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#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
#import "MGLFoundation.h"
#import "MGLMultiPoint.h"
#import "MGLOverlay.h"
#import "MGLTypes.h"
NS_ASSUME_NONNULL_BEGIN
/**
An `MGLPolygon` object represents a closed shape consisting of four or more
vertices, specified as `CLLocationCoordinate2D` instances, and the edges that
connect them. For example, you could use a polygon shape to represent a
building, a lake, or an area you want to highlight.
You can add polygon shapes to the map by adding them to an `MGLShapeSource`
object. Configure the appearance of an `MGLShapeSource`’s or
`MGLVectorTileSource`’s polygons collectively using an `MGLFillStyleLayer` or
`MGLSymbolStyleLayer` object. To access a polygon’s attributes, use an
`MGLPolygonFeature` object.
Alternatively, you can add a polygon overlay directly to a map view using the
`-[MGLMapView addAnnotation:]` or `-[MGLMapView addOverlay:]` method. Configure
a polygon overlay’s appearance using
`-[MGLMapViewDelegate mapView:strokeColorForShapeAnnotation:]` and
`-[MGLMapViewDelegate mapView:fillColorForPolygonAnnotation:]`.
The vertices are automatically connected in the order in which you provide
them. You should close the polygon by specifying the same
`CLLocationCoordinate2D` as the first and last vertices; otherwise, the
polygon’s fill may not cover the area you expect it to. To avoid filling the
space within the shape, give the polygon a transparent fill or use an
`MGLPolyline` object.
A polygon may have one or more interior polygons, or holes, that you specify as
`MGLPolygon` objects with the `+polygonWithCoordinates:count:interiorPolygons:`
method. For example, if a polygon represents a lake, it could exclude an island
within the lake using an interior polygon. Interior polygons may not themselves
have interior polygons. To represent a shape that includes a polygon within a
hole or, more generally, to group multiple polygons together in one shape, use
an `MGLMultiPolygon` or `MGLShapeCollection` object.
To make the polygon straddle the antimeridian, specify some longitudes less
than −180 degrees or greater than 180 degrees.
*/
MGL_EXPORT
@interface MGLPolygon : MGLMultiPoint <MGLOverlay>
/**
The array of polygons nested inside the receiver.
The area occupied by any interior polygons is excluded from the overall shape.
Interior polygons should not overlap. An interior polygon should not have
interior polygons of its own.
If there are no interior polygons, the value of this property is `nil`.
*/
@property (nonatomic, nullable, readonly) NSArray<MGLPolygon *> *interiorPolygons;
/**
Creates and returns an `MGLPolygon` object from the specified set of
coordinates.
@param coords The array of coordinates defining the shape. The data in this
array is copied to the new object.
@param count The number of items in the `coords` array.
@return A new polygon object.
*/
+ (instancetype)polygonWithCoordinates:(const CLLocationCoordinate2D *)coords count:(NSUInteger)count;
/**
Creates and returns an `MGLPolygon` object from the specified set of
coordinates and interior polygons.
@param coords The array of coordinates defining the shape. The data in this
array is copied to the new object.
@param count The number of items in the `coords` array.
@param interiorPolygons An array of `MGLPolygon` objects that define regions
excluded from the overall shape. If this array is `nil` or empty, the shape
is considered to have no interior polygons.
@return A new polygon object.
*/
+ (instancetype)polygonWithCoordinates:(const CLLocationCoordinate2D *)coords count:(NSUInteger)count interiorPolygons:(nullable NSArray<MGLPolygon *> *)interiorPolygons;
@end
/**
An `MGLMultiPolygon` object represents a shape consisting of one or more
polygons that do not overlap. For example, you could use a multipolygon shape
to represent the body of land that consists of an island surrounded by an
atoll: the inner island would be one `MGLPolygon` object, while the surrounding
atoll would be another. You could also use a multipolygon shape to represent a
group of disconnected but related buildings.
You can add multipolygon shapes to the map by adding them to an
`MGLShapeSource` object. Configure the appearance of an `MGLShapeSource`’s or
`MGLVectorTileSource`’s multipolygons collectively using an `MGLFillStyleLayer`
or `MGLSymbolStyleLayer` object.
You cannot add an `MGLMultiPolygon` object directly to a map view using
`-[MGLMapView addAnnotation:]` or `-[MGLMapView addOverlay:]`. However, you can
add the `polygons` array’s items as overlays individually.
*/
MGL_EXPORT
@interface MGLMultiPolygon : MGLShape <MGLOverlay>
/**
An array of polygons forming the multipolygon.
*/
@property (nonatomic, copy, readonly) NSArray<MGLPolygon *> *polygons;
/**
Creates and returns a multipolygon object consisting of the given polygons.
@param polygons The array of polygons defining the shape.
@return A new multipolygon object.
*/
+ (instancetype)multiPolygonWithPolygons:(NSArray<MGLPolygon *> *)polygons;
@end
NS_ASSUME_NONNULL_END
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