Python Tkinter simple image viewer: Open and display images

Last update on December 21 2024 07:47:49 (UTC/GMT +8 hours)

Write a Python program to build a simple image viewer using Tkinter. The system allows the user to open and display image files.

Sample Solution:

Python Code:

import tkinter as tk
from tkinter import filedialog
from PIL import Image, ImageTk
def open_image():
    file_path = filedialog.askopenfilename(title="Open Image File", filetypes=[("Image files", "*.png *.jpg *.jpeg *.gif *.bmp *.ico")])
    if file_path:
        display_image(file_path)
def display_image(file_path):
    image = Image.open(file_path)
    photo = ImageTk.PhotoImage(image)
    image_label.config(image=photo)
    image_label.photo = photo
    status_label.config(text=f"Image loaded: {file_path}")
root = tk.Tk()
root.title("Simple Image Viewer")
text_widget = tk.Text(root, wrap=tk.WORD, height=15, width=35)
open_button = tk.Button(root, text="Open Image", command=open_image)
open_button.pack(padx=20, pady=10)
image_label = tk.Label(root)
image_label.pack(padx=20, pady=20)
status_label = tk.Label(root, text="", padx=20, pady=10)
status_label.pack()
root.mainloop()

Explanation:

In the exercise above -

• Import "tkinter" as "tk" and "filedialog" for creating the GUI components and opening the folder dialog. We also import PIL (Pillow) to work with images.
• Define the "open_image()" function, which opens the file dialog using "filedialog.askopenfilename()". This dialog allows the user to select an image file with specified file types (PNG, JPG, JPEG, GIF, BMP, ICO). If a file is selected, it calls the "display_image()" function.
• Define the "display_image()" function, which opens the selected image file using Pillow (Image.open()) and displays it in a Tkinter label widget. The ImageTk.PhotoImage class converts the image into a format that can be displayed in Tkinter. The status label shows the loaded image path.
• Create the main Tkinter window, set its title, and create an "Open Image" button that calls the open_image() function when clicked.
• Create a label widget (image_label) to display the loaded image, and a status label to show messages about image loading.
• The main event loop, root.mainloop(), starts the Tkinter application.

Sample Output:

Flowchart:

Python Code Editor:

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