public LandingPageViewModel()
{
_progressDialogService = Locator.Current.GetService <IProgressDialogService>();
_btDiscovery = Locator.Current.GetService <IBtDiscovery>();
_btClient = Locator.Current.GetService <IBtClient>();
_btClient.ReceivedData += _btClient_ReceivedData;
Operations = new ObservableCollection <string>();
// Subscribe to the update of paired devices property
this.WhenAnyValue(vm => vm._btDiscovery.PairedDevices)
.Subscribe((pairedDevices) =>
{
PairedDevices = pairedDevices;
});
// Display a progress dialog when the bluetooth discovery takes place
this.WhenAnyValue(vm => vm._btDiscovery.IsBusy)
.DistinctUntilChanged()
.Subscribe((isBusy) =>
{
if (isBusy)
{
_progressDialogService.Show("Please wait...");
}
else
{
_progressDialogService.Hide();
}
});
// The refresh command
Refresh = ReactiveCommand.Create(() =>
{
_btDiscovery.Refresh();
});
// Handle the selection of a device from the list
this.WhenAnyValue(vm => vm.SelectedDevice)
.Subscribe((device) =>
{
if (device == null)
{
return;
}
if (!device.HasRequiredServiceID)
{
Message = "Device not supported or service not running";
return;
}
if (_btClient.Connect(device.Address))
{
// Fetch supported operations from the server
_btClient.SendData("getop");
}
else
{
Message = "Unable to connect to device";
return;
}
});
// Execute an operation
this.Execute = ReactiveCommand.Create <string>((operation) =>
{
_btClient.SendData(operation);
});
Refresh.Execute().Subscribe();
}
public LandingPageViewModel(INavigation navigation, String userJson)
{
Message = "";
this.Navigation = navigation;
userJsonString = userJson;
//logged = JsonConvert.DeserializeObject<User>(userJson);
_progressDialogService = Locator.Current.GetService <IProgressDialogService>();
_btDiscovery = Locator.Current.GetService <IBtDiscovery>();
_btClient = Locator.Current.GetService <IBtClient>();
_btClient.ReceivedData += _btClient_ReceivedData;
isLocationReady = true;
Command audio = new Command(async() => await AudioCheck());
audio.Execute(null);
// Command gps = new Command(async () => await UpdateVelocity());
// gps.Execute(null);
// Operations = new ObservableCollection<string>(); //commented from original code
//GET SPEED ON A TIMER. MOVE THIS CODE FURTHER DOWN LATER ON.
/*
* Device.StartTimer(TimeSpan.FromSeconds(1), () =>
* {
* //get location speed
* Command gps = new Command(async () => await UpdateVelocity());
* gps.Execute(null);
* return true; //repeat cycle
* });*/
Position position = new Position(36.9628066, -122.0194722);
MapSpan mapSpan = new MapSpan(position, 0.01, 0.01);
Map = new Xamarin.Forms.Maps.Map(mapSpan);
//Set webview
/*
* webvw = new Android.Webkit.WebView(Context);
* webvw.SetWebViewClient(new GeoWebViewClient());
* webvw.SetWebChromeClient(new GeoWebChromeClient());
* webvw.Settings.JavaScriptCanOpenWindowsAutomatically = true;
* webvw.Settings.DisplayZoomControls = true;
* webvw.Settings.JavaScriptEnabled = true;
* webvw.Settings.SetGeolocationEnabled(true);
* webvw.LoadUrl("https://www.google.com/maps");*/
// Subscribe to the update of paired devices property
this.WhenAnyValue(vm => vm._btDiscovery.PairedDevices)
.Subscribe((pairedDevices) =>
{
PairedDevices = pairedDevices;
/*
* //traverse list of paired devices looking for the one with the Raspberry Pi UUID
* foreach (BtDeviceInfo dev in PairedDevices)
* {
* String devName = dev.Name;
* bool hasId = dev.HasRequiredServiceID;
* //if (dev != null && dev.HasRequiredServiceID)
* if (dev != null && hasId)
* {
*
* if (_btClient.Connect(dev.Address))
* {
* // Fetch supported operations from the server
* // _btClient.SendData("getop"); //commented this from original code
* // Ping the device to ensure good communcation
* _btClient.SendData("ping");
* return;
* }
* else
* {
* Message = "Unable to connect to device";
* return;
* }
* }
* }*/
});
// Display a progress dialog when the bluetooth discovery takes place
this.WhenAnyValue(vm => vm._btDiscovery.IsBusy)
.DistinctUntilChanged()
.Subscribe((isBusy) =>
{
if (isBusy)
{
_progressDialogService.Show("Please wait...");
}
else
{
//traverse list of paired devices looking for the one with the Raspberry Pi UUID
foreach (BtDeviceInfo dev in PairedDevices)
{
String devName = dev.Name;
bool hasId = dev.HasRequiredServiceID;
//if (dev != null && dev.HasRequiredServiceID)
if (dev != null && hasId)
{
if (_btClient.Connect(dev.Address))
{
// Fetch supported operations from the server
// _btClient.SendData("getop"); //commented this from original code
// Ping the device to ensure good communcation
_btClient.SendData("ping");
_progressDialogService.Hide();
if (Message.Equals("Java.IO.IOException"))
{
Message = "Connection Failed! Please check Raspberry Pi is turned on and try again.";
}
return;
}
else
{
Message = "Unable to connect to device";
_progressDialogService.Hide();
return;
}
}
}
_progressDialogService.Hide();
}
});
// The refresh command
Refresh = ReactiveCommand.Create(() =>
{
_btDiscovery.Refresh();
});
//commented from original code
/*
* // Handle the selection of a device from the list
* this.WhenAnyValue(vm => vm.SelectedDevice)
* .Subscribe((device) =>
* {
* if (device == null)
* {
* return;
* }
*
* if(!device.HasRequiredServiceID)
* {
* Message = "Device not supported or service not running";
* return;
* }
*
* if(_btClient.Connect(device.Address))
* {
* // Fetch supported operations from the server
* // _btClient.SendData("getop"); //commented this from original code
* // Ping the device to ensure good communcation
* _btClient.SendData("ping");
* }
* else
* {
* Message = "Unable to connect to device";
* return;
* }
* });*/
//commented from original code
/*
* // Execute an operation
* this.Execute = ReactiveCommand.Create<string>((operation) =>
* {
* _btClient.SendData(operation);
* });*/
// Execute GoAlert Operation
this.GoRearAlert = ReactiveCommand.Create(() =>
{
Command navigate = new Command(async() => await GotoAlertPage(true, userJsonString));
navigate.Execute(null);
});
this.GoFrontAlert = ReactiveCommand.Create(() =>
{
Command navigate = new Command(async() => await GotoAlertPage(false, userJsonString));
navigate.Execute(null);
});
// Execute Shutdown Operation
this.Shutdown = ReactiveCommand.Create(() =>
{
_btClient.SendData("shutdown");
});
//Execute GoContactListPage Operation
this.SeeContacts = ReactiveCommand.Create(() =>
{
Command navigate = new Command(async() => await GotoContactListPage(userJsonString));
navigate.Execute(null);
});
// Execute SendSpeed Operation
this.SendSpeed = ReactiveCommand.Create <string>((_speed) =>
{
_btClient.SendData("speed:" + _speed); //Use speed heading so that the Raspberry knows it is sending speed
});
Refresh.Execute().Subscribe();
}