diff options
Diffstat (limited to 'platform/ios/src/MGLMapView.mm')
| -rw-r--r-- | platform/ios/src/MGLMapView.mm | 93 |
1 files changed, 61 insertions, 32 deletions
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm index d242feb38d..3fc692f4e0 100644 --- a/platform/ios/src/MGLMapView.mm +++ b/platform/ios/src/MGLMapView.mm @@ -157,6 +157,9 @@ static const NSUInteger MGLPresentsWithTransactionAnnotationCount = 0; /// An indication that the requested annotation was not found or is nonexistent. enum { MGLAnnotationTagNotFound = UINT32_MAX }; +/// The threshold used to consider when a tilt gesture should start. +const CLLocationDegrees MGLHorizontalTiltToleranceDegrees = 45.0; + /// Mapping from an annotation tag to metadata about that annotation, including /// the annotation itself. typedef std::unordered_map<MGLAnnotationTag, MGLAnnotationContext> MGLAnnotationTagContextMap; @@ -267,6 +270,9 @@ public: @property (nonatomic) MGLMapDebugMaskOptions residualDebugMask; @property (nonatomic, copy) NSURL *residualStyleURL; +/// Tilt gesture recognizer helper +@property (nonatomic, assign) CGPoint dragGestureMiddlePoint; + - (mbgl::Map &)mbglMap; @end @@ -2139,6 +2145,14 @@ public: if (twoFingerDrag.state == UIGestureRecognizerStateBegan) { + CGPoint midPoint = [twoFingerDrag translationInView:twoFingerDrag.view]; + // In the following if and for the first execution middlePoint + // will be equal to dragGestureMiddlePoint and the resulting + // gestureSlopeAngle will be 0º causing a small delay, + // initializing dragGestureMiddlePoint with the current midPoint + // but substracting one point from 'y' forces an initial 90º angle + // making the gesture avoid the delay + self.dragGestureMiddlePoint = CGPointMake(midPoint.x, midPoint.y-1); initialPitch = *self.mbglMap.getCameraOptions().pitch; [self notifyGestureDidBegin]; } @@ -2150,30 +2164,45 @@ public: twoFingerDrag.state = UIGestureRecognizerStateEnded; return; } - - CGFloat gestureDistance = CGPoint([twoFingerDrag translationInView:twoFingerDrag.view]).y; - CGFloat slowdown = 2.0; - - CGFloat pitchNew = initialPitch - (gestureDistance / slowdown); - - CGPoint centerPoint = [self anchorPointForGesture:twoFingerDrag]; - - MGLMapCamera *oldCamera = self.camera; - MGLMapCamera *toCamera = [self cameraByTiltingToPitch:pitchNew]; - - if ([self _shouldChangeFromCamera:oldCamera toCamera:toCamera]) - { - self.mbglMap.jumpTo(mbgl::CameraOptions() + + CGPoint leftTouchPoint = [twoFingerDrag locationOfTouch:0 inView:twoFingerDrag.view]; + CGPoint rightTouchPoint = [twoFingerDrag locationOfTouch:1 inView:twoFingerDrag.view]; + CLLocationDegrees fingerSlopeAngle = [self angleBetweenPoints:leftTouchPoint endPoint:rightTouchPoint]; + + CGPoint middlePoint = [twoFingerDrag translationInView:twoFingerDrag.view]; + + CLLocationDegrees gestureSlopeAngle = [self angleBetweenPoints:self.dragGestureMiddlePoint endPoint:middlePoint]; + self.dragGestureMiddlePoint = middlePoint; + if (fabs(fingerSlopeAngle) < MGLHorizontalTiltToleranceDegrees && fabs(gestureSlopeAngle) > 60.0 ) { + + CGFloat gestureDistance = middlePoint.y; + CGFloat slowdown = 2.0; + + CGFloat pitchNew = initialPitch - (gestureDistance / slowdown); + + CGPoint centerPoint = [self anchorPointForGesture:twoFingerDrag]; + + MGLMapCamera *oldCamera = self.camera; + MGLMapCamera *toCamera = [self cameraByTiltingToPitch:pitchNew]; + + if ([self _shouldChangeFromCamera:oldCamera toCamera:toCamera]) + { + self.mbglMap.jumpTo(mbgl::CameraOptions() .withPitch(pitchNew) .withAnchor(mbgl::ScreenCoordinate { centerPoint.x, centerPoint.y })); + } + + [self cameraIsChanging]; + } - [self cameraIsChanging]; + } else if (twoFingerDrag.state == UIGestureRecognizerStateEnded || twoFingerDrag.state == UIGestureRecognizerStateCancelled) { [self notifyGestureDidEndWithDrift:NO]; [self unrotateIfNeededForGesture]; + self.dragGestureMiddlePoint = CGPointZero; } } @@ -2296,23 +2325,17 @@ public: - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer { - if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) + if (gestureRecognizer == _twoFingerDrag) { UIPanGestureRecognizer *panGesture = (UIPanGestureRecognizer *)gestureRecognizer; if (panGesture.minimumNumberOfTouches == 2) { - CGPoint west = [panGesture locationOfTouch:0 inView:panGesture.view]; - CGPoint east = [panGesture locationOfTouch:1 inView:panGesture.view]; - - if (west.x > east.x) { - CGPoint swap = west; - west = east; - east = swap; - } + CGPoint leftTouchPoint = [panGesture locationOfTouch:0 inView:panGesture.view]; + CGPoint rightTouchPoint = [panGesture locationOfTouch:1 inView:panGesture.view]; - CLLocationDegrees horizontalToleranceDegrees = 60.0; - if ([self angleBetweenPoints:west east:east] > horizontalToleranceDegrees) { + CLLocationDegrees degrees = [self angleBetweenPoints:leftTouchPoint endPoint:rightTouchPoint]; + if (fabs(degrees) > MGLHorizontalTiltToleranceDegrees) { return NO; } } @@ -2334,18 +2357,24 @@ public: - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer { NSArray *validSimultaneousGestures = @[ self.pan, self.pinch, self.rotate ]; - return ([validSimultaneousGestures containsObject:gestureRecognizer] && [validSimultaneousGestures containsObject:otherGestureRecognizer]); } -- (CLLocationDegrees)angleBetweenPoints:(CGPoint)west east:(CGPoint)east +- (CLLocationDegrees)angleBetweenPoints:(CGPoint)originPoint endPoint:(CGPoint)endPoint { - CGFloat slope = (west.y - east.y) / (west.x - east.x); + if (originPoint.x > endPoint.x) { + CGPoint swap = originPoint; + originPoint = endPoint; + endPoint = swap; + } + + CGFloat x = (endPoint.x - originPoint.x); + CGFloat y = (endPoint.y - originPoint.y); - CGFloat angle = atan(fabs(slope)); - CLLocationDegrees degrees = MGLDegreesFromRadians(angle); + CGFloat angleInRadians = atan2(y, x); + CLLocationDegrees angleInDegrees = MGLDegreesFromRadians(angleInRadians); - return degrees; + return angleInDegrees; } #pragma mark - Attribution - |