Create GpsListModel in order to be able to display GPS fixes

This will allow us to visualize the GPS fixes that are currently stored in the
QML UI.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

CMakeLists.txt

@@ -226,6 +226,7 @@ if(${SUBSURFACE_TARGET_EXECUTABLE} MATCHES "MobileExecutable")
 		qt-mobile/qmlmanager.cpp
 		qt-mobile/qmlprofile.cpp
 		qt-models/divelistmodel.cpp
+		qt-models/gpslistmodel.cpp
 		subsurface-mobile-main.cpp
 		subsurface-mobile-helper.cpp
 	)

qt-models/gpslistmodel.cpp

@@ -0,0 +1,96 @@
+#include "gpslistmodel.h"
+#include "helpers.h"
+
+GpsTracker::GpsTracker()
+{
+	m_latitude = 0;
+	m_longitude = 0;
+	m_when = 0;
+	m_name = QString();
+}
+
+GpsTracker::~GpsTracker()
+{
+}
+
+uint64_t GpsTracker::when() const
+{
+	return m_when;
+}
+
+int32_t GpsTracker::latitude() const
+{
+	return m_latitude;
+}
+
+int32_t GpsTracker::longitude() const
+{
+	return m_longitude;
+}
+
+QString GpsTracker::name() const
+{
+	return m_name;
+}
+
+GpsListModel *GpsListModel::m_instance = NULL;
+
+GpsListModel::GpsListModel(QObject *parent) : QAbstractListModel(parent)
+{
+	m_instance = this;
+}
+
+void GpsListModel::addGpsFix(gpsTracker *g)
+{
+	beginInsertColumns(QModelIndex(), rowCount(), rowCount());
+	m_gpsFixes.append(GpsTracker(g));
+	endInsertRows();
+}
+
+void GpsListModel::clear()
+{
+	if (m_gpsFixes.count()) {
+		beginRemoveRows(QModelIndex(), 0, m_gpsFixes.count() - 1);
+		m_gpsFixes.clear();
+		endRemoveRows();
+	}
+}
+
+int GpsListModel::rowCount(const QModelIndex &parent) const
+{
+	return m_gpsFixes.count();
+}
+
+QVariant GpsListModel::data(const QModelIndex &index, int role) const
+{
+	if (index.row() < 0 || index.row() > m_gpsFixes.count())
+		return QVariant();
+
+	const GpsTracker &gt = m_gpsFixes[index.row()];
+
+	if (role == GpsDateRole)
+		return get_short_dive_date_string(gt.when());
+	else if (role == GpsNameRole)
+		return QString(gt.name());
+	else if (role == GpsLatitudeRole)
+		return QString::number(gt.latitude() / 1000000.0, 'f', 6);
+	else if (role == GpsLongitudeRole)
+		return QString::number(gt.longitude() / 1000000.0, 'f', 6);
+	return QVariant();
+}
+
+QHash<int, QByteArray> GpsListModel::roleNames() const
+{
+	QHash<int, QByteArray> roles;
+	roles[GpsDateRole] = "when";
+	roles[GpsNameRole] = "name";
+	roles[GpsLatitudeRole] = "latitude";
+	roles[GpsLongitudeRole] = "longitude";
+	return roles;
+}
+
+GpsListModel *GpsListModel::instance()
+{
+	return m_instance;
+}
+

qt-models/gpslistmodel.h

@@ -0,0 +1,57 @@
+#ifndef GPSLISTMODEL_H
+#define GPSLISTMODEL_H
+
+#include "gpslocation.h"
+#include <QObject>
+#include <QAbstractListModel>
+
+class GpsTracker
+{
+private:
+	quint64 m_when;
+	qint32 m_latitude;
+	qint32 m_longitude;
+	QString m_name;
+
+public:
+	GpsTracker(struct gpsTracker *gt)
+	{
+		m_when = gt->when;
+		m_latitude = gt->latitude.udeg;
+		m_longitude = gt->longitude.udeg;
+		m_name = gt->name;
+	}
+	GpsTracker();
+	~GpsTracker();
+	uint64_t when() const;
+	int32_t latitude() const;
+	int32_t longitude() const;
+	QString name() const;
+};
+
+class GpsListModel : public QAbstractListModel
+{
+	Q_OBJECT
+public:
+
+	enum GpsListRoles {
+		GpsDateRole = Qt::UserRole + 1,
+		GpsNameRole,
+		GpsLatitudeRole,
+		GpsLongitudeRole
+	};
+
+	static GpsListModel *instance();
+	GpsListModel(QObject *parent = 0);
+	void addGpsFix(struct gpsTracker *g);
+	void clear();
+	int rowCount(const QModelIndex &parent = QModelIndex()) const;
+	QHash<int, QByteArray> roleNames() const;
+	QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+
+private:
+	QList<GpsTracker> m_gpsFixes;
+	static GpsListModel *m_instance;
+};
+
+#endif // GPSLISTMODEL_H

subsurface-core/gpslocation.cpp

@@ -1,4 +1,5 @@
 #include "gpslocation.h"
+#include "gpslistmodel.h"
 #include "pref.h"
 #include "dive.h"
 #include "helpers.h"
@@ -195,12 +196,6 @@ int GpsLocation::getGpsNum() const
 	return geoSettings->value("count", 0).toInt();
 }
 
-struct gpsTracker {
-	degrees_t latitude;
-	degrees_t longitude;
-	time_t when;
-};
-
 static void copy_gps_location(struct gpsTracker *gps, struct dive *d)
 {
 	struct dive_site *ds = get_dive_site_by_uuid(d->dive_site_uuid);

subsurface-core/gpslocation.h

@@ -9,6 +9,13 @@
 #include <QSettings>
 #include <QNetworkReply>
 
+struct gpsTracker {
+	degrees_t latitude;
+	degrees_t longitude;
+	time_t when;
+	QString name;
+};
+
 class GpsLocation : QObject
 {
 	Q_OBJECT