Python Tkinter PanedWindow widget part2

 The PanedWindow widget Methods in tkinter

In this lesson, we covered the basics of PanedWindow in Tkinter, including its syntax, options, and methods. We explored how to create a PanedWindow widget and add panes to it, as well as how to adjust the size and position of panes and the divider between them.

We also discussed some common uses for PanedWindow in Tkinter, such as creating resizable interfaces and building multi-pane applications. Finally, we included some multiple-choice questions and answers to help reinforce the concepts covered in this lesson.

There are several methods associated with the PanedWindow widget in Tkinter.

add:

Adds a pane to the PanedWindow.

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)

In this example, two panes are added to the PanedWindow using the add method.

forget:

Removes a pane from the PanedWindow.

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.forget(pane1)

In this example, two panes are added to the PanedWindow using the add method, and then the first pane is removed using the forget method.

Note that the forget method removes the pane from the PanedWindow, but does not destroy the widget itself. If you want to completely remove the widget from the application, you should call the destroy method on the widget.

How to remove a pane and destroy the widget ?

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.forget(pane1)
pane1.destroy()

root.mainloop()

This creates a horizontal PanedWindow with two panes, removes the first pane using the forget method, and then destroys the widget using the destroy method.

another example

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.forget(pane2)

In this example, two panes are added to the PanedWindow, and then the second pane is removed using the forget method.

forget method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Remove pane 2 from the PanedWindow
paned_window.forget(pane2)

root.mainloop()

In this example, two panes are added to the PanedWindow, and then the forget method is called to remove the second pane from the PanedWindow.

sash_coord:

Returns the current position of the sash (the divider between the panes) in pixels.

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
sash_pos = paned_window.sash_coord(0)

In this example, two panes are added to the PanedWindow, and then the position of the sash is retrieved using the sash_coord method.

sash_place:

Sets the position of the sash to the specified pixel position.

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.sash_place(0, 200)

In this example, two panes are added to the PanedWindow, and then the position of the sash is set to 200 pixels using the sash_place method.

sash_position method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=VERTICAL)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Set the sash position of the PanedWindow
paned_window.sash_position(50)

root.mainloop()

In this example, a PanedWindow is created with the VERTICAL orientation, and two panes are added to it. The sash_position method is then called to set the position of the sash at the middle of the PanedWindow.

panecget and paneconfigure:

Get or set options for a pane within the PanedWindow.

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
pane1.config(bg='green')

In this example, two panes are added to the PanedWindow, and then the background color of the first pane is changed to green using the config method, which is equivalent to calling the paneconfigure method with the first pane as an argument.

Note that the panecget and paneconfigure methods can be used to get or set any option for a pane within the PanedWindow.

The sash_coord, sash_place, panecget, and paneconfigure methods:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the current position of the sash
sash_pos = paned_window.sash_coord(0)
print('Current sash position:', sash_pos)

# Set the position of the sash
paned_window.sash_place(0, 200)

# Get the current background color of pane 1
bg_color = pane1.cget('bg')
print('Current background color of pane 1:', bg_color)

# Change the background color of pane 1
pane1.config(bg='green')

root.mainloop()

• This code creates a horizontal PanedWindow with two panes, and then:
• Retrieves the current position of the sash using the sash_coord method and prints it to the console.
• Sets the position of the sash to 200 pixels using the sash_place method.
• Retrieves the current background color of pane 1 using the cget method and prints it to the console.
• Changes the background color of pane 1 to green using the config method.
• You can experiment with different values for the sash position and background color to see how they affect the layout and appearance of the PanedWindow.

identify:

Returns the index of the pane containing the specified widget.

