Welcome folks today in this blog post we will be building a dropdown formatted calendar widget widget in tkinter using python. All the full source code of the application is shown below.
Get Started
In order to get started you need to make an app.py file and copy paste the following code
app.py
from tkinter import Tk
from calendar_widget import *
root = Tk()
calendar = CalendarWidget(root)
root.mainloop()
date_time = calendar.get_date_time()
# the keys are: 'year', 'month', 'day', 'hour', 'minutes' and 'seconds'
if date_time:
year = date_time['year']
month = date_time['month']
day = date_time['day']
date = year + '_' + month + '_' + day
hour = date_time['hour']
minutes = date_time['minutes']
seconds = date_time['seconds']
time = hour + ':' + minutes + ':' + seconds
print(date + ' ' + time)
Now we need to create the calendar_widget.py file and copy paste the following code
calendar_widget.py
#!/usr/intel/bin/python -w
'''Created by: Eugeny Khanchin - 07 Jun 2020
This module contains a calendar widget.
'''
import datetime
from tkinter import *
from tkinter import ttk
class CalendarWidget:
'''
The widget returns date and time in a dictionary. To get this dictionary
you have to use a get_date_time() function.
Attributes
----------
master : object
tkinter root window object
date_time : dict
A dictionary where every date and time element is a key
Public Functions
----------------
get_date_time()
Returns a dictionary of date and time elements
Example
-------
root = tkinter.Tk()
calendar = CalendarWidget(root)
root.mainloop()
date_time = calendar.get_date_time()
# the keys are: 'year', 'month', 'day', 'hours', 'minutes' and 'seconds'
print(date_time['year'])
print(date_time['minutes'])
'''
def __init__(self, master):
'''
Parameters
----------
master : object
tkinter root window object
'''
self.master = master
master.title('Calendar')
master.geometry('520x275+200+100')
master.resizable(False, False)
# App's private variables
self._months = self._get_month_names()
self._months_days = self._get_months_days_dict()
self._clicked_button = None
self._date = ''
self._time = ''
self.date_time = {}
# Configures style for app's widgets
self._configure_style()
ttk.Label(master, text='Select date and time').place(x=10, y=10)
ttk.Frame(master, height=2, borderwidth=1, relief='flat', \
style='Hor.TFrame')\
.place(x=0, y=37, width=523)
ttk.Frame(master, width=1, borderwidth=1, relief='flat', \
style='Ver.TFrame')\
.place(x=317, y=50, height=221)
selected_date_label = ttk.Label(master, text='')
selected_date_label.place(x=359, y=149)
self._selected_date_label = selected_date_label
# Date fields
self._create_date_fields()
# Time fields
self._create_time_fields()
ttk.Button(master, text='Select', command=self._select_date_time, \
style='Select.TButton')\
.place(x=360, y=226, width=120, height=40)
def _get_month_names(self):
'''Returns list of month names'''
return ('January', 'February', 'March', 'April', 'May', 'June', \
'July', 'August', 'September', 'October', 'November', 'December')
def _get_months_days_dict(self):
'''
Returns a dictionary where keys are months and values are their
number of days
'''
months_days = {}
months_days['January'] = 31
months_days['February'] = 28
months_days['March'] = 31
months_days['April'] = 30
months_days['May'] = 31
months_days['June'] = 30
months_days['July'] = 31
months_days['August'] = 31
months_days['September'] = 30
months_days['October'] = 31
months_days['November'] = 30
months_days['December'] = 31
return months_days
def _configure_style(self):
'''Contains all style configurations'''
style = ttk.Style()
# Root window's background color
style.configure('TLabel', background='#e0dfde')
style.configure('TButton', background='#e0dfde')
# Custom style
style.configure('Hor.TFrame', background='#6a9eba')
style.configure('Ver.TFrame', background='#000000')
style.configure('TCombobox', selectbackground=[('normal', 'white')])
style.configure('TCombobox', selectforeground=[('normal', 'black')])
style.configure('Day.TButton', background='#e0dfde', relief='flat')
style.configure('Day.Clicked.TButton', background='#8cd0f5', \
relief='flat')
style.configure('Select.TButton', background='#6a9eba', \
foreground='#ffffff', font=('', 12, 'bold'))
def _create_date_fields(self):
'''Creates all relevant to date fields'''
# Month selection fields
ttk.Label(self.master, text='Month:').place(x=10, y=50)
self._month = StringVar()
month_combobox = ttk.Combobox(self.master, width=9, \
textvariable=self._month)
month_combobox.place(x=58, y=50)
month_combobox.bind('<<ComboboxSelected>>', self._enable_month_days)
self._month_combobox = month_combobox
self._load_months()
# Year selection fields
ttk.Label(self.master, text='Year:').place(x=183, y=50)
self._year = StringVar()
year_combobox = ttk.Combobox(self.master, width=9, \
textvariable=self._year)
