Claus Tondering wrote:
>I am trying to make a Tkinter main window appear and disappear, but I
> have problems with that.
>
> Here is a small code sample:
>
> class MyDialog(Frame):
> def __init__(self):
> Frame.__init__(self, None)
> Label(self, text="Hello").pack()
> Button(self, text="OK", command=self.ok).pack()
> self.grid()
>
> def ok(self):
> self.destroy()
> self.quit()
>
> MyDialog().mainloop()
> print "Now waiting 5 seconds"
> time.sleep(5)
> MyDialog().mainloop()
>
> The first mainloop() shows the dialog nicely, and I press the "OK"
> button. The system then sleeps for 5 seconds, and a new dialog is
> displayed. This is all very nice.
>
> But during the 5 seconds of sleeping, remnants of the old window are
> still visible. It is not redrawn, but it just lies there as an ugly box
> on the display. I thought that destroy()/quit() would completely remove
> the window, but obviously I am wrong.
your program can (quite obviously) not process any events when it's stuck
inside time.sleep(). adding a call to self.update() before you quit the event
loop should do the trick:
def ok(self):
self.destroy()
self.update() # process all queued events
self.quit()
</F>
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