I'm just starting out with Tkinter programming (using Programming
Python as a reference), and I couldn't find the answer to this
anywhere...
How do you catch general exceptions in a Tkinter program. If you run
the below and click the "Exception" or "Callback Exception" buttons
you see a traceback on stderr under unix, and nothing at all under
windows (if run as a pyw).
How so you catch those exceptions so that they can pop up in a dialog?
There doesn't seem to be a hook. I was imagining that there would be a
global error handler I could hook / override?
from Tkinter import *
class AppDemo(Frame):
"""A sample tk app"""
def __init__(self, parent=None):
Frame.__init__(self, parent)
self.pack(expand=YES, fill=BOTH)
self.make_tool_bar()
self.master.title("A Title")
self.bang = 0
self.process()
def process(self):
self.after(1000, self.process)
if self.bang:
self.bang = 0
raise ValueError("Callback Exception")
def make_tool_bar(self):
self.toolbar = Frame(self, cursor='hand2', relief=SUNKEN, bd=2)
self.toolbar.pack(side=BOTTOM, fill=X)
Button(self.toolbar, text='Exception',
command=self.make_exception).pack(side=TOP, fill=X)
Button(self.toolbar, text='Callback Exception',
command=self.make_callback_exception).pack(side=TOP, fill=X)
Button(self.toolbar, text='Quit', command=self.quit).pack(side=TOP,
fill=X)
def make_exception(self):
raise ValueError("Exception")
def make_callback_exception(self):
self.bang = 1
if __name__ == "__main__":
AppDemo().mainloop()
--
Nick Craig-Wood <[EMAIL PROTECTED]> -- http://www.craig-wood.com/nick
--
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