Change Background Tkinter in Classes - python-3.x

Question

I'm relatively new to Tkinter and Python and just started with Tkinter in object oriented way.
Im trying to change the background colour of all the different pages I have so i have the following code
import tkinter as tk
import sqlite3
from tkinter.ttk import *
from tkinter import *
LARGE_FONT = ("Verdana", 12)
HEIGHT = 700
WIDTH = 800
class programStart(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1, minsize=WIDTH)
container.grid_columnconfigure(0, weight=1, minsize=HEIGHT)
self.frames = {}
for F in (StartPage, Register, LoginPage):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise() #Raises to front
class StartPage(tk.Frame):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
I have tried container.configure(bg='red') and so on, to no success
How can I go about this issue?

Answer 1

Try this:
import tkinter as tk
import sqlite3
from tkinter.ttk import *
from tkinter import *
LARGE_FONT = ("Verdana", 12)
HEIGHT = 700
WIDTH = 800
class programStart(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1, minsize=WIDTH)
container.grid_columnconfigure(0, weight=1, minsize=HEIGHT) #0 minimum, weight is priority
self.frames = {}
for F in (StartPage, Register, LoginPage):
frame = F(container, self, bg="red")
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise() #Raises to front
class StartPage(tk.Frame):
def __init__(self, parent, controller, bg=None, fg=None):
tk.Frame.__init__(self, parent, bg=bg=, fg=fg)
# Make sure that all of the tkinter widgets have `bg=bg=, fg=fg`
Basically you need to tell all of the widgets that you are creating that the background should be red. When creating your widgets you can pass in the bg parameter (background).

Answer 2

This is a minimal version of the system I use to give the user of the GUI the ability to change the colors and fonts of all the widgets in the app according to color schemes he can choose himself.
import tkinter as tk
formats = {
'bg' : 'black',
'fg' : 'white'
}
class Labelx(tk.Label):
def __init__(self, master, *args, **kwargs):
tk.Label.__init__(self, master, *args, **kwargs)
def winfo_subclass(self):
''' a method that works like built-in tkinter method
w.winfo_class() except it gets subclass names
of widget classes custom-made by inheritance '''
subclass = type(self).__name__
return subclass
class Label(Labelx):
'''
If this subclass is detected it will be reconfigured
according to user preferences.
'''
def __init__(self, master, *args, **kwargs):
Labelx.__init__(self, master, *args, **kwargs)
self.config(
bg=formats['bg'],
fg=formats['fg'])
class LabelNegative(Labelx):
'''
If this subclass is detected it will be reconfigured
according to user preferences.
'''
def __init__(self, master, *args, **kwargs):
Labelx.__init__(self, master, *args, **kwargs)
self.config(
bg=formats['fg'],
fg=formats['bg'])
def change_colors():
for widg in (lab1, lab2):
if widg.winfo_class() == 'Label':
if widg.winfo_subclass() == 'Label':
widg.config(bg=formats['fg'], fg=formats['bg'])
elif widg.winfo_subclass() == 'LabelNegative':
widg.config(bg=formats['bg'], fg=formats['fg'])
root = tk.Tk()
f1 = tk.Frame(root)
f1.grid(column=0, row=0)
lab1 = Label(f1, text='Label')
lab1.grid()
lab2 = LabelNegative(f1, text='LabelNegative')
lab2.grid()
button = tk.Button(root, text='colorize', command=change_colors)
button.grid()
root.mainloop()