Tkinter: How can I update an image display?
carroll at nospam-tjc.com
Mon Jun 6 05:39:04 CEST 2005
I've got a small batch image-processing program (it adds the time a
digital photo was taken to the lower right of the image), and as a
feature, I wanted to show a thumbnail of each image it was being
processed. I can't get the image to update, though.
I trimmed it down to a basic app indicating the problem and the code
is at the end of this message. It should display the three listed
sample images, one after another.
The thing is, if I uncomment the raw_input call, it works. But I
don't want to have to hit ENTER after each image.
At first I wondered whether maybe the image data was bad, but that
doesn't explain why it works fine with the raw_input call in place.
I've hardly played with Tkinter, so I'm probably missing something
obvious. I tried adding pack() calls for F2 and ImageLabel, and that
made no difference.
Here's the code:
import Tkinter as Tk
import os, sys, time
import Image, ImageTk
def __init__(self, root):
"""initializer for Tkinter-based application"""
F1 = Tk.Frame(self.root)
SelButton = Tk.Button(F1, text="Go", command=self.go)
QuitButton = Tk.Button(F1, text="Quit", command=F1.quit)
F2 = Tk.Frame(self.root)
self.ImageLabel = Tk.Label(F2)
self.FilenameLabel = Tk.Label(F2)
filenames = ["DSCN0184.JPG", "DSCN0185.JPG", "DSCN0186.JPG"]
for name in filenames:
Tkimage = ImageTk.PhotoImage(im)
raw_input("Press ENTER for next...")
root = Tk.Tk()
myapp = MyApp(root)
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