slideShow.py

'''
Python 3 slideshow using tkinter and pillow (PIL)
Usage: python3 slideShow.py [img_directory]
'''

import tkinter as tk
from PIL import Image, ImageTk
import time
import sys
import os

class HiddenRoot(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        #hackish way, essentially makes root window
        #as small as possible but still "focused"
        #enabling us to use the binding on <esc>
        self.wm_geometry("0x0+0+0")

        self.window = MySlideShow(self)
        self.window.startSlideShow()


class MySlideShow(tk.Toplevel):
    def __init__(self, *args, **kwargs):
        tk.Toplevel.__init__(self, *args, **kwargs)
        #remove window decorations 
        self.overrideredirect(True)

        #save reference to photo so that garbage collection
        #does not clear image variable in show_image()
        self.persistent_image = None
        self.imageList = []
        self.pixNum = 0

        #used to display as background image
        self.label = tk.Label(self)
        self.label.pack(side="top", fill="both", expand=True)

        self.getImages()

    def getImages(self):
        '''
        Get image directory from command line or use current directory
        '''
        if len(sys.argv) == 2:
            curr_dir = sys.argv[1]
        else:
            curr_dir = '.'

        for root, dirs, files in os.walk(curr_dir):
            for f in files:
                if f.endswith(".png") or f.endswith(".jpg"):
                    img_path = os.path.join(root, f)
                    print(img_path)
                    self.imageList.append(img_path)

    def startSlideShow(self, delay=4): #delay in seconds
        myimage = self.imageList[self.pixNum]
        self.pixNum = (self.pixNum + 1) % len(self.imageList)
        self.showImage(myimage)
        #its like a callback function after n seconds (cycle through pics)
        self.after(delay*1000, self.startSlideShow)

    def showImage(self, filename):
        image = Image.open(filename)  

        img_w, img_h = image.size
        scr_w, scr_h = self.winfo_screenwidth(), self.winfo_screenheight()
        width, height = min(scr_w, img_w), min(scr_h, img_h)
        image.thumbnail((width, height), Image.ANTIALIAS)

        #set window size after scaling the original image up/down to fit screen
        #removes the border on the image
        scaled_w, scaled_h = image.size
        self.wm_geometry("{}x{}+{}+{}".format(scaled_w,scaled_h,0,0))
        
        # create new image 
        self.persistent_image = ImageTk.PhotoImage(image)
        self.label.configure(image=self.persistent_image)


slideShow = HiddenRoot()
slideShow.bind("<Escape>", lambda e: slideShow.destroy())  # exit on esc
slideShow.mainloop()

Nice routine.
I've modded it to process time-lapse images.
Thanks for the code.

Hello I am searching the form to create slider with transition but ... Not works. Any sugestion why not change the image inside the while. reggards

while 1.0 > alpha:
				
				fini = (Image.blend(old_resized,resized,alpha)).convert("RGB") 
				im2 = Image.new('RGB',old_resized.size)
				alpha = alpha + 0.1
				self.picture_display.configure(text="%i s" % alpha)
				new_img = ImageTk.PhotoImage(fini)
				self.picture_display.configure(image=new_img)
				self.picture_display.image = new_img
				
				self.title(os.path.basename(x))
				
			self.after(self.delay, self.show_slides)

So simple!
thank you ♥

Hello! Appreciate this is 6 years old but could anyone help a newbie? I have Python 3.9.1 on MacOS Catalina but when I run this neat script I just get a list of files in the shell window, not opened in a picture viewer. Any ideas? I think I have installed PIL and Tkinter correctly ...

@ken-techno same thing happened with me, check with below code to confirm if you there is anything wrong with your machine or code. This worked for me.

import tkinter as tk
from tkinter import *
from PIL import Image
from PIL import ImageTk
import os

root = tk.Tk()
root.geometry("800x800")

l = Label()
l.pack()
img_fp = ImageTk.PhotoImage(Image.open('IMAGE_PATH'))
l.config(image=img_fp)
root.mainloop()

It is great. Thanks a lot!