tkinter radiobutton

[William Gill]

p.s.  I tweaked

rbn = tk.Radiobutton(self, text=text, variable=var, value=y)
   to
rbn = tk.Radiobutton(self, text=text, variable=var, value=y+1)

   and

return tuple(row == var.get() for var in self.variables)
   to
return tuple(row+1 == var.get() for var in self.variables)

so that the Radiogrid doesn't initialize w/row 1 selected, and 
accomodates cases where nothing is selected in any column.

Bill

Peter Otten wrote:
> William Gill wrote:
> 
> 
>>I thought the problem was practical, not philosophical, but what do I
>>know I'm the one asking for help.
> 
> 
> What follows looks more like a spec than a question.
> 
> 
>>       columns can have 0 or 1 selection
>>       rows can have 0,1,2,3, or 4 selections.
> 
> 
>>Loop through the 4 intVars 4 times; compare their value to the value for
>>the row being processed; if they are the same bitor a value to a
>>rowVariable i.e. convert the column information (intVar values) to row
>>information.
> 
> 
> Here's my implementation: 
> 
> import Tkinter as tk
> 
> class Radiogrid(tk.Frame):
>     def __init__(self, master, columns, trace_write=None):
>         tk.Frame.__init__(self)
>         self.variables = []
>         self.buttons = []
>         for x, column in enumerate(columns):
>             var = tk.IntVar()
>             if trace_write:
>                 var.trace_variable("w", trace_write)
>             self.variables.append(var)
>             self.buttons.append([])
>             for y, text in enumerate(column):
>                 rbn = tk.Radiobutton(self, text=text, variable=var, value=y)
>                 rbn.grid(column=x, row=y)
>                 self.buttons[-1].append(rbn)
>     def get_row_state(self, row):
>         return tuple(row == var.get() for var in self.variables)
> 
> if __name__ == "__main__":
>     root = tk.Tk()
>     def show_state(*args):
>         for i in range(3):
>             print "row", i, rg.get_row_state(i)
>         print
>     rg = Radiogrid(root,
>      ["alpha beta gamma".split(),
>      "one two three".split(),
>      "guido van rossum".split()],
>      show_state
>     )
>     rg.pack()
>     root.mainloop()
> 
> I hope this will move further discussion from the abstract to the
> concrete :-)
> 
> Peter
>