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
index = paned_window.identify(pane2)

In this example, two panes are added to the PanedWindow, and then the index of the second pane is retrieved using the identify method.

identify method another example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the index of pane 2 in the PanedWindow
index = paned_window.identify(pane2)
print('Index of pane 2:', index)

root.mainloop()

In this example, two panes are added to the PanedWindow, and then the identify method is called to retrieve the index of the second pane in the PanedWindow.

proxy:

Returns a proxy object for a pane, which can be used to configure the pane without actually

adding it to the PanedWindow.

paned_window = PanedWindow(root)
proxy = paned_window.proxy()
pane1 = Label(proxy, text='Pane 1', bg='red')
pane2 = Label(proxy, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)

• In this example, a proxy object is created using the proxy method, and then two panes are created using the proxy object.
• These panes are then added to the PanedWindow using the add method.
• The advantage of using a proxy object is that you can configure the panes before adding them to the PanedWindow, which can be useful if you need to set options that affect the layout of the panes.

proxy method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
proxy = paned_window.proxy()
pane1 = Label(proxy, text='Pane 1', bg='red')
pane2 = Label(proxy, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Configure the proxy object
proxy.config(sashwidth=10)

root.mainloop()

• In this example, a proxy object is created using the proxy method, and then two panes are created using the proxy object.
• These panes are then added to the PanedWindow using the add method.
• The config method is then used to set the sashwidth option of the proxy object.

panes method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the list of panes in the PanedWindow
panes = paned_window.panes()
for pane in panes:
print(pane)

root.mainloop()

• In this example, a PanedWindow is created with two panes, and the panes method is called to get a list of all the panes in the PanedWindow.
• The for loop is then used to print the text of each pane.

configure method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Configure the PanedWindow
paned_window.configure(bg='white')

root.mainloop()

In this example, a PanedWindow is created with two panes, and the configure method is called to set the background color of the PanedWindow to white.

forget method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Remove the second pane from the PanedWindow
paned_window.forget(pane2)

root.mainloop()

In this example, a PanedWindow is created with two panes, and the forget method is called to remove the second pane from the PanedWindow.

panecget method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the background color of the first pane
bg_color = paned_window.panecget(pane1, 'bg')
print(bg_color)

root.mainloop()

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the background color of the first pane
bg_color = paned_window.panecget(pane1, 'bg')
print(bg_color)

root.mainloop()

panedheight and panedwidth methods example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the height and width of the sash
sash_height = paned_window.panedheight()
sash_width = paned_window.panedwidth()
print(sash_height, sash_width)

root.mainloop()

• In this example, a PanedWindow is created with two panes, and the panedheight and panedwidth methods are called to get the height and width of the sash.
• The values are then printed to the console.

sash_coord method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=VERTICAL)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Get the coordinates of the sash
sash_coords = paned_window.sash_coord(0)
print(sash_coords)

root.mainloop()

• In this example, a PanedWindow is created with two panes, and the sash_coord method is called to get the coordinates of the sash.
• Since the orient option is set to VERTICAL, the method takes an integer argument representing the pane index, in this case 0 for the first pane.
• The coordinates of the sash are then printed to the console.

sash_place method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Move the sash to a new position
paned_window.sash_place(0, 200)

root.mainloop()

• In this example, a PanedWindow is created with two panes, and the sash_place method is called to move the sash to a new position.
• The method takes two arguments: the index of the pane to the left of the sash (in this case, 0 for the first pane), and the new position of the sash in pixels.
• The sash is moved 200 pixels to the right, effectively resizing the first pane and shrinking the second pane.

sash_relplace method example:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
pane1 = Label(paned_window, text='Pane 1', bg='red')
pane2 = Label(paned_window, text='Pane 2', bg='blue')
paned_window.add(pane1)
paned_window.add(pane2)
paned_window.pack(fill=BOTH, expand=True)

# Move the sash to a new relative position
paned_window.sash_relplace(0, 0.3)

root.mainloop()

• In this example, a PanedWindow is created with two panes, and the sash_relplace method is called to move the sash to a new relative position.
• The method takes two arguments: the index of the pane to the left of the sash (in this case, 0 for the first pane), and the new position of the sash as a floating point value between 0 and 1.
• The sash is moved 30% to the right, effectively resizing the first pane and shrinking the second pane.

add(child, options)
The add(child, options) method is used to add a new child widget to a PanedWindow. The method takes two arguments:

child: the widget to add as a child.
options: a dictionary of options for the new child widget.
The following options can be used:

before:

specifies the index of the child widget to insert the new child widget before. If not specified, the new child widget will be added at the end.

after:

specifies the index of the child widget to insert the new child widget after. If not specified, the new child widget will be added at the end.

stretch:

specifies whether the new child widget should be resized when the PanedWindow is resized. Can be set to YES or NO. Default is YES.

