Chris Hare wrote:
> The scenario is this:
>
> I want to loop around all of the images in a given directory (which I know
> will be images, but I guess I should check), show an image in a window,
> wait 2 seconds and show the next one and repeat that indefinitley, which
> will be until the user closes the window.
>
> This is the code I extracted from the larger program and made work - sort
> of - in a standalone fashion. When I run the code, each of the file names
> gets displayed, and I can view the images, so it has to be something I am
> doing wrong with this chunk of code.
>
> However, I don't see what the problem is.
I have not looked at your code in detail, but event loops and time.sleep()
don't play together very well. Use after(delay_in_milliseconds, callable)
instead.
Here's a simple example that loops over images passed from the command line:
import Image
import ImageTk
import os
import sys
import Tkinter as tk
from itertools import cycle
def next_image():
imagefile = next(imagefiles)
image = Image.open(imagefile)
w, h = image.size
image = image.resize((700, 700*h//w))
label.image = label["image"] = ImageTk.PhotoImage(image=image)
root.title("Now showing %s" % os.path.basename(imagefile))
root.after(2000, next_image)
if __name__ == "__main__":
imagefiles = sys.argv[1:]
assert imagefiles
imagefiles = cycle(imagefiles)
root = tk.Tk()
label = tk.Label(root)
label.pack()
root.after_idle(next_image)
root.mainloop()
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