public MyPage()
{
var vm = new ViewModel();
this.BindingContext = vm;
var center = GeoHelper.GetCentralPosition(vm.Monkeys.Select(m => m.Location));
var radius = GeoHelper.GetRadius(center, vm.Monkeys.Select(m => m.Location), true);
var map = new ExtendedMap(
MapSpan.FromCenterAndRadius(
center,
Distance.FromMeters(radius)
)
);
// map.BindingContext = this.BindingContext;
map.SetBinding <ViewModel> (ExtendedMap.ItemsSourceProperty, m => m.Monkeys);
map.SetBinding <ViewModel> (ExtendedMap.SelectedPinProperty, m => m.Selected, BindingMode.TwoWay);
map.SetBinding <ViewModel> (ExtendedMap.VisibleRegionProperty, m => m.Span, BindingMode.TwoWay);
map.SetBinding <ViewModel> (ExtendedMap.ShowDetailCommandProperty, m => m.PinSelectedCommand);
var relativeLayout = new RelativeLayout();
relativeLayout.Children.Add(
map,
widthConstraint: Constraint.RelativeToParent((parent) => { return(parent.Width); }),
heightConstraint: Constraint.RelativeToParent((parent) => { return(parent.Height * 0.5); }));
var listView = new ListView();
listView.RowHeight = 50;
listView.ItemTemplate = new DataTemplate(typeof(TextCell));
listView.ItemTemplate.SetBinding(TextCell.TextProperty, "Name");
listView.SetBinding <ViewModel> (ListView.ItemsSourceProperty, m => m.Monkeys);
listView.ItemSelected += async(sender, e) => {
vm.Selected = e.SelectedItem as CustomPin;
};
vm.PinSelected += (sender, e) => {
this.Navigation.PushAsync(new DetailPage(e));
};
relativeLayout.Children.Add(
listView,
yConstraint: Constraint.RelativeToView(map, (parent, view) => { return(view.Height + 50); }),
heightConstraint: Constraint.RelativeToView(map, (parent, view) => { return(parent.Height - view.Height - 50); }));
this.Content = relativeLayout;
}
private void UpdatePins()
{
var androidMapView = (MapView)Control;
var formsMap = (ExtendedMap)Element;
androidMapView.Map.Clear();
androidMapView.Map.MyLocationEnabled = formsMap.IsShowingUser;
if (formsMap.ItemsSource != null)
{
if (this.markers == null)
{
this.markers = new List <Marker> ();
}
var items = formsMap.ItemsSource.Cast <IMapModel> ();
foreach (var item in items)
{
var markerWithIcon = new MarkerOptions();
markerWithIcon.SetPosition(new LatLng(item.Location.Latitude, item.Location.Longitude));
markerWithIcon.SetTitle(string.IsNullOrWhiteSpace(item.Name) ? "-" : item.Name);
markerWithIcon.SetSnippet(item.Details);
markerWithIcon.InvokeIcon(BitmapDescriptorFactory.DefaultMarker());
var addedMarker = androidMapView.Map.AddMarker(markerWithIcon);
this.markers.Add(addedMarker);
}
var central = GeoHelper.GetCentralPosition(items.Select(i => i.Location));
var radius = GeoHelper.GetRadius(central, items.Select(i => i.Location), true);
this.MoveToRegion(
MapSpan.FromCenterAndRadius(
central,
Distance.FromMeters(radius)
),
false
);
}
}
public ViewModel()
{
this.Monkeys = new ObservableCollection <CustomPin>();
this.Monkeys.Add(new CustomPin {
Name = "Baboon",
Location = new Position(34.027897, 118.301869),
Details = "Baboons are African and Arabian Old World monkeys belonging to the genus Papio, part of the subfamily Cercopithecinae.",
});
this.Monkeys.Add(new CustomPin {
Name = "Capuchin Monkey",
Location = new Position(34.047797, -118.321869),
Details = "The capuchin monkeys are New World monkeys of the subfamily Cebinae. Prior to 2011, the subfamily contained only a single genus, Cebus.",
});
this.Monkeys.Add(new CustomPin {
Name = "Blue Monkey",
Location = new Position(34.007897, -118.300069),
Details = "The blue monkey or diademed monkey is a species of Old World monkey native to Central and East Africa, ranging from the upper Congo River basin east to the East African Rift and south to northern Angola and Zambia",
});
this.Monkeys.Add(new CustomPin {
Name = "Squirrel Monkey",
Location = new Position(34.107897, -118.292869),
Details = "The squirrel monkeys are the New World monkeys of the genus Saimiri. They are the only genus in the subfamily Saimirinae. The name of the genus Saimiri is of Tupi origin, and was also used as an English name by early researchers.",
});
var center = GeoHelper.GetCentralPosition(this.Monkeys.Select(m => m.Location));
var radiusInMeters = GeoHelper.GetRadius(center, this.Monkeys.Select(m => m.Location), true);
this.Span = MapSpan.FromCenterAndRadius(center, Distance.FromMeters(radiusInMeters));
this.PinSelectedCommand = new Command <CustomPin>((pin) => { this.PinSelected(this, pin); });
}