Here’s an example that adds a Button widget to a PanedWindow using the add() method:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
paned_window.pack(fill=BOTH, expand=True)

button1 = Button(paned_window, text="Button 1")
paned_window.add(button1)

button2 = Button(paned_window, text="Button 2")
paned_window.add(button2, stretch=YES)

root.mainloop()

• In this example, a PanedWindow is created and added to the root window.
• Two Button widgets are created and added to the PanedWindow using the add() method.
• The first button is added without any options, while the second button is added with the stretch option set to YES, so it will be resized when the PanedWindow is resized.

get(startindex, endindex)
The get(startindex, endindex) method is used to retrieve information about the size and position of one or panes in a PanedWindow. The method takes two arguments:

startindex:

the index of the first pane to retrieve information for.

endindex:

the index of the last pane to retrieve information for.
The method returns a tuple containing the requested information.

The exact contents of the tuple depend on the options used when the panes were added to the PanedWindow.

Here’s an example that uses the get() method to retrieve the size of the first pane in a PanedWindow:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root)
paned_window.pack(fill=BOTH, expand=True)

button1 = Button(paned_window, text="Button 1")
paned_window.add(button1)

button2 = Button(paned_window, text="Button 2")
paned_window.add(button2, stretch=YES)

size = paned_window.get(0)
print(size)

root.mainloop()

• In this example, a PanedWindow is created and added to the root window.
• Two Button widgets are created and added to the PanedWindow using the add() method.
• The get() method is then used to retrieve the size of the first pane in the PanedWindow, which is index 0.
• The result is printed to the console.

config(options)
The config(options) method is used to configure the options of a PanedWindow. The method takes a dictionary of options and their values.

Here’s an example that uses the config() method to change the orientation of a PanedWindow to vertical:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=HORIZONTAL)
paned_window.pack(fill=BOTH, expand=True)

button1 = Button(paned_window, text="Button 1")
paned_window.add(button1)

button2 = Button(paned_window, text="Button 2")
paned_window.add(button2, stretch=YES)

paned_window.config(orient=VERTICAL)

root.mainloop()

• In this example, a PanedWindow is created with horizontal orientation and added to the root window.
• Two Button widgets are created and added to the PanedWindow using the add() method.
• The config() method is then used to change the orientation of the PanedWindow to vertical.
• The result is that the two buttons are now stacked on top of each other instead of side by side.

The uses of Tkinter PanedWindow with code examples
The PanedWindow widget in Tkinter is useful for creating resizable panes that can be used to display multiple widgets in a single window. Here are some examples of how to use PanedWindow:

Creating a split-pane window:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=HORIZONTAL)
paned_window.pack(fill=BOTH, expand=True)

left_label = Label(paned_window, text="Left pane")
paned_window.add(left_label)

right_label = Label(paned_window, text="Right pane")
paned_window.add(right_label)

root.mainloop()

• In this example, a PanedWindow is created with two Label widgets added to it.
• The orient option is set to HORIZONTAL to create a horizontal split-pane window.
• The fill and expand options are set to BOTH and True respectively to allow the PanedWindow to fill the available space in the root window.

Creating a nested split-pane window:

from tkinter import *

root = Tk()

outer_paned_window = PanedWindow(root, orient=HORIZONTAL)
outer_paned_window.pack(fill=BOTH, expand=True)

left_label = Label(outer_paned_window, text="Left pane")
outer_paned_window.add(left_label)

inner_paned_window = PanedWindow(outer_paned_window, orient=VERTICAL)
outer_paned_window.add(inner_paned_window)

top_label = Label(inner_paned_window, text="Top pane")
inner_paned_window.add(top_label)

bottom_label = Label(inner_paned_window, text="Bottom pane")
inner_paned_window.add(bottom_label)

root.mainloop()

• In this example, an outer PanedWindow is created with a Label widget added to it.
• A second PanedWindow is created and added to the outer PanedWindow.
• Two Label widgets are added to the inner PanedWindow.
• The orient option is set to HORIZONTAL for the outer PanedWindow and VERTICAL for the inner PanedWindow to create a nested split-pane window.

