import Tkinter as tk
from PIL import Image, ImageTk
import glob, os


# image types we're gonna check for
valid_images = [".jpg",".gif",".png",".tga",".jpeg",".bmp",".webm"]

imageList = []

curImg = 0

#find images in directory
for x in valid_images:
    for file in glob.glob("*" + x):
        imageList.append(file)

print(imageList)

print len(imageList)

#This creates the main window of an application
window = tk.Tk()
window.title("Join")

window.configure(background='grey')


path = "sample.png"
img = ImageTk.PhotoImage(Image.open(path))
window.geometry(str(img.width()) + "x" + str(img.height()))
#Creates a Tkinter-compatible photo image, which can be used everywhere Tkinter expects an image object.

#The Label widget is a standard Tkinter widget used to display a text or image on the screen.
panel = tk.Label(window, image = img)

#The Pack geometry manager packs widgets in rows or columns.
panel.pack(side = "bottom", fill = "both", expand = "yes")

def SetImg(newPath):
    global img
    global panel
    global window
    img = ImageTk.PhotoImage(Image.open(newPath))
    panel.configure(image=img)
    window.geometry(str(img.width()) + "x" + str(img.height()))
    window.update()

def ShiftCurImg(amount):
    global curImg
    curImg = (curImg + amount) % (len(imageList))
    print 'Attempting to access image index: ' + str(curImg)
    SetImg(imageList[curImg])

#SetImg(path)

#create keypress event method.
def key(event):
    if event.keysym == 'Left':
        ShiftCurImg(-1)
    elif event.keysym == 'Right':
        ShiftCurImg(1)

#Start the GUI

window.bind_all('<Key>', key)
window.mainloop()