My application: "starting window" with some misc. buttons etc. & server socket connection is running at the same time in a new thread.
When connection is made, the starting windows is closed and the main window will be opened.
Problem: I can't close the starting window which is Toplevel window, if I try to withdraw or destroy it, the application freeze.
I'm quite newbie so please try to answer as clearly as possible =) -
from Tkinter import *
-
import threading
-
-
master = Tk() #make the main window and hide it
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master.minsize(width=300, height=300)
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master.withdraw()
-
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class first_window():
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def __init__(self):
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global start_window
-
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def thread_is_finished(self):
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main_app() #CONNECTION is made, start main application window
-
-
# start_window.withdraw() #APPLICATION HANGS IF I TRY TO HIDE THIS?!?
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# start_window.destroy() #DESTROY DOESN'T WORK EITHER :(
-
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start_window = Toplevel() #show the starting window
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start_window.minsize ( width=150, height=150 )
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start_window.bind("<<foo>>",thread_is_finished)
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master.update() #update (bind will be "saved")
-
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server_start().start() #start the server in a new thread
-
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class main_app():
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def __init__(self):
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master.deiconify() #show the main window
-
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class server_start ( threading.Thread ):
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def run (self):
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global start_window
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#...here's the server socket code...
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start_window.event_generate("<<foo>>") #when finished generate event
-
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master.after_idle(first_window) #after mainloop start first_window
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master.mainloop()
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3  3279  bartonc 6,596
Recognized Expert Expert
Tkinter does not provide a thread-safe environment. What you are attempting is possible, but you'll need a better toolkit. These days, wxPython is what's hot (IMO). Some useful links can be found in this article.
Hope that helps...
I FOUND THE SOLUTION, damn I'm happy =D
wise man words: "Eric Brunel wrote:
> This is where the problem is: if you do just a event_generate without
> specifying the 'when' option, the binding is fired immediately in the
> current thread. To be sure that an event is created and that the thread
> switch actually happens, do: "app.event_gene rate("<<myevent 1>>", when='tail')"
so for my code: - start_window.event_generate("<<foo>>", when='tail')
and now the code is not crashing when trying to close first window
, thx Bartonc but I have about 1300lines of code (about 2weeks work) and I don't want to change GUI now =) and I like using .place for placing gui components ;-D
is wxpython more thread-safe then?
bartonc 6,596
Recognized Expert Expert
I FOUND THE SOLUTION, damn I'm happy =D
wise man words: "Eric Brunel wrote:
> This is where the problem is: if you do just a event_generate without
> specifying the 'when' option, the binding is fired immediately in the
> current thread. To be sure that an event is created and that the thread
> switch actually happens, do: "app.event_gene rate("<<myevent 1>>", when='tail')"
Thanks for that. Mr Brunel is certainly prolific. Here's the link: python mail list
so for my code:
- start_window.event_generate("<<foo>>", when='tail')
and now the code is not crashing when trying to close first window
, thx Bartonc but I have about 1300lines of code (about 2weeks work) and I don't want to change GUI now =) and I like using .place for placing gui components ;-D
is wxpython more thread-safe then?
I'm impressed that Tkinter is working in this manner. wxPython is a complete toolkit for working on (w)indows and (x) platforms, including threads and processes.
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