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MGLMapView.mm
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MGLMapView.mm
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#import "MGLMapView.h"
#import "MGLMapView+IBAdditions.h"
#import <mbgl/platform/log.hpp>
#import <mbgl/platform/gl.hpp>
#import <GLKit/GLKit.h>
#import <OpenGLES/EAGL.h>
#include <mbgl/mbgl.hpp>
#include <mbgl/platform/platform.hpp>
#include <mbgl/platform/darwin/reachability.h>
#include <mbgl/storage/default_file_source.hpp>
#include <mbgl/storage/default/sqlite_cache.hpp>
#include <mbgl/storage/network_status.hpp>
#include <mbgl/util/geo.hpp>
#import "MGLTypes.h"
#import "NSString+MGLAdditions.h"
#import "NSProcessInfo+MGLAdditions.h"
#import "MGLAnnotation.h"
#import "MGLUserLocationAnnotationView.h"
#import "MGLUserLocation_Private.h"
#import "SMCalloutView.h"
#import "MGLMapboxEvents.h"
#import <algorithm>
// Returns the path to the default cache database on this system.
const std::string &defaultCacheDatabase() {
static const std::string path = []() -> std::string {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
if ([paths count] == 0) {
// Disable the cache if we don't have a location to write.
return "";
}
NSString *libraryDirectory = [paths objectAtIndex:0];
return [[libraryDirectory stringByAppendingPathComponent:@"cache.db"] UTF8String];
}();
return path;
}
static dispatch_once_t loadGLExtensions;
NSString *const MGLDefaultStyleName = @"Emerald";
NSString *const MGLStyleVersion = @"7";
NSString *const MGLDefaultStyleMarkerSymbolName = @"default_marker";
NSString *const MGLMapboxAccessTokenManagerURLDisplayString = @"mapbox.com/account/apps";
const NSTimeInterval MGLAnimationDuration = 0.3;
const CGSize MGLAnnotationUpdateViewportOutset = {150, 150};
const CGFloat MGLMinimumZoom = 3;
NSString *const MGLAnnotationIDKey = @"MGLAnnotationIDKey";
static NSURL *MGLURLForBundledStyleNamed(NSString *styleName)
{
return [NSURL URLWithString:[NSString stringWithFormat:@"asset://styles/%@.json", styleName]];
}
#pragma mark - Private -
@interface MGLMapView () <UIGestureRecognizerDelegate, GLKViewDelegate, CLLocationManagerDelegate>
@property (nonatomic) EAGLContext *context;
@property (nonatomic) GLKView *glView;
@property (nonatomic) NSOperationQueue *regionChangeDelegateQueue;
@property (nonatomic) UIImageView *compass;
@property (nonatomic) UIImageView *logoBug;
@property (nonatomic) UIButton *attributionButton;
@property (nonatomic) UIPanGestureRecognizer *pan;
@property (nonatomic) UIPinchGestureRecognizer *pinch;
@property (nonatomic) UIRotationGestureRecognizer *rotate;
@property (nonatomic) UILongPressGestureRecognizer *quickZoom;
@property (nonatomic) NSMutableArray *bundledStyleURLs;
@property (nonatomic) NSMapTable *annotationIDsByAnnotation;
@property (nonatomic) std::vector<uint32_t> annotationsNearbyLastTap;
@property (nonatomic, weak) id <MGLAnnotation> selectedAnnotation;
@property (nonatomic) SMCalloutView *selectedAnnotationCalloutView;
@property (nonatomic) MGLUserLocationAnnotationView *userLocationAnnotationView;
@property (nonatomic) CLLocationManager *locationManager;
@property (nonatomic) CGPoint centerPoint;
@property (nonatomic) CGFloat scale;
@property (nonatomic) CGFloat angle;
@property (nonatomic) CGFloat quickZoomStart;
@property (nonatomic, getter=isAnimatingGesture) BOOL animatingGesture;
@property (nonatomic, readonly, getter=isRotationAllowed) BOOL rotationAllowed;
@end
@implementation MGLMapView
{
BOOL _isTargetingInterfaceBuilder;
CLLocationDegrees _pendingLatitude;
CLLocationDegrees _pendingLongitude;
}
#pragma mark - Setup & Teardown -
@dynamic debugActive;
class MBGLView;
