[Java-gnome-developer] client events

[Josh H. <jos...@ho...>]

Hello all,

I posted here a few weeks ago asking about the java-gnome implementation of 
the cross-process widgets GtkPlug and GtkSocket.  Thank you for the replies. 
  Managed to get Java widgets embedded in a C interface by adding some 
constructors and glue to Plug and sending the windowIDs through a 
DatagramSocket; however, I am having troubles modifying this prototype to 
use the glib client_event/listener scheme built into gtk to handle 
callbacks.  I have gone through the "create a new widget" tutorial and so 
far I can see three ways to possibly do this:

1. Create a new Widget in Java.  An existing widget can be extended and its 
relative Event class type overridden to recognize a client_event.  
Unfortunately, I am not aware of any resources for creating a new widget in 
Java that can send a signal recognized by gtk+ in C.

2.  Wrap the gtk+ client_message functions.  The function 
gdk_event_send_client_message was modified to accept int arguments, casted 
to the correct types, and then wrapped.

void java_gdk_event_send_client_message (int event, int  winidint)
{
  event = gdk_event_new (event);
  winid = (GdkNativeWindow)winidint;

  gdk_event_send_client_message (event, winid);
}

After calling this wrapped function in Java, the VM throws a segmentation 
violation in IA__gdk_event_send_client_message_for_display.  I suspect this 
has to do with the default display.  Is there a way I should be initializing 
this?

3. Create a new Widget in C and wrap it.  I understand this involves calling 
the glib functions g_signal_new and g_signal_emit with user defined events; 
however, I can't seem to create a Java listener to catch the signal.

Is there any easier way to handle the communication with these callbacks?  
Do any of these approaches make sense?  Suggestions?

Thanks,
~Josh Hope