/// <summary>
/// Unregisters a change event callback for given key.
/// </summary>
/// <param name="key">The runtime information key which wants to unregister callback.</param>
/// <param name="callback">The callback function to unsubscribe.</param>
/// <exception cref="ArgumentException">Thrown when the <paramref name="key"/> is invalid.</exception>
internal static void UnsetCallback(RuntimeInfoKey key, EventHandler <RuntimeFeatureStatusChangedEventArgs> callback)
{
RuntimeInfoEventHandler handler = null;
FindEventHandler(key, ref handler);
if (handler == null)
{
Log.Error(InformationErrorFactory.LogTag, "Invalid key");
InformationErrorFactory.ThrowException(InformationError.InvalidParameter);
}
handler.EventHandler -= callback;
}
private static void FindEventHandler(RuntimeInfoKey key, ref RuntimeInfoEventHandler handler)
{
switch (key)
{
case RuntimeInfoKey.Bluetooth:
handler = BluetoothEnabled;
break;
case RuntimeInfoKey.WifiHotspot:
handler = WifiHotspotEnabled;
break;
case RuntimeInfoKey.BluetoothTethering:
handler = BluetoothTetheringEnabled;
break;
case RuntimeInfoKey.UsbTethering:
handler = UsbTetheringEnabled;
break;
case RuntimeInfoKey.PacketData:
handler = PacketDataEnabled;
break;
case RuntimeInfoKey.DataRoaming:
handler = DataRoamingEnabled;
break;
case RuntimeInfoKey.Vibration:
handler = VibrationEnabled;
break;
case RuntimeInfoKey.AudioJack:
handler = AudioJackConnected;
break;
case RuntimeInfoKey.Gps:
handler = GpsStatusChanged;
break;
case RuntimeInfoKey.BatteryIsCharging:
handler = BatteryIsCharging;
break;
case RuntimeInfoKey.TvOut:
handler = TvOutConnected;
break;
case RuntimeInfoKey.AudioJackConnector:
handler = AudioJackConnectorChanged;
break;
case RuntimeInfoKey.Charger:
handler = ChargerConnected;
break;
case RuntimeInfoKey.AutoRotation:
handler = AutoRotationEnabled;
break;
default:
handler = null;
break;
}
}