Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #51072 > unrolled thread

tkinter progress bar

Back to article view | Back to comp.lang.python

Contents

  tkinter progress bar hsiwrek@walla.com - 2013-07-22 23:52 -0700
    Re: tkinter progress bar Christian Gollwitzer <auriocus@gmx.de> - 2013-07-23 10:43 +0200
      Re: tkinter progress bar hsiwrek@walla.com - 2013-07-23 02:38 -0700
        Re: tkinter progress bar Jason Swails <jason.swails@gmail.com> - 2013-07-23 09:27 -0400

#51072 — tkinter progress bar

Hi, 
	
How can I add a tkinter progress bar in python 3.2 to start before a loop and end after it. I am looking for a very simple solution. 

def MyFunc():
Start progress bar    

for fileName in fileList:
…

End progress bar    


Thanks a lot in advance.

[toc] | [next] | [standalone]

#51075

Am 23.07.13 08:52, schrieb hsiwrek@walla.com:
> Hi,
> 	
> How can I add a tkinter progress bar in python 3.2 to start before a loop and end after it. I am looking for a very simple solution.
>
> def MyFunc():
> Start progress bar
>
> for fileName in fileList:
> …
>
> End progress bar
>

1. There is a progress bar widget in ttk. At the beginning, you set 
maximum to the number of files in your list

2. In the loop, you set "value" of the progressbar to the current file 
number. You can also attach a variable

3. The bar is only redrawn when you process events. The simplest way to 
do this is by calling update() on the progress bar, which processes all 
pending events. Despite of it looking like a method, update() is really 
a global function within Tcl and updates all widgets in your interface. 
You must make sure, therefore, that the user does not trigger another 
event which interferes with your download, such as pressing the button 
for starting it again. The easiest way is to disable the button at the 
begin and reenable it at the end.

4. If processing of a single file takes a long time, the only way to 
have the GUI responsive is to put the work in a background thread. That 
seems to be more involved.

	Christian

[toc] | [prev] | [next] | [standalone]

#51078

Dear Christian,

Thanks for the help. Can you please add a source example as I am new with Tkinter.

Cheers.

[toc] | [prev] | [next] | [standalone]

#51088

[Multipart message — attachments visible in raw view] — view raw

On Tue, Jul 23, 2013 at 5:38 AM, <hsiwrek@walla.com> wrote:

> Dear Christian,
>
> Thanks for the help. Can you please add a source example as I am new with
> Tkinter.
>

 http://docs.python.org/2/library/ttk.html#progressbar

You can do something like this:

#!/usr/bin/env python

import Tkinter as tk
import ttk
import time

class MainApp(tk.Frame):

   def __init__(self, master):
      tk.Frame.__init__(self, master)
      self.progress = ttk.Progressbar(self, maximum=10)
      self.progress.pack(expand=1, fill=tk.BOTH)
      self.progress.bind("<Button-1>", self._loop_progress)

   def _loop_progress(self, *args):
      for i in range(10):
         self.progress.step(1)
         # Necessary to update the progress bar appearance
         self.update()
         # Busy-wait
         time.sleep(2)


if __name__ == '__main__':
   root = tk.Tk()
   app = MainApp(root)
   app.pack(expand=1, fill=tk.BOTH)
   root.mainloop()


This is a simple stand-alone app that (just) demonstrates how to use the
ttk.Progressbar widget.

HTH,
Jason

[toc] | [prev] | [standalone]

Back to top | Article view | comp.lang.python

csiph-web