diff options
author | Jason Wray <jason@mapbox.com> | 2017-02-11 02:11:17 -0500 |
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committer | Jason Wray <friedbunny@users.noreply.github.com> | 2017-02-13 18:35:04 -0500 |
commit | 3ec93d3bbecb77863212a096ea3ca962197ab5fa (patch) | |
tree | ad096259f244dfb0cfd3023241de27fb20d62e5a /platform/ios/src/MGLMapView.mm | |
parent | 4c311a0091caea8246b36fb63cee4dbec3a62234 (diff) | |
download | qtlocation-mapboxgl-3ec93d3bbecb77863212a096ea3ca962197ab5fa.tar.gz |
[ios] Round tap-zoom gestures to nearest integer
Round double-tap and two-finger tap zoom gestures to the nearest integer zoom level. This has the benefits for raster tiles, as well as styles with zoom-based functions.
This results in a wider possible zoom range — ~0.5-1.5:
Old: z4.6 → z5.6 (+1.0), z4.4 → z5.4 (+1.0)
New: z4.6 → z6.0 (+1.4), z4.4 → z5.0 (+0.6)
Diffstat (limited to 'platform/ios/src/MGLMapView.mm')
-rw-r--r-- | platform/ios/src/MGLMapView.mm | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm index 77fd810e16..0b0bf4a34b 100644 --- a/platform/ios/src/MGLMapView.mm +++ b/platform/ios/src/MGLMapView.mm @@ -1556,10 +1556,12 @@ public: if (doubleTap.state == UIGestureRecognizerStateEnded) { MGLMapCamera *oldCamera = self.camera; - + + double newZoom = round(self.zoomLevel) + 1.0; + CGPoint gesturePoint = [self anchorPointForGesture:doubleTap]; - - MGLMapCamera *toCamera = [self cameraByZoomingToZoomLevel:self.zoomLevel + 1.0 aroundAnchorPoint:gesturePoint]; + + MGLMapCamera *toCamera = [self cameraByZoomingToZoomLevel:newZoom aroundAnchorPoint:gesturePoint]; if (![self.delegate respondsToSelector:@selector(mapView:shouldChangeFromCamera:toCamera:)] || [self.delegate mapView:self shouldChangeFromCamera:oldCamera toCamera:toCamera]) @@ -1567,7 +1569,7 @@ public: [self trackGestureEvent:MGLEventGestureDoubleTap forRecognizer:doubleTap]; mbgl::ScreenCoordinate center(gesturePoint.x, gesturePoint.y); - _mbglMap->scaleBy(2, center, MGLDurationInSecondsFromTimeInterval(MGLAnimationDuration)); + _mbglMap->setZoom(newZoom, center, MGLDurationInSecondsFromTimeInterval(MGLAnimationDuration)); __weak MGLMapView *weakSelf = self; @@ -1595,16 +1597,17 @@ public: { MGLMapCamera *oldCamera = self.camera; - double zoom = self.zoomLevel; + double newZoom = round(self.zoomLevel) - 1.0; + CGPoint gesturePoint = [self anchorPointForGesture:twoFingerTap]; - - MGLMapCamera *toCamera = [self cameraByZoomingToZoomLevel:zoom - 1.0 aroundAnchorPoint:gesturePoint]; + + MGLMapCamera *toCamera = [self cameraByZoomingToZoomLevel:newZoom aroundAnchorPoint:gesturePoint]; if (![self.delegate respondsToSelector:@selector(mapView:shouldChangeFromCamera:toCamera:)] || [self.delegate mapView:self shouldChangeFromCamera:oldCamera toCamera:toCamera]) { mbgl::ScreenCoordinate center(gesturePoint.x, gesturePoint.y); - _mbglMap->scaleBy(0.5, center, MGLDurationInSecondsFromTimeInterval(MGLAnimationDuration)); + _mbglMap->setZoom(newZoom, center, MGLDurationInSecondsFromTimeInterval(MGLAnimationDuration)); __weak MGLMapView *weakSelf = self; |