std::chrono::steady_clock::duration secondsAsDuration(float duration)
{
return std::chrono::duration_cast<std::chrono::steady_clock::duration>(std::chrono::duration<float, std::chrono::seconds::period>(duration));
}
mbgl::Map *mbglMap = nullptr;
MBGLView *mbglView = nullptr;
mbgl::SQLiteCache *mbglFileCache = nullptr;
mbgl::DefaultFileSource *mbglFileSource = nullptr;
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self && [self commonInit])
{
self.styleURL = nil;
return self;
}
return nil;
}
- (instancetype)initWithFrame:(CGRect)frame accessToken:(NSString *)accessToken
{
return [self initWithFrame:frame accessToken:accessToken styleURL:nil];
}
- (instancetype)initWithFrame:(CGRect)frame accessToken:(NSString *)accessToken styleURL:(NSURL *)styleURL
{
self = [super initWithFrame:frame];
if (self && [self commonInit])
{
self.accessToken = accessToken;
self.styleURL = styleURL;
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)decoder
{
self = [super initWithCoder:decoder];
if (self && [self commonInit])
{
self.styleURL = nil;
return self;
}
return nil;
}
- (NSString *)accessToken
{
return @(mbglMap->getAccessToken().c_str()).mgl_stringOrNilIfEmpty;
}
- (void)setAccessToken:(NSString *)accessToken
{
mbglMap->setAccessToken((std::string)[accessToken UTF8String]);
[MGLMapboxEvents setToken:accessToken.mgl_stringOrNilIfEmpty];
}
+ (NSSet *)keyPathsForValuesAffectingStyleURL
{
return [NSSet setWithObjects:@"mapID", @"accessToken", nil];
}
- (NSURL *)styleURL
{
NSString *styleURLString = @(mbglMap->getStyleURL().c_str()).mgl_stringOrNilIfEmpty;
return styleURLString ? [NSURL URLWithString:styleURLString] : nil;
}
- (void)setStyleURL:(NSURL *)styleURL
{
if (_isTargetingInterfaceBuilder) return;
if ( ! styleURL)
{
styleURL = MGLURLForBundledStyleNamed([NSString stringWithFormat:@"%@-v%@",
MGLDefaultStyleName.lowercaseString,
MGLStyleVersion]);
}
if ( ! [styleURL scheme])
{
// Assume a relative path into the developer’s bundle.
styleURL = [[NSBundle mainBundle] URLForResource:styleURL.path withExtension:nil];
}
mbglMap->setStyleURL([[styleURL absoluteString] UTF8String]);
}
- (BOOL)commonInit
{
_isTargetingInterfaceBuilder = NSProcessInfo.processInfo.mgl_isInterfaceBuilderDesignablesAgent;
// create context
//
_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
if ( ! _context)
{
mbgl::Log::Error(mbgl::Event::Setup, "failed to create OpenGL ES context");
return NO;
}
// setup accessibility
//
self.accessibilityLabel = @"Map";
// metrics: initial setup
NSString *appName = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleName"];
NSString *appVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleShortVersionString"];
if (appName != nil) [MGLMapboxEvents setAppName:appName];
if (appVersion != nil) [MGLMapboxEvents setAppVersion:appVersion];
// create GL view
//
_glView = [[GLKView alloc] initWithFrame:self.bounds context:_context];
_glView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
_glView.enableSetNeedsDisplay = YES;
_glView.drawableStencilFormat = GLKViewDrawableStencilFormat8;
_glView.drawableDepthFormat = GLKViewDrawableDepthFormat16;
if ([UIScreen instancesRespondToSelector:@selector(nativeScale)]) {
_glView.contentScaleFactor = [[UIScreen mainScreen] nativeScale];
}
_glView.delegate = self;
[_glView bindDrawable];
[self insertSubview:_glView atIndex:0];
_glView.contentMode = UIViewContentModeCenter;
[self setBackgroundColor:[UIColor clearColor]];
// load extensions
//
dispatch_once(&loadGLExtensions, ^
{
const std::string extensions = (char *)glGetString(GL_EXTENSIONS);
using namespace mbgl;
if (extensions.find("GL_OES_vertex_array_object") != std::string::npos) {
gl::BindVertexArray = glBindVertexArrayOES;
