Tkinter program displays blank screen on linux, works on windows - python-3.x

Question

I've been writing this code for a slideshow program in Linux. The problem I'm having is that when run from a windows environment it works perfectly (Full-screen resized images), however when run from a virtual Linux (Ubuntu x64) environment a blank white canvas appears with no images being displayed.
The code:
from PIL import Image, ImageTk
import tkinter as tk
import os
import glob
import random
class App(tk.Tk):
def __init__(self, image_files, delay):
tk.Tk.__init__(self)
self.w = self.winfo_screenwidth()
self.h = self.winfo_screenheight()
self.overrideredirect(1)
self.geometry("%dx%d+0+0" % (self.w, self.h))
self.delay = delay
self.pictures = []
self.track_img_ndex = 0
for img in image_files:
self.pictures.append(img)
self.picture_display = tk.Label(self)
self.picture_display.pack(expand=True, fill="both")
def show_slides(self):
if self.track_img_ndex < len(self.pictures):
x = self.pictures[self.track_img_ndex]
self.track_img_ndex +=1
original_image = Image.open(x)
resized = original_image.resize((self.w, self.h),Image.ANTIALIAS)
new_img = ImageTk.PhotoImage(resized)
self.picture_display.config(image=new_img)
self.picture_display.image = new_img
self.title(os.path.basename(x))
self.after(self.delay, self.show_slides)
else:
print("End of list!")
delay = 5000
playlist = glob.glob(r'\mnt\hgfs\E\Images\*.*')
random.shuffle(playlist)
image_files = playlist
app = App(image_files, delay)
app.show_slides()
app.mainloop()
Any help would be appreciated!

Answer 1

winfo_screenwidth() and winfo_screenheight() give not correct display size on Linux. Use full-screen mode to fix it.
The code:
from PIL import Image, ImageTk
import tkinter as tk
import os
import glob
import random
class App(tk.Tk):
def __init__(self, image_files, delay):
tk.Tk.__init__(self)
# start window size (any)
self.w = 500
self.h = 500
self.attributes("-fullscreen", True) # Activate full-screen mode
# Change full-screen mode bind
self.bind("<F11>", lambda event: self.attributes("-fullscreen",
not self.attributes("-fullscreen")))
# Bind full-screen mode exit
self.bind("<Escape>", lambda event: self.attributes("-fullscreen", False))
self.geometry("%dx%d+100+100" % (self.w, self.h))
self.delay = delay
self.pictures = []
self.track_img_ndex = 0
for img in image_files:
self.pictures.append(img)
self.picture_display = tk.Label(self)
self.picture_display.pack(expand=True, fill="both")
def show_slides(self):
if self.track_img_ndex < len(self.pictures):
x = self.pictures[self.track_img_ndex]
self.track_img_ndex += 1
original_image = Image.open(x)
window_size_now = (self.winfo_width(), self.winfo_height()) # Getting current window size :
resized = original_image.resize(window_size_now, Image.ANTIALIAS)
new_img = ImageTk.PhotoImage(resized)
self.picture_display.config(image=new_img)
self.picture_display.image = new_img
self.title(os.path.basename(x))
self.after(self.delay, self.show_slides)
else:
print("End of list!")
_delay = 5000
playlist = glob.glob(r'/home/yaroslav_admin/PycharmProjects/LearnPython_01/imgs/*.*')
random.shuffle(playlist)
_image_files = playlist
app = App(_image_files, _delay)
app.after(100, app.show_slides) # delayed start,
# because tkinter need some time to count full-screen window size in main loop !
app.mainloop()