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#import "MGLUserLocationHeadingArrowLayer.h"
#import "MGLFaux3DUserLocationAnnotationView.h"
#import "MGLGeometry.h"
const CGFloat MGLUserLocationHeadingArrowSize = 8;
@implementation MGLUserLocationHeadingArrowLayer
- (instancetype)initWithUserLocationAnnotationView:(MGLUserLocationAnnotationView *)userLocationView
{
CGFloat size = userLocationView.bounds.size.width + MGLUserLocationHeadingArrowSize;
self = [super init];
self.bounds = CGRectMake(0, 0, size, size);
self.position = CGPointMake(CGRectGetMidX(userLocationView.bounds), CGRectGetMidY(userLocationView.bounds));
self.path = [self arrowPath];
self.fillColor = userLocationView.tintColor.CGColor;
self.shouldRasterize = YES;
self.rasterizationScale = UIScreen.mainScreen.scale;
self.drawsAsynchronously = YES;
self.strokeColor = UIColor.whiteColor.CGColor;
self.lineWidth = 1.0;
self.lineJoin = kCALineJoinRound;
return self;
}
- (void)updateHeadingAccuracy:(CLLocationDirection)accuracy
{
// unimplemented
}
- (void)updateTintColor:(CGColorRef)color
{
self.fillColor = color;
}
- (CGPathRef)arrowPath {
CGFloat center = roundf(CGRectGetMidX(self.bounds));
CGFloat size = MGLUserLocationHeadingArrowSize;
CGPoint top = CGPointMake(center, 0);
CGPoint left = CGPointMake(center - size, size);
CGPoint right = CGPointMake(center + size, size);
CGPoint middle = CGPointMake(center, size / M_PI);
UIBezierPath *bezierPath = [UIBezierPath bezierPath];
[bezierPath moveToPoint:top];
[bezierPath addLineToPoint:left];
[bezierPath addQuadCurveToPoint:right controlPoint:middle];
[bezierPath addLineToPoint:top];
[bezierPath closePath];
return bezierPath.CGPath;
}
@end
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