Tkinter PanedWindow

When designing user interfaces in Python with Tkinter, the PanedWindow widget provides a flexible way to create resizable layouts. It acts as a container for child widgets (panes) arranged either horizontally or vertically, with the ability for users to resize them by dragging the separator lines known as sashes.

Each pane can contain only one widget, making PanedWindow ideal for split views or adjustable UI components in Python applications.

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Syntax for Using PanedWindow

w = PanedWindow(master, options)

Here, master refers to the parent widget, and options define various properties of the PanedWindow.

Options in PanedWindow

Below is a list of possible options you can use to customize the PanedWindow widget:

SN	Option	Description
1	bg	Sets the background color when the widget doesn’t have focus.
2	bd	Defines the 3D border size. Default: 2 pixels.
3	borderwidth	Specifies the border width. Default: 2 pixels.
4	cursor	Changes the mouse pointer type when hovering.
5	handlepad	Distance between the handle and the end of the sash. Default: 8 pixels.
6	handlesize	Size of the handle. Default: 8 pixels (always square).
7	height	Height of the widget. If not specified, it is set based on child widgets.
8	orient	HORIZONTAL for side-by-side panes, VERTICAL for top-to-bottom panes.
9	relief	Type of border. Default: FLAT.
10	sashpad	Padding around each sash. Default: 0.
11	sashrelief	Border style around the sash. Default: FLAT.
12	sashwidth	Width of the sash. Default: 2 pixels.
13	showhandle	Set to True to display handles. Default: False.
14	width	Width of the widget. If not specified, it is determined by child widgets.

Methods Associated with PanedWindow

Here are the key methods used with PanedWindow:

SN	Method	Description
1	add(child, options)	Adds a child widget to the PanedWindow.
2	get(startindex, endindex)	Retrieves text from the specified range.
3	config(options)	Configures the widget with new options.

Example: Implementing a Simple PanedWindow in Tkinter

Here’s a Python example demonstrating the PanedWindow widget:

# !/usr/bin/python3  
from tkinter import *  
  
def add():  
    a = int(e1.get())  
    b = int(e2.get())  
    result = str(a + b)  
    left.insert(1, result)  
  
w1 = PanedWindow()  
w1.pack(fill=BOTH, expand=1)  
  
left = Entry(w1, bd=5)  
w1.add(left)  
  
w2 = PanedWindow(w1, orient=VERTICAL)  
w1.add(w2)  
  
e1 = Entry(w2)  
e2 = Entry(w2)  
  
w2.add(e1)  
w2.add(e2)  
  
bottom = Button(w2, text="Add", command=add)  
w2.add(bottom)  
  
mainloop()

Output:

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Conclusion

The Tkinter PanedWindow widget is a powerful tool for creating dynamic and adjustable layouts in Python applications. Whether you’re building file explorers, split views, or resizable UI components, PanedWindow simplifies the process. Understanding its options and methods helps in crafting intuitive and user-friendly interfaces.

Start experimenting with PanedWindow today and elevate your Python GUI development!

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