Meshtastic-Apple/Meshtastic/Views/Map/Custom/PositionAnnotationView.swift

//
//  PositionAnnotationView.swift
//  MeshtasticApple
//
//  Created by Joshua Pirihi on 24/12/21.
//

import UIKit
import MapKit
import SwiftUI

// a simple circle annotation, with a string in it
class PositionAnnotation: NSObject, MKAnnotation {

	// This property must be key-value observable, which the `@objc dynamic` attributes provide.
	@objc dynamic var coordinate = CLLocationCoordinate2D(latitude: 0, longitude: 0)

	// Required if you set the annotation view's `canShowCallout` property to `true`
	// this string fills the callout label when you tap an annotation
	var title: String?

	// the text to appear inside the little circle
	var shortName: String?

}

class PositionAnnotationView: MKAnnotationView {

	private let annotationFrame = CGRect(x: 0, y: 0, width: 40, height: 40)
	private let label: UILabel

	override init(annotation: MKAnnotation?, reuseIdentifier: String?) {
		self.label = UILabel(frame: annotationFrame.offsetBy(dx: 0, dy: 0))
		super.init(annotation: annotation, reuseIdentifier: reuseIdentifier)
		self.frame = annotationFrame
		self.label.font = UIFont.preferredFont(forTextStyle: .caption2)
		self.label.textColor = .white
		self.label.textAlignment = .center
		self.backgroundColor = .clear
		self.addSubview(label)
	}

	required init?(coder aDecoder: NSCoder) {
		fatalError("init(coder:) not implemented!")
	}

	public var name: String = "" {
		didSet {
			self.label.text = name
		}
	}

	override func draw(_ rect: CGRect) {
		guard let context = UIGraphicsGetCurrentContext() else { return }

		let circleRect = CGRect(x: 1, y: 1, width: 38, height: 38)
		context.setFillColor(Color.accentColor.cgColor ?? CGColor(red: 0, green: 0.5, blue: 1.0, alpha: 1.0))
		context.fillEllipse(in: circleRect)
	}
}