Animate images with image overlay

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
// [WriteFile Name=AnimateImagesWithImageOverlay, Category=Scenes]
// [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 "AnimateImagesWithImageOverlay.h"

#include "ArcGISTiledElevationSource.h"
#include "ArcGISTiledLayer.h"
#include "Scene.h"
#include "SceneQuickView.h"
#include "ImageFrame.h"
#include "ImageOverlay.h"
#include "ImageOverlayListModel.h"
#include "SceneView.h"
#include "Envelope.h"
#include "Point.h"
#include "Camera.h"
#include "Viewpoint.h"
#include "Surface.h"
#include "ElevationSourceListModel.h"
#include "LayerListModel.h"
#include "SpatialReference.h"
#include "MapTypes.h"

// Qt headers
#include <QtCore/qglobal.h>
#include <QDir>
#include <QFile>
#include <QImage>
#include <QStandardPaths>
#include <QString>
#include <QTimer>

#include <memory>

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

using namespace Esri::ArcGISRuntime;

AnimateImagesWithImageOverlay::AnimateImagesWithImageOverlay(QObject* parent /* = nullptr */):
  QObject(parent),
  // Create a scene using the dark gray basemap
  m_scene(new Scene(BasemapStyle::ArcGISDarkGray, this)),
  m_dataPath(defaultDataPath() + "/ArcGIS/Runtime/Data/3D/ImageOverlay/PacificSouthWest"),
  m_dir(m_dataPath),
  m_images(m_dir.entryList(QStringList() << "*.png", QDir::Files)),
  m_imagesSize(m_images.size())
{
  // create a new elevation source from Terrain3D REST service
  ArcGISTiledElevationSource* elevationSource = new ArcGISTiledElevationSource(
        QUrl("https://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer"), this);


  // add the elevation source to the scene to display elevation
  m_scene->baseSurface()->elevationSources()->append(elevationSource);

}

AnimateImagesWithImageOverlay::~AnimateImagesWithImageOverlay() = default;

void AnimateImagesWithImageOverlay::init()
{
  // Register classes for QML
  qmlRegisterType<SceneQuickView>("Esri.Samples", 1, 0, "SceneView");
  qmlRegisterType<AnimateImagesWithImageOverlay>("Esri.Samples", 1, 0, "AnimateImagesWithImageOverlaySample");
}

SceneQuickView* AnimateImagesWithImageOverlay::sceneView() const
{
  return m_sceneView;
}

// Set the view (created in QML)
void AnimateImagesWithImageOverlay::setSceneView(SceneQuickView* sceneView)
{
  if (!sceneView || sceneView == m_sceneView)
    return;

  m_sceneView = sceneView;
  m_sceneView->setArcGISScene(m_scene);

  emit sceneViewChanged();

  setupImageOverlay();
}

void AnimateImagesWithImageOverlay::setupImageOverlay()
{
  // create an envelope of the pacific southwest sector for displaying the image frame
  const Point pointForImageFrame(-120.0724273439448, 35.131016955536694, SpatialReference(4326));
  m_pacificSouthwestEnvelope = Envelope(pointForImageFrame, 15.09589635986124, -14.3770441522488);

  // create a camera, looking at the pacific southwest sector
  const Point observationPoint(-116.621, 24.7773, 856977);
  const Camera camera(observationPoint, 353.994, 48.5495, 0);
  const Viewpoint pacificSouthwestViewpoint(observationPoint, camera);

  m_scene->setInitialViewpoint(pacificSouthwestViewpoint);

  // create an image overlay
  m_imageOverlay = new ImageOverlay(this);

  // append the image overlay to the scene view
  m_sceneView->imageOverlays()->append(m_imageOverlay);

  // Create new Timer and set the timeout interval to 68ms
  m_timer = new QTimer(this);
  m_timer->setInterval(68);

  // connect to the timeout signal to load and display a new image frame each time
  connect(m_timer, &QTimer::timeout, this, &AnimateImagesWithImageOverlay::animateImageFrames);
}

void AnimateImagesWithImageOverlay::animateImageFrames()
{
  // check if string list of images is empty before trying to load and animate them
  if (m_imagesSize == 0)
    return;

  // create an image with the given path and use it to create an image frame
  const QImage image(m_dataPath + "/" + m_images[m_index]);

  // use std::unqiue_ptr to handle the lifetime of the image frame
  std::unique_ptr<ImageFrame> imageFrame = std::make_unique<ImageFrame>(image, m_pacificSouthwestEnvelope);

  // set image frame to image overlay
  m_imageOverlay->setImageFrame(imageFrame.get());

  // increment the index to keep track of which image to load next
  m_index++;

  // reset index once all files have been loaded
  if (m_index == m_imagesSize)
    m_index = 0;
}

void AnimateImagesWithImageOverlay::setTimerInterval(int value)
{
  if (!m_timer)
    return;

  m_timer->setInterval(value);
}
void AnimateImagesWithImageOverlay::setOpacity(float value)
{
  if (!m_imageOverlay)
    return;

  m_imageOverlay->setOpacity(value);
}

void AnimateImagesWithImageOverlay::startTimer()
{
  if (!m_timer)
    return;

  m_isStopped = false;
  emit isStoppedChanged();
  m_timer->start();
}

void AnimateImagesWithImageOverlay::stopTimer()
{
  if (!m_timer)
    return;

  m_isStopped = true;
  emit isStoppedChanged();
  m_timer->stop();
}