year_combobox.place(x=222, y=50)
year_combobox.bind('<<ComboboxSelected>>', self._enable_month_days)
self._year_combobox = year_combobox
self._load_years()
# Days of the month buttons
days_buttons = []
days = 31
x = 35
y = 87
for i in range(1, days+1):
# Creates a button with disabled state
button = ttk.Button(self.master, text=str(i), style='Day.TButton')
button.configure(command=lambda btn=button: \
self._day_button_callback(btn))
button.place(x=x, y=y, width=35, height=35)
button.state(['disabled'])
days_buttons.append(button)
# Updates the x,y location
x += 35
if i % 7 == 0:
x = 35
y += 35
self._days_buttons = days_buttons
def _create_time_fields(self):
'''Creates all relevant to time fields'''
# Hour selection fields
ttk.Label(self.master, text='Hours').place(x=331, y=50)
hour_combobox = ttk.Combobox(self.master, width=3, values=[*range(0,24)])
hour_combobox.place(x=333, y=70)
hour_combobox.bind('<<ComboboxSelected>>', self._load_time)
self._hour_combobox = hour_combobox
# Minutes selection fields
ttk.Label(self.master, text='Minutes').place(x=388, y=50)
minutes_combobox = ttk.Combobox(self.master, width=3, \
values=[*range(0,60)])
minutes_combobox.place(x=396, y=70)
minutes_combobox.bind('<<ComboboxSelected>>', self._load_time)
self._minutes_combobox = minutes_combobox
# Seconds selection fields
ttk.Label(self.master, text='Seconds').place(x=456, y=50)
seconds_combobox = ttk.Combobox(self.master, width=3, \
values=[*range(0,60)])
seconds_combobox.place(x=467, y=70)
seconds_combobox.bind('<<ComboboxSelected>>', self._load_time)
self._seconds_combobox = seconds_combobox
def _load_months(self):
'''Loads months names into combobox'''
self._month_combobox.configure(values=self._months)
def _load_years(self):
'''Loads years into combobox beggining from 1990'''
now = datetime.datetime.now()
years = [*range(1990, now.year+1)]
years.reverse()
self._year_combobox.configure(values=years)
def _enable_month_days(self, event=None):
'''Enables relevant days of a selected month'''
month = self._month_combobox.get()
year = self._year_combobox.get()
if month and year:
# Fields are not empty
days = self._months_days[month]
year = int(year)
if month == 'February' and year % 4 == 0:
# Leap year - 29 days
days += 1
i = 0
while i <= days-1:
# Enables days of a month
self._days_buttons[i].state(['!disabled'])
self._days_buttons[i].configure(style='Day.TButton')
i += 1
while i < 31:
# Disables days that exceed the number of days in a month
self._days_buttons[i].state(['disabled'])
self._days_buttons[i].configure(style='Day.TButton')
i += 1
self._selected_date_label.configure(text='')
def _day_button_callback(self, button):
'''A callback of a days of the month button'''
if self._clicked_button:
self._clicked_button.configure(style='Day.TButton')
button.configure(style='Day.Clicked.TButton')
self._clicked_button = button
# Updates selected_date_label text
month = self._month_combobox.get()
month = str(self._months.index(month)+1)
day = button.cget('text')
year = self._year_combobox.get()
date = month + '/' + day + '/' + year
self._date = date
self._update_date_time_label()
def _load_time(self, event=None):
'''Time selection fields\' callback'''
hour = self._hour_combobox.get()
minutes = self._minutes_combobox.get()
seconds = self._seconds_combobox.get()
if hour and minutes and seconds:
# No empty fields
if int(hour) < 10:
hour = '0' + hour
if int(minutes) < 10:
minutes = '0' + minutes
if int(seconds) < 10:
seconds = '0' + seconds
time = hour + ':' + minutes + ':' + seconds
self._time = time
self._update_date_time_label()
def _update_date_time_label(self):
'''Updates date and time label'''
if self._date and self._time:
self._selected_date_label.configure(\
text=self._date + ' ' + self._time)
def _select_date_time(self):
'''Creates and saves a dictionary of date and time.
After a dictionary is created the window is closed.
'''
month = self._month_combobox.get()
year = self._year_combobox.get()
day = ''
if self._clicked_button:
day = self._clicked_button.cget('text')
hour = self._hour_combobox.get()
minutes = self._minutes_combobox.get()
seconds = self._seconds_combobox.get()
if month and year and day and hour and minutes and seconds:
date_time = {}
month = str(self._months.index(month)+1)
if int(month) < 10:
month = '0' + month
if int(day) < 10:
day = '0' + day
date_time['month'] = month
date_time['year'] = year
date_time['day'] = day
if int(hour) < 10:
hour = '0' + hour
if int(minutes) < 10:
minutes = '0' + minutes
if int(seconds) < 10:
seconds = '0' + seconds
date_time['hour'] = hour
date_time['minutes'] = minutes
date_time['seconds'] = seconds
self.date_time = date_time
self.master.destroy()
def get_date_time(self):
'''Returns a dictionary of date and time elements'''
return self.date_time
Now if you execute the python script by typing the below command as shown below
python app.py
