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using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.ComponentModel;
using ElmSharp;
using Tizen.Location;
using Tizen.Maps;
using Xamarin.Forms.Platform.Tizen;
namespace Xamarin.Forms.Maps.Tizen
{
public class MapRenderer : ViewRenderer<Map, MapView>
{
const string MoveMessageName = "MapMoveToRegion";
bool _disposed;
Overlay _marker;
bool _isLocatorStarted = false;
Lazy<Locator> _locator = new Lazy<Locator>(InitializeLocator);
Dictionary<Pin, MapObject> _pins = new Dictionary<Pin, MapObject>();
static Locator InitializeLocator()
{
var locator = new Locator(LocationType.Hybrid)
{
// Set the default interval to 15s same as UWP
Interval = 15
};
return locator;
}
public MapRenderer()
{
}
protected override void OnElementChanged(ElementChangedEventArgs<Map> e)
{
if (Control == null)
{
var mapControl = new MapView(Platform.Tizen.Forms.Context.MainWindow, FormsMaps.MapService);
SetNativeControl(mapControl);
}
if (e.OldElement != null)
{
((ObservableCollection<Pin>)e.OldElement.Pins).CollectionChanged -= OnCollectionChanged;
MessagingCenter.Unsubscribe<Map, MapSpan>(this, MoveMessageName);
}
if (e.NewElement != null)
{
((ObservableCollection<Pin>)e.NewElement.Pins).CollectionChanged += OnCollectionChanged;
if (e.NewElement.Pins.Count > 0)
{
AddPins(e.NewElement.Pins);
}
MessagingCenter.Subscribe<Map, MapSpan>(this, MoveMessageName, OnMoveToRegion, e.NewElement);
UpdateMapType();
UpdateHasScrollEnabled();
UpdateHasZoomEnabled();
UpdateIsShowingUser();
}
base.OnElementChanged(e);
}
protected override void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
_disposed = true;
if (disposing)
{
MessagingCenter.Unsubscribe<Map, MapSpan>(this, "MapMoveToRegion");
if (Element != null)
{
((ObservableCollection<Pin>)Element.Pins).CollectionChanged -= OnCollectionChanged;
}
Control.Unrealize();
}
base.Dispose(disposing);
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (e.PropertyName == Map.MapTypeProperty.PropertyName)
UpdateMapType();
else if (e.PropertyName == Map.IsShowingUserProperty.PropertyName)
UpdateIsShowingUser();
else if (e.PropertyName == Map.HasScrollEnabledProperty.PropertyName)
UpdateHasScrollEnabled();
else if (e.PropertyName == Map.HasZoomEnabledProperty.PropertyName)
UpdateHasZoomEnabled();
}
void OnMoveToRegion(Map map, MapSpan span)
{
var newCenter = new Geocoordinates(span.Center.Latitude, span.Center.Longitude);
Control.Center = newCenter;
}
void OnCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.NewItems != null)
{
AddPins(e.NewItems);
}
if (e.OldItems != null)
{
RemovePins(e.OldItems);
}
if (e.Action == NotifyCollectionChangedAction.Reset)
{
ClearPins();
}
}
void AddPins(IEnumerable pins)
{
foreach (Pin pin in pins)
{
var coordinates = new Geocoordinates(pin.Position.Latitude, pin.Position.Longitude);
var rectangle = new Background(Platform.Tizen.Forms.Context.MainWindow);
// TODO: Need to change BubbleOverlay to default Marker
// TODO: Need to handle Pin.Clicked event
var nativePin = new BubbleOverlay(coordinates, rectangle);
Control.Add(nativePin);
_pins.Add(pin, nativePin);
}
}
void RemovePins(IEnumerable pins)
{
foreach (Pin pin in pins)
{
if (_pins.ContainsKey(pin))
{
Control.Remove(_pins[pin]);
_pins.Remove(pin);
}
}
}
void ClearPins()
{
foreach (var pin in _pins)
{
Control.Remove(pin.Value);
}
_pins.Clear();
}
void UpdateHasZoomEnabled()
{
if (Element.HasZoomEnabled == true)
Control.ZoomChanged += Dummy;
else
Control.ZoomChanged -= Dummy;
}
void UpdateHasScrollEnabled()
{
if (Element.HasScrollEnabled == true)
Control.Scrolled += Dummy;
else
Control.Scrolled -= Dummy;
}
void Dummy(object sender, MapGestureEventArgs e)
{
//TODO: The implementation of Tizen.Maps needs to be changed to remove this method
}
void ApplyIsShowingUser(Geocoordinates coordinates)
{
if (_marker == null)
{
var rectangle = new Background(Platform.Tizen.Forms.Context.MainWindow);
// TODO: Need to change BubbleOverlay to Default Overlay
_marker = new BubbleOverlay(coordinates, rectangle);
_marker.IsVisible = false;
Control.Add(_marker);
}
_marker.Coordinates = coordinates;
if (!_marker.IsVisible)
{
_marker.IsVisible = true;
Control.Center = coordinates;
Control.ZoomLevel = 13;
}
}
void UpdateIsShowingUser()
{
if (Element.IsShowingUser)
{
_locator.Value.LocationChanged += OnLocationChanged;
if (!_isLocatorStarted)
{
_locator.Value.Start();
_isLocatorStarted = true;
}
}
else
{
if (_locator.IsValueCreated)
{
_locator.Value.LocationChanged -= OnLocationChanged;
_locator.Value.Stop();
_isLocatorStarted = false;
}
if (_marker != null)
_marker.IsVisible = false;
}
}
void OnLocationChanged(object sender, LocationChangedEventArgs e)
{
ApplyIsShowingUser(new Geocoordinates(e.Location.Latitude, e.Location.Longitude));
}
void UpdateMapType()
{
switch (Element.MapType)
{
case MapType.Street:
Control.MapType = MapTypes.Normal;
break;
case MapType.Satellite:
Control.MapType = MapTypes.Satellite;
break;
case MapType.Hybrid:
Control.MapType = MapTypes.Hybrid;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
}
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