PDF page fill ration counter, drag and drop, GUI Tkinter

FillRatioPDF.py

import fitz
import tkinter as tk
from tkinter import ttk
from tkinter import *
from tkinter import filedialog
from tkinterdnd2 import DND_FILES, TkinterDnD

def on_drop(file_path):
    # Split multiple files:
    paths = file_path.split(' ')
    # Process the dropped file
    results_text.delete(1.0, tk.END)
    for p in paths:
        results_text.insert(tk.END, p+"\n")
        estimate_pdf_fill(p)

    
def select_pdf_button():
    # Open a file dialog to select the PDF document
    file_path = filedialog.askopenfilename(
        title="Select PDF document", filetypes=(("PDF files", "*.pdf"), ("all files", "*.*"))
    )
    results_text.delete(1.0, tk.END)
    results_text.insert(tk.END, file_path+"\n")
    estimate_pdf_fill(file_path)

def estimate_pdf_fill(file_path):
    # Check if PDF
    if not file_path.endswith(".pdf"):
        results_text.insert(tk.END, f"Not PDF.\n")
        return

    # Open the PDF file
    pdf_doc = fitz.open(file_path)

    # Initialize the number of blank and colored pixels
    blank_pixels = 0
    colored_pixels = 0

    zoom_x = 2  # horizontal zoom
    zoom_y = 2  # vertical zoom
    mat = fitz.Matrix(zoom_x, zoom_y)  # zoom factor 2 in each dimension

    #results_text.delete(1.0, tk.END)
    total_white_perc, total_color_perc = 0, 0
    page_count = pdf_doc.page_count
    for page_num in range(page_count):
        page = pdf_doc.load_page(page_num)
        pix = page.get_pixmap(matrix=mat)
        color_count = pix.color_count(colors=True)
        total_pixels = sum(color_count.values())
        white_pixels = color_count.get(b'\xff\xff\xff') or 0
        color_pixels = total_pixels - white_pixels
        white_perc = white_pixels / total_pixels * 100
        color_perc = color_pixels / total_pixels * 100
        total_white_perc += white_perc
        total_color_perc += color_perc
        results_text.insert(tk.END, f"Page {page_num + 1 } - Fill: {color_perc:.2f}%\n")
        
    avg_white_perc = total_white_perc / page_count
    avg_color_perc = total_color_perc / page_count
    results_text.insert(tk.END, f"Average for {page_count} page(s) - Fill: {avg_color_perc:.2f}%\n")
        
    pdf_doc.close()

root = TkinterDnD.Tk()
root.title("PDF Fill Percentage")

root.columnconfigure(0, weight=1)
root.rowconfigure(1, weight=1)
    
ttk.Button(root, text="Open file", command=select_pdf_button).grid(column=0, row=0, sticky=(tk.N, tk.W))

results_text = tk.Text(root)#, height=20, width=90)
results_text.grid(column=0, row=1, sticky=(tk.N, tk.W, tk.E, tk.S))
results_text.insert(tk.END, "Drag and drop PDF files here.")

results_text.drop_target_register(DND_FILES)
results_text.dnd_bind('<<Drop>>', lambda e: on_drop(e.data))

for child in root.winfo_children(): child.grid_configure(padx=5, pady=5)

root.mainloop()