Creating a resizable grid of widgets:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=VERTICAL)
paned_window.pack(fill=BOTH, expand=True)

top_pane = PanedWindow(paned_window, orient=HORIZONTAL)
paned_window.add(top_pane, stretch=TRUE)

bottom_pane = PanedWindow(paned_window, orient=HORIZONTAL)
paned_window.add(bottom_pane, stretch=TRUE)

button1 = Button(top_pane, text="Button 1")
top_pane.add(button1, stretch=TRUE)

button2 = Button(top_pane, text="Button 2")
top_pane.add(button2, stretch=TRUE)

button3 = Button(bottom_pane, text="Button 3")
bottom_pane.add(button3, stretch=TRUE)

button4 = Button(bottom_pane, text="Button 4")
bottom_pane.add(button4, stretch=TRUE)

root.mainloop()

• In this example, a PanedWindow is created with vertical orientation.
• Two PanedWindow widgets are added to the PanedWindow, one above the other.
• Four Button widgets are added to the PanedWindow, with two in each PanedWindow.
• The stretch option is set to TRUE for each Button widget to allow them to be resized when the window is resized.
• This creates a grid of resizable buttons.

Creating a resizable image viewer:

from tkinter import *
from PIL import Image, ImageTk

root = Tk()

image = Image.open("example.jpg")
photo = ImageTk.PhotoImage(image)

paned_window = PanedWindow(root, orient=VERTICAL)
paned_window.pack(fill=BOTH, expand=True)

canvas = Canvas(paned_window)
canvas.create_image(0, 0, anchor=NW, image=photo)
paned_window.add(canvas, stretch=TRUE)

scrollbar = Scrollbar(paned_window, command=canvas.yview)
paned_window.add(scrollbar, stretch=FALSE)
canvas.configure(yscrollcommand=scrollbar.set)

root.mainloop()

• In this example, a PanedWindow is created with vertical orientation.
• An image is loaded from a file and displayed in a Canvas widget added to the PanedWindow.
• A Scrollbar widget is added to the PanedWindow to allow the image to be scrolled vertically.
• The stretch option is set to TRUE for the Canvas widget to allow it to be resized when the window is resized.

Creating a resizable text editor:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=VERTICAL)
paned_window.pack(fill=BOTH, expand=True)

text = Text(paned_window)
paned_window.add(text, stretch=TRUE)

scrollbar = Scrollbar(paned_window, command=text.yview)
paned_window.add(scrollbar, stretch=FALSE)
text.configure(yscrollcommand=scrollbar.set)

root.mainloop()

• In this example, a PanedWindow is created with vertical orientation.
• A Text widget is added to the PanedWindow to allow text to be entered and edited.
• A Scrollbar widget is added to the PanedWindow to allow the text to be scrolled vertically.
• The stretch option is set to TRUE for the Text widget to allow it to be resized when the window is resized.

Creating a resizable calculator:

Here’s an example of how to create a resizable calculator using PanedWindow in Tkinter:

from tkinter import *

root = Tk()

paned_window = PanedWindow(root, orient=VERTICAL)
paned_window.pack(fill=BOTH, expand=True)

entry = Entry(paned_window, justify=RIGHT)
paned_window.add(entry, stretch=TRUE)

button_frame = Frame(paned_window)
paned_window.add(button_frame, stretch=TRUE)

button_frame.columnconfigure(0, weight=1)
button_frame.columnconfigure(1, weight=1)
button_frame.columnconfigure(2, weight=1)
button_frame.columnconfigure(3, weight=1)

button1 = Button(button_frame, text="1")
button1.grid(row=0, column=0, sticky="NESW")

button2 = Button(button_frame, text="2")
button2.grid(row=0, column=1, sticky="NESW")

button3 = Button(button_frame, text="3")
button3.grid(row=0, column=2, sticky="NESW")

button4 = Button(button_frame, text="4")
button4.grid(row=1, column=0, sticky="NESW")

button5 = Button(button_frame, text="5")
button5.grid(row=1, column=1, sticky="NESW")

button6 = Button(button_frame, text="6")
button6.grid(row=1, column=2, sticky="NESW")

button7 = Button(button_frame, text="7")
button7.grid(row=2, column=0, sticky="NESW")

button8 = Button(button_frame, text="8")
button8.grid(row=2, column=1, sticky="NESW")

