/// <summary>
/// Called when a .NET event that must be propagated to Flutter is raised.
/// This method propagates the event through <see cref="OnPlatformEvent"/>
/// so that <see cref="FlutnetBridge"/> can subscribe and send data to Flutter.
/// </summary>
private static void PropagatePlatformEvent(string serviceName, string eventName, object sender, EventArgs eventArgs)
{
OnPlatformEventArgs args = new OnPlatformEventArgs
{
ServiceName = serviceName,
EventName = eventName,
EventData = eventArgs
};
OnPlatformEvent?.Invoke(sender, args);
}
private void FlutnetRuntimeOnPlatformEvent(object sender, OnPlatformEventArgs e)
{
// Prevent dispatching events to Flutter through event channel
// if bridge is configured for WebSocket communication
if (Mode == FlutnetBridgeMode.WebSocket)
{
return;
}
FlutnetEventInfo eventInfo = new FlutnetEventInfo
{
InstanceId = e.ServiceName,
EventName = e.EventName.FirstCharLower(),
EventData = e.EventData
};
NSObject eventValue = FlutterInterop.ToMethodChannelResult(eventInfo);
// As stated here https://docs.microsoft.com/en-US/xamarin/essentials/main-thread#determining-if-code-is-running-on-the-main-thread:
// The platform implementations of BeginInvokeOnMainThread themselves check if the call is made on the main thread.
// There is very little performance penalty if you call BeginInvokeOnMainThread when it's not really necessary.
if (!MainThread.IsMainThread)
{
MainThread.BeginInvokeOnMainThread(() =>
{
try
{
_streamHandler.EventSink?.Invoke(eventValue);
}
catch (Exception ex)
{
// TODO: Properly log any error
Console.WriteLine(ex.Message);
}
});
}
else
{
try
{
_streamHandler.EventSink?.Invoke(eventValue);
}
catch (Exception ex)
{
// TODO: Properly log any error
Console.WriteLine(ex.Message);
}
}
}
private void FlutnetRuntimeOnPlatformEvent(object sender, OnPlatformEventArgs e)
{
// Prevent dispatching events to Flutter through event channel
// if bridge is configured for WebSocket communication
if (Mode == FlutnetBridgeMode.WebSocket)
{
return;
}
FlutnetEventInfo eventInfo = new FlutnetEventInfo
{
InstanceId = e.ServiceName,
EventName = e.EventName.FirstCharLower(),
EventData = e.EventData
};
Object eventValue = FlutterInterop.ToMethodChannelResult(eventInfo);
if (!MainThread.IsMainThread)
{
MainThread.BeginInvokeOnMainThread(() =>
{
try
{
_streamHandler.EventSink?.Success(eventValue);
}
catch (Exception ex)
{
// TODO: Properly log any error
Console.WriteLine(ex.Message);
}
});
}
else
{
try
{
_streamHandler.EventSink?.Success(eventValue);
}
catch (Exception ex)
{
// TODO: Properly log any error
Console.WriteLine(ex.Message);
}
}
}
private void FlutnetRuntimeOnPlatformEvent(object sender, OnPlatformEventArgs e)
{
FlutnetEventInfo eventInfo = new FlutnetEventInfo
{
InstanceId = e.ServiceName,
EventName = e.EventName.FirstCharLower(),
EventData = e.EventData
};
FlutnetMessage message = new FlutnetMessage()
{
MethodInfo = new FlutnetMethodInfo
{
RequestId = -1,
Instance = e.ServiceName
},
Result = null,
EventInfo = eventInfo
};
Send(message);
}