private static double MARGIN_OF_ERROR = 10.0; // in m
public MapPage()
{
// map with default centre at NUS
var NUSCentre = new Xamarin.Forms.Maps.Position(1.2966, 103.7764);
map = new BusMap(MapSpan.FromCenterAndRadius(NUSCentre, Distance.FromKilometers(MEAN_MAP_RADIUS)))
{
IsShowingUser = true,
HeightRequest = 100,
WidthRequest = 960,
VerticalOptions = LayoutOptions.FillAndExpand
};
// add map and slider to stack layout
var stack = new StackLayout {
Spacing = 0
};
stack.Children.Add(map);
Icon = "MapTabIcon.png";
Title = "Map";
Content = stack;
// add random buses for testing
BusSimulator.DispatchBuses();
// init bus and stop pins
UpdatePublicBusPins();
UpdateBusPins();
UpdateStopPins();
}
public MapPage()
{
// map with default centre at NUS
var NUSCenter = new Xamarin.Forms.Maps.Position(1.2966, 103.7764);
map = new BusMap(
MapSpan.FromCenterAndRadius(NUSCenter, Distance.FromKilometers(DEFAULT_RADIUS)))
{
IsShowingUser = true,
HeightRequest = 100,
WidthRequest = 960,
VerticalOptions = LayoutOptions.FillAndExpand
};
// shift to current location if possible (activate only for device testing)
// ShiftToCurrentLocation ();
// add pins for each bus stops
foreach (BusStop busStop in BusHelper.BusStops.Values)
{
var description = "";
foreach (string svc in busStop.services)
{
description += svc + ": " + BusHelper.GetArrivalTiming(busStop.busStopCode, svc) + "\n";
}
var pin = new Pin {
Type = PinType.Place,
Position = new Xamarin.Forms.Maps.Position(busStop.latitude, busStop.longitude),
Label = busStop.name + " - " + busStop.busStopCode,
Address = description
};
var stop = new CustomPin {
Pin = pin,
Id = "stop",
Url = "stop.png"
};
map.Pins.Add(pin);
map.StopPins.Add(stop);
}
// slider to change radius from 0.1 - 0.9 km
var slider = new Slider(1, 9, 5);
slider.ValueChanged += (sender, e) => {
var zoomLevel = e.NewValue; // between 1 and 9
currRadius = 1.0 - (zoomLevel / 10.0);
map.MoveToRegion(MapSpan.FromCenterAndRadius(
map.VisibleRegion.Center, Distance.FromKilometers(currRadius)));
};
// add map and slider to stack layout
var stack = new StackLayout {
Spacing = 0
};
stack.Children.Add(map);
stack.Children.Add(slider);
Icon = "MapTabIcon.png";
Title = "Map";
Content = stack;
// add random buses for testing
BusSimulator.DispatchBuses();
// set timer to update bus and current location
Device.StartTimer(TimeSpan.FromSeconds(REFRESH_INTERVAL), UpdatePositions);
}