Read symbols from a mobile style

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
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
// [WriteFile Name=ReadSymbolsFromMobileStyle, Category=DisplayInformation]
// [Legal]
// Copyright 2019 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 "ReadSymbolsFromMobileStyle.h"

#include "Map.h"
#include "MapQuickView.h"
#include "GraphicsOverlay.h"
#include "Graphic.h"
#include "SymbolStyle.h"
#include "MultilayerSymbol.h"
#include "Point.h"
#include "MultilayerPointSymbol.h"
#include "SymbolImageProvider.h"
#include "SymbolStyleSearchResultListModel.h"
#include "MapTypes.h"
#include "Error.h"
#include "SymbolStyleSearchParameters.h"
#include "SymbolLayerListModel.h"
#include "SymbolLayer.h"
#include "GraphicsOverlayListModel.h"
#include "GraphicListModel.h"
#include "SymbolStyleSearchResult.h"

#include <QFuture>
#include <QObject>
#include <QQmlContext>
#include <QTemporaryDir>
#include <QtCore/qglobal.h>
#include <QStandardPaths>

using namespace Esri::ArcGISRuntime;

constexpr int hatIndex = 0;
constexpr int mouthIndex = 1;
constexpr int eyeIndex = 2;
constexpr int faceIndex = 3;

// 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

ReadSymbolsFromMobileStyle::ReadSymbolsFromMobileStyle(QObject* parent /* = nullptr */) :
  QObject(parent),
  m_map(new Map(BasemapStyle::ArcGISTopographic, this)),
  m_graphicParent(new QObject())
{
  m_symbolStyle = new SymbolStyle(defaultDataPath() + "/ArcGIS/Runtime/Data/styles/emoji-mobile.stylx", this);

  // Load the style
  connect(m_symbolStyle, &SymbolStyle::doneLoading, this, [this](const Error& e)
  {
    if (!e.isEmpty())
      return;
    searchSymbolLayer("Hat", hatIndex);
    searchSymbolLayer("Mouth", mouthIndex);
    searchSymbolLayer("Eyes", eyeIndex);
    searchSymbolLayer("Face", faceIndex);
  });

  m_symbolStyle->load();
}

ReadSymbolsFromMobileStyle::~ReadSymbolsFromMobileStyle() = default;

void ReadSymbolsFromMobileStyle::init()
{
  // Register the map view for QML
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<ReadSymbolsFromMobileStyle>("Esri.Samples", 1, 0, "ReadSymbolsFromMobileStyleSample");
  qmlRegisterUncreatableType<SymbolStyleSearchResultListModel>("Esri.Samples", 1, 0, "SymbolStyleSearchResultListModel", "SymbolStyleSearchResultListModel is uncreateable");
}

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

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

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

  // Get the image provider from the QML Engine
  QQmlEngine* engine = QQmlEngine::contextForObject(this)->engine();
  engine->addImageProvider(SymbolImageProvider::imageProviderId(), new SymbolImageProvider);
  m_symbolImageProvider = static_cast<SymbolImageProvider*>(engine->imageProvider(SymbolImageProvider::imageProviderId()));

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

  // connect to mouse clicked signal
  connect(m_mapView, &MapQuickView::mouseClicked, this, [this, overlay](QMouseEvent& mouseEvent)
  {
    if (!m_currentSymbol)
      return;

    const Point clickedPoint = m_mapView->screenToLocation(mouseEvent.position().x(), mouseEvent.position().y());
    Graphic* graphic = new Graphic(clickedPoint, m_currentSymbol, m_graphicParent.get());
    overlay->graphics()->append(graphic);
  });

  emit mapViewChanged();
}

// Clear the graphics from the overlay and delete each object
void ReadSymbolsFromMobileStyle::clearGraphics()
{
  if (!m_mapView)
    return;

  GraphicsOverlay* overlay = m_mapView->graphicsOverlays()->first();
  if (!overlay)
    return;

  // clear the list model
  overlay->graphics()->clear();

  // reset m_graphicsParent to delete all children
  m_graphicParent.reset(new QObject());
}

void ReadSymbolsFromMobileStyle::updateSymbol(int requestHatIndex, int requestMouthIndex, int requestEyeIndex, QColor color, int size)
{
  if (!m_symbolStyle || !hatResults() || !mouthResults() || !eyeResults() || !faceResults())
    return;

  // set the color and size members
  m_currentColor = color;
  m_symbolSize = size;

  // fetch the new symbol based on keys
  QStringList keys;
  keys.append(faceResults()->searchResults().at(0).key());
  keys.append(eyeResults()->searchResults().at(requestEyeIndex).key());
  keys.append(mouthResults()->searchResults().at(requestMouthIndex).key());
  keys.append(hatResults()->searchResults().at(requestHatIndex).key());
  m_symbolStyle->fetchSymbolAsync(keys).then(this,
  [this](Symbol* symbol)
  {
    if (m_currentSymbol)
      delete m_currentSymbol;

    // store the resulting symbol
    m_currentSymbol = static_cast<MultilayerPointSymbol*>(symbol);

    // ensure cast was successful
    if (!m_currentSymbol)
      return;

    // set the size
    m_currentSymbol->setSize(m_symbolSize);

    // set the color preferences per layer
    for (SymbolLayer* lyr : *(m_currentSymbol->symbolLayers()))
      lyr->setColorLocked(true);

    m_currentSymbol->symbolLayers()->at(0)->setColorLocked(false);

    // set the color
    m_currentSymbol->setColor(m_currentColor);

    // request symbol swatch
    m_currentSymbol->createSwatchAsync().then(this,
    [this](const QImage& img)
    {
      if (!m_symbolImageProvider)
        return;

      // convert the QUuid into a QString
      const QString imageId = QUuid().createUuid().toString(QUuid::StringFormat::WithoutBraces);

      // add the image to the provider
      m_symbolImageProvider->addImage(imageId, img);

      // update the URL with the unique id
      m_symbolImageUrl = QString("image://%1/%2").arg(SymbolImageProvider::imageProviderId(), imageId);

      // emit the signal to trigger the QML Image to update
      emit symbolImageUrlChanged();
    });

  });
}

SymbolStyleSearchResultListModel* ReadSymbolsFromMobileStyle::hatResults() const
{
  return m_models[hatIndex];
}

SymbolStyleSearchResultListModel* ReadSymbolsFromMobileStyle::mouthResults() const
{
  return m_models[mouthIndex];
}

SymbolStyleSearchResultListModel* ReadSymbolsFromMobileStyle::eyeResults() const
{
  return m_models[eyeIndex];
}

SymbolStyleSearchResultListModel* ReadSymbolsFromMobileStyle::faceResults() const
{
  return m_models[faceIndex];
}

void ReadSymbolsFromMobileStyle::searchSymbolLayer(const QString& category, int index)
{
  SymbolStyleSearchParameters params;
  params.setCategories({category});
  m_symbolStyle->searchSymbolsAsync(params).then(this,
  [this, index](SymbolStyleSearchResultListModel* results)
  {
    m_models[index] = results;
    emit symbolResultsChanged();
  });
}