Closes #77

[iPhone] Enable/Disable GPS switching

iphone/Maps/Classes/MapViewController.mm

@@ -10,9 +10,6 @@
 #include "../../map/drawer_yg.hpp"
 #include "../../map/storage.hpp"
 
-/// Location service will stop only when received lat long will be earlier than this value
-#define MAX_SECONDS_INTERVAL_FOR_RECENT_LOCATION 60.0
-
 typedef FrameWork<model::FeaturesFetcher, Navigator, iphone::WindowHandle> framework_t;
 
 @implementation MapViewController
@@ -22,9 +19,18 @@ typedef FrameWork<model::FeaturesFetcher, Navigator, iphone::WindowHandle> frame
   
 - (void) OnMyPositionClicked: (id)sender
 {
-	[m_locationController Stop];
-	[m_locationController Start];
-	m_isDirtyPosition = true;
+	if (m_locationController.active)
+  {
+  	[m_locationController Stop];
+   	((UIBarItem *)sender).title = @"My Position";
+    m_framework->DisableMyPositionAndHeading();
+  }
+  else
+  {
+		[m_locationController Start];
+		m_isDirtyPosition = true;
+  	((UIBarItem *)sender).title = @"Disable GPS"; 
+  }
 }
 
 - (void) OnSettingsClicked: (id)sender
@@ -74,22 +80,13 @@ typedef FrameWork<model::FeaturesFetcher, Navigator, iphone::WindowHandle> frame
 - (void) OnHeading: (double) heading
 		 withTimestamp: (NSDate *)timestamp
 {
-	NSTimeInterval secondsFromLastUpdate = [timestamp timeIntervalSinceNow];
-	if (fabs(secondsFromLastUpdate)< MAX_SECONDS_INTERVAL_FOR_RECENT_LOCATION)
-		[m_locationController Stop];
 	m_framework->SetHeading(heading);
 }
 
-
 - (void) OnLocation: (m2::PointD const &) mercatorPoint 
-withConfidenceRadius: (double) confidenceRadius
+			withConfidenceRadius: (double) confidenceRadius
 			withTimestamp: (NSDate *) timestamp
 {
-	// stop location update to preserve battery, but only if received location is up to date
-  NSTimeInterval secondsFromLastUpdate = [timestamp timeIntervalSinceNow];
-  if (fabs(secondsFromLastUpdate) < MAX_SECONDS_INTERVAL_FOR_RECENT_LOCATION)
-  	[m_locationController Stop];
-	
   m_framework->SetPosition(mercatorPoint, confidenceRadius);
 	
 	if (m_isDirtyPosition)

iphone/Maps/Classes/UserLocationController.hpp

@@ -21,24 +21,15 @@ withConfidenceRadius: (double) confidenceRadius
   
 @public
 	id delegate;
+  BOOL active;
 }
 
 @property (nonatomic, assign) id delegate;
+/// YES means that location manager is active
+@property (nonatomic, assign) BOOL active;
 
 - (id) initWithDelegate: (id) locationDelegate;
-
 - (void) Start;
-
 - (void) Stop;
 
-- (void) locationManager: (CLLocationManager *) manager
-     didUpdateToLocation: (CLLocation *) newLocation
-            fromLocation: (CLLocation *) oldLocation;
-
-- (void) locationManager: (CLLocationManager *) manager
-				didUpdateHeading: (CLHeading *) newHeading;
-
-- (void) locationManager: (CLLocationManager *) manager
-        didFailWithError: (NSError *) error;
-
 @end

iphone/Maps/Classes/UserLocationController.mm

@@ -5,6 +5,7 @@
 @implementation UserLocationController
 
 @synthesize delegate;
+@synthesize active;
 
 - (id) init
 {
@@ -13,6 +14,7 @@
   {
     m_locationManager = [[CLLocationManager alloc] init];
     m_locationManager.delegate = self;
+    active = NO;
   }
   return self;
 }
@@ -32,8 +34,7 @@
 
 - (void) Start
 {
-
-	
+	active = YES;
   [m_locationManager startUpdatingLocation];
 	if ([m_locationManager headingAvailable])
 	{
@@ -42,13 +43,13 @@
 	}
 	else
 		NSLog(@"heading information is not available");
-
 }
 
 - (void) Stop
 {
 	[m_locationManager stopUpdatingLocation];
 	[m_locationManager stopUpdatingHeading];
+  active = NO;
 }
 
 - (void) locationManager: (CLLocationManager *) manager

map/framework.hpp

@@ -385,6 +385,14 @@ public:
     }
   }
 
+	void DisableMyPositionAndHeading()
+  {
+  	m_isPositionEnabled = false;
+    m_isHeadingEnabled = false;
+    
+    UpdateNow();
+  }
+
   void SetPosition(m2::PointD const & mercatorPos, double confidenceRadius)
   {
     m_isPositionEnabled = true;