private async Task StartScanning()
{
if (App.Current.OWBLE.IsScanning)
{
return;
}
/*
* if (App.Current.OWBLE.BluetoothEnabled() == false)
* {
* await DisplayAlert("Error", "Bluetooth is not enabled on your device. Please enable bluetooth and try scan for boards again.", "Ok");
* return;
* }
*/
if (await DependencyService.Get <DependencyInterfaces.IPermissionPrompt>().PromptBLEPermission() == false)
{
return;
}
try
{
App.Current.OWBLE.StartScanning();
}
catch (Exception)
{
var alert = new Pages.Popup.Alert("Error", "Could not scan for boards. Please ensure bluetooth is enabled and has correct permission to scan.");
await PopupNavigation.Instance.PushAsync(alert, true);
}
}
void OWBLE_ErrorOccurred(string message)
{
Device.InvokeOnMainThreadAsync(async() =>
{
var alert = new Pages.Popup.Alert("Error", message);
await PopupNavigation.Instance.PushAsync(alert, true);
});
}
async void BoardsCollectionView_SelectionChanged(System.Object sender, Xamarin.Forms.SelectionChangedEventArgs e)
{
Debug.WriteLine("BoardsCollectionView_SelectionChanged");
if (e.CurrentSelection == null || e.CurrentSelection.Count == 0)
{
return;
}
if (sender is CollectionView collectionView)
{
collectionView.SelectedItem = null;
}
if (e.CurrentSelection[0] is OWBaseBoard baseBoard)
{
if (baseBoard.IsAvailable)
{
StopScanning();
//_selectedBoard = board;
var cancellationTokenSource = new CancellationTokenSource();
var connectingAlert = new Popup.ConnectingAlert(baseBoard.Name, new Command(() =>
{
Debug.WriteLine("Connecting alert: cancel clicked");
if (cancellationTokenSource.IsCancellationRequested == false)
{
cancellationTokenSource.Cancel();
//_selectedBoard = null;
//App.Current.OWBLE.Disconnect();
}
}));
await PopupNavigation.Instance.PushAsync(connectingAlert, true);
var board = await App.Current.ConnectToBoard(baseBoard, cancellationTokenSource.Token);
await PopupNavigation.Instance.PopAllAsync();
if (board != null)
{
await Navigation.PushModalAsync(new Xamarin.Forms.NavigationPage(new BoardPage(board)));
// Publish notification that board was connected
IWatch watchService = DependencyService.Get <IWatch>();
watchService.ListenForWatchMessages(board);
}
/*
* try
* {
* var connectTask = App.Current.OWBLE.Connect(_selectedBoard);
*
* var connected = await connectTask;
* }
* catch (TaskCanceledException)
* {
* _selectedBoard = null;
* Hud.Dismiss();
* }
* catch (Exception)
* {
* await DisplayAlert("Error", $"Unable to connect to {board.Name}.", "Cancel");
* }
*/
}
else
{
var alert = new Pages.Popup.Alert("Error", $"{baseBoard.Name} is not available.");
await PopupNavigation.Instance.PushAsync(alert, true);
}
}
}
