image_viewer.py

from PIL import ImageTk
import PIL.Image
from tkinter import *
from tkinter import filedialog
import os 


class ImageView(object):
	def __init__(self,root):
		self.root = root
		self.root.title("Image-Viewer")
		self.root.geometry('850x530')
		self.root.resizable(0,0)

		# important things ....
		self.i = 0

		# image list 
		self.Image_list = []
		# current path
		self.path ="/home/kaushik/Pictures"
		# possible extensions of images
		self.extension = ['JPG','BMP','PNG']

		# create canvas ...
		self.canvas = Canvas(self.root,bd=5,relief=RIDGE)
		self.canvas.place(x=0,y=0,height=500,width=850)

		# create buttons 

		self.previous_button = Button(self.root,text="<",width=3,font=('arial',10,'bold'),command=self.previous_image)
		self.previous_button.place(x=360,y=500)

		self.next_button = Button(self.root,text=">",width=3,font=('arial',10,'bold'),command=self.next_image)
		self.next_button.place(x=455,y=500)


		self.open_button = Button(self.root,text="Open",width=5,font=('arial',10,'bold'),command=self.open_file)
		self.open_button.place(x=400,y=500)


		self.add_image()

	# open function .....

	def open_file(self):
		self.path = filedialog.askdirectory()
		self.Image_list = []
		self.add_image()


	def add_image(self):
		for image in os.listdir(self.path):
			ext = image.split('.')[::-1][0].upper()
			if ext in self.extension:
				self.Image_list.append(image)

		self.resize(self.Image_list[1])

		# resize function 
	def resize(self,image):
		os.chdir(self.path)
		image_p = self.path + '\\'+str(image)
		img = PIL.Image.open(image)
		#img.show()
		img = img.resize((850,500))
		storeobj = ImageTk.PhotoImage(img)
		self.canvas.delete(self.canvas.find_withtag("bacl"))
		self.canvas.image = storeobj  # <--- keep reference of your image
		self.canvas.create_image(0,0,image=storeobj, anchor=NW)

		#print(self.canvas.find_withtag("bacl"))
		self.root.title("Image Viewer ({})".format(image_p))


	def next_image(self):
		self.i+=1
		try:
			self.image = self.Image_list[self.i]
			self.resize(self.image)
		except:
			pass

	def previous_image(self):
		self.i -=1
		try:
			self.image = self.Image_list[self.i]
			self.resize(self.image)
		except:
			self.i = 1


if __name__ == '__main__':
	root = Tk()
	img = ImageView(root)
	root.mainloop()