Collapsible Pane in Tkinter | Python

# Implementation of Collapsible Pane container # importing tkinter and ttk modules import tkinter as tk from tkinter import ttk class CollapsiblePane(ttk.Frame):  """  -----USAGE-----  collapsiblePane = CollapsiblePane(parent,   expanded_text =[string],  collapsed_text =[string])  collapsiblePane.pack()  button = Button(collapsiblePane.frame).pack()  """ def __init__(self, parent, expanded_text ="Collapse <<", collapsed_text ="Expand >>"): ttk.Frame.__init__(self, parent) # These are the class variable # see a underscore in expanded_text and _collapsed_text # this means these are private to class self.parent = parent self._expanded_text = expanded_text self._collapsed_text = collapsed_text # Here weight implies that it can grow it's # size if extra space is available # default weight is 0 self.columnconfigure(1, weight = 1) # Tkinter variable storing integer value self._variable = tk.IntVar() # Checkbutton is created but will behave as Button # cause in style, Button is passed # main reason to do this is Button do not support # variable option but checkbutton do self._button = ttk.Checkbutton(self, variable = self._variable, command = self._activate, style ="TButton") self._button.grid(row = 0, column = 0) # This will create a separator # A separator is a line, we can also set thickness self._separator = ttk.Separator(self, orient ="horizontal") self._separator.grid(row = 0, column = 1, sticky ="we") self.frame = ttk.Frame(self) # This will call activate function of class self._activate() def _activate(self): if not self._variable.get(): # As soon as button is pressed it removes this widget # but is not destroyed means can be displayed again self.frame.grid_forget() # This will change the text of the checkbutton self._button.configure(text = self._collapsed_text) elif self._variable.get(): # increasing the frame area so new widgets # could reside in this container self.frame.grid(row = 1, column = 0, columnspan = 2) self._button.configure(text = self._expanded_text) def toggle(self):  """Switches the label frame to the opposite state.""" self._variable.set(not self._variable.get()) self._activate() 

# Importing tkinter and ttk modules from tkinter import * from tkinter.ttk import * # Importing Collapsible Pane class that we have # created in separate file from collapsiblepane import CollapsiblePane as cp # Making root window or parent window root = Tk() root.geometry('200x200') # Creating Object of Collapsible Pane Container # If we do not pass these strings in # parameter the default strings will appear # on button that were, expand >>, collapse << cpane = cp(root, 'Expanded', 'Collapsed') cpane.grid(row = 0, column = 0) # Button and checkbutton, these will # appear in collapsible pane container b1 = Button(cpane.frame, text ="GFG").grid( row = 1, column = 2, pady = 10) cb1 = Checkbutton(cpane.frame, text ="GFG").grid( row = 2, column = 3, pady = 10) mainloop()