Wayne Watson wrote:
> The program below is derived from an example in Grayson for showing how
> one might a dialog for entering passwords. The structure seems just like
> the original, down to the use of self, Label and Entry plus . Yet the
> print "here" statement produces:
> here None <type 'NoneType'>
> I'm missing something. The NoneType causes the print of the self.lat to
> fail with get().
>
> The original returns something from the corresponding body function, but
> taking it out does nothing in either program. The original program is
> posted above under "Modifying Grayson's Example 5_14".
>
> # Derived from Grayson 5_14.py
> from Tkinter import *
> from tkSimpleDialog import Dialog
> import tkSimpleDialog
> import tkMessageBox
> #import Pmw
>
> class DialogPrototype(Dialog):
>
> def body(self, master):
> self.title("Enter Site Data")
> Label(master, text='Latitude:').grid(row=0, sticky=W)
> self.lat=Entry(master, width=12).grid(row=0, column=1)
This is where you diverge from the Grayson example. What you're saying
is that self.lat should be set to the result of Entry(...).grid(...)
which is always None, presumably. What I think you want is self.lat to
be a reference to the Entry widget itself. Try this,
self.lat = Entry(master, width=12)
self.lat.grid(row=0, column=1)
>
> Label(master, text='Longitude:').grid(row=0, column=2)
> self.long=Entry(master, width=12).grid(row=0, column=3)
... and,
self.long = Entry(master, width=12)
self.long.grid(row=0, column=3)
> print "here", self.long,type(self.long)
> return
>
> def apply(self):
> print "apply"
> print self.lat.get()
> print self.long.get()
>
> print "setting"
> lat=1.0
> long=0.0
Is that the way you indented the above, really? I suppose it could be
intentional, but probably not.
>
> root = Tk()
> root.withdraw()
> dialog = DialogPrototype(root)
HTH,
Marty
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