pil example fast-tk (snippet)

Python pil example 'fast-tk'

Functions in program:

def main():

Modules used in program:

import fastpic
import time
import tkinter

python fast-tk

Python pil example: fast-tk

# use a Tkinter label as a panel/frame with a background image
# note that Tkinter only reads gif and ppm images
# use the Python Image Library (PIL) for other image formats
# free from [url]http://www.pythonware.com/products/pil/index.htm[/url]
# give Tkinter a namespace to avoid conflicts with PIL
# (they both have a class named Image)

import tkinter
from PIL import Image, ImageTk
import time
import fastpic

class GeneratedPngDisplay(object):
    def __init__(self):
        self.root = tkinter.Tk()
        self.root.title('Generated Image Display')

        # get the image size
        w = 200
        h = 200

        # position coordinates of root 'upper left corner'
        x = 0
        y = 0

        # make the root window the size of the image
        self.root.geometry("%dx%d+%d+%d" % (w, h, x, y))

        self.iteration = 0
        png = fastpic.generate(fastpic.RED, fastpic.BLACK)
        img = ImageTk.PhotoImage(png)

        # root has no image argument, so use a label as a panel
        self.panel = tkinter.Label(self.root, image=img)
        self.panel.pack(side=tkinter.TOP, fill=tkinter.BOTH, expand=tkinter.YES)

        self.root.after(1000, self.update_image)
        self.root.mainloop()

    def update_image(self):
        print("Iteration", self.iteration)
        if self.iteration % 2 == 0:
            png = fastpic.generate(fastpic.RED, fastpic.WHITE)
            img = ImageTk.PhotoImage(png)
            self.panel.configure(image=img)
            self.panel.image = img
        else:
            png = fastpic.generate(fastpic.WHITE, fastpic.BLACK)
            img = ImageTk.PhotoImage(png)
            self.panel.configure(image=img)
            self.panel.image = img

        self.iteration += 1
        self.root.after(1000, self.update_image)

def main():
    app = GeneratedPngDisplay()

if __name__ == '__main__':
    main()

Python links

Learn Python: https://pythonbasics.org/
Python Tutorial: https://pythonprogramminglanguage.com