From 639a0f49a03910f5033872fa3b9388b1ec50ec51 Mon Sep 17 00:00:00 2001
From: Joshua Pirihi <josh.pirihi@gmail.com>
Date: Mon, 27 Dec 2021 08:00:47 +1300
Subject: [PATCH] On initial load, move the map to the region that bounds the
 mesh

---
 MeshtasticClient/Views/Map/MapView.swift | 36 ++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/MeshtasticClient/Views/Map/MapView.swift b/MeshtasticClient/Views/Map/MapView.swift
index ebdd6742..39967558 100644
--- a/MeshtasticClient/Views/Map/MapView.swift
+++ b/MeshtasticClient/Views/Map/MapView.swift
@@ -21,6 +21,8 @@ struct MapView: UIViewRepresentable {
 	//observe changes to the key in UserDefaults
 	@AppStorage("meshMapType") var type: String = "hybrid"
 	
+	//@State var needToMoveToMeshRegion: Bool = true
+	
 	func makeUIView(context: Context) -> MKMapView {
 		
 		let map = MKMapView(frame: .zero)
@@ -31,6 +33,8 @@ struct MapView: UIViewRepresentable {
 		map.setRegion(map.regionThatFits(region), animated: false)
 		
 		//self.updateMapType(map)
+		self.showNodePositions(to: map)
+		self.moveToMeshRegion(in: map)
 		
 		map.register(PositionAnnotationView.self, forAnnotationViewWithReuseIdentifier: NSStringFromClass(PositionAnnotationView.self))
 		
@@ -44,6 +48,38 @@ struct MapView: UIViewRepresentable {
 		self.updateMapType(view)
 		
 		self.showNodePositions(to: view)
+		
+		//if (self.needToMoveToMeshRegion) {
+		//	self.moveToMeshRegion(in: view)
+		//	self.needToMoveToMeshRegion = false
+		//}
+	}
+	
+	func moveToMeshRegion(in mapView: MKMapView) {
+		//go through the annotations and create a bounding box that encloses them
+		
+		var minLat: CLLocationDegrees = 90.0
+		var maxLat: CLLocationDegrees = -90.0
+		var minLon: CLLocationDegrees = 180.0
+		var maxLon: CLLocationDegrees = -180.0
+		
+		for annotation in mapView.annotations {
+			if annotation.isKind(of: PositionAnnotation.self) {
+				minLat = min(minLat, annotation.coordinate.latitude)
+				maxLat = max(maxLat, annotation.coordinate.latitude)
+				minLon = min(minLon, annotation.coordinate.longitude)
+				maxLon = max(maxLon, annotation.coordinate.longitude)
+			}
+		}
+		let centerCoord = CLLocationCoordinate2D(latitude: (minLat+maxLat)/2, longitude: (minLon+maxLon)/2)
+		
+		let span = MKCoordinateSpan(latitudeDelta: (maxLat-minLat)*1.5, longitudeDelta: (maxLon-minLon)*1.5)
+		
+		let region = mapView.regionThatFits(MKCoordinateRegion(center: centerCoord, span: span))
+		
+		mapView.setRegion(region, animated: true)
+		
+		
 	}
 	
 	func updateMapType(_ map: MKMapView) {