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+--- Thread: Not understanding the correlation between code and geometry with Tkninter (/thread-11976.html)
Not understanding the correlation between code and geometry with Tkninter - Intelligent_Agent0 - Aug-03-2018
Hello, I recently started working on a personal app to help me learn GUI programming with python Tkinter. What I am having trouble with is coding the geometry, I learned how to make buttons and labels, but when I run my program I have no control over where they will be displayed within the screen. Here is an example program I wrote, It is to become an online shopping app:
from tkinter import * root = Tk() BeveragesButton = Button(master = root, bg = "white", fg = "green", text = "Beverages") Meat_SeafoodButton = Button(master = root, bg = "white", fg = "green", text = "Meat & Seafood") BakeryButton = Button(master = root, bg = "white", fg = "green", text = "Bakery") PantryButton = Button(master = root, bg = "white", fg = "green", text = "Pantry") Snacks_SweetsButton = Button(master = root, bg = "white", fg = "green", text = "Snacks & Sweets") Dairy_EggsButton = Button(master = root, bg = "white", fg = "green", text = " Dairy & Eggs") Frozen_Foods = Button(master = root, bg = "white", fg = "green", text = "Frozen Foods") ButtonsList1 = [BeveragesButton,Meat_SeafoodButton,BakeryButton,PantryButton,Snacks_SweetsButton,Dairy_EggsButton,Frozen_Foods] listbox = Listbox(root) listbox.pack(fill = BOTH,expand = 1) for button in ButtonsList1: listbox.insert(END) button.pack() mainloop()This is a image of the window python produces from the code:
NOTE: I thought I could show you a picture but I guess this forum doesn't support that.
Anyhow, the problem is, when I run the code, the buttons appear in the bottom center under a large white space. I want the buttons lined up from top to bottom on left side of screen. What can I do to fix my geometry problems?
RE: Not understanding the correlation between code and geometry with Tkninter - Larz60+ - Aug-03-2018
Quote:What I am having trouble with is coding the geometry,tkinters geometry is the main reason I stopped using it, and switched to wxpython phoenix (for python 3+),
pack is ok for very simple applications. It quickly becomes unruly when you have more than a few frames.
In my opinion, You don't really have a chance without using grid.
Tkinter's resizing is possible using weight, but still a pain to get right.
The best write-up I have found on this is: http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/root-resize.html
This document is the best I have found for tkinter.
Just an FYI, wxpython's geometry is a snap, including dockable windows, etc. It might be worth taking a look at.
Here's a sample widget page: https://wxpython.org/Phoenix/docs/html/gallery.html
RE: Not understanding the correlation between code and geometry with Tkninter - Grytpype - Aug-03-2018
The large white space is your listbox. It contains seven empty lines, one for each time you went round the loop. Listboxes contain text: listbox.insert(END, "hyena"). It looks as if you want to insert the buttons in the listbox. But the loop alternately adds an empty line to the listbox and packs a button below it.
I agree that grid() gives you much better control than pack().
RE: Not understanding the correlation between code and geometry with Tkninter - Axel_Erfurt - Aug-04-2018
Buttons left
for button in ButtonsList1:
listbox.insert(END)
button.pack(anchor = 'w')