button9 = Button(button_frame, text="9")
button9.grid(row=2, column=2, sticky="NESW")

button0 = Button(button_frame, text="0")
button0.grid(row=3, column=1, sticky="NESW")

plus_button = Button(button_frame, text="+")
plus_button.grid(row=0, column=3, rowspan=2, sticky="NESW")

minus_button = Button(button_frame, text="-")
minus_button.grid(row=2, column=3, rowspan=2, sticky="NESW")

equal_button = Button(button_frame, text="=")
equal_button.grid(row=3, column=2, sticky="NESW")

clear_button = Button(button_frame, text="C")
clear_button.grid(row=3, column=0, sticky="NESW")

root.mainloop()

In this example, a PanedWindow is created with vertical orientation.

• An Entry widget is added to the top pane of the PanedWindow to display the calculator input and output.
• A Frame widget is added to the bottom pane of the PanedWindow to hold the calculator buttons.
• The Frame is divided into a 4×4 grid using the columnconfigure() method.
• The calculator buttons are then added to the grid using the grid() method.
• The stretch option is set to TRUE for both the Entry widget and the Frame widget to allow them to be resized when the window is resized.

complete application by PanedWindow
 Here’s an example application that uses PanedWindow in Tkinter.

It’s a simple text editor with a resizable file explorer pane and a text editing pane.

import tkinter as tk
import os

class TextEditor:

def __init__(self, master):
self.master = master
master.title("Text Editor")
master.geometry("800x600")

# Create paned window
self.panedwindow = tk.PanedWindow(self.master, orient=tk.HORIZONTAL)
self.panedwindow.pack(fill=tk.BOTH, expand=True)

# Create file explorer pane
self.file_explorer = tk.Frame(self.panedwindow, width=200, height=600)
self.file_explorer.pack(fill=tk.BOTH, expand=True)
self.panedwindow.add(self.file_explorer)

# Create scrollbar for file explorer
self.scrollbar = tk.Scrollbar(self.file_explorer, orient=tk.VERTICAL)
self.scrollbar.pack(side=tk.RIGHT, fill=tk.Y)

# Create file explorer listbox
self.listbox = tk.Listbox(self.file_explorer, yscrollcommand=self.scrollbar.set)
self.listbox.pack(fill=tk.BOTH, expand=True)
self.listbox.bind("<Double-Button-1>", self.open_file)

# Set scrollbar to listbox
self.scrollbar.config(command=self.listbox.yview)

# Create text editing pane
self.text_pane = tk.Text(self.panedwindow)
self.panedwindow.add(self.text_pane)

# Bind events for file explorer pane
self.file_explorer.bind("<Configure>", self.resize_file_explorer)
self.listbox.bind("<ButtonRelease-1>", self.show_selection)

# Populate file explorer
self.populate_file_explorer()

def populate_file_explorer(self):
# Get files in current directory
files = os.listdir()

# Add files to listbox
for file in files:
if os.path.isfile(file):
self.listbox.insert(tk.END, file)

def open_file(self, event):
# Get filename from listbox selection
selection = self.listbox.curselection()
filename = self.listbox.get(selection)

# Open file and populate text pane
with open(filename, "r") as file:
contents = file.read()
self.text_pane.delete("1.0", tk.END)
self.text_pane.insert(tk.END, contents)

def resize_file_explorer(self, event):
# Resize scrollbar and listbox to fill file explorer pane
self.scrollbar.configure(width=20)
self.scrollbar.place(x=self.file_explorer.winfo_width() - 20, y=0, height=self.file_explorer.winfo_height())
self.listbox.configure(width=self.file_explorer.winfo_width()-20)

def show_selection(self, event):
# Get selected item in listbox and print to console
selection = self.listbox.curselection()
if selection:
index = selection[0]
data = self.listbox.get(index)
print(data)

root = tk.Tk()
text_editor = TextEditor(root)
root.mainloop()

• This application creates a PanedWindow with a file explorer pane on the left and a text editing pane on the right.
• The file explorer pane contains a listbox that displays the files in the current directory, and the text editing pane contains a Text widget for editing the selected file.
• The user can resize the panes by dragging the divider between them.

multichoice quiz with answers about this lesson

1-What is PanedWindow in Tkinter?

