void StartPeerWatcher()
{
if (peerWatcher == null)
{
peerWatcher = PeerFinder.CreateWatcher();
// Hook up events, this should only be done once
peerWatcher.Added += PeerWatcher_Added;
peerWatcher.Removed += PeerWatcher_Removed;
peerWatcher.Updated += PeerWatcher_Updated;
peerWatcher.EnumerationCompleted += PeerWatcher_EnumerationCompleted;
peerWatcher.Stopped += PeerWatcher_Stopped;
}
PeerWatcherStatus status = peerWatcher.Status;
if (status == PeerWatcherStatus.Created || status == PeerWatcherStatus.Stopped || status == PeerWatcherStatus.Aborted)
{
try
{
foundPeers.SelectionChanged -= PeersSelectionChanged;
availablePeers.Clear();
foundPeers.ItemsSource = availablePeers;
noPeersFound.Visibility = Visibility.Collapsed;
foundPeers.SelectionChanged += PeersSelectionChanged;
peerWatcher.Start();
progressBar.Visibility = Visibility.Visible;
}
catch (Exception err)
{
proximityStatus.Text = "Error starting PeerWatcher: " + err.ToString();
}
}
}
// Used to display state of the connection (i.e. connecting, connected, disconnected) when two PCs are tapped.
private async void TriggeredConnectionStateChanged(object sender, TriggeredConnectionStateChangedEventArgs e)
{
await messageDispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
bool tapIsProcessed = false;
switch (e.State)
{
case TriggeredConnectState.PeerFound:
directions.Visibility = Visibility.Collapsed;
nfcStatusText.Visibility = Visibility.Visible;
foundPeers.IsEnabled = false;
progressBar.Visibility = Visibility.Visible;
backButton.Visibility = Visibility.Collapsed;
break;
case TriggeredConnectState.Completed:
// Associate socket handed back by TriggeredConnectionStateChanged event with player connectedPeers.
socket = new SocketReaderWriter(e.Socket, this);
socket.ReadMessage();
socket.WriteMessage(string.Format("{0} {1}", Constants.OpCodeSendDisplayName, PeerFinder.DisplayName));
startGameButton.Visibility = Visibility.Visible;
tapIsProcessed = true;
break;
case TriggeredConnectState.Failed:
tapIsProcessed = true;
break;
}
// Reset UI
if (tapIsProcessed)
{
nfcStatusText.Visibility = Visibility.Collapsed;
foundPeers.IsEnabled = true;
lock (availablePeers)
{
if (availablePeers.Count > 0)
{
directions.Visibility = Visibility.Visible;
}
}
// Progress bar should be visible as long as PeerWatcher is running
progressBar.Visibility = Visibility.Collapsed;
if (peerWatcher != null)
{
PeerWatcherStatus status = peerWatcher.Status;
if (status == PeerWatcherStatus.EnumerationCompleted || status == PeerWatcherStatus.Started)
{
progressBar.Visibility = Visibility.Visible;
}
}
}
});
}
