[nono240]

Hi there !

I'm trying to write on a "Text" instance from a thread, but the interpreter crash ! Is there any such a limititations ?

Something like (pure example) :

def thread(text):
    text.add(u"Hello World from thread")

t = appuifw.Text()
appuifw.app.body = t 
t.add(u"Hello World") # Work
thread.start_new_thread(thread,(t,)) # Crash
...

What am I missing ?

[bogdan.galiceanu]

Hi,

From the PyS60 documentation:

It is possible to launch new threads via the services of thread module. Examples of such situations could
be to overcome eventual problems with the xed, relatively small stack size of the main UI application
thread; or to perform some background processing while still keeping the UI responsive. These new
threads are not allowed to directly manipulate the UI; in other words, they may not use the appuifw
module.

That seems to be true. I tried a non-appuifw thread:

import thread


def f(text):
    print "30"

thread.start_new_thread(f,tuple([None]))

and it worked.

[nono240]

Ok, thanks for information, but my UI have multiple tabs : each contains a Text object which must be updated asynchronously from data received from sockets (like a chat program)... If threads can't handle appuifw, how to do that ???

[miohtama]

Originally Posted by nono240

Ok, thanks for information, but my UI have multiple tabs : each contains a Text object which must be updated asynchronously from data received from sockets (like a chat program)... If threads can't handle appuifw, how to do that ???

Series 60 UI is effectively single threaded. If you need to trigger UI events from worker thread you need to use e32.ao_callgate() function which delegates execution to UI thread. Also, your worker and UI threads need to proper ao_sleep() functions to give execution time to other threads.

[nono240]

It works ! Exactly what I searched for ! Thanks A LOT !