gl::DeleteVertexArrays = glDeleteVertexArraysOES;
gl::GenVertexArrays = glGenVertexArraysOES;
gl::IsVertexArray = glIsVertexArrayOES;
}
if (extensions.find("GL_OES_packed_depth_stencil") != std::string::npos) {
gl::isPackedDepthStencilSupported = YES;
}
if (extensions.find("GL_OES_depth24") != std::string::npos) {
gl::isDepth24Supported = YES;
}
});
// setup mbgl map
//
mbglView = new MBGLView(self);
mbglFileCache = new mbgl::SQLiteCache(defaultCacheDatabase());
mbglFileSource = new mbgl::DefaultFileSource(mbglFileCache);
mbglMap = new mbgl::Map(*mbglView, *mbglFileSource);
mbglView->resize(self.bounds.size.width, self.bounds.size.height, _glView.contentScaleFactor, _glView.drawableWidth, _glView.drawableHeight);
// Notify map object when network reachability status changes.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(reachabilityChanged:)
name:kReachabilityChangedNotification
object:nil];
Reachability* reachability = [Reachability reachabilityForInternetConnection];
[reachability startNotifier];
// setup annotations
//
_annotationIDsByAnnotation = [NSMapTable mapTableWithKeyOptions:NSMapTableStrongMemory valueOptions:NSMapTableStrongMemory];
std::string defaultSymbolName([MGLDefaultStyleMarkerSymbolName UTF8String]);
mbglMap->setDefaultPointAnnotationSymbol(defaultSymbolName);
// setup logo bug
//
_logoBug = [[UIImageView alloc] initWithImage:[MGLMapView resourceImageNamed:@"mapbox.png"]];
_logoBug.accessibilityLabel = @"Mapbox logo";
_logoBug.frame = CGRectMake(8, self.bounds.size.height - _logoBug.bounds.size.height - 4, _logoBug.bounds.size.width, _logoBug.bounds.size.height);
_logoBug.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_logoBug];
// setup attribution
//
_attributionButton = [UIButton buttonWithType:UIButtonTypeInfoLight];
_attributionButton.accessibilityLabel = @"Attribution info";
[_attributionButton addTarget:self action:@selector(showAttribution:) forControlEvents:UIControlEventTouchUpInside];
_attributionButton.frame = CGRectMake(self.bounds.size.width - _attributionButton.bounds.size.width - 8, self.bounds.size.height - _attributionButton.bounds.size.height - 8, _attributionButton.bounds.size.width, _attributionButton.bounds.size.height);
_attributionButton.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:_attributionButton];
// setup compass
//
_compass = [[UIImageView alloc] initWithImage:[MGLMapView resourceImageNamed:@"Compass.png"]];
_compass.accessibilityLabel = @"Compass";
UIImage *compassImage = [MGLMapView resourceImageNamed:@"Compass.png"];
_compass.frame = CGRectMake(0, 0, compassImage.size.width, compassImage.size.height);
_compass.alpha = 0;
UIView *container = [[UIView alloc] initWithFrame:CGRectMake(self.bounds.size.width - compassImage.size.width - 5, 5, compassImage.size.width, compassImage.size.height)];
[container addSubview:_compass];
container.translatesAutoresizingMaskIntoConstraints = NO;
[container addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleCompassTapGesture:)]];
[self addSubview:container];
self.viewControllerForLayoutGuides = nil;
// setup interaction
//
_pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesture:)];
_pan.delegate = self;
[self addGestureRecognizer:_pan];
_scrollEnabled = YES;
_pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)];
_pinch.delegate = self;
[self addGestureRecognizer:_pinch];
_zoomEnabled = YES;
_rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotateGesture:)];
_rotate.delegate = self;
[self addGestureRecognizer:_rotate];
_rotateEnabled = YES;
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTapGesture:)];
doubleTap.numberOfTapsRequired = 2;
[self addGestureRecognizer:doubleTap];
