Buffer

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
// [WriteFile Name=Buffer, Category=Geometry]
// [Legal]
// Copyright 2018 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 "Buffer.h"

#include "Map.h"
#include "MapQuickView.h"
#include "Envelope.h"
#include "GeometryEngine.h"
#include "GraphicsOverlay.h"
#include "Graphic.h"
#include "SimpleFillSymbol.h"
#include "SimpleLineSymbol.h"
#include "SimpleMarkerSymbol.h"
#include "SimpleRenderer.h"
#include <cmath>

using namespace Esri::ArcGISRuntime;

Buffer::Buffer(QQuickItem* parent /* = nullptr */):
  QQuickItem(parent)
{
}

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

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

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");

  // Create a map using the topographic basemap
  m_map = new Map(BasemapStyle::ArcGISTopographic, this);

  // add a graphics overlay for the geodesic buffer
  m_graphicsOverlayGeodesic = new GraphicsOverlay(this);
  m_mapView->graphicsOverlays()->append(m_graphicsOverlayGeodesic);

  // add a graphics overlay for the planar buffer
  m_graphicsOverlayPlanar = new GraphicsOverlay(this);
  m_mapView->graphicsOverlays()->append(m_graphicsOverlayPlanar);

  // add a graphics overlay for the mouse click
  m_graphicsOverlayPoints = new GraphicsOverlay(this);
  m_mapView->graphicsOverlays()->append(m_graphicsOverlayPoints);

  // Set map to map view
  m_mapView->setMap(m_map);

  // create symbol for the geodesic buffer result
  SimpleLineSymbol* outlineGeodesic = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor("red"), 2.0f /*width*/, this);
  SimpleFillSymbol* sfsGeodesic = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(255, 0, 0, 122), outlineGeodesic, this);
  m_graphicsOverlayGeodesic->setRenderer(new SimpleRenderer(sfsGeodesic, this));

  // create symbol for the planar buffer result
  SimpleLineSymbol* outlinePlanar = new SimpleLineSymbol(SimpleLineSymbolStyle::Solid, QColor("blue"), 2.0f /*width*/, this);
  SimpleFillSymbol* sfsPlanar = new SimpleFillSymbol(SimpleFillSymbolStyle::Solid, QColor(0, 0, 255, 122), outlinePlanar, this);
  m_graphicsOverlayPlanar->setRenderer(new SimpleRenderer(sfsPlanar, this));

  // create symbol for the mouse click
  SimpleMarkerSymbol* sms = new SimpleMarkerSymbol(SimpleMarkerSymbolStyle::Cross, QColor("white"), 14.0f /*width*/, this);
  m_graphicsOverlayPoints->setRenderer(new SimpleRenderer(sms, this));

  // connect to mouse clicked signal
  connect(m_mapView, &MapQuickView::mouseClicked, this, &Buffer::onMouseClicked);
}

// handle the mouse click - perform a buffer on click
void Buffer::onMouseClicked(QMouseEvent& mouse)
{
  // get the map point from the mouse click
  const Point point = m_mapView->screenToLocation(mouse.x(), mouse.y());

  // Create a variable to be the buffer size in meters. There are 1609.34 meters in one mile.
  const int bufferInMeters = bufferSize() * 1609.34;

  // Create a planar buffer graphic around the input location at the specified distance.
  const Geometry buffer = GeometryEngine::buffer(point, bufferInMeters);

  // Add the result planar buffer as a graphic
  Graphic* resultGraphicPlanar = new Graphic(buffer, this);
  m_graphicsOverlayPlanar->graphics()->append(resultGraphicPlanar);

  // Create a geodesic buffer graphic around the input location at the specified distance.
  const Geometry bufferGeodesic = GeometryEngine::bufferGeodetic(point, bufferInMeters, LinearUnitId::Meters, NAN, GeodeticCurveType::Geodesic);

  // Add the result geodesic buffer as a graphic
  Graphic* resultGraphicGeodesic = new Graphic(bufferGeodesic, this);
  m_graphicsOverlayGeodesic->graphics()->append(resultGraphicGeodesic);

  // Add the clicked point as a graphic
  Graphic* clickedPointGraphic = new Graphic(point, this);
  m_graphicsOverlayPoints->graphics()->append(clickedPointGraphic);
}

int Buffer::bufferSize() const
{
  return m_bufferSize;
}

void Buffer::setBufferSize(int size)
{
  if (size == m_bufferSize)
    return;

  m_bufferSize = size;
}

void Buffer::clear()
{
  m_graphicsOverlayGeodesic->graphics()->clear();
  m_graphicsOverlayPlanar->graphics()->clear();
  m_graphicsOverlayPoints->graphics()->clear();
}