Location service: toggle the service from the main menu

That way we don't track the user's location until explicitly asked to do
so.

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

qt-mobile/gpslocation.cpp

@@ -22,6 +22,21 @@ GpsLocation::GpsLocation(QObject *parent)
 		status("don't have GPS source");
 	}
 }
+
+void GpsLocation::serviceEnable(bool toggle)
+{
+	if (!gpsSource)
+		return;
+
+	if (toggle) {
+		gpsSource->startUpdates();
+		status("Starting Subsurface GPS service");
+	} else {
+		gpsSource->stopUpdates();
+		status("Stopping Subsurface GPS service");
+	}
+}
+
 void GpsLocation::newPosition(QGeoPositionInfo pos)
 {
 	QString msg("received new position %1");

qt-mobile/gpslocation.h

@@ -20,6 +20,7 @@ private:
 signals:
 
 public slots:
+	void serviceEnable(bool toggle);
 	void newPosition(QGeoPositionInfo pos);
 	void updateTimeout();
 };

qt-mobile/qml/main.qml

@@ -69,6 +69,15 @@ ApplicationWindow {
 			}
 		}
 
+		MenuItem {
+			text: "Run location service"
+			checkable: true
+			checked: manager.locationServiceEnabled
+			onToggled: {
+				manager.setLocationServiceEnabled(checked);
+			}
+		}
+
 		MenuItem {
 			text: "View Log"
 			onTriggered: {

qt-mobile/qmlmanager.cpp

@@ -19,6 +19,7 @@ QMLManager::QMLManager()
 {
 	// create location manager service
 	locationProvider = new GpsLocation(this);
+	setLocationServiceEnabled(false);
 
 	// Initialize cloud credentials.
 	setCloudUserName(prefs.cloud_storage_email);
@@ -174,6 +175,16 @@ void QMLManager::setSaveCloudPassword(bool saveCloudPassword)
 	m_saveCloudPassword = saveCloudPassword;
 }
 
+bool QMLManager::locationServiceEnabled() const
+{
+	return m_locationServiceEnabled;
+}
+
+void QMLManager::setLocationServiceEnabled(bool locationServiceEnabled)
+{
+	m_locationServiceEnabled = locationServiceEnabled;
+	locationProvider->serviceEnable(m_locationServiceEnabled);
+}
 
 QString QMLManager::cloudPassword() const
 {

qt-mobile/qmlmanager.h

@@ -4,6 +4,8 @@
 #include <QObject>
 #include <QString>
 
+#include "qt-mobile/gpslocation.h"
+
 void qmlUiShowMessage(const char *errorString);
 
 class QMLManager : public QObject
@@ -13,6 +15,7 @@ class QMLManager : public QObject
 	Q_PROPERTY(QString cloudPassword READ cloudPassword WRITE setCloudPassword NOTIFY cloudPasswordChanged)
 	Q_PROPERTY(bool saveCloudPassword READ saveCloudPassword WRITE setSaveCloudPassword NOTIFY saveCloudPasswordChanged)
 	Q_PROPERTY(QString logText READ logText WRITE setLogText NOTIFY logTextChanged)
+	Q_PROPERTY(bool locationServiceEnabled READ locationServiceEnabled WRITE setLocationServiceEnabled NOTIFY locationServiceEnabledChanged)
 public:
 	QMLManager();
 	~QMLManager();
@@ -26,6 +29,9 @@ public:
 	bool saveCloudPassword() const;
 	void setSaveCloudPassword(bool saveCloudPassword);
 
+	bool locationServiceEnabled() const;
+	void setLocationServiceEnabled(bool locationServiceEnable);
+
 	QString logText() const;
 	void setLogText(const QString &logText);
 	void appendTextToLog(const QString &newText);
@@ -36,16 +42,20 @@ public slots:
 	void commitChanges(QString diveId, QString suit, QString buddy, QString diveMaster, QString notes);
 	void saveChanges();
 	void addDive();
+
 private:
 	QString m_cloudUserName;
 	QString m_cloudPassword;
 	bool m_saveCloudPassword;
 	QString m_logText;
+	bool m_locationServiceEnabled;
+	GpsLocation *locationProvider;
 
 signals:
 	void cloudUserNameChanged();
 	void cloudPasswordChanged();
 	void saveCloudPasswordChanged();
+	void locationServiceEnabledChanged();
 	void logTextChanged();
 };