Tkinter Combobox widget is one of the useful widgets to implement dropdown menus in an application. It uses the combination of the Entry widget and ListBox widget on the top of it. We can select Menu items by typing the item name (if it exists in the Menu List) in the Entry field. However, sometimes, there might be cases when we need to use autocompletion to select the menu items.In order to create an auto-completion Combobox, we will create a Listbox first to list out the menus and an Entry widget to display the selected Menu. You can bind the ... Read More

Tkinter has lots of inbuilt functions and methods that can be used configure the properties of Tkinter widgets. These properties vary with different geometry managers. The grid geometry manager is one of them which deals with many complex layout problems in any application. Grid geometry manager adds all the widgets in the given space (if applicable) without overlapping each other.Let us suppose that we have created a sticky frame using Grid geometry manager and we want to center the Label text widget inside the frame. In this case, we have to first make the main window sticky by configuring the ... Read More

The margin of a tkinter window can be controlled by specifying the value of fill, expand and padding. Another way to set the margin of a tkinter window is to use grid(**options) Geometry Manager. Grid pack manager allows us to add the margin by specifying the value of row and column property.Example# Import the required library from tkinter import * from tkinter import ttk # Create an instance of tkinter frame win= Tk() # Set the size of the Tkinter window win.geometry("700x350") # Add a frame to set the size of the window frame= Frame(win, relief= 'sunken', ... Read More

Label widgets in Tkinter are used to display text and images. We can link a URL with the label widget to make it clickable. Whenever the label widget is clicked, it will open the attached link in the default browser.To work with the browser and hyperlinks we can use webbrowser module in Python. The module is accessible in Python extension library and can be installed by typing the command pip install webbrowser in the shell.ExampleIn this application, we will create a Label which turns out to be a Hyperlink referring to a webpage.# Import the required library from tkinter import ... Read More

Tkinter is a Python library which is used to create GUI-based application. Let us suppose that we have to create a functional application in which a particular function is defined in a loop. The recursive function will display some text in a Label widget for infinite times.To stop this recursive function, we can define a function which changes the condition whenever a button is clicked. The condition can be changed by declaring a global variable which can be either True or False.Example# Import the required library from tkinter import * # Create an instance of tkinter frame win= Tk() ... Read More

In order to view the widgets on the screen, we have to first associate each and every widget with the geometry manager. There are three ways in which we can view our widgets in the application. The Grid and Pack geometry manager are mostly used in many applications.Pack Geometry ManagerThe Pack geometry manager is one of the simplest geometry managers. We can use Pack manager to provide additional properties to the widgets such as padding, position respect to the X and Y axis, and expand property. It works on the basis of single row and single column. All the properties ... Read More

Tkinter Entry widgets accept single-line user input in a text field. We can change the properties of the Entry widget by providing the default attributes and values in its constructor.Let us suppose that we want to create a full-width Entry widget for an application. There are several ways to do that but if we consider the simplest case where we use Pack Geometry Manager to display the Entry widget, then we can definitely set the width of Entry widget by adding fill(x or y) property.Example# Import the required library from tkinter import * from tkinter import ttk # Create ... Read More

Tkinter Text widgets are generally used for accepting multiline user input in the given text field. For a particular text document, the content may contain hyperlinks too which is useful in case we want to redirect the user. You can create hyperlinks within the text widget by using HyperLinkManager snippet in Python.The HyperLinkManager code snippet adds the hyperlink on the keyword within the text widget. You can download the HyperLinkManager Snippet from here−https://github.com/codewithdev/Code-Snippets/blob/master/tkinter/tkHyperlinkManager.py/Once the snippet has been downloaded, you can import it in the notebook by typing "from tkHyperLinkManager import HyperlinkManager"Example# Import the required libraries from tkinter import * from ... Read More

Open CV is a Python library that is used to work with Computer Vision and other artificial artifacts. Open CV has inbuilt functions and methods which provide access to work with Computer Vision in Artificial Intelligence and Machine Learning. Some of the examples of Open CV are: face detection, object detection, X-ray and other industrial uses.Using Tkinter Library, we can create an interactive application that uses OpenCV as the essential part of the application.To create the application, you are required to install OpenCV in your local machine and make sure that Python Pillow package is pre-installed. You can install these ... Read More

The Geometry Manager is one of the specific features in the Tkinter Library. It provides structure to all the Tkinter widgets in the window. The Geometry Manager is used for formatting the layout and position of the widget in a Tkinter application window.To format the look and appearance of any widget, we have three general methods in Geometry Manager.Pack Geometry ManagerGrid Geometry ManagerPlace Geometry ManagerEach Geometry Manager has some features that provide a different style and layout to the widgets. The Pack Geometry Manager is the most commonly used layout manager which gives access to add padding, margin, fill and ... Read More