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Articles on Trending Technologies
Technical articles with clear explanations and examples
Using Tkinter in Jupyter Notebook
Tkinter is a Python library used for creating and developing GUI-based applications. It is completely open-source and works on Windows, Mac, Linux, and Ubuntu. Tkinter usually comes pre-installed with Python, but if needed, you can install it using pip install tkinter. In Jupyter Notebook, you can run Tkinter applications, though they will open in separate windows. Verifying Tkinter Installation Once you have Tkinter available, you can verify the installation by importing it ? from tkinter import * print("Tkinter imported successfully!") Tkinter imported successfully! Basic Tkinter Window Let's create a simple ...
Read MoreSet a default value for a ttk Combobox in Tkinter?
Tkinter Combobox is used to add a drop-down menu to the Entry widget, making it useful to handle multiple data in any application. A Combobox widget can be created using ttk.Combobox(). To set a default value, we specify the index of the desired value using the current(index) method. Syntax To set a default value for a ttk Combobox ? combobox = ttk.Combobox(parent, values=('value1', 'value2', 'value3')) combobox.current(index) # index starts from 0 Example Here's how to create a Combobox with a default value ? # Import Tkinter library from tkinter import ...
Read MoreResize the Tkinter Listbox widget when the window resizes
Tkinter Listbox widgets display scrollable lists of items that users can select from. By default, Listbox widgets maintain a fixed size when the window is resized. However, you can make them resize dynamically with the window using specific packing options. To make a Listbox widget resize with the window, use expand=True and fill=BOTH properties. The expand property allows the widget to grow into available space, while fill=BOTH stretches the widget both vertically and horizontally. Basic Resizable Listbox Here's how to create a Listbox that resizes with the window ? import tkinter as tk # ...
Read MorePDF Viewer for Python Tkinter
Python provides the PyPDF2 library for handling PDF files, which can process, extract, merge, and encrypt PDF documents. Combined with Tkinter's GUI capabilities, we can create a simple PDF viewer application that allows users to open and read PDF files through a graphical interface. Installation and Setup Before creating the application, install the required library ? pip install PyPDF2 Note: PyPDF2's PdfFileReader is deprecated. Modern versions use PdfReader instead. Building the PDF Viewer Application The application consists of a text widget for displaying PDF content and a menu system for file operations ...
Read MoreOpening and reading a file with askopenfilename in Tkinter?
When a user wants to open a file from a directory, the preferred way to do this is to display a popup where the user selects a file to open. Like most tools and widgets, Tkinter provides us a way to open a dialog for opening a file, reading a file, saving a file. All these functionalities are part of filedialog module in Python. Just like other widgets, filedialog needs to be imported explicitly in the notebook. There are certain other modules that contain the filedialog such as askdirectory, askopenfilename, askopenfile, askopenfilenames, asksaveasfilename, etc. Syntax The askopenfilename() function ...
Read MoreMouse Position in Python Tkinter
Events are very useful to perform and manage multiple tasks in large-scale applications. We can bind a particular event with keyboard buttons or mouse buttons using the bind('handler', 'callback') method. Mouse pointer motion tracking is commonly used for building screensavers, 2D or 3D games, and interactive applications. To print the coordinates of the pointer, we bind the event with a callback function that gets the position in x and y variables. Basic Mouse Position Tracking Here's how to track mouse position and display coordinates in the console ? # Import tkinter library from tkinter import ...
Read MoreHow to word-wrap text in Tkinter Text?
Word wrapping is an essential feature in text editors that automatically breaks long lines to fit within the available width. In Tkinter, the Text widget provides a wrap parameter to control how text wrapping behaves. This parameter accepts three values: WORD, CHAR, or NONE. Wrap Options The wrap parameter determines how text flows in the Text widget ? WORD − Wraps text at word boundaries (default and most readable) CHAR − Wraps text at any character position NONE − No wrapping, text extends horizontally with scrollbar Example 1: Word Wrapping This example demonstrates ...
Read MoreHow to set the sticky button property properly?
Tkinter Buttons can be configured through different available attributes and properties. The sticky property makes a widget "stick" to specific sides of its grid cell, controlling alignment and expansion behavior. The sticky property accepts compass directions: N (North), E (East), S (South), W (West), and combinations like NE, NW, SE, SW. Basic Sticky Property Usage Here's how to use the sticky property with different directional values ? # Import the tkinter library from tkinter import * from tkinter import ttk # Create an instance of tkinter frame win = Tk() win.geometry("750x300") win.title("Sticky Button Example") ...
Read MoreHow to select at the same time from two Tkinter Listbox?
When building GUI applications with Tkinter, you may need to select items from multiple Listboxes simultaneously. By default, Tkinter's exportselection property causes selections to be cleared when you click on another widget. Setting exportselection=False maintains selections across multiple Listboxes. Understanding exportselection Property The exportselection property controls whether the selected items in a Listbox are exported to the system clipboard. When set to False, selections remain active even when interacting with other widgets. Example Here's how to create two Listboxes that maintain independent selections ? # Import Tkinter library from tkinter import * # ...
Read MoreHow to select a directory and store the location using Tkinter in Python?
Dialog boxes are essential components in GUI applications that enable user interaction. In Python's Tkinter, we can create file and directory selection dialogs using the filedialog module. This allows users to browse and select files or directories from their local system. Selecting a File Directory To select a directory (folder) instead of individual files, we use filedialog.askdirectory(). Here's how to create a simple directory selector ? # Import the Tkinter library from tkinter import * from tkinter import ttk from tkinter import filedialog # Create an instance of Tkinter frame win = Tk() win.title("Directory Selector") ...
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