Tips for PySimpleGUI – Demonstrating Math Functions with Calendar Button and Base64 Images

PySimpleGUI is a Python library that allows you to easily create Graphical User Interfaces (GUIs) in a simple and intuitive way. One of the many useful features of PySimpleGUI is the ability to add a Calendar Button to your GUI, which allows users to select dates visually.

In this tutorial, we will demonstrate how to create a Calendar Button in PySimpleGUI and perform math operations on the selected date. Additionally, we will show you how to display Base64 images in the GUI.

Step 1: Install PySimpleGUI

First, make sure you have PySimpleGUI installed on your system. You can install it using pip by running the following command:

pip install PySimpleGUI

Step 2: Import the necessary modules

Next, import the required modules from PySimpleGUI:

import PySimpleGUI as sg
import base64
from datetime import datetime

Step 3: Define the layout of the GUI

Now, let’s define the layout of the GUI. We will create a window with a Calendar Button and a Text element to display the selected date. We will also add an Image element to display a Base64 image. Here’s the code:

layout = [
    [sg.CalendarButton('Select Date'), sg.Text('Selected Date: ', key='_DATE_')],
    [sg.Text('Base64 Image: '), sg.Image(key='_IMAGE_')]
]

Step 4: Create the window and run the event loop

Next, create the window using the defined layout and run the event loop to handle user interactions. Here’s the code:

window = sg.Window('Calendar Button Math Demo', layout)

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

    if event == sg.WIN_CLOSED:
        break

    if isinstance(event, tuple):
        selected_date = datetime.strptime(event[1], '%Y-%m-%d')
        window['_DATE_'].update(f"Selected Date: {selected_date.strftime('%m/%d/%Y')}")

    # Display a Base64 image
    with open("image.jpg", "rb") as f:
        encoded_image = base64.b64encode(f.read())
        window['_IMAGE_'].update(data=encoded_image)

In the event loop, we check for the event triggered by the Calendar Button. If the event is a tuple, it means that a date has been selected. We then convert the selected date string to a datetime object and update the Text element with the formatted date.

Step 5: Run the program

Finally, run the program by adding the following code at the end:

window.close()

That’s it! You have successfully created a Calendar Button in PySimpleGUI and displayed a Base64 image in the GUI. This tutorial demonstrates how easy it is to create interactive GUIs using PySimpleGUI. Feel free to customize the layout and add more functionality to your GUI.