Is there a better way to update Tkinter text widget when using image_create?

Question

This code works fine and does exactly what I want but in the larger application that it is used in, when loading a new PDF or using the zoom in/zoom out buttons, the frame flickers not nearly as quickly as I would like or at all if possible. Basically, this takes in a pdf and uses the fitz library in Python to change it to an image and place it in a tkinter text widget using image_create. I would also like a better way of zooming but this was the only way I could think to do it.

Here's the code:

import tkinter as tk
from tkinter import filedialog
import ttkbootstrap as tb
import fitz

#----------------------------------------------------------

class PDFExample(tb.Frame):

    #------------------------------------------------------
    def __init__(self, root, filename=None):
        super().__init__(root)

        self.root = root
        self.filename = filename

        self.pack(fill='both', expand=True)

        self.dpi = 100

        # Setup
        self.setupViewer()

        self.checkSelection()

    #------------------------------------------------------
    def setupViewer(self):
        # Create 2 Frames
        self.pdf_frame = tb.Frame(self)
        self.pdf_frame.pack(side='left', fill='both',
            expand=1)

        self.button_frame = tb.Frame(self)
        self.button_frame.pack(side='right', fill='y')

        # Create PDF Viewer
        self.pdfViewer()

        # Create Buttons
        self.open_button = tb.Button(self.button_frame,
            text='Open PDF', command=self.open)
        self.open_button.grid(row=0, column=0,
            padx=5, pady=5, sticky='nsew')
        
        self.save_button = tb.Button(self.button_frame,
            text='Save PDF', command=self.save,
            state='disabled')
        self.save_button.grid(row=1, column=0,
            padx=5, pady=5, sticky='nsew')

        self.zoom_in = tb.Button(self.button_frame,
            text='Zoom In', command=self.zoomIn,
            state='disabled')
        self.zoom_in.grid(row=2, column=0,
            padx=5, pady=5, sticky='nsew')

        self.zoom_out = tb.Button(self.button_frame,
            text='Zoom Out', command=self.zoomOut,
            state='disabled')
        self.zoom_out.grid(row=3, column=0,
            padx=5, pady=5, sticky='nsew')

    #------------------------------------------------------
    def checkSelection(self):
        if self.filename is not None and os.file.exists(self.filename):
            self.save_button.config(state='enable')
            self.zoom_in.config(state='enable')
            self.zoom_out.config(state='enable')
            # Show PDF
            self.createPDF()
            self.addImage()

    #------------------------------------------------------
    def pdfViewer(self):
        scroll_y = tk.Scrollbar(self.pdf_frame,
            orient='vertical', width=16)
        scroll_x = tk.Scrollbar(self.pdf_frame,
            orient='horizontal', width=16)

        scroll_x.pack(side='bottom', fill='x')
        scroll_y.pack(side='right', fill='y')

        self.text = tb.Text(self.pdf_frame,
            yscrollcommand=scroll_y.set,
            xscrollcommand=scroll_x.set)
        self.text.pack(side='top', fill='both', expand=True)

        scroll_x.config(command=self.text.xview)
        scroll_y.config(command=self.text.yview)

    #------------------------------------------------------
    def open(self):
        files = [('PDF', '*.pdf'), ('All Files', '*.*')]
        ask_where = filedialog.askopenfile(filetypes=files,
            defaultextension='.pdf')
        self.filename = ask_where.name
        
        self.addImage()

    #------------------------------------------------------
    def save(self):
        files = [('PDF', '*.pdf'), ('All Files', '*.*')]
        ask_where = filedialog.asksaveasfile(filetypes=files,
            defaultextension='.pdf')

        shutil.copy(self.filename, ask_where.name)

    #------------------------------------------------------
    def zoomIn(self):
        self.dpi += 10
        self.addImage()

    #------------------------------------------------------
    def zoomOut(self):
        self.dpi -= 10
        self.addImage()

    #------------------------------------------------------
    def addImage(self):
        self.img_object_li = []

        with fitz.open(self.filename) as open_pdf:
            for page in open_pdf:
                pix = page.get_pixmap(dpi=self.dpi)
                pix1 = fitz.Pixmap(pix,0) if pix.alpha else pix
                img = pix1.tobytes('ppm')
                timg = tb.PhotoImage(data=img)
                self.img_object_li.append(timg)

        # Destroy PDF Viewer and Recreate in order to Zoom
        # There has to be a better way but this is all I
        # could figure out for now
        for widget in self.pdf_frame.winfo_children():
            widget.destroy()
        self.pdfViewer()

        for i in self.img_object_li:
            self.text.image_create('end', image=i)
            self.text.insert('end', '\n\n')
            self.text.configure(state='disabled')

#----------------------------------------------------------

if __name__ == '__main__':
    app = tb.Window(title='Test')

    p = PDFExample(app)

    app.position_center()

    app.mainloop()

Please ask any clarifying questions (I'm not always the best at explaining my code issues unless it's in person).

Thank you for any help!