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fixes #35: decelerated pinch zooming

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This commit is contained in:
Justin R. Miller
2014-02-07 12:37:48 -05:00
parent c412b8d45a
commit f4edf7a33e
1 changed files with 14 additions and 0 deletions
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14
ios/MBXViewController.mm
View File

@@ -212,6 +212,20 @@ class MBXMapView
mapView->map.scaleBy(powf(2, newZoom) / mapView->map.getScale(), [pinch locationInView:pinch.view].x, [pinch locationInView:pinch.view].y);
}
else if (pinch.state == UIGestureRecognizerStateEnded)
{
if (fabsf(pinch.velocity) < 20)
return;
CGFloat finalZoom = log2f(mapView->map.getScale()) + (0.01 * pinch.velocity);
double scale = mapView->map.getScale();
double new_scale = powf(2, finalZoom);
CGFloat duration = ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad ? 0.5 : 0.5);
mapView->map.scaleBy(new_scale / scale, [pinch locationInView:pinch.view].x, [pinch locationInView:pinch.view].y, duration);
}
[self startRender];
}