Book Image

Python GUI Programming - A Complete Reference Guide

By : Alan D. Moore, B. M. Harwani
Book Image

Python GUI Programming - A Complete Reference Guide

By: Alan D. Moore, B. M. Harwani

Overview of this book

A responsive graphical user interface (GUI) helps you interact with your application, improves user experience, and enhances the efficiency of your applications. With Python, you’ll have access to elaborate GUI frameworks that you can use to build interactive GUIs that stand apart from the rest. This Learning Path begins by introducing you to Tkinter and PyQt, before guiding you through the application development process. As you expand your GUI by adding more widgets, you'll work with networks, databases, and graphical libraries that enhance its functionality. You'll also learn how to connect to external databases and network resources, test your code, and maximize performance using asynchronous programming. In later chapters, you'll understand how to use the cross-platform features of Tkinter and Qt5 to maintain compatibility across platforms. You’ll be able to mimic the platform-native look and feel, and build executables for deployment across popular computing platforms. By the end of this Learning Path, you'll have the skills and confidence to design and build high-end GUI applications that can solve real-world problems. This Learning Path includes content from the following Packt products: Python GUI Programming with Tkinter by Alan D. Moore Qt5 Python GUI Programming Cookbook by B. M. Harwani

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Python GUI Programming - A Complete Reference Guide
Alan D. Moore | B. M. Harwani
Jun, 2019 | 12 hours 26 minutes
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Table of Contents (28 chapters)
Title Page
Title Page
Copyright
Copyright
Python GUI Programming - A Complete Reference Guide
About Packt
About Packt
Why Subscribe?
Packt.com
Contributors
Contributors
About the Authors
Packt Is Searching for Authors Like You
Preface
Preface
Who This Book Is For
What This Book Covers
To Get the Most out of This Book
Get in Touch
Free Chapter
1
Introduction to Tkinter
Introduction to Tkinter
Introducing Tkinter and Tk
Introducing IDLE
Creating a Tkinter Hello World
Summary
2
Designing GUI Applications with Tkinter
Designing GUI Applications with Tkinter
A problem at ABQ AgriLabs
Documenting specification requirements
Designing the application
Summary
3
Creating Basic Forms with Tkinter and ttk Widgets
Creating Basic Forms with Tkinter and ttk Widgets
Evaluating our technology choices
Exploring Tkinter widgets
Implementing the application
Summary
4
Reducing User Error with Validation and Automation
Reducing User Error with Validation and Automation
Validating user input
Validation in Tkinter
Implementing validated widgets in our form
Automating input
Summary
5
Planning for the Expansion of Our Application
Planning for the Expansion of Our Application
Separating concerns
Structuring our application directory
Splitting our application into multiple files
Using version control software
Summary
6
Creating Menus with Menu and Tkinter Dialogs
Creating Menus with Menu and Tkinter Dialogs
Solving problems in our application
Implementing simple Tkinter dialogs
Designing our menu 
Making our settings work
Summary
7
Navigating Records with Treeview
Navigating Records with Treeview
Implementing read and update in the model
Implementing a record list view
Modifying the record form for read and update
Updating the rest of the application
Summary
8
Improving the Look with Styles and Themes
Improving the Look with Styles and Themes
Working with images in Tkinter
Styling Tkinter widgets
Styling Ttk widgets
Summary
9
Creating Automated Tests with unittest
Creating Automated Tests with unittest
Automated testing basics
Testing Tkinter code
Writing tests for our application
Summary
10
Improving Data Storage with SQL
Improving Data Storage with SQL
PostgreSQL
SQL and relational database basics
Modeling relational data
Creating the ABQ database
Integrating SQL into our application
Summary
11
Connecting to the Cloud
Connecting to the Cloud
HTTP using urllib
HTTP using requests
FTP using ftplib
Summary
12
Visualizing Data Using the Canvas Widget
Visualizing Data Using the Canvas Widget
Drawing and animation with Tkinter's Canvas
Creating simple graphs on the canvas
Advanced graphs using Matplotlib and Tkinter
Summary
13
Creating a User Interface with Qt Components
Creating a User Interface with Qt Components
Introduction
Displaying a welcome message
Using the Radio Button widget
Grouping radio buttons
Displaying options in the form of checkboxes
Displaying two groups of checkboxes
14
Event Handling - Signals and Slots
Event Handling - Signals and Slots
Introduction
Using Signal/Slot Editor
Copying and pasting text from one Line Edit widget to another
Converting data types and making a small calculator
Using the Spin Box widget
Using scrollbars and sliders
Using List Widget
Selecting multiple list items from one List Widget and displaying them in another
Adding items into List Widget
Performing operations in List Widget
Using the Combo Box widget
Using the Font Combo Box widget
Using the Progress Bar widget
15
Understanding OOP Concepts
Understanding OOP Concepts
Object-oriented programming
Using classes in GUI
Using single inheritance
Using multilevel inheritance
Using multiple inheritance
16
Understanding Dialogs
Understanding Dialogs
Introduction
The input dialog box
Using the input dialog 
Using the color dialog
Using the font dialog
Using the file dialog
17
Understanding Layouts
Understanding Layouts
Understanding layouts
Using Horizontal Layout
Using Vertical Layout
Using Grid Layout
Using Form Layout
18
Networking and Managing Large Documents
Networking and Managing Large Documents
Introduction
Creating a small browser
Creating a server-side application
Establishing client-server communication
Creating a dockable and floatable sign-in form
Multiple Document Interface 
Displaying information in sections using Tab Widget
Creating a custom menu bar
19
Database Handling
Database Handling
Introduction
Creating a database
Creating a database table
Inserting rows in the specified database table
Displaying rows in the specified database table
Navigating through the rows of the specified database table
Searching a database table for specific information
Creating a signin form – applying an authentication procedure
Updating a database table – changing a user's password 
Deleting a row from a database table
20
Using Graphics
Using Graphics
Introduction
Displaying mouse coordinates
Displaying coordinates where the mouse button is clicked and released
Displaying a point where the mouse button is clicked
Drawing a line between two mouse clicks
Drawing lines of different types
Drawing a circle of a desired size
Drawing a rectangle between two mouse clicks
Drawing text in a desired font and size
Creating a toolbar that shows different graphics tools
Plotting a line using Matplotlib
Plotting a bar using Matplotlib
21
Implementing Animation
Implementing Animation
Introduction
Displaying a 2D graphical image
Making a ball move down on the click of a button
Making a bouncing ball
Making a ball animate as per the specified curve
22
Using Google Maps
Using Google Maps
Introduction
Finding out details of a location or a landmark
Getting complete information from latitude and longitude values
Finding out the distance between two locations
Displaying location on Google Maps 
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Styling Tkinter widgets

Tkinter has essentially two styling systems: the old Tkinter widgets system, and the newer Ttk system. Since we still need to work with both Tkinter and Ttk widgets, we'll have to look at both systems. Let's take a look first at the older Tkinter system and apply some styling to the Tkinter widgets in our application.

Widget color properties

Basic Tkinter widgets allow you to change two colors: foreground, meaning mainly the text and borders, and background, meaning the rest of the widget. These can be set using the foreground and background arguments, or their aliases fg and bg.

This example shows the use of colors on a Label:

l = tk.Label(text='Hot Dog!', fg='yellow', bg=&apos...
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