Re: problems with tkinter updates
In case somebody else is trying to do the same thing, this is what I ended up with to get the concept, that I can now integrate in other scripts: http://projects.zioup.org/scratchpad/python/tkrun.py -- Yves. http://www.SollerS.ca/ http://ipv6.SollerS.ca http://blog.zioup.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: problems with tkinter updates
On 2012-01-24 02:52, Peter Otten wrote: Have update() (renamed to read_more() in my code) do the reading: import sys import tkinter import tkinter.scrolledtext root = tkinter.Tk() text_window = tkinter.Toplevel() text = tkinter.scrolledtext.ScrolledText(text_window) text.pack() infile = open(sys.argv[1]) def read_more(): line = next(infile, None) if line is not None: text.insert(tkinter.END, line) root.after(100, read_more) else: text.insert(tkinter.END, \nThat's all folks, looney) text.tag_configure(looney, foreground=RED) text.see(tkinter.END) read_more() root.mainloop() Thank you, this was very useful! -- Yves. http://www.SollerS.ca/ http://ipv6.SollerS.ca http://blog.zioup.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: problems with tkinter updates
woooee wrote: [Peter Otten] line = next(infile, None) if line is not None: if line is not None: probably does not work the way you expect. It does what I expect. You might try if line.strip(): Take a look at this quick example test_lines = [Number 1\n, \n, ] for ctr, line in enumerate(test_lines): print ctr, line if line is not None: print not None Modify your example to test_lines = [Number 1\n, \n, ] test_lines = iter(test_lines) while True: ... line = next(test_lines, None) ... if line is None: ... print we're done ... break ... print repr(line) ... 'Number 1\n' '\n' '' we're done and be enlightened ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: problems with tkinter updates
y...@zioup.com wrote:
I'm missing something about tkinter updates. How can I give tkinter a
chance to run?
Here's some code:
import time
import tkinter
import tkinter.scrolledtext
tk = tkinter.Tk()
f = tkinter.Toplevel(tk)
st = tkinter.scrolledtext.ScrolledText(f)
st.pack()
def update():
print('updating')
st.see(tkinter.END)
tk.after(1000, update)
input('hit enter to start')
update()
f = open('/etc/services')
for line in f:
st.insert(tkinter.END, line + '\n')
print('got it')
#time.sleep(5)
input('more?')
input('finished?')
When I do this (input('more?'), it works as expected. If I comment that
line out, then the program reads the entire file, then update the window
right at the end, even if I put a sleep in there. What can I do inside the
loop to give tk a chance?
Have update() (renamed to read_more() in my code) do the reading:
import sys
import tkinter
import tkinter.scrolledtext
root = tkinter.Tk()
text_window = tkinter.Toplevel()
text = tkinter.scrolledtext.ScrolledText(text_window)
text.pack()
infile = open(sys.argv[1])
def read_more():
line = next(infile, None)
if line is not None:
text.insert(tkinter.END, line)
root.after(100, read_more)
else:
text.insert(tkinter.END, \nThat's all folks, looney)
text.tag_configure(looney, foreground=RED)
text.see(tkinter.END)
read_more()
root.mainloop()
--
http://mail.python.org/mailman/listinfo/python-list
Re: problems with tkinter updates
if line is not None: probably does not work the way you expect. You might try if line.strip(): Take a look at this quick example test_lines = [Number 1\n, \n, ] for ctr, line in enumerate(test_lines): print ctr, line if line is not None: print not None -- http://mail.python.org/mailman/listinfo/python-list
problems with tkinter updates
I'm missing something about tkinter updates. How can I give tkinter a chance
to run?
Here's some code:
import time
import tkinter
import tkinter.scrolledtext
tk = tkinter.Tk()
f = tkinter.Toplevel(tk)
st = tkinter.scrolledtext.ScrolledText(f)
st.pack()
def update():
print('updating')
st.see(tkinter.END)
tk.after(1000, update)
input('hit enter to start')
update()
f = open('/etc/services')
for line in f:
st.insert(tkinter.END, line + '\n')
print('got it')
#time.sleep(5)
input('more?')
input('finished?')
When I do this (input('more?'), it works as expected. If I comment that line
out, then the program reads the entire file, then update the window right at
the end, even if I put a sleep in there. What can I do inside the loop to give
tk a chance?
Thanks.
--
Yves. http://www.SollerS.ca/
http://ipv6.SollerS.ca
http://blog.zioup.org/
--
http://mail.python.org/mailman/listinfo/python-list
Re: problems with tkinter updates
On 01/23/2012 08:09 PM, y...@zioup.com wrote:
I'm missing something about tkinter updates. How can I give tkinter a
chance to run?
Here's some code:
import time
import tkinter
import tkinter.scrolledtext
tk = tkinter.Tk()
f = tkinter.Toplevel(tk)
st = tkinter.scrolledtext.ScrolledText(f)
st.pack()
def update():
print('updating')
st.see(tkinter.END)
tk.after(1000, update)
input('hit enter to start')
update()
f = open('/etc/services')
for line in f:
st.insert(tkinter.END, line + '\n')
print('got it')
#time.sleep(5)
input('more?')
input('finished?')
When I do this (input('more?'), it works as expected. If I comment
that line out, then the program reads the entire file, then update the
window right at the end, even if I put a sleep in there. What can I do
inside the loop to give tk a chance?
You have it backward. The question is not what you do inside your loop
to give tk a chance, but rather what do you do to make tk give you a
chance. tk doesn't start till you make the mainloop() method call,
and once you call that method, it won't return till the program is exiting.
So, forget about input statements inside some loop. Input isn't a gui
concept, it's for console apps. Gui apps use dialog boxes and such.
Similarly sleep(). mainloop() will sleep, when there are no events in
its queue. If you want to do work, break it into manageable chunks, and
attach each chunk to some event that tk will fire.
Beyond that, I cannot help, for I don't know tkinter. But all gui's are
similar at this level of detail.
--
DaveA
--
http://mail.python.org/mailman/listinfo/python-list
Re: problems with tkinter updates
On 2012-01-23 20:57, Dave Angel wrote: You have it backward. The question is not what you do inside your loop to give tk a chance, but rather what do you do to make tk give you a chance. tk doesn't start till you make the mainloop() method call, and once you call that method, it won't return till the program is exiting. So, forget about input statements inside some loop. Input isn't a gui concept, it's for console apps. Gui apps use dialog boxes and such. Similarly sleep(). mainloop() will sleep, when there are no events in its queue. If you want to do work, break it into manageable chunks, and attach each chunk to some event that tk will fire. The input statements were there for debugging purpose... I now have got it running without any sleep or input, I simply added a tk.update() in the loop. It works for updating the window, but when I add buttons to that frame, they are quite unresponsive. I'm starting to think I need to split off the reading part into a different thread. -- Yves. http://www.SollerS.ca/ http://ipv6.SollerS.ca http://blog.zioup.org/ -- http://mail.python.org/mailman/listinfo/python-list
