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50f42cfdef
Based on a current location (MapLocation), iterate the dive list and add nearby dives (distance smaller than m_smallCircleRadius) to a local QList property (m_selectedDiveIds). Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
116 lines
4.3 KiB
C++
116 lines
4.3 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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#include <QApplication>
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#include <QClipboard>
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#include <QGeoCoordinate>
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#include <QDebug>
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#include "qmlmapwidgethelper.h"
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#include "core/dive.h"
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#include "core/divesite.h"
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#include "qt-models/maplocationmodel.h"
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#define MIN_DISTANCE_BETWEEN_DIVE_SITES_M 50.0
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#define SMALL_CIRCLE_RADIUS_PX 26.0
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MapWidgetHelper::MapWidgetHelper(QObject *parent) : QObject(parent)
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{
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m_mapLocationModel = new MapLocationModel(this);
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connect(m_mapLocationModel, SIGNAL(selectedLocationChanged(MapLocation *)),
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this, SLOT(selectedLocationChanged(MapLocation *)));
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}
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void MapWidgetHelper::centerOnDiveSite(struct dive_site *ds)
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{
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if (!dive_site_has_gps_location(ds)) {
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QMetaObject::invokeMethod(m_map, "deselectMapLocation");
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return;
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}
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MapLocation *location = m_mapLocationModel->getMapLocationForUuid(ds->uuid);
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QMetaObject::invokeMethod(m_map, "centerOnMapLocation", Q_ARG(QVariant, QVariant::fromValue(location)));
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}
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void MapWidgetHelper::reloadMapLocations()
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{
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struct dive_site *ds;
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int idx;
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m_mapLocationModel->clear();
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QVector<MapLocation *> locationList;
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for_each_dive_site(idx, ds) {
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if (!dive_site_has_gps_location(ds))
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continue;
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const qreal latitude = ds->latitude.udeg * 0.000001;
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const qreal longitude = ds->longitude.udeg * 0.000001;
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QGeoCoordinate dsCoord(latitude, longitude);
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// check if there are no locations too close to the current dive site
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bool diveSiteTooClose = false;
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foreach(MapLocation *location, locationList) {
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QGeoCoordinate coord = qvariant_cast<QGeoCoordinate>(location->getRole(MapLocation::Roles::RoleCoordinate));
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if (dsCoord.distanceTo(coord) < MIN_DISTANCE_BETWEEN_DIVE_SITES_M) {
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diveSiteTooClose = true;
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break;
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}
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}
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if (!diveSiteTooClose)
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locationList.append(new MapLocation(ds->uuid, QGeoCoordinate(latitude, longitude)));
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}
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m_mapLocationModel->addList(locationList);
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}
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void MapWidgetHelper::selectedLocationChanged(MapLocation *location)
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{
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int idx;
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struct dive *dive;
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m_selectedDiveIds.clear();
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QGeoCoordinate locationCoord = qvariant_cast<QGeoCoordinate>(location->getRole(MapLocation::Roles::RoleCoordinate));
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for_each_dive (idx, dive) {
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struct dive_site *ds = get_dive_site_for_dive(dive);
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if (!dive_site_has_gps_location(ds))
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continue;
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const qreal latitude = ds->latitude.udeg * 0.000001;
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const qreal longitude = ds->longitude.udeg * 0.000001;
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QGeoCoordinate dsCoord(latitude, longitude);
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if (locationCoord.distanceTo(dsCoord) < m_smallCircleRadius)
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m_selectedDiveIds.append(idx);
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}
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qDebug() << "selectedDiveIds:" << m_selectedDiveIds;
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}
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/*
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* Based on a 2D Map widget circle with center "coord" and radius SMALL_CIRCLE_RADIUS_PX,
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* obtain a "small circle" with radius m_smallCircleRadius in meters:
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* https://en.wikipedia.org/wiki/Circle_of_a_sphere
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*
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* The idea behind this circle is to be able to select multiple nearby dives, when clicking on
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* the map. This code can be in QML, but it is in C++ instead for performance reasons.
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*
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* This can be made faster with an exponential regression [a * exp(b * x)], with a pretty
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* decent R-squared, but it becomes bound to map provider zoom level mappings and the
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* SMALL_CIRCLE_RADIUS_PX value, which makes the code hard to maintain.
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*/
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void MapWidgetHelper::calculateSmallCircleRadius(QGeoCoordinate coord)
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{
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QPointF point;
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QMetaObject::invokeMethod(m_map, "fromCoordinate", Q_RETURN_ARG(QPointF, point),
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Q_ARG(QGeoCoordinate, coord), Q_ARG(bool, false));
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QPointF point2(point.x() + SMALL_CIRCLE_RADIUS_PX, point.y());
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QGeoCoordinate coord2;
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QMetaObject::invokeMethod(m_map, "toCoordinate", Q_RETURN_ARG(QGeoCoordinate, coord2),
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Q_ARG(QPointF, point2), Q_ARG(bool, false));
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m_smallCircleRadius = coord2.distanceTo(coord);
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}
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void MapWidgetHelper::copyToClipboardCoordinates(QGeoCoordinate coord, bool formatTraditional)
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{
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bool savep = prefs.coordinates_traditional;
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prefs.coordinates_traditional = formatTraditional;
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const int lat = llrint(1000000.0 * coord.latitude());
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const int lon = llrint(1000000.0 * coord.longitude());
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const char *coordinates = printGPSCoords(lat, lon);
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QApplication::clipboard()->setText(QString(coordinates), QClipboard::Clipboard);
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free((void *)coordinates);
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prefs.coordinates_traditional = savep;
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}
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