Display dimensions

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
200
201
202
203
204
205
206
207
208
209
// [WriteFile Name=DisplayDimensions, Category=Layers]
// [Legal]
// Copyright 2021 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 "DisplayDimensions.h"

#include "DimensionLayer.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MobileMapPackage.h"
#include "Error.h"
#include "MapTypes.h"
#include "LayerListModel.h"

#include <QStandardPaths>

using namespace Esri::ArcGISRuntime;

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

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

    return dataPath;
  }

  // Sample MMPK location.
  const QString edinburghPylonFilePath {"/ArcGIS/Runtime/Data/mmpk/Edinburgh_Pylon_Dimensions.mmpk"};
}

DisplayDimensions::DisplayDimensions(QObject* parent /* = nullptr */):
  QObject(parent)
{
  QString mapPackagePath = defaultDataPath() + edinburghPylonFilePath;
  m_mmpk = new MobileMapPackage(mapPackagePath, this);

  // Make connections between the mmpk's doneLoading and errorOccurred signal and the addMapToMapView and handleError methods respectively.
  connect(m_mmpk, &MobileMapPackage::doneLoading, this, &DisplayDimensions::addMapToMapView);
  connect(m_mmpk, &MobileMapPackage::errorOccurred, this, &DisplayDimensions::handleError);

  // Load the mmpk.
  m_mmpk->load();
}

DisplayDimensions::~DisplayDimensions() = default;

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

void DisplayDimensions::addMapToMapView(const Error& error)
{
  // If no errors have occurred, the mmpk is loaded, and there is only one map in the mmpk, the map
  // in the mmpk can be assigned to the MapView. Any errors will be managed by the handleError method.
  if (error.isEmpty() && m_mmpk->loadStatus() == LoadStatus::Loaded && m_mmpk->maps().count() > 0)
  {
    // Enable the checkboxes.
    setDimensionsAvailable(true);

    // Assign the map in the mmpk to m_map.
    m_map = m_mmpk->maps().at(0);

    // Set the minimum scale to prevent zooming out too far.
    m_map->setMinScale(35000);

    // Check to ensure that m_mapView has been initialised properly.
    if (m_mapView != nullptr)
    {
      // Set m_map as the MapView's map.
      m_mapView->setMap(m_map);
    }

    // From the map's layers, find the Dimension Layer.
    findDimensionLayer();
  }
  else
  {
    // If the map hasn't loaded or an error has occurred, disable the checkboxes in the UI.
    setDimensionsAvailable(false);
  }
}

void DisplayDimensions::findDimensionLayer()
{
  LayerListModel* layers = m_mapView->map()->operationalLayers();

  for (Layer* layer : *layers)
  {
    if (layer->layerType() == LayerType::DimensionLayer)
    {
      // The current layer, which is the DimensionLayer, has type Layer*. Ths needs to be converted to a DimensionLayer*.
      m_dimensionLayer = static_cast<DimensionLayer*>(layer);
      // Use the name of the Dimension Layer to define the title of the UI element.
      setDimensionLayerName(m_dimensionLayer->name());
      // There is only one Dimension Layer, so we can break out of the loop.
      break;
    }
  }
}

void DisplayDimensions::handleError(const Error& error)
{
  if (error.additionalMessage().isEmpty())
    setErrorMessage(error.message());
  else
    setErrorMessage(error.message() + "\n" + error.additionalMessage());
}

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

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

  m_mapView = mapView;

  if (m_map)
    m_mapView->setMap(m_map);

  emit mapViewChanged();
}

QString DisplayDimensions::errorMessage()
{
  return m_errorMessage;
}

void DisplayDimensions::setErrorMessage(const QString& message)
{
  m_errorMessage = message;
  emit errorMessageChanged();
}

QString DisplayDimensions::dimensionLayerName() const
{
  return m_dimensionLayerName;
}

void DisplayDimensions::setDimensionLayerName(const QString& name)
{
  m_dimensionLayerName = name;
  emit dimensionLayerNameChanged();
}

bool DisplayDimensions::dimensionLayerVisible() const
{
  return m_dimensionLayer && m_dimensionLayer->isVisible();
}

void DisplayDimensions::setDimensionLayerVisible(bool visible)
{
  m_dimensionLayer->setVisible(visible);
}

bool DisplayDimensions::useDefinitionExpression() const
{
  return m_dimensionLayer && !m_dimensionLayer->definitionExpression().isEmpty();
}

void DisplayDimensions::setUseDefinitionExpression(bool applied)
{
  if (applied)
    m_dimensionLayer->setDefinitionExpression("DIMLENGTH >= 450");
  else
    m_dimensionLayer->setDefinitionExpression("");
}

bool DisplayDimensions::dimensionsAvailable()
{
  return m_dimensionsAvailable;
}

void DisplayDimensions::setDimensionsAvailable(bool status)
{
  m_dimensionsAvailable = status;
  emit dimensionsAvailableChanged();
}