MapKitTest

gistfile1.txt

using MonoTouch.UIKit;
using System.Drawing;
using System;
using MonoTouch.Foundation;
using System.IO;
using MonoTouch.MapKit;
using MonoTouch.CoreLocation;

namespace MapKitTest
{
	public class MapView : UIViewController
	{
		MKMapView map;
		
		public MapView () : base ()
		{
			Initialize ();	
		}
		
		public void Initialize()
		{
			map = new MKMapView();
			map.Frame = new RectangleF(0, 0, 320, 460);
			map.MapType = MKMapType.Hybrid;
			map.GetViewForOverlay = GetViewForOverlay;
			//map.RegionChanged += RegionChanged;
			CLLocationCoordinate2D mapCenter = new CLLocationCoordinate2D(61.16806, -149.8725);
			MKCoordinateRegion region = new MKCoordinateRegion(mapCenter, new MKCoordinateSpan(.16, .16));
			map.Region = region;
			
			MKPolygon[,] polyArray = new MKPolygon[10, 50];
			
			for(int x = 0; x < 10; x++)
			{
				for (int y = 0; y < 50; y++)
				{
					CLLocationCoordinate2D[] points = new CLLocationCoordinate2D[4];
					points[0] = new CLLocationCoordinate2D(61.26806 - 0.02*x, -149.9725 + 0.004*y);
					points[1] = new CLLocationCoordinate2D(61.26806 - 0.02*x, -149.9725 + 0.004*(y + 1));
					points[2] = new CLLocationCoordinate2D(61.26806 - 0.02*(x + 1), -149.9725 + 0.004*(y + 1));
					points[3] = new CLLocationCoordinate2D(61.26806 - 0.02*(x + 1), -149.9725 + 0.004*y);
					
					polyArray[x, y] = MKPolygon.FromCoordinates(points);
				}
			}

			View.AddSubview(map);
			foreach(MKPolygon poly in polyArray)
				map.AddOverlay(poly);
		}
		
		public override void ViewDidLoad ()
		{
			UIView view = new UIView(new System.Drawing.RectangleF(0, 20, 320, 420));
			view.BackgroundColor = UIColor.White;
			View = view;
		}
		
		public MKOverlayView GetViewForOverlay (MKMapView mapView, NSObject overlay)
		{
			//if (mapView.Region.Span.LatitudeDelta > .02 || mapView.Region.Span.LongitudeDelta > .028)
			//	return null;
				
			if (overlay.GetType() == typeof(MKPolygon))
			{
				MKPolygonView aView = new MKPolygonView((MKPolygon)overlay);
				aView.StrokeColor = UIColor.Gray;
				aView.LineWidth = 2;
				
	    		return aView;
			}
			return null;
		}
		
		public void RegionChanged(object sender, MKMapViewChangeEventArgs e)
		{
			double latDelta = map.Region.Span.LatitudeDelta;
			double lonDelta = map.Region.Span.LongitudeDelta;
			double centerLat = map.Region.Center.Latitude;
			double centerLon = map.Region.Center.Longitude;
			
			UIAlertView alert = new UIAlertView("Span", 
				String.Format ("Latitude Delta: {0}\nLongitudeDelta: {1}", latDelta, lonDelta),
				null,
				"Okay",
				null);
			alert.Show();
		}
	}
}