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTapGesture:)];
[singleTap requireGestureRecognizerToFail:doubleTap];
[self addGestureRecognizer:singleTap];
UITapGestureRecognizer *twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerTapGesture:)];
twoFingerTap.numberOfTouchesRequired = 2;
[twoFingerTap requireGestureRecognizerToFail:_pinch];
[twoFingerTap requireGestureRecognizerToFail:_rotate];
[self addGestureRecognizer:twoFingerTap];
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
{
_quickZoom = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleQuickZoomGesture:)];
_quickZoom.numberOfTapsRequired = 1;
_quickZoom.minimumPressDuration = 0.25;
[self addGestureRecognizer:_quickZoom];
}
// observe app activity
//
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBackground:) name:UIApplicationDidEnterBackgroundNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appWillForeground:) name:UIApplicationWillEnterForegroundNotification object:nil];
// set initial position
//
mbglMap->setLatLngZoom(mbgl::LatLng(0, 0), mbglMap->getMinZoom());
_pendingLatitude = NAN;
_pendingLongitude = NAN;
// setup change delegate queue
//
_regionChangeDelegateQueue = [NSOperationQueue new];
_regionChangeDelegateQueue.maxConcurrentOperationCount = 1;
// start the main loop, but not on the IB canvas
if ( ! _isTargetingInterfaceBuilder)
{
mbglMap->start();
}
// metrics: map load event
const mbgl::LatLng latLng = mbglMap->getLatLng();
const double zoom = mbglMap->getZoom();
[MGLMapboxEvents pushEvent:MGLEventTypeMapLoad withAttributes:@{
MGLEventKeyLatitude: @(latLng.latitude),
MGLEventKeyLongitude: @(latLng.longitude),
MGLEventKeyZoomLevel: @(zoom),
MGLEventKeyPushEnabled: @([MGLMapboxEvents checkPushEnabled])
}];
return YES;
}
-(void)reachabilityChanged:(NSNotification*)notification
{
Reachability *reachability = [notification object];
if ([reachability isReachable]) {
mbgl::NetworkStatus::Reachable();
}
}
- (void)dealloc
{
[_regionChangeDelegateQueue cancelAllOperations];
[[NSNotificationCenter defaultCenter] removeObserver:self];
if (mbglMap)
{
delete mbglMap;
mbglMap = nullptr;
}
if (mbglFileSource)
{
delete mbglFileSource;
mbglFileSource = nullptr;
}
if (mbglView)
{
delete mbglView;
mbglView = nullptr;
}
if ([[EAGLContext currentContext] isEqual:_context])
{
[EAGLContext setCurrentContext:nil];
}
}
- (void)setDelegate:(id<MGLMapViewDelegate>)delegate
{
if (_delegate == delegate) return;
_delegate = delegate;
}
#pragma mark - Layout -
- (void)setFrame:(CGRect)frame
{
[super setFrame:frame];
[self setNeedsLayout];
}
- (void)setBounds:(CGRect)bounds
{
[super setBounds:bounds];
[self setNeedsLayout];
}
+ (BOOL)requiresConstraintBasedLayout
{
return YES;
}
- (void)didMoveToSuperview
{
[self.compass.superview removeConstraints:self.compass.superview.constraints];
[self.logoBug removeConstraints:self.logoBug.constraints];
[self.attributionButton removeConstraints:self.attributionButton.constraints];
[self setNeedsUpdateConstraints];
}
- (void)setViewControllerForLayoutGuides:(UIViewController *)viewController
{
_viewControllerForLayoutGuides = viewController;
[self.compass.superview removeConstraints:self.compass.superview.constraints];
[self.logoBug removeConstraints:self.logoBug.constraints];
[self.attributionButton removeConstraints:self.attributionButton.constraints];
[self setNeedsUpdateConstraints];
}
- (void)updateConstraints
{
// If we have a view controller reference, use its layout guides for our various top & bottom
// views so they don't underlap navigation or tool bars. If we don't have a reference, apply
// constraints against ourself to maintain (albeit less ideal) placement of the subviews.
