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Tkinter GUI Application Development Blueprints

Tkinter GUI Application Development Blueprints

By : Bhaskar Chaudhary
4 (28)
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Tkinter GUI Application Development Blueprints

Tkinter GUI Application Development Blueprints

4 (28)
By: Bhaskar Chaudhary
Buy this Book

Overview of this book

Tkinter is the built-in GUI package that comes with standard Python distributions. It is a cross-platform package, which means you build once and deploy everywhere. It is simple to use and intuitive in nature, making it suitable for programmers and non-programmers alike. This book will help you master the art of GUI programming. It delivers the bigger picture of GUI programming by building real-world, productive, and fun applications such as a text editor, drum machine, game of chess, media player, drawing application, chat application, screen saver, port scanner, and many more. In every project, you will build on the skills acquired in the previous project and gain more expertise. You will learn to write multithreaded programs, network programs, database driven programs and more. You will also get to know the modern best practices involved in writing GUI apps. With its rich source of sample code, you can build upon the knowledge gained with this book and use it in your own projects in the discipline of your choice.
Table of Contents (10 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
Lock Free Chapter
1
1. Meet Tkinter
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1. Meet Tkinter
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Objectives of this chapter
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Installing Python and Tkinter
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Importing Tkinter
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GUI programming – the big picture
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The root window – your drawing board
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Widgets – the building blocks of GUI programs
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The Tkinter geometry manager
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Events and callbacks – adding life to programs
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Handling widget-specific variables
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Event unbinding and virtual events
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Doing it in style
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Some common root window options
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Summary
2
2. Making a Text Editor
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2. Making a Text Editor
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Objectives of the chapter
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An overview of the chapter
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Setting up the editor skeleton
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Adding a menu and menu items
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Implementing the View menu
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Adding a built-in functionality
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Indexing and tagging
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Implementing the Select All feature
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Implementing the Find Text feature
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Types of Toplevel windows
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Working with forms and dialogs
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Working with message boxes
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The icons toolbar and View menu functions
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Displaying the line number
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Adding the cursor information bar
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Adding themes
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Creating the context/pop-up menu
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Summary
3
3. Programmable Drum Machine
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3. Programmable Drum Machine
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An overview of the chapter
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Module requirements for the chapter
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Setting up the GUI in OOP
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Finalizing the data structure
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Creating broader visual elements
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Loading drum samples
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Playing the drum machine
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Tkinter and threading
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Support for multiple beat patterns
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Saving beat patterns
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Working with ttk-themed widgets
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Summary
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4. A Game of Chess
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4. A Game of Chess
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An overview of the chapter
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Structuring our program
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Modeling the data structures
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Creating a Piece class
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Making the game functional
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Managing user preferences
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Summary
5
5. Building an Audio Player
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5. Building an Audio Player
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An overview of the chapter
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External library requirements
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Program structure and broadview skeleton
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Deciding the data structure
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Creating the Player class
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Adding and removing items from a playlist
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Playing audio and adding audio controls
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Creating a seek bar
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One-time updates during audio playback
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Managing continuous updates
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Looping over tracks
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Adding a tooltip
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Summary
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6. Paint Application
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6. Paint Application
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Creating a tiny framework
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Setting up a broad GUI structure
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Dealing with mouse events
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Adding toolbar buttons
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Drawing items on the canvas
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Adding a color palette
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Adding top bar options for draw methods
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Drawing irregular lines and super shapes
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Adding functionality to the remaining buttons
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Adding functionality to menu items
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Summary
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7. Multiple Fun Projects
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7. Multiple Fun Projects
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Chapter objectives
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Building a screen saver
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Building a Snake game
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Creating a Weather Reporter
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Creating a phone book application
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Graphing with Tkinter
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3D graphics with Tkinter
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Summary
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8. Miscellaneous Tips
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8. Miscellaneous Tips
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Chapter objectives
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Tracing Tkinter variables
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Widget traversal
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Validating user input
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Formatting widget data
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More on fonts
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Redirecting the command-line output to Tkinter
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The class hierarchy of Tkinter
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Tips for program design
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Tips for program optimization
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Distributing a Tkinter application
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The limitations of Tkinter
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Tkinter in Python 2.x
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Summary
9
Index
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Index

Setting up the GUI in OOP

The text editor we developed in the previous chapter was implemented in procedural code. Although it offered some benefits for quick coding, it had some typical limitations:

  • We started encountering global variables
  • The function definitions needed to
  • be defined above the code that called them
  • Most importantly the code
  • was not reusable.

Therefore, we need some way to ensure that our code is more reusable. This is why programmers prefer to use Object Oriented Programming (OOP) to organize their code into classes.

OOP is a programming paradigm that shifts the focus onto the objects we want to manipulate rather than the logic required to manipulate them.

This is in contrast to procedural programming that views a program as a logical procedure that takes input, processes it, and produces some output.

OOP provides several benefits such as data abstraction, encapsulation, inheritance, and polymorphism. In addition, OOP provides a clear modular structure for programs. Code modification...

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