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
|
// SPDX-License-Identifier: GPL-2.0
#include <QApplication>
#include <QClipboard>
#include <QGeoCoordinate>
#include <QDebug>
#include "qmlmapwidgethelper.h"
#include "core/dive.h"
#include "core/divesite.h"
#include "qt-models/maplocationmodel.h"
#define MIN_DISTANCE_BETWEEN_DIVE_SITES_M 50.0
#define SMALL_CIRCLE_RADIUS_PX 26.0
MapWidgetHelper::MapWidgetHelper(QObject *parent) : QObject(parent)
{
m_mapLocationModel = new MapLocationModel(this);
connect(m_mapLocationModel, SIGNAL(selectedLocationChanged(MapLocation *)),
this, SLOT(selectedLocationChanged(MapLocation *)));
}
void MapWidgetHelper::centerOnDiveSite(struct dive_site *ds)
{
if (!dive_site_has_gps_location(ds)) {
QMetaObject::invokeMethod(m_map, "deselectMapLocation");
return;
}
MapLocation *location = m_mapLocationModel->getMapLocationForUuid(ds->uuid);
QMetaObject::invokeMethod(m_map, "centerOnMapLocation", Q_ARG(QVariant, QVariant::fromValue(location)));
}
void MapWidgetHelper::reloadMapLocations()
{
struct dive_site *ds;
int idx;
m_mapLocationModel->clear();
QVector<MapLocation *> locationList;
for_each_dive_site(idx, ds) {
if (!dive_site_has_gps_location(ds))
continue;
const qreal latitude = ds->latitude.udeg * 0.000001;
const qreal longitude = ds->longitude.udeg * 0.000001;
QGeoCoordinate dsCoord(latitude, longitude);
// check if there are no locations too close to the current dive site
bool diveSiteTooClose = false;
foreach(MapLocation *location, locationList) {
QGeoCoordinate coord = qvariant_cast<QGeoCoordinate>(location->getRole(MapLocation::Roles::RoleCoordinate));
if (dsCoord.distanceTo(coord) < MIN_DISTANCE_BETWEEN_DIVE_SITES_M) {
diveSiteTooClose = true;
break;
}
}
if (!diveSiteTooClose)
locationList.append(new MapLocation(ds->uuid, QGeoCoordinate(latitude, longitude)));
}
m_mapLocationModel->addList(locationList);
}
void MapWidgetHelper::selectedLocationChanged(MapLocation *location)
{
int idx;
struct dive *dive;
m_selectedDiveIds.clear();
QGeoCoordinate locationCoord = qvariant_cast<QGeoCoordinate>(location->getRole(MapLocation::Roles::RoleCoordinate));
for_each_dive (idx, dive) {
struct dive_site *ds = get_dive_site_for_dive(dive);
if (!dive_site_has_gps_location(ds))
continue;
const qreal latitude = ds->latitude.udeg * 0.000001;
const qreal longitude = ds->longitude.udeg * 0.000001;
QGeoCoordinate dsCoord(latitude, longitude);
if (locationCoord.distanceTo(dsCoord) < m_smallCircleRadius)
m_selectedDiveIds.append(idx);
}
emit selectedDivesChanged(m_selectedDiveIds);
}
/*
* Based on a 2D Map widget circle with center "coord" and radius SMALL_CIRCLE_RADIUS_PX,
* obtain a "small circle" with radius m_smallCircleRadius in meters:
* https://en.wikipedia.org/wiki/Circle_of_a_sphere
*
* The idea behind this circle is to be able to select multiple nearby dives, when clicking on
* the map. This code can be in QML, but it is in C++ instead for performance reasons.
*
* This can be made faster with an exponential regression [a * exp(b * x)], with a pretty
* decent R-squared, but it becomes bound to map provider zoom level mappings and the
* SMALL_CIRCLE_RADIUS_PX value, which makes the code hard to maintain.
*/
void MapWidgetHelper::calculateSmallCircleRadius(QGeoCoordinate coord)
{
QPointF point;
QMetaObject::invokeMethod(m_map, "fromCoordinate", Q_RETURN_ARG(QPointF, point),
Q_ARG(QGeoCoordinate, coord), Q_ARG(bool, false));
QPointF point2(point.x() + SMALL_CIRCLE_RADIUS_PX, point.y());
QGeoCoordinate coord2;
QMetaObject::invokeMethod(m_map, "toCoordinate", Q_RETURN_ARG(QGeoCoordinate, coord2),
Q_ARG(QPointF, point2), Q_ARG(bool, false));
m_smallCircleRadius = coord2.distanceTo(coord);
}
void MapWidgetHelper::copyToClipboardCoordinates(QGeoCoordinate coord, bool formatTraditional)
{
bool savep = prefs.coordinates_traditional;
prefs.coordinates_traditional = formatTraditional;
const int lat = llrint(1000000.0 * coord.latitude());
const int lon = llrint(1000000.0 * coord.longitude());
const char *coordinates = printGPSCoords(lat, lon);
QApplication::clipboard()->setText(QString(coordinates), QClipboard::Clipboard);
free((void *)coordinates);
prefs.coordinates_traditional = savep;
}
|
