Tutorial 13: Creating a Calendar Button GUI App Using Python PySimpleGUI

In this tutorial, we will be creating a simple Calendar Button GUI app using Python and PySimpleGUI. This app will allow users to select a date from a calendar and display the selected date in a text box.

Step 1: Install PySimpleGUI
First, make sure you have PySimpleGUI installed. You can install it using pip by running the following command in your terminal:

pip install PySimpleGUI

Step 2: Import the necessary libraries
Next, we need to import PySimpleGUI and the datetime library in our Python script:

import PySimpleGUI as sg
from datetime import datetime

Step 3: Create the layout of the app
Now, we will create the layout of our app using PySimpleGUI elements. We will include a text box to display the selected date and a button to open the calendar:

layout = [
    [sg.Text("Selected Date:"), sg.Input(key='-DATE-', size=(20,1)), sg.CalendarButton("Select Date", target='-DATE-', format='%Y-%m-%d')]
]

Step 4: Create the PySimpleGUI window
Next, we will create a PySimpleGUI window object with the layout we created earlier:

window = sg.Window("Calendar Button GUI App", layout)

Step 5: Run the event loop
Now, we will run the event loop to handle user interactions with the app. We will check for events using the read method and update the selected date in the text box when the calendar button is clicked:

while True:
    event, values = window.read()

    if event == sg.WIN_CLOSED:
        break

Step 6: Display the selected date
Finally, we will display the selected date in the text box when the user selects a date from the calendar:

    if event == 'Select Date':
        selected_date = values['-DATE-']
        window['-DATE-'].update(selected_date)

Step 7: Close the window
Don’t forget to close the PySimpleGUI window at the end of the script to release system resources:

window.close()

That’s it! You have now created a simple Calendar Button GUI app using Python and PySimpleGUI. You can customize the app further by adding more features and functionality. Happy coding!