A) A widget used for displaying tabular data
B) A container widget used for organizing other widgets with a resizable divider
C) A widget used for creating pop-up menus
Answer: B

2-Which method is used to add a child widget to a PanedWindow?

A) add_child()
B) add()
C) add_widget()
Answer: B

3-Which option is used to set the minimum size of a pane in a PanedWindow?

A) minsize
B) mintext
C) minwidth
Answer: A

4-Which method is used to get the position of the divider between panes in a PanedWindow?

A) get_divider_position()
B) get_position()
C) get()
Answer: A

5-Which event is used to resize the contents of a PanedWindow when the window is resized?

A) <Configure>
B) <Resize>
C) <WindowResize>
Answer: A

6-Which option is used to set the initial position of the divider in a PanedWindow?

A) position
B) start
C) initial
Answer: B

7-Which method is used to remove a child widget from a PanedWindow?

A) remove_child()
B) remove()
C) delete()
Answer: B

8-Which option is used to set the maximum size of a pane in a PanedWindow?

A) maxsize
B) maxwidth
C) maxtext
Answer: A

9-Which method is used to configure the options of a PanedWindow after it has been created?

A) config()
B) options()
C) configure()
Answer: A

10-Which option is used to set the orientation of a PanedWindow?

A) orientation
B) orient
C) layout
Answer: B

11-Which method is used to get the number of panes in a PanedWindow?

A) get_count()
B) count()
C) size()
Answer: B

12-Which option is used to set the border width of a PanedWindow?

A) border
B) borderwidth
C) bd
Answer: C

13-Which method is used to get the minimum size of a pane in a PanedWindow?

A) get_minsize()
B) minsize()
C) get_min()
Answer: B

14-Which option is used to set the color of the divider between panes in a PanedWindow?

A) background
B) foreground
C) dividercolor
Answer: A

15-Which method is used to set the position of the divider between panes in a PanedWindow?

A) set_divider_position()
B) set_position()
C) set()
Answer: A

16-Which option is used to specify whether the panes in a PanedWindow should have equal size?

A) uniform
B) equal
C) size
Answer: A

17-Which method is used to get the size of a pane in a PanedWindow?

A) get_size()
B) size()
C) get()
Answer: B

18-Which option is used to set the relief style of a PanedWindow?

A) relief
B) style
C) borderstyle
Answer: A

19-Which method is used to adjust the size of a pane in a PanedWindow?

A) adjust()
B) resize()
C) configure()
Answer: B

20-Which option is used to set the cursor style when hovering over the divider between panes in a PanedWindow?

A) cursor
B) dividercursor
C) hovercursor
Answer: A

21-Which method is used to remove a pane from a PanedWindow?

A) remove_pane()
B) remove()
C) delete()
Answer: B

22-Which option is used to specify the orientation of a PanedWindow?

A) orientation
B) orient
C) direction
Answer: B

Which method is used to set the minimum size of a pane in a PanedWindow?

A) set_minsize()
B) minsize()
C) set_min()
Answer: B

23-Which option is used to set the width of the divider between panes in a PanedWindow?

A) dividerwidth
B) width
C) size
Answer: A

24-Which method is used to swap the positions of two adjacent panes in a PanedWindow?

A) swap()
B) switch()
C) exchange()
Answer: C

25-Which option is used to specify the font used in a PanedWindow?

A) font
B) panefont
C) pane_font
Answer: A

26-Which method is used to get the position of the divider between panes in a PanedWindow?

A) get_divider_position()
B) get_position()
C) position()
Answer: A

27-Which option is used to set the height of the divider between panes in a PanedWindow?

A) dividerheight
B) height
C) size
Answer: A

28-Which method is used to adjust the minimum size of a pane in a PanedWindow?

A) adjust_minsize()
B) resize_minsize()
C) configure_minsize()
Answer: B

29-Which option is used to set the anchor position of a pane in a PanedWindow?

A) anchor
B) paneanchor
C) pane_anchor
Answer: A

References of this lesson

“The Tkinter PanedWindow Widget” TkDocs.com.
“Tkinter PanedWindow Widget” GeeksforGeeks.org
“Tkinter PanedWindow” Programiz.com. [Online]. Available:
“Tkinter PanedWindow widget” effbot.org. [Online]. Available: