Re: Sequencing images using tkinter?
Okay. Got it now. Your help is much appreciated. Thanks. -- https://mail.python.org/mailman/listinfo/python-list
Re: Sequencing images using tkinter?
theteacher.i...@gmail.com wrote: > How do you exit from this function? > > def next_image(): > myLabel.config(image=random.choice(monster_images)) > # tell tkinter to invoke next_image() again after 200 miliseconds You misunderstand. The problem with the function is not that it doesn't exit, it's just that with > root.after(200, next_image) it schedules itself to be reinvoked by tkinter after 200 seconds. If you want to limit that to 10 times instead of indefinitely you can introduce a counter: n = 10 def next_image(): global n myLabel.config(image=random.choice(monster_images)) n -= 1 if n > 0: root.after(200, next_image) -- https://mail.python.org/mailman/listinfo/python-list
Re: Sequencing images using tkinter?
On Sat, 30 Aug 2014 22:27:01 +0200, wrote: Although getting next_image to run for e.g. 10 times in a for loop is still something I can't get to work. It only displays one image. I think this is because you do all your processing befoe starting the event loop (myGui.mainloop() ). A better way is to bind the function that displays the images to a button callback. Referring to your first post, that could be something like (untested) def rotate(): for i in range(10): myImage = PhotoImage(file="MonsterImages/Converted/" + random.choice(monsters)) myButton1.config(image=myImage, width="100", height="200") sleep(0.2) myButton1=Button(canvas1, text='OK', justify = LEFT, command=rotate) myButton1.place(x=500,y=300) myGui.mainloop() Hope this helps -- Vriendelijke groeten / Kind regards, Albert Visser Using Opera's mail client: http://www.opera.com/mail/ -- https://mail.python.org/mailman/listinfo/python-list
Re: Sequencing images using tkinter?
How do you exit from this function? def next_image(): myLabel.config(image=random.choice(monster_images)) # tell tkinter to invoke next_image() again after 200 miliseconds root.after(200, next_image) -- https://mail.python.org/mailman/listinfo/python-list
Re: Sequencing images using tkinter?
Although getting next_image to run for e.g. 10 times in a for loop is still something I can't get to work. It only displays one image. -- https://mail.python.org/mailman/listinfo/python-list
Re: Sequencing images using tkinter?
Peter - Thanks! I've had a play around and followed your advice and have
something that should take me on to the next step! This is what I have so far
and it works, Thanks.
from tkinter import *
from tkinter import ttk
import random
root = Tk()
root.title("Messing about")
def next_image():
myLabel.config(image=random.choice(monster_images))
# tell tkinter to invoke next_image() again after 200 miliseconds
root.after(200, next_image)
mainframe = ttk.Frame(root, padding="3 3 12 12", width="800", height="600",
borderwidth="120", relief="sunken")
mainframe.grid(column=0, row=0, sticky=(N, W, E, S))
mainframe.columnconfigure(0, weight=1)
mainframe.rowconfigure(0, weight=1)
mon1 = PhotoImage(file="MonsterImages/Converted/py01.gif")
mon2 = PhotoImage(file="MonsterImages/Converted/py02.gif")
mon3 = PhotoImage(file="MonsterImages/Converted/py03.gif")
#A list of object pictures
monster_images = [mon1, mon2, mon3]
#Set up one label
myLabel=ttk.Label(mainframe, image=mon1)
myLabel.grid(column=1, row=1, sticky=W)
next_image()
root.mainloop()
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Re: Sequencing images using tkinter?
theteacher.i...@gmail.com wrote:
> I've started to learn to use tkinter but can't seem to rotate images.
>
> Here is a Python 3.4 program to illustrate the problem. Anyone spot why
> the for loop doesn't seem to want to display a sucssession of images
> please? Thanks.
GUI programs are different from simple scripts; they have to react when the
user resizes the window, clicks on a button, etc. The usual way to do that
is to run an event loop permanently that calls functions that do something
for a relatively small amount of time and then give control back to the
loop.
time.sleep() in contrast stops the whole script (I'm simplifying) and thus
should not be used here. Instead you can use myGui.after() to trigger the
execution of a Python function:
> import sys
> from tkinter import *
> import random
> from time import sleep
>
> myGui = Tk()
> myGui.geometry("1000x800+400+100")
> myGui.title("The Random Machine")
>
> monsters = ["py01.gif", "py02.gif", "py03.gif", "py04.gif", "py05.gif",
> "py06.gif", "py07.gif", "py08.gif",
> "py09.gif", "py10.gif", "py11.gif", "py12.gif", "py13.gif",
> "py14.gif", "py15.gif", "py16.gif", "py17.gif", "py18.gif",
> "py19.gif", "py20.gif",]
>
>
> #Main canvas
> canvas1 = Canvas(myGui, width=1000, height=800, bg="white")
> canvas1.place(x=0,y=0)
# prepare a list of `PhotoImage`s to avoid having to load an image
# more than once
monster_images = [
PhotoImage(file="MonsterImages/Converted/" + monster)
for monster in monsters]
#Main canvas
canvas1 = Canvas(myGui, width=1000, height=800, bg="white")
canvas1.place(x=0,y=0)
#button
myButton1 = Button(canvas1, text='OK', justify=LEFT)
myButton1.config(width="100", height="200")
myButton1.place(x=500, y=300)
def next_image():
myButton1.config(image=random.choice(monster_images))
# tell tkinter to invoke next_image() again after 200 miliseconds
myGui.after(200, next_image)
# invoke next_image() for the first time
next_image()
myGui.mainloop()
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Re: Sequencing images using tkinter?
On 8/30/2014 11:54 AM, theteacher.i...@gmail.com wrote:
I've started to learn to use tkinter but can't seem to rotate images.
Here is a Python 3.4 program to illustrate the problem.
> Anyone spot why the for loop doesn't seem to want to display
> a sucssession of images please? Thanks.
import sys
from tkinter import *
import random
from time import sleep
myGui = Tk()
myGui.geometry("1000x800+400+100")
myGui.title("The Random Machine")
monsters = ["py01.gif", "py02.gif", "py03.gif", "py04.gif", "py05.gif", "py06.gif",
"py07.gif", "py08.gif",
"py09.gif", "py10.gif", "py11.gif", "py12.gif", "py13.gif", "py14.gif",
"py15.gif", "py16.gif",
"py17.gif", "py18.gif", "py19.gif", "py20.gif",]
#Main canvas
canvas1 = Canvas(myGui, width=1000, height=800, bg="white")
canvas1.place(x=0,y=0)
#button
myButton1=Button(canvas1, text='OK', justify = LEFT)
for i in range(10):
myImage = PhotoImage(file="MonsterImages/Converted/" +
random.choice(monsters))
myButton1.config(image=myImage, width="100", height="200")
myButton1.place(x=500,y=300)
sleep(0.2)
myGui.mainloop()
I tried a simplified version of this in the Idle shell. Idle displays
call tips if you pause after typing '('. Unlike .pack and .grid, .place
apparently does not automatically put the widget in its master. At least
this is true when placing in a canvas. You need an 'in_' argument (the
'_' is needed to not be the keyword 'in'). Try
canvas1.pack() #don't use place unless really needed.
...
myButton1.place(in_=canvas1, x=500, y=300)
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Terry Jan Reedy
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