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mapwidgethelper: support tracking of all selected dive sites

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MapWidgetHelper::centerOnDiveSite() now checks if more than
one dive sites are selected and finds the most top-left and
bottom-right ones in the coordinate system to form
a rectangle.

It also supports the special cases where a selected dive site
does not have coordinates or the case where only a single dive site
with GPS coordinates are selected.

TODO: implement mapwidget.qml::centerOnRectangle()
This QML function will receive a QGeoCoordinate based rectangle which
has to be centered in the viewport with animation.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
This commit is contained in:
Lubomir I. Ivanov 2017-08-07 02:04:23 +03:00 • committed by Dirk Hohndel
parent 6fb841887d
commit d421660f91
2 changed files with 63 additions and 7 deletions
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66
mobile-widgets/qmlmapwidgethelper.cpp
View file

@ -3,6 +3,7 @@
#include <QClipboard>
#include <QGeoCoordinate>
#include <QDebug>
#include <QVector>
#include "qmlmapwidgethelper.h"
#include "core/dive.h"
@ -21,16 +22,67 @@ MapWidgetHelper::MapWidgetHelper(QObject *parent) : QObject(parent)
void MapWidgetHelper::centerOnDiveSite(struct dive_site *ds)
{
if (!dive_site_has_gps_location(ds)) {
int idx;
struct dive *dive;
QVector<struct dive_site *> selDS;
QVector<QGeoCoordinate> selGC;
QGeoCoordinate dsCoord;
for_each_dive (idx, dive) {
struct dive_site *dss = get_dive_site_for_dive(dive);
if (!dive_site_has_gps_location(dss) || !dive->selected)
continue;
// only store dive sites with GPS
selDS.append(dss);
selGC.append(QGeoCoordinate(dss->latitude.udeg * 0.000001,
dss->longitude.udeg * 0.000001));
}
if (!dive_site_has_gps_location(ds) && !selDS.size()) {
// only a single dive site with no GPS selected
m_mapLocationModel->setSelectedUuid(ds ? ds->uuid : 0, false);
QMetaObject::invokeMethod(m_map, "deselectMapLocation");
return;
} else if (selDS.size() == 1) {
// a single dive site with GPS selected
ds = selDS.at(0);
m_mapLocationModel->setSelectedUuid(ds->uuid, false);
dsCoord.setLatitude(ds->latitude.udeg * 0.000001);
dsCoord.setLongitude(ds->longitude.udeg * 0.000001);
QMetaObject::invokeMethod(m_map, "centerOnCoordinate", Q_ARG(QVariant, QVariant::fromValue(dsCoord)));
} else if (selDS.size() > 1) {
/* more than one dive sites with GPS selected.
* find the most top-left and bottom-right dive sites on the map coordinate system. */
ds = selDS.at(0);
m_mapLocationModel->setSelectedUuid(ds->uuid, false);
qreal minLat = 0.0, minLon = 0.0, maxLat = 0.0, maxLon = 0.0;
bool start = true;
foreach(QGeoCoordinate gc, selGC) {
qreal lat = gc.latitude();
qreal lon = gc.longitude();
if (start) {
minLat = maxLat = lat;
minLon = maxLon = lon;
start = false;
continue;
}
if (lat < minLat)
minLat = lat;
else if (lat > maxLat)
maxLat = lat;
if (lon < minLon)
minLon = lon;
else if (lon > maxLon)
maxLon = lon;
}
// pass rectangle coordinates to QML
QGeoCoordinate coordTopLeft(minLat, minLon);
QGeoCoordinate coordBottomRight(maxLat, maxLon);
QGeoCoordinate coordCenter(minLat + (maxLat - minLat) * 0.5, minLon + (maxLon - minLon) * 0.5);
QMetaObject::invokeMethod(m_map, "centerOnRectangle",
Q_ARG(QVariant, QVariant::fromValue(coordTopLeft)),
Q_ARG(QVariant, QVariant::fromValue(coordBottomRight)),
Q_ARG(QVariant, QVariant::fromValue(coordCenter)));
}
m_mapLocationModel->setSelectedUuid(ds->uuid, false);
const qreal latitude = ds->latitude.udeg * 0.000001;
const qreal longitude = ds->longitude.udeg * 0.000001;
QGeoCoordinate dsCoord(latitude, longitude);
QMetaObject::invokeMethod(m_map, "centerOnCoordinate", Q_ARG(QVariant, QVariant::fromValue(dsCoord)));
}
void MapWidgetHelper::reloadMapLocations()