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POTkinter menu for chosing a date
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copied!<p>I am building a dropdown menu that would be used to choose a starting date. It has 3 cascades named year, month, day. The contents of the day cascade is generated so that the available days are true to the chosen year and month. It is possible/probable that the user is going to change the date several times during a single session.</p> <p>My problem: When the user selects the year/month for the first time, the days commands get generated. Thereafter any new year/month combination, the following code just adds the commands to the cascade. So that the day cascade contains the days of two months.</p> <p><img src="https://i.stack.imgur.com/03gkI.jpg" alt=""></p> <p>I have been trying to make the code remove the old menubar entry daymenu and recreate it based on the new data. I would like to know, how does one do such changes to a preexisting, running menubar? I have searched the tkinter documentation, but could not out how to implement it.</p> <pre><code>import calendar as cal import Tkinter as tk import datetime import os.path window = tk.Tk() # Menu variables: year = tk.IntVar() month = tk.IntVar() day = tk.IntVar() hour = tk.IntVar() minute = tk.IntVar() dur_hour = tk.IntVar() dur_minute = tk.IntVar() duration = tk.StringVar() start = tk.StringVar() # list initializations list_of_years = [] list_of_months = [] list_of_hours = [] list_of_days = [] list_of_minutes = [] def year_seter(value): year.set(value) all_for_day() def all_for_day(): #checks if the data needed to determine number of days in the month is present list_of_days = [] y = year.get() m = month.get() lenght_of_month = cal.monthrange(y,m) lenght_of_month2 = lenght_of_month[1] if m != 0 and y != 0: make_daylist(lenght_of_month2) make_daymenu() def month_seter(value): month.set(value) all_for_day() def day_seter(value): day.set(value) def time_parameters(): the_date = datetime.datetime(1,1,1,0,0,0,0) the_date = the_date.now() end_year = the_date.year make_yearlist(1995, end_year) make_monthlist() make_hourlist() make_minutelist() def make_yearlist(the_year, end_year): while the_year <= end_year: list_of_years.append(the_year) the_year += 1 def make_monthlist(): for i in range(12): list_of_months.append(i + 1) def make_daylist(num_days): for i in range(num_days): list_of_days.append(i + 1) def make_hourlist(): for i in range(24): list_of_hours.append(i) def make_minutelist(): for i in range(60): list_of_minutes.append(i) def make_daymenu(): for the_day in list_of_days: daymenu.add_command(label=the_day, command=lambda : day_seter(the_day)) window.config(menu=menubar) # The following constructs the menu time_parameters() menubar = tk.Menu(window) yearmenu = tk.Menu(menubar) for the_year in list_of_years: yearmenu.add_command(label=str(the_year), command=lambda the_year=the_year: year_seter(the_year)) menubar.add_cascade(label = 'Year', menu=yearmenu) window.config(menu=menubar) monthmenu = tk.Menu(menubar) for the_month in list_of_months: monthmenu.add_command(label=the_month, command=lambda the_month=the_month: month_seter(the_month)) menubar.add_cascade(label = 'Month', menu=monthmenu) window.config(menu=menubar) daymenu = tk.Menu(menubar) menubar.add_cascade(label = 'Day', menu=daymenu) window.config(menu=menubar) window.mainloop() </code></pre>

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