public GpsViewModel(IGpsManager manager, IUserDialogs dialogs)
{
this.manager = manager;
this.IsUpdating = this.manager.IsListening;
this.WhenAnyValue(x => x.UseBackground)
.Subscribe(x => this.Access = this.manager.GetCurrentStatus(this.UseBackground).ToString());
this.WhenAnyValue(x => x.IsUpdating)
.Select(x => x ? "Stop Listening" : "Start Updating")
.ToPropertyEx(this, x => x.ListenerText);
this.GetCurrentPosition = ReactiveCommand.CreateFromTask(async _ =>
{
var result = await dialogs.RequestAccess(() => this.manager.RequestAccess(true));
if (!result)
{
return;
}
var reading = await this.manager.GetLastReading();
if (reading == null)
{
await dialogs.Alert("Could not getting GPS coordinates");
}
else
{
this.SetValues(reading);
}
});
this.BindBusyCommand(this.GetCurrentPosition);
this.SelectPriority = ReactiveCommand.Create(() => dialogs.ActionSheet(
new ActionSheetConfig()
.SetTitle("Select Priority/Desired Accuracy")
.Add("Highest", () => this.Priority = GpsPriority.Highest)
.Add("Normal", () => this.Priority = GpsPriority.Normal)
.Add("Low", () => this.Priority = GpsPriority.Low)
.AddCancel()
));
this.ToggleUpdates = ReactiveCommand.CreateFromTask(
async() =>
{
if (this.manager.IsListening)
{
await this.manager.StopListener();
this.gpsListener?.Dispose();
}
else
{
var result = await dialogs.RequestAccess(() => this.manager.RequestAccess(this.UseBackground));
if (!result)
{
await dialogs.Alert("Insufficient permissions");
return;
}
var request = new GpsRequest
{
UseBackground = this.UseBackground,
Priority = this.Priority,
};
if (IsInterval(this.DesiredInterval))
{
request.Interval = ToInterval(this.DesiredInterval);
}
if (IsInterval(this.ThrottledInterval))
{
request.ThrottledInterval = ToInterval(this.ThrottledInterval);
}
await this.manager.StartListener(request);
}
this.IsUpdating = this.manager.IsListening;
},
this.WhenAny(
x => x.IsUpdating,
x => x.DesiredInterval,
x => x.ThrottledInterval,
(u, i, t) =>
{
if (u.GetValue())
{
return(true);
}
var isdesired = IsInterval(i.GetValue());
var isthrottled = IsInterval(t.GetValue());
if (isdesired && isthrottled)
{
var desired = ToInterval(i.GetValue());
var throttle = ToInterval(t.GetValue());
if (throttle.TotalSeconds >= desired.TotalSeconds)
{
return(false);
}
}
return(true);
}
)
);
this.UseRealtime = ReactiveCommand.Create(() =>
{
var rt = GpsRequest.Realtime(false);
this.ThrottledInterval = String.Empty;
this.DesiredInterval = rt.Interval.TotalSeconds.ToString();
this.Priority = rt.Priority;
});
this.RequestAccess = ReactiveCommand.CreateFromTask(async() =>
{
var access = await this.manager.RequestAccess(this.UseBackground);
this.Access = access.ToString();
});
this.BindBusyCommand(this.RequestAccess);
}
public GpsViewModel(IGpsManager manager, IUserDialogs dialogs)
{
this.manager = manager;
this.IsUpdating = this.manager.IsListening;
this.WhenAnyValue(x => x.UseBackground)
.Subscribe(x => this.Access = this.manager.GetCurrentStatus(this.UseBackground).ToString());
this.WhenAnyValue(x => x.IsUpdating)
.Select(x => x ? "Stop Listening" : "Start Updating")
.ToPropertyEx(this, x => x.ListenerText);
this.GetCurrentPosition = ReactiveCommand.CreateFromTask(async _ =>
{
var result = await dialogs.RequestAccess(() => this.manager.RequestAccess(true));
if (!result)
{
return;
}
var reading = await this.manager.GetLastReading();
if (reading == null)
{
dialogs.Alert("Could not getting GPS coordinates");
}
else
{
this.SetValues(reading);
}
});
this.BindBusyCommand(this.GetCurrentPosition);
this.SelectPriority = ReactiveCommand.Create(() => dialogs.ActionSheet(
new ActionSheetConfig()
.SetTitle("Select Priority/Desired Accuracy")
.Add("Highest", () => this.Priority = GpsPriority.Highest)
.Add("Normal", () => this.Priority = GpsPriority.Normal)
.Add("Low", () => this.Priority = GpsPriority.Low)
.SetCancel()
));
this.ToggleUpdates = ReactiveCommand.CreateFromTask(
async() =>
{
if (this.manager.IsListening)
{
await this.manager.StopListener();
this.gpsListener?.Dispose();
}
else
{
var result = await dialogs.RequestAccess(() => this.manager.RequestAccess(this.UseBackground));
if (!result)
{
dialogs.Alert("Insufficient permissions");
return;
}
var request = new GpsRequest
{
UseBackground = this.UseBackground,
Priority = this.Priority
};
var meters = ToDeferred(this.DeferredMeters);
if (meters > 0)
{
request.DeferredDistance = Distance.FromMeters(meters);
}
var secs = ToDeferred(this.DeferredSeconds);
if (secs > 0)
{
request.DeferredTime = TimeSpan.FromSeconds(secs);
}
await this.manager.StartListener(request);
}
this.IsUpdating = this.manager.IsListening;
},
this.WhenAny(
x => x.IsUpdating,
x => x.DeferredMeters,
x => x.DeferredSeconds,
(u, m, s) =>
u.GetValue() ||
(
ToDeferred(m.GetValue()) >= 0 &&
ToDeferred(s.GetValue()) >= 0
)
)
);
this.RequestAccess = ReactiveCommand.CreateFromTask(async() =>
{
var access = await this.manager.RequestAccess(this.UseBackground);
this.Access = access.ToString();
});
this.BindBusyCommand(this.RequestAccess);
}