tkinter Text Widget duplicating when progress bar displayed - text

Question

I have an app that displays progress messages via a Text widget, so that it will scroll if there are many lines. It also displays a 'Task' Progress Bar for each individual step, and a different 'Total' Progress Bar for the total completion.
My situation is that I want to have the progress bars not displayed if they have no 'content'. So neither of them at the start and end of the processing. The 'Total' progress bar would display once the first step is complete, and the 'Task' progress bar would be displayed if the task is long enough to warrant it.
It's a big app but here is a shortened version of what I have (still long though).
#!/usr/bin/python
# coding=utf-8
# Try to work with older version of Python
from __future__ import print_function
import sys
if sys.version_info.major < 3:
import Tkinter as tk
import Tkinter.ttk as ttk
else:
import tkinter as tk
import tkinter.ttk as ttk
#============================================================================
# MAIN CLASS
class Main(tk.Frame):
""" Main processing
"""
def __init__(self, root, *args, **kwargs):
tk.Frame.__init__(self, root, *args, **kwargs)
self.root = root
self.MW_f = tk.Frame(self.root)
# Progress Messages
self.PM_prog_msgs_lf_var = tk.StringVar()
self.PM_prog_msgs_lf = tk.LabelFrame(self.MW_f,
text=' Progress Messages: ',
relief='sunken')
# Progress Message text widget
self.PM_prog_msgs_max_frame_height = 6
self.PM_prog_msgs_line_count = 0
self.PM_prog_msgs_t = tk.Text(self.PM_prog_msgs_lf, height=self.PM_prog_msgs_max_frame_height, width=100)
self.PM_prog_msgs_t_vbar = ttk.Scrollbar(self.PM_prog_msgs_lf,
orient='vertical', command=self.PM_prog_msgs_t.yview)
self.PM_prog_msgs_t['yscrollcommand'] = self.PM_prog_msgs_t_vbar.set
self.PM_prog_msgs_t['state'] = 'disabled'
self.PM_prog_msgs_t['border'] = 3
self.PM_task_progbar_var = tk.IntVar()
self.PM_task_progbar = ttk.Progressbar(self.MW_f,
orient='horizontal',
mode='indeterminate',
variable=self.PM_task_progbar_var)
self.PM_progbar_var = tk.IntVar()
self.PM_progbar = ttk.Progressbar(self.MW_f,
orient='horizontal',
mode='determinate',
variable=self.PM_progbar_var,
maximum=4)
self.PM_go_btn = tk.Button(self.MW_f,
text='Go',
command=self.action_go_btn)
self.MW_stsbar_tvar = tk.StringVar()
self.MW_stsbar = tk.Label(self.MW_f,
textvariable=self.MW_stsbar_tvar)
# Grid the widgets
self.MW_f.grid()
MW_grid_row = 0
# Place into MW_f
self.PM_prog_msgs_lf.grid(row=MW_grid_row, column=0, sticky='we')
# Place into PM_prog_msgs_lf
self.PM_prog_msgs_t.grid(row=0, column=0)
self.PM_prog_msgs_t_vbar.grid(row=0, column=1, sticky='ns')
MW_grid_row += 1
self.PM_task_progbar_row = MW_grid_row
self.PM_task_progbar.grid(row=self.PM_task_progbar_row, sticky='we')
MW_grid_row += 1
self.PM_progbar_row = MW_grid_row
self.PM_progbar.grid(row=self.PM_progbar_row, sticky='we')
MW_grid_row += 1
self.MW_stsbar.grid(row=MW_grid_row, sticky='w')
MW_grid_row += 1
self.PM_go_btn.grid(row=MW_grid_row)
# Remove these until needed
self.PM_task_progbar.grid_remove()
self.PM_progbar.grid_remove()
self.PM_prog_msgs_t_vbar.grid_remove()
self.MW_dsp_stsbar_msg('Processing: Refer to progress message pane for more details')
# Window Displays Now
#=========================================================================================
# Functions used by window
def action_go_btn(self):
"""
"""
msg = 'Line 1\nLine 2'
self.PM_dsp_prog_msgs(msg, 2)
self.PM_task_progbar_update()
time.sleep(5)
self.PM_progbar_update()
self.PM_dsp_prog_msgs('Line 3', 1)
self.PM_task_progbar_update()
time.sleep(5)
self.PM_progbar_update()
msg = 'Line 4\nLine 5\nLine 6'
self.PM_dsp_prog_msgs(msg, 3)
self.PM_task_progbar_update()
time.sleep(5)
self.PM_progbar_update()
msg = 'Line 7\nLine 8\nLine 9'
self.PM_dsp_prog_msgs(msg, 3)
self.PM_task_progbar_update()
time.sleep(5)
self.PM_progbar_update()
self.PM_progbar.grid_remove()
return
def MW_dsp_stsbar_msg(self, msg):
"""
"""
# Display the statusbar
self.MW_stsbar_tvar.set(msg)
return
def PM_dsp_prog_msgs(self, msg, lines):
"""
"""
# Populate the message
self.PM_prog_msgs_t['state'] = 'normal'
self.PM_prog_msgs_t.insert(tk.END, ('\n'+msg))
self.PM_prog_msgs_t['state'] = 'disabled'
self.root.update_idletasks()
self.PM_prog_msgs_line_count += lines
# If its time display the vert scroll bar
if not self.PM_prog_msgs_t_vbar.winfo_viewable():
if self.PM_prog_msgs_line_count > self.PM_prog_msgs_max_frame_height:
self.PM_prog_msgs_t_vbar.grid(row=0, column=1)
self.root.update_idletasks()
# Show the last line.
self.PM_prog_msgs_t.see(tk.END)
self.root.update_idletasks()
return
def PM_progbar_update(self):
"""
"""
if not self.PM_progbar.winfo_viewable():
self.PM_progbar.grid()
# Remove the task progbar
self.PM_task_progbar.stop()
self.PM_task_progbar.grid_remove()
# Increment the progbar
self.PM_progbar.step()
self.root.update_idletasks()
return
def PM_task_progbar_update(self):
"""
"""
# Display if not already displayed
if not self.PM_task_progbar.winfo_viewable():
self.PM_task_progbar.grid()
self.root.update_idletasks()
# Step
self.PM_task_progbar.start()
self.root.update_idletasks()
return
# MAIN (MAIN) ===========================================================================
def main():
""" Run the app
"""
# # Create the screen instance and name it
root = tk.Tk()
app = Main(root)
root.mainloop()
root.quit()
# MAIN (STARTUP) ====================================================
# This next line runs the app as a standalone app
if __name__ == '__main__':
# Run the function name main()
main()
What happens is when the 'Task' progress bar is displayed the 'Progress Messages' label frame is duplicated, and moved down one line (see the screen shot)
Sorry, I cannot attach the screen shot. This is a text version of the screenshot!
Progress Messages ---------------------------------------
Progress Messages ---------------------------------------
Message Step 1
[Task Progress Bar ]
[Total Progress Bar ]
The display remains this way until the end. Even when the 'Task' progress bar is removed the duplication remains. The display does not add a third version when the 'Total' progress bar is displayed though.
Everything corrects itself at the end when both progress bars are removed.
All the widgets are gridded to the correct frame and the row/column seems to be correct, so where do I look to correct this.
Many thanks, and sorry this is all so long.
MacBookPro (2007), python 3.4, tkinter 8.5