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[ios] Maintain user tracking, anchor on user dot during zoom, rotate

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Per MapKit behavior, zooming or rotating with a gesture can no longer kick the user out of user tracking mode. In user tracking mode, the zoom animation is always anchored on the user dot, wherever it may be.
This commit is contained in:
Minh Nguyễn
2016-01-19 11:06:24 -08:00
committed by Minh Nguyễn
parent 65f6eb25b5
commit 5a00427386
2 changed files with 40 additions and 44 deletions
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82
platform/ios/src/MGLMapView.mm
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@@ -849,6 +849,13 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
return UIEdgeInsetsInsetRect(self.bounds, self.contentInset);
}
/// Returns the center point of the inset content within the map view.
- (CGPoint)contentCenter
{
CGRect contentFrame = self.contentFrame;
return CGPointMake(CGRectGetMidX(contentFrame), CGRectGetMidY(contentFrame));
}
#pragma mark - Life Cycle -
- (void)updateFromDisplayLink
@@ -1094,14 +1101,18 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
if (_mbglMap->getZoom() <= _mbglMap->getMinZoom() && pinch.scale < 1) return;
_mbglMap->cancelTransitions();
CGPoint centerPoint = [pinch locationInView:pinch.view];
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
centerPoint = self.userLocationAnnotationViewCenter;
}
if (pinch.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGesturePinchStart forRecognizer:pinch];
self.scale = _mbglMap->getScale();
self.userTrackingMode = MGLUserTrackingModeNone;
[self notifyGestureDidBegin];
}
@@ -1110,10 +1121,8 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
CGFloat newScale = self.scale * pinch.scale;
if (log2(newScale) < _mbglMap->getMinZoom()) return;
mbgl::PrecisionPoint center([pinch locationInView:pinch.view].x,
[pinch locationInView:pinch.view].y);
_mbglMap->setScale(newScale, center);
_mbglMap->setScale(newScale, { centerPoint.x, centerPoint.y });
[self notifyMapChange:mbgl::MapChangeRegionIsChanging];
}
@@ -1149,9 +1158,7 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
if (velocity)
{
CGPoint pinchCenter = [pinch locationInView:pinch.view];
mbgl::PrecisionPoint center(pinchCenter.x, pinchCenter.y);
_mbglMap->setScale(newScale, center, MGLDurationInSeconds(duration));
_mbglMap->setScale(newScale, { centerPoint.x, centerPoint.y }, MGLDurationInSeconds(duration));
}
[self notifyGestureDidEndWithDrift:velocity];
@@ -1165,14 +1172,18 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
if ( ! self.isRotateEnabled) return;
_mbglMap->cancelTransitions();
CGPoint centerPoint = [rotate locationInView:rotate.view];
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
centerPoint = self.userLocationAnnotationViewCenter;
}
if (rotate.state == UIGestureRecognizerStateBegan)
{
[self trackGestureEvent:MGLEventGestureRotateStart forRecognizer:rotate];
self.angle = MGLRadiansFromDegrees(_mbglMap->getBearing()) * -1;
self.userTrackingMode = MGLUserTrackingModeNone;
[self notifyGestureDidBegin];
}
@@ -1187,10 +1198,8 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
newDegrees = fminf(newDegrees, 30);
newDegrees = fmaxf(newDegrees, -30);
}
mbgl::PrecisionPoint center([rotate locationInView:rotate.view].x,
[rotate locationInView:rotate.view].y);
_mbglMap->setBearing(newDegrees, center);
_mbglMap->setBearing(newDegrees, { centerPoint.x, centerPoint.y });
[self notifyMapChange:mbgl::MapChangeRegionIsChanging];
}
@@ -1205,7 +1214,7 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
CGFloat newRadians = radians + velocity * duration * 0.1;
CGFloat newDegrees = MGLDegreesFromRadians(newRadians) * -1;
_mbglMap->setBearing(newDegrees, MGLDurationInSeconds(duration));
_mbglMap->setBearing(newDegrees, { centerPoint.x, centerPoint.y }, MGLDurationInSeconds(duration));
[self notifyGestureDidEndWithDrift:YES];
@@ -1279,24 +1288,13 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
}
else if (doubleTap.state == UIGestureRecognizerStateEnded)
{
CGPoint doubleTapPoint = [doubleTap locationInView:doubleTap.view];
CGPoint zoomInPoint = doubleTapPoint;
CGPoint userPoint = [self convertCoordinate:self.userLocation.coordinate toPointToView:self];
CGPoint gesturePoint = [doubleTap locationInView:doubleTap.view];
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
CGRect userLocationRect = CGRectMake(userPoint.x - 40, userPoint.y - 40, 80, 80);
if (CGRectContainsPoint(userLocationRect, doubleTapPoint))
{
zoomInPoint = userPoint;
}
}
if ( ! CGPointEqualToPoint(zoomInPoint, userPoint))
{
self.userTrackingMode = MGLUserTrackingModeNone;
gesturePoint = self.userLocationAnnotationViewCenter;
}
mbgl::PrecisionPoint center(zoomInPoint.x, zoomInPoint.y);
mbgl::PrecisionPoint center(gesturePoint.x, gesturePoint.y);
_mbglMap->scaleBy(2, center, MGLDurationInSeconds(MGLAnimationDuration));
__weak MGLMapView *weakSelf = self;
@@ -1322,20 +1320,13 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
}
else if (twoFingerTap.state == UIGestureRecognizerStateEnded)
{
CGPoint zoomOutPoint;
CGPoint gesturePoint = [twoFingerTap locationInView:twoFingerTap.view];
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
zoomOutPoint = self.center;
}
else
{
self.userTrackingMode = MGLUserTrackingModeNone;
zoomOutPoint = CGPointMake([twoFingerTap locationInView:twoFingerTap.view].x, [twoFingerTap locationInView:twoFingerTap.view].y);
gesturePoint = self.userLocationAnnotationViewCenter;
}
mbgl::PrecisionPoint center(zoomOutPoint.x, zoomOutPoint.y);
mbgl::PrecisionPoint center(gesturePoint.x, gesturePoint.y);
_mbglMap->scaleBy(0.5, center, MGLDurationInSeconds(MGLAnimationDuration));
__weak MGLMapView *weakSelf = self;
@@ -1370,9 +1361,14 @@ std::chrono::steady_clock::duration MGLDurationInSeconds(float duration)
CGFloat newZoom = log2f(self.scale) + (distance / 75);
if (newZoom < _mbglMap->getMinZoom()) return;
mbgl::PrecisionPoint center(self.bounds.size.width / 2, self.bounds.size.height / 2);
_mbglMap->scaleBy(powf(2, newZoom) / _mbglMap->getScale(), center);
CGPoint centerPoint = self.contentCenter;
if (self.userTrackingMode != MGLUserTrackingModeNone)
{
centerPoint = self.userLocationAnnotationViewCenter;
}
_mbglMap->scaleBy(powf(2, newZoom) / _mbglMap->getScale(),
{ centerPoint.x, centerPoint.y });
[self notifyMapChange:mbgl::MapChangeRegionIsChanging];
}