//
NSString *topGuideFormatString = (self.viewControllerForLayoutGuides ? @"[topLayoutGuide]" : @"|");
NSString *bottomGuideFormatString = (self.viewControllerForLayoutGuides ? @"[bottomLayoutGuide]" : @"|");
id topGuideViewsObject = (self.viewControllerForLayoutGuides ? (id)self.viewControllerForLayoutGuides.topLayoutGuide : (id)@"");
id bottomGuideViewsObject = (self.viewControllerForLayoutGuides ? (id)self.viewControllerForLayoutGuides.bottomLayoutGuide : (id)@"");
UIView *constraintParentView = (self.viewControllerForLayoutGuides.view ? self.viewControllerForLayoutGuides.view : self);
// compass
//
UIView *compassContainer = self.compass.superview;
[constraintParentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:%@-topSpacing-[container]", topGuideFormatString]
options:0
metrics:@{ @"topSpacing" : @(5) }
views:@{ @"topLayoutGuide" : topGuideViewsObject,
@"container" : compassContainer }]];
[constraintParentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[container]-rightSpacing-|"
options:0
metrics:@{ @"rightSpacing" : @(5) }
views:@{ @"container" : compassContainer }]];
[compassContainer addConstraint:[NSLayoutConstraint constraintWithItem:compassContainer
attribute:NSLayoutAttributeWidth
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1
constant:self.compass.image.size.width]];
[compassContainer addConstraint:[NSLayoutConstraint constraintWithItem:compassContainer
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual
toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:1
constant:self.compass.image.size.height]];
// logo bug
//
[constraintParentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:[logoBug]-bottomSpacing-%@", bottomGuideFormatString]
options:0
metrics:@{ @"bottomSpacing" : @(4) }
views:@{ @"logoBug" : self.logoBug,
@"bottomLayoutGuide" : bottomGuideViewsObject }]];
[constraintParentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-leftSpacing-[logoBug]"
options:0
metrics:@{ @"leftSpacing" : @(8) }
views:@{ @"logoBug" : self.logoBug }]];
// attribution button
//
[constraintParentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:[NSString stringWithFormat:@"V:[attributionButton]-bottomSpacing-%@", bottomGuideFormatString]
options:0
metrics:@{ @"bottomSpacing" : @(8) }
views:@{ @"attributionButton" : self.attributionButton,
@"bottomLayoutGuide" : bottomGuideViewsObject }]];
[constraintParentView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:[attributionButton]-rightSpacing-|"
options:0
metrics:@{ @"rightSpacing" : @(8) }
views:@{ @"attributionButton" : self.attributionButton }]];
[super updateConstraints];
}
// This is the delegate of the GLKView object's display call.
- (void)glkView:(GLKView *)view drawInRect:(CGRect)rect
{
mbglView->resize(rect.size.width, rect.size.height, view.contentScaleFactor, view.drawableWidth, view.drawableHeight);
mbglMap->renderSync();
}
// This gets called when the view dimension changes, e.g. because the device is being rotated.
- (void)layoutSubviews
{
[super layoutSubviews];
if ( ! _isTargetingInterfaceBuilder)
{
mbglMap->triggerUpdate();
}
}
#pragma mark - Life Cycle -
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunused-parameter"
- (void)appDidBackground:(NSNotification *)notification
{
[MGLMapboxEvents flush];
mbglMap->stop();
[self.glView deleteDrawable];
}
- (void)appWillForeground:(NSNotification *)notification
{
[self.glView bindDrawable];
mbglMap->start();
}
- (void)tintColorDidChange
{
for (UIView *subview in self.subviews) [self updateTintColorForView:subview];
}
- (void)updateTintColorForView:(UIView *)view
{
if ([view respondsToSelector:@selector(setTintColor:)]) view.tintColor = self.tintColor;
for (UIView *subview in view.subviews) [self updateTintColorForView:subview];
