Tkinter callback arguments

[Brian J Mingus]

On Mon, Nov 2, 2009 at 2:26 AM, Peter Otten <__peter__ at web.de> wrote:

> Alf P. Steinbach wrote:
>
> >>     for x in range(0,3):
> >>         Button(......, command=lambda x=x: function(x))
> >
> > An alternative reusable alternative is to create a button-with-id class.
> >
> > This is my very first Python class so I'm guessing that there are all
> > sorts of issues, in particular naming conventions.
>
> Pseudo-private attributes, javaesque getter methods, unidiomatic None-
> checks, broken naming conventions (**args), spaces in funny places...
>
> > And the idea of creating a reusable solution for such a small issue may
> be
> > un-pythonic?
>
> Screw pythonic, the signal/noise ratio is awful in any language.
>
> > But just as an example, in Python 3.x,
>
> ...for achieving less in more lines?
>
> > <code>
> > import tkinter
> > # I guess for Python 2.x do "import Tkinter as tkinter" but haven't
> > # tested.
> >
> >
> > class IdButton( tkinter.Button ):
> >      def __init__( self, owner_widget, id = None, command = None, **args
> >      ):
> >          tkinter.Button.__init__(
> >              self, owner_widget, args, command = self.__on_tk_command
> >              )
> >          self.__id = id
> >          self.__specified_command = command
> >
> >      def __on_tk_command( self ):
> >          if self.__specified_command != None:
> >              self.__specified_command( self )
> >          else:
> >              self.on_clicked()
> >
> >      def on_clicked( self ):
> >          pass
> >      def id( self ):
> >          return self.__id
> >      def id_string( self ):
> >          return str( self.id() );
> >
> >
> > def on_button_click( aButton ):
> >      print( "Button " + aButton.id_string() + " clicked!" )
> >
> > window = tkinter.Tk()
> >
> > n_buttons = 3
> > for x in range( 1, n_buttons + 1 ):
> >      IdButton(
> >          window, id = x, text = "Button " + str( x ), command =
> >          on_button_click ).pack()
> >
> > window.mainloop()
> > </code>
>
> I'm not grumpy, I just don't like your code ;) And I don't like the notion
> that you are about to spread this style with your book...
>
> Peter


I was going to agree with you (
particularly about this
)
but then I saw your __email address__ and realized that you, too, have no
style.
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