();
#endif

  return dataPath;
}
} // namespace

IdentifyRasterCell::IdentifyRasterCell(QObject* parent /* = nullptr */):
  QObject(parent),
  m_map(new Map(BasemapStyle::ArcGISOceans, this))
{
  // initialize the raster layer
  const QString filepath = defaultDataPath() + "/ArcGIS/Runtime/Data/raster/SA_EVI_8Day_03May20/SA_EVI_8Day_03May20.tif";
  Raster* raster = new Raster(filepath, this);
  m_rasterLayer = new RasterLayer(raster, this);

  m_map->operationalLayers()->append(m_rasterLayer);
}

IdentifyRasterCell::~IdentifyRasterCell() = default;

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

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

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

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

  connectSignals();

  emit mapViewChanged();
}

void IdentifyRasterCell::connectSignals()
{
  connect(m_rasterLayer, &Layer::doneLoading, this, [this](Error error)
  {
    if (!error.isEmpty())
    {
      qDebug() << error.message() << error.additionalMessage();
      return;
    }

    m_mapView->setViewpointGeometry(m_rasterLayer->fullExtent());
  });

  connect(m_mapView, &MapQuickView::identifyLayerCompleted, this, [this](QUuid, IdentifyLayerResult* rawIdentifyResult)
  {
    const auto identifyResult = std::unique_ptr<IdentifyLayerResult>(rawIdentifyResult);
    const auto elements = identifyResult->geoElements();
    for (GeoElement* geoElement : elements)
    {
      if (RasterCell* rasterCell = dynamic_cast<RasterCell*>(geoElement))
      {
        QString calloutString;
        const AttributeListModel* attributes = rasterCell->attributes();
        const QStringList attributeNames = rasterCell->attributes()->attributeNames();

        for (int i = 0; i < attributeNames.size(); ++i)
        {
          const QString value = QVariant((*attributes)[attributeNames[i]]).toString();
          calloutString.append(attributeNames[i] + ": " + value + "\n");
        }

        const double xPoint = rasterCell->geometry().extent().xMin();
        const double yPoint = rasterCell->geometry().extent().yMin();

        calloutString.append("X: " + QString::number(xPoint, 'f', 2) + " Y: " + QString::number(yPoint, 'f', 2));

        m_mapView->calloutData()->setLocation(m_clickedPoint);
        m_mapView->calloutData()->setDetail(calloutString);
        m_mapView->calloutData()->setVisible(true);
        m_calloutData = m_mapView->calloutData();
        emit calloutDataChanged();
      }
    }
  });

  connect(m_mapView, &MapQuickView::mouseClicked, this, [this](const QMouseEvent& e)
  {
    m_mapView->identifyLayer(m_rasterLayer, e.x(), e.y(), 10, false, 1);
    m_clickedPoint = m_mapView->screenToLocation(e.x(), e.y());
  });

  connect(m_mapView, &MapQuickView::mousePressedAndHeld, this, [this](const QMouseEvent& e)
  {
    m_mapView->identifyLayer(m_rasterLayer, e.x(), e.y(), 10, false, 1);
    m_clickedPoint = m_mapView->screenToLocation(e.x(), e.y());
    m_mousePressed = true;
  });

  connect(m_mapView, &MapQuickView::mouseReleased, this, [this](QMouseEvent)
  {
    m_mousePressed = false;
  });

  // if mouse is moved after press-and-hold, then update callout on-the-fly
  connect(m_mapView, &MapQuickView::mouseMoved, this, [this](const QMouseEvent& e)
  {
    if (m_mousePressed)
    {
      m_mapView->identifyLayer(m_rasterLayer, e.x(), e.y(), 10, false, 1);
      m_clickedPoint = m_mapView->screenToLocation(e.x(), e.y());
    }
  });
}

CalloutData* IdentifyRasterCell::calloutData() const
{
  return m_calloutData;
}