}
#pragma mark - Gestures -
- (void)handleCompassTapGesture:(id)sender
{
[self resetNorthAnimated:YES];
if (self.userTrackingMode == MGLUserTrackingModeFollowWithHeading) self.userTrackingMode = MGLUserTrackingModeFollow;
}
#pragma clang diagnostic pop
- (void)handlePanGesture:(UIPanGestureRecognizer *)pan
{
if ( ! self.isScrollEnabled) return;
mbglMap->cancelTransitions();
if (pan.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGesturePanStart forRecognizer:pan];
mbglMap->setGestureInProgress(true);
self.centerPoint = CGPointMake(0, 0);
self.userTrackingMode = MGLUserTrackingModeNone;
}
else if (pan.state == UIGestureRecognizerStateChanged)
{
CGPoint delta = CGPointMake([pan translationInView:pan.view].x - self.centerPoint.x,
[pan translationInView:pan.view].y - self.centerPoint.y);
mbglMap->moveBy(delta.x, delta.y);
self.centerPoint = CGPointMake(self.centerPoint.x + delta.x, self.centerPoint.y + delta.y);
[self notifyMapChange:@(mbgl::MapChangeRegionDidChangeAnimated)];
}
else if (pan.state == UIGestureRecognizerStateEnded || pan.state == UIGestureRecognizerStateCancelled)
{
CGPoint velocity = [pan velocityInView:pan.view];
CGFloat duration = 0;
if ( ! CGPointEqualToPoint(velocity, CGPointZero))
{
CGFloat ease = 0.25;
velocity.x = velocity.x * ease;
velocity.y = velocity.y * ease;
CGFloat speed = sqrt(velocity.x * velocity.x + velocity.y * velocity.y);
CGFloat deceleration = 2500;
duration = speed / (deceleration * ease);
}
CGPoint offset = CGPointMake(velocity.x * duration / 2, velocity.y * duration / 2);
mbglMap->moveBy(offset.x, offset.y, secondsAsDuration(duration));
mbglMap->setGestureInProgress(false);
if (duration)
{
self.animatingGesture = YES;
__weak MGLMapView *weakSelf = self;
[self animateWithDelay:duration animations:^
{
weakSelf.animatingGesture = NO;
[weakSelf notifyMapChange:@(mbgl::MapChangeRegionDidChangeAnimated)];
}];
}
else
{
[self notifyMapChange:@(mbgl::MapChangeRegionDidChange)];
}
// metrics: pan end
CGPoint pointInView = CGPointMake([pan locationInView:pan.view].x, [pan locationInView:pan.view].y);
CLLocationCoordinate2D panCoordinate = [self convertPoint:pointInView toCoordinateFromView:pan.view];
double zoom = [self zoomLevel];
[MGLMapboxEvents pushEvent:MGLEventTypeMapDragEnd withAttributes:@{
MGLEventKeyLatitude: @(panCoordinate.latitude),
MGLEventKeyLongitude: @(panCoordinate.longitude),
MGLEventKeyZoomLevel: @(zoom)
}];
}
}
- (void)handlePinchGesture:(UIPinchGestureRecognizer *)pinch
{
if ( ! self.isZoomEnabled) return;
if (mbglMap->getZoom() <= mbglMap->getMinZoom() && pinch.scale < 1) return;
mbglMap->cancelTransitions();
if (pinch.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGesturePinchStart forRecognizer:pinch];
mbglMap->setGestureInProgress(true);
self.scale = mbglMap->getScale();
self.userTrackingMode = MGLUserTrackingModeNone;
}
else if (pinch.state == UIGestureRecognizerStateChanged)
{
CGFloat newScale = self.scale * pinch.scale;
if (log2(newScale) < mbglMap->getMinZoom()) return;
double scale = mbglMap->getScale();
mbglMap->scaleBy(newScale / scale, [pinch locationInView:pinch.view].x, [pinch locationInView:pinch.view].y);
}
else if (pinch.state == UIGestureRecognizerStateEnded || pinch.state == UIGestureRecognizerStateCancelled)
{
mbglMap->setGestureInProgress(false);
[self unrotateIfNeededAnimated:YES];
[self notifyMapChange:@(mbgl::MapChangeRegionDidChange)];
}
}
- (void)handleRotateGesture:(UIRotationGestureRecognizer *)rotate
{
if ( ! self.isRotateEnabled) return;
mbglMap->cancelTransitions();
if (rotate.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGestureRotateStart forRecognizer:rotate];
mbglMap->setGestureInProgress(true);
self.angle = [MGLMapView degreesToRadians:mbglMap->getBearing()] * -1;
