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GPS provider: track tristate information for GPS source

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Initially we don't know if we have a source. After that we may think
that we have one, or not have one (but that can actually change while
the program is running if the user, for example, turns the source off
or switches to airplane mode).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2016-04-17 22:41:30 -07:00
parent 5e42909964
commit b00306f50e
2 changed files with 20 additions and 10 deletions
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26
core/gpslocation.cpp
View file

@ -21,21 +21,20 @@
GpsLocation *GpsLocation::m_Instance = NULL;
GpsLocation::GpsLocation(void (*showMsgCB)(const char *), QObject *parent) : QObject(parent)
GpsLocation::GpsLocation(void (*showMsgCB)(const char *), QObject *parent) :
QObject(parent),
m_GpsSource(0),
waitingForPosition(false),
haveSource(UNKNOWN)
{
Q_ASSERT_X(m_Instance == NULL, "GpsLocation", "GpsLocation recreated");
m_Instance = this;
m_GpsSource = 0;
waitingForPosition = false;
showMessageCB = showMsgCB;
// create a QSettings object that's separate from the main application settings
geoSettings = new QSettings(QSettings::NativeFormat, QSettings::UserScope,
QString("org.subsurfacedivelog"), QString("subsurfacelocation"), this);
#ifdef SUBSURFACE_MOBILE
if (hasLocationsSource())
status(QString("Found GPS with positioning methods %1").arg(QString::number(m_GpsSource->supportedPositioningMethods(), 16)));
#endif
userAgent = getUserAgent();
(void)getGpsSource();
loadFromStorage();
}
@ -53,9 +52,14 @@ GpsLocation::~GpsLocation()
QGeoPositionInfoSource *GpsLocation::getGpsSource()
{
if (haveSource == NOGPS)
return 0;
if (!m_GpsSource) {
m_GpsSource = QGeoPositionInfoSource::createDefaultSource(this);
if (m_GpsSource != 0) {
haveSource = (m_GpsSource->supportedPositioningMethods() & QGeoPositionInfoSource::SatellitePositioningMethods) ? HAVEGPS : NOGPS;
emit haveSourceChanged();
#ifndef SUBSURFACE_MOBILE
if (verbose)
#endif
@ -67,6 +71,8 @@ QGeoPositionInfoSource *GpsLocation::getGpsSource()
#ifdef SUBSURFACE_MOBILE
status("don't have GPS source");
#endif
haveSource = NOGPS;
emit haveSourceChanged();
}
}
return m_GpsSource;
@ -74,14 +80,14 @@ QGeoPositionInfoSource *GpsLocation::getGpsSource()
bool GpsLocation::hasLocationsSource()
{
QGeoPositionInfoSource *gpsSource = getGpsSource();
return gpsSource != 0 && (gpsSource->supportedPositioningMethods() & QGeoPositionInfoSource::SatellitePositioningMethods);
(void)getGpsSource();
return haveSource == HAVEGPS;
}
void GpsLocation::serviceEnable(bool toggle)
{
QGeoPositionInfoSource *gpsSource = getGpsSource();
if (!gpsSource) {
if (haveSource != HAVEGPS) {
if (toggle)
status("Can't start location service, no location source available");
return;

4
core/gpslocation.h
View file

@ -52,6 +52,10 @@ private:
void replaceFixToStorage(gpsTracker &gt);
void deleteFixFromStorage(gpsTracker &gt);
void deleteFixesFromServer();
enum { UNKNOWN, NOGPS, HAVEGPS } haveSource;
signals:
void haveSourceChanged();
public slots:
void serviceEnable(bool toggle);