Gps list: include the time_t timestamp in the model

Just having the string means we lost the unique value that we can use as key to
indentify a specific GPS fix.

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

qt-mobile/qml/GpsList.qml

@@ -52,7 +52,7 @@ MobileComponents.Page {
 						font.pointSize: subsurfaceTheme.smallPointSize
 					}
 					MobileComponents.Label {
-						text: when
+						text: date
 						width: Math.max(parent.width / 5, paintedWidth) // helps vertical alignment throughout listview
 						font.pointSize: subsurfaceTheme.smallPointSize
 					}

qt-models/gpslistmodel.cpp

@@ -46,6 +46,8 @@ QVariant GpsListModel::data(const QModelIndex &index, int role) const
 
 	if (role == GpsDateRole)
 		return get_short_dive_date_string(gt.when);
+	else if (role == GpsWhenRole)
+		return gt.when;
 	else if (role == GpsNameRole)
 		return gt.name;
 	else if (role == GpsLatitudeRole)
@@ -58,7 +60,8 @@ QVariant GpsListModel::data(const QModelIndex &index, int role) const
 QHash<int, QByteArray> GpsListModel::roleNames() const
 {
 	QHash<int, QByteArray> roles;
-	roles[GpsDateRole] = "when";
+	roles[GpsDateRole] = "date";
+	roles[GpsWhenRole] = "when";
 	roles[GpsNameRole] = "name";
 	roles[GpsLatitudeRole] = "latitude";
 	roles[GpsLongitudeRole] = "longitude";

qt-models/gpslistmodel.h

@@ -14,7 +14,8 @@ public:
 		GpsDateRole = Qt::UserRole + 1,
 		GpsNameRole,
 		GpsLatitudeRole,
-		GpsLongitudeRole
+		GpsLongitudeRole,
+		GpsWhenRole
 	};
 
 	static GpsListModel *instance();