self.userTrackingMode = MGLUserTrackingModeNone;
}
else if (rotate.state == UIGestureRecognizerStateChanged)
{
CGFloat newDegrees = [MGLMapView radiansToDegrees:(self.angle + rotate.rotation)] * -1;
// constrain to +/-30 degrees when merely rotating like Apple does
//
if ( ! self.isRotationAllowed && std::abs(self.pinch.scale) < 10)
{
newDegrees = fminf(newDegrees, 30);
newDegrees = fmaxf(newDegrees, -30);
}
mbglMap->setBearing(newDegrees,
[rotate locationInView:rotate.view].x,
[rotate locationInView:rotate.view].y);
}
else if (rotate.state == UIGestureRecognizerStateEnded || rotate.state == UIGestureRecognizerStateCancelled)
{
mbglMap->setGestureInProgress(false);
[self unrotateIfNeededAnimated:YES];
[self notifyMapChange:@(mbgl::MapChangeRegionDidChange)];
}
}
- (void)handleSingleTapGesture:(UITapGestureRecognizer *)singleTap
{
if (singleTap.state == UIGestureRecognizerStateEnded)
{
[self trackGestureEvent:MGLEventGestureSingleTap forRecognizer:singleTap];
CGPoint tapPoint = [singleTap locationInView:self];
if (self.userLocationVisible && ! [self.selectedAnnotation isEqual:self.userLocation])
{
CGRect userLocationRect = CGRectMake(tapPoint.x - 15, tapPoint.y - 15, 30, 30);
if (CGRectContainsPoint(userLocationRect, [self convertCoordinate:self.userLocation.coordinate toPointToView:self]))
{
[self selectAnnotation:self.userLocation animated:YES];
return;
}
}
// tolerances based on touch size & typical marker aspect ratio
CGFloat toleranceWidth = 40;
CGFloat toleranceHeight = 60;
// setup a recognition area weighted 2/3 of the way above the point to account for average marker imagery
CGRect tapRect = CGRectMake(tapPoint.x - toleranceWidth / 2, tapPoint.y - 2 * toleranceHeight / 3, toleranceWidth, toleranceHeight);
CGPoint tapRectLowerLeft = CGPointMake(tapRect.origin.x, tapRect.origin.y + tapRect.size.height);
CGPoint tapRectUpperLeft = CGPointMake(tapRect.origin.x, tapRect.origin.y);
CGPoint tapRectUpperRight = CGPointMake(tapRect.origin.x + tapRect.size.width, tapRect.origin.y);
CGPoint tapRectLowerRight = CGPointMake(tapRect.origin.x + tapRect.size.width, tapRect.origin.y + tapRect.size.height);
// figure out what that means in coordinate space
CLLocationCoordinate2D coordinate;
mbgl::LatLngBounds tapBounds;
coordinate = [self convertPoint:tapRectLowerLeft toCoordinateFromView:self];
tapBounds.extend(coordinateToLatLng(coordinate));
coordinate = [self convertPoint:tapRectUpperLeft toCoordinateFromView:self];
tapBounds.extend(coordinateToLatLng(coordinate));
coordinate = [self convertPoint:tapRectUpperRight toCoordinateFromView:self];
tapBounds.extend(coordinateToLatLng(coordinate));
coordinate = [self convertPoint:tapRectLowerRight toCoordinateFromView:self];
tapBounds.extend(coordinateToLatLng(coordinate));
// query for nearby annotations
std::vector<uint32_t> nearbyAnnotations = mbglMap->getAnnotationsInBounds(tapBounds);
int32_t newSelectedAnnotationID = -1;
if (nearbyAnnotations.size())
{
// there is at least one nearby annotation; select one
//
// first, sort for comparison and iteration
std::sort(nearbyAnnotations.begin(), nearbyAnnotations.end());
if (nearbyAnnotations == self.annotationsNearbyLastTap)
{
// the selection candidates haven't changed; cycle through them
if (self.selectedAnnotation &&
[[[self.annotationIDsByAnnotation objectForKey:self.selectedAnnotation]
objectForKey:MGLAnnotationIDKey] unsignedIntValue] == self.annotationsNearbyLastTap.back())
{
// the selected annotation is the last in the set; cycle back to the first
// note: this could be the selected annotation if only one in set
newSelectedAnnotationID = self.annotationsNearbyLastTap.front();
}
else if (self.selectedAnnotation)
{
// otherwise increment the selection through the candidates
