/// <summary>
/// Will be called when <see cref="BluetoothLEDevice.ConnectionStatusChanged"/> is called.
/// Used as a middleman to allow subscription from outside using <see cref="DeviceConnectionChanged"/>.
/// </summary>
private void ConnectionStatusChanged(BluetoothLEDevice sender, object args)
{
if (!Connected)
{
DisconnectBand();
}
DeviceConnectionChanged?.Invoke(DeviceIndex, Connected);
}
private IoTCentral()
{
MessagingCenter.Subscribe <ResultMessage <IDevice> >(this, Constants.BLE_DEVICE_READY, (dev) => { DeviceReady?.Invoke(this, dev.Data); });
MessagingCenter.Subscribe <ResultMessage <IoTCConnectionState> >(this, Constants.IOTC_DEVICE_CLIENT_CONNECTED, result =>
{
DeviceConnectionChanged?.Invoke(this, result.Data);
});
MessagingCenter.Subscribe <ResultMessage <IList <BluetoothServiceModel> > >(this, Constants.BLE_SERVICES_FETCHED, (services) => { ServicesFetched?.Invoke(this, services.Data); });
}
private void RegisterDeviceConnectionChangedCallback()
{
Native.DeviceConnectionChangedCallback callback = (ref Native.CameraDeviceStruct device, bool status, IntPtr userData) =>
{
DeviceConnectionChanged?.Invoke(this, new CameraDeviceConnectionChangedEventArgs(ref device, status));
};
Native.SetDeviceConnectionChangedCallback(Handle, callback, IntPtr.Zero, out connectionCallbackId).
ThrowIfFailed("Failed to set device connection changed callback");
}
/// <summary>
/// Disconnects the band by disposing all references. Band will stay paired though.
/// </summary>
/// <param name="triggerEvent">Should the <see cref="DeviceConnectionChanged"/> event be triggered?</param>
public void DisconnectBand(bool triggerEvent = true)
{
if (triggerEvent)
{
DeviceConnectionChanged?.Invoke(DeviceIndex, false);
}
DeviceConnectionChanged = null;
_heartRate.Dispose();
_authentication.Dispose();
if (_connectedBtDevice != null)
{
_connectedBtDevice.ConnectionStatusChanged -= ConnectionStatusChanged;
_connectedBtDevice.Dispose();
_connectedBtDevice = null;
}
// Needed to force an immediate update of the connection-status by deleting the removed references.
GC.Collect();
}
