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import tkinter as tk
from PIL import Image, ImageTk
import glob

def insertfiles():
    for filename in glob.glob("*.png"):
        lst.insert(tk.END, filename)
    for filename in glob.glob("*.jpg"):
        lst.insert(tk.END, filename)

def showimg(event):
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    n = lst.curselection()
    if n:
        filename = lst.get(n[0])
        img = Image.open(filename)
        w_img, h_img = img.size
        
        # Get the dimensions of the window
        w_win = root.winfo_width()
        h_win = root.winfo_height()
        
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        # Calculate the aspect ratio of the image and window
        aspect_ratio_img = w_img / h_img
        aspect_ratio_win = w_win / h_win
        
        if aspect_ratio_img > aspect_ratio_win:
            # Scale the image based on width
            new_w = w_win
            new_h = int(w_win / aspect_ratio_img)
        else:
            # Scale the image based on height
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            new_h = h_win
            new_w = int(h_win * aspect_ratio_img)
        
        img = img.resize((new_w, new_h), Image.LANCZOS)  # Use LANCZOS for resampling
        photo = ImageTk.PhotoImage(img)
        canvas.config(width=new_w, height=new_h)
        canvas.create_image(0, 0, image=photo, anchor=tk.NW)
        canvas.image = photo

root = tk.Tk()
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root.geometry("800x600+300+50")

# Create a frame to hold the listbox and scrollbar
frame = tk.Frame(root)
frame.pack(side="left", fill="y")

# Create a vertical scrollbar
scrollbar = tk.Scrollbar(frame, orient="vertical")

# Create the listbox with the scrollbar attached
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lst = tk.Listbox(frame, width=15, yscrollcommand=scrollbar.set)
scrollbar.config(command=lst.yview)

# Pack the listbox and scrollbar
lst.pack(side="left", fill="both", expand=True)
scrollbar.pack(side="right", fill="y")

lst.bind("<<ListboxSelect>>", showimg)
insertfiles()
canvas = tk.Canvas(root)
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canvas.pack(fill=tk.BOTH, expand=True)

root.mainloop()

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