uint32_t currentID = [[[self.annotationIDsByAnnotation objectForKey:self.selectedAnnotation] objectForKey:MGLAnnotationIDKey] unsignedIntValue];
auto result = std::find(self.annotationsNearbyLastTap.begin(), self.annotationsNearbyLastTap.end(), currentID);
auto distance = std::distance(self.annotationsNearbyLastTap.begin(), result);
newSelectedAnnotationID = self.annotationsNearbyLastTap[distance + 1];
}
else
{
// no current selection; select the first one
newSelectedAnnotationID = self.annotationsNearbyLastTap.front();
}
}
else
{
// start tracking a new set of nearby annotations
self.annotationsNearbyLastTap = nearbyAnnotations;
// select the first one
newSelectedAnnotationID = self.annotationsNearbyLastTap.front();
}
}
else
{
// there are no nearby annotations; deselect if necessary
newSelectedAnnotationID = -1;
}
if (newSelectedAnnotationID >= 0)
{
// find & select model object for selection
NSEnumerator *enumerator = self.annotationIDsByAnnotation.keyEnumerator;
while (id <MGLAnnotation> annotation = enumerator.nextObject)
{
if ([[[self.annotationIDsByAnnotation objectForKey:annotation] objectForKey:MGLAnnotationIDKey] integerValue] == newSelectedAnnotationID)
{
// only change selection status if not the currently selected annotation
if ( ! [annotation isEqual:self.selectedAnnotation])
{
[self selectAnnotation:annotation animated:YES];
}
// either way, we should stop enumerating
break;
}
}
}
else
{
// deselect any selected annotation
if (self.selectedAnnotation) [self deselectAnnotation:self.selectedAnnotation animated:YES];
}
}
}
- (void)handleDoubleTapGesture:(UITapGestureRecognizer *)doubleTap
{
if ( ! self.isZoomEnabled) return;
mbglMap->cancelTransitions();
if (doubleTap.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGestureDoubleTap forRecognizer:doubleTap];
}
else if (doubleTap.state == UIGestureRecognizerStateEnded)
{
CGPoint doubleTapPoint = [doubleTap locationInView:doubleTap.view];
CGPoint zoomInPoint;
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
CGPoint userPoint = [self convertCoordinate:self.userLocation.coordinate toPointToView:self];
CGRect userLocationRect = CGRectMake(userPoint.x - 40, userPoint.y - 40, 80, 80);
if (CGRectContainsPoint(userLocationRect, doubleTapPoint))
{
zoomInPoint = userPoint;
}
}
else
{
self.userTrackingMode = MGLUserTrackingModeNone;
zoomInPoint = doubleTapPoint;
}
mbglMap->scaleBy(2, zoomInPoint.x, zoomInPoint.y, secondsAsDuration(MGLAnimationDuration));
self.animatingGesture = YES;
__weak MGLMapView *weakSelf = self;
[self animateWithDelay:MGLAnimationDuration animations:^
{
weakSelf.animatingGesture = NO;
[weakSelf unrotateIfNeededAnimated:YES];
[weakSelf notifyMapChange:@(mbgl::MapChangeRegionDidChangeAnimated)];
}];
}
}
- (void)handleTwoFingerTapGesture:(UITapGestureRecognizer *)twoFingerTap
{
if ( ! self.isZoomEnabled) return;
if (mbglMap->getZoom() == mbglMap->getMinZoom()) return;
mbglMap->cancelTransitions();
if (twoFingerTap.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGestureTwoFingerSingleTap forRecognizer:twoFingerTap];
}
else if (twoFingerTap.state == UIGestureRecognizerStateEnded)
{
CGPoint zoomOutPoint;
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
zoomOutPoint = self.center;
}
else
{
self.userTrackingMode = MGLUserTrackingModeNone;
zoomOutPoint = CGPointMake([twoFingerTap locationInView:twoFingerTap.view].x, [twoFingerTap locationInView:twoFingerTap.view].y);
}
mbglMap->scaleBy(0.5, zoomOutPoint.x, zoomOutPoint.y, secondsAsDuration(MGLAnimationDuration));
self.animatingGesture = YES;
__weak MGLMapView *weakSelf = self;
[self animateWithDelay:MGLAnimationDuration animations:^
{
weakSelf.animatingGesture = NO;
[weakSelf unrotateIfNeededAnimated:YES];
[weakSelf notifyMapChange:@(mbgl::MapChangeRegionDidChangeAnimated)];
}];
}
}