from javax.swing import JTextPane, JFrame
from java.awt.event import KeyEvent
from java.lang import System
import threading
import sys

def keyPressed(event):
    print >> sys.stderr, 'keyPressed'

text_pane = JTextPane(keyPressed=keyPressed)
frame = JFrame()
frame.getContentPane().add(text_pane)
frame.setBounds(50, 50, 500, 500)
frame.visible = True

def trace_dispatch(frame, event, arg):
    if frame.f_code.co_name == 'keyPressed':
        #This code is never called when entering text at Jython 2.5, but it works in Jython 2.2.1
        print 'trace_dispatch at: %s' % (frame.f_code.co_name,)

key = KeyEvent(text_pane, KeyEvent.KEY_PRESSED, System.currentTimeMillis(), 0, KeyEvent.VK_0, '0')
if hasattr(threading, 'settrace'): #Jython 2.2.1 does not have it.
    threading.settrace(trace_dispatch)
#sys.settrace(trace_dispatch)