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#import "MBXCustomCalloutView.h"
static CGFloat const tipHeight = 10.0;
static CGFloat const tipWidth = 10.0;
@interface MBXCustomCalloutView ()
@property (strong, nonatomic) UILabel *mainLabel;
@end
@implementation MBXCustomCalloutView {
id <MGLAnnotation> _representedObject;
UIView *_leftAccessoryView;
UIView *_rightAccessoryView;
__weak id <MGLCalloutViewDelegate> _delegate;
}
@synthesize representedObject = _representedObject;
@synthesize anchoredToAnnotation = _anchoredToAnnotation;
@synthesize dismissesAutomatically = _dismissesAutomatically;
@synthesize leftAccessoryView = _leftAccessoryView;
@synthesize rightAccessoryView = _rightAccessoryView;
@synthesize delegate = _delegate;
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self)
{
self.backgroundColor = [UIColor clearColor];
_mainLabel = [[UILabel alloc] initWithFrame: CGRectZero];
_mainLabel.backgroundColor = [UIColor clearColor];
[self addSubview: _mainLabel];
}
return self;
}
#pragma mark - API
- (void)presentCalloutFromRect:(CGRect)rect inView:(nonnull UIView *)view constrainedToRect:(__unused CGRect)constrainedRect animated:(BOOL)animated
{
if ([self.delegate respondsToSelector:@selector(calloutViewWillAppear:)])
{
[self.delegate performSelector:@selector(calloutViewWillAppear:) withObject:self];
}
[view addSubview:self];
// prepare title label
if ([self.representedObject respondsToSelector:@selector(title)])
{
self.mainLabel.text = self.representedObject.title;
[self.mainLabel sizeToFit];
}
// prepare our frame
CGFloat frameWidth = self.mainLabel.bounds.size.width;
CGFloat frameHeight = self.mainLabel.bounds.size.height * 2.0;
CGFloat frameOriginX = rect.origin.x + (rect.size.width/2.0) - (frameWidth/2.0);
CGFloat frameOriginY = rect.origin.y - frameHeight;
self.frame = CGRectMake(frameOriginX, frameOriginY,
frameWidth, frameHeight);
if ([self.delegate respondsToSelector:@selector(calloutViewDidAppear:)])
{
[self.delegate performSelector:@selector(calloutViewDidAppear:) withObject:self];
}
}
- (void)setCenter:(CGPoint)center {
center.y = center.y - CGRectGetMidY(self.bounds);
[super setCenter:center];
}
- (void)dismissCalloutAnimated:(BOOL)animated
{
if (self.superview)
[self removeFromSuperview];
}
#pragma mark - internals
- (void)drawRect:(CGRect)rect
{
UIColor *fillColor = [UIColor colorWithWhite:0.7 alpha:1.0];
CGFloat tipLeft = rect.origin.x + (rect.size.width / 2.0) - (tipWidth / 2.0);
CGPoint tipBottom = CGPointMake(rect.origin.x + (rect.size.width / 2.0), rect.origin.y +rect.size.height);
CGFloat heightWithoutTip = rect.size.height - tipHeight;
// draw the white background with tip
CGContextRef ctxt = UIGraphicsGetCurrentContext();
CGMutablePathRef tipPath = CGPathCreateMutable();
CGPathMoveToPoint(tipPath, NULL, 0, 0);
CGPathAddLineToPoint(tipPath, NULL, 0, heightWithoutTip);
CGPathAddLineToPoint(tipPath, NULL, tipLeft, heightWithoutTip);
CGPathAddLineToPoint(tipPath, NULL, tipBottom.x, tipBottom.y);
CGPathAddLineToPoint(tipPath, NULL, tipLeft + tipWidth, heightWithoutTip);
CGPathAddLineToPoint(tipPath, NULL, CGRectGetWidth(rect), heightWithoutTip);
CGPathAddLineToPoint(tipPath, NULL, CGRectGetWidth(rect), 0);
CGPathCloseSubpath(tipPath);
[fillColor setFill];
CGContextAddPath(ctxt, tipPath);
CGContextFillPath(ctxt);
CGPathRelease(tipPath);
}
@end
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