Kevin Walzer wrote:
> I'm trying to toggle the visibility of a Tkinter widget using
> pack_forget(), and I'm running into unexpected behavior. The widget
> "hides" correctly, but does not become visible again. My sample code is
> below:
>
> ----
> from Tkinter import *
>
> root = Tk()
>
> label = Label(text="Hello")
> label.pack()
>
> def toggle():
> if label.winfo_ismapped:
> print "mapped"
> label.pack_forget()
> else:
> label.pack()
>
> button = Button(text="Push me", command=toggle)
> button.pack()
>
> root.mainloop()
> -----
>
> The expected behavior is for the label to hide ("pack_forget()") if
> label.winfo_ismapped returns true. That works as . However, I would also
> expect the widget to be displayed/packed if it is not mapped. What
> happens instead is that the label is apparently mapped even after I call
> label.pack_forget().
>
> Can anyone point out what I'm doing wrong? Calling "pack forget" from
> Tcl maps/unmaps the widget as expected. In this case, I can't quite
> figure out where my error is.
>
if label.winfo_ismapped: always evaluates to True.
Instead, you need,
if label.winfo_ismapped():
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