Book Image

Qt5 Python GUI Programming Cookbook

By : B. M. Harwani
Book Image

Qt5 Python GUI Programming Cookbook

By: B. M. Harwani

Overview of this book

PyQt is one of the best cross-platform interface toolkits currently available; it's stable, mature, and completely native. If you want control over all aspects of UI elements, PyQt is what you need. This book will guide you through every concept necessary to create fully functional GUI applications using PyQt, with only a few lines of code. As you expand your GUI using more widgets, you will cover networks, databases, and graphical libraries that greatly enhance its functionality. Next, the book guides you in using Qt Designer to design user interfaces and implementing and testing dialogs, events, the clipboard, and drag and drop functionality to customize your GUI. You will learn a variety of topics, such as look and feel customization, GUI animation, graphics rendering, implementing Google Maps, and more. Lastly, the book takes you through how Qt5 can help you to create cross-platform apps that are compatible with Android and iOS. You will be able to develop functional and appealing software using PyQt through interesting and fun recipes that will expand your knowledge of GUIs
Table of Contents (20 chapters)
Title Page
Dedication
Packt Upsell
Contributors
Preface
Index

Displaying LCD digits


Qt Designer enables us to display LCD-like digits of any size by making use of its LCD Number widget. The LCD Number widget is an instance of the QLCDNumber class and it can be used to display decimal, hexadecimal, octal, and binary digits of any size. The methods provided by QLCDNumber are as follows:

  • setMode(): This method is used to change the base of the numbers. Available options are as follows:
    • Hex: This option is used to display hexadecimal digits
    • Dec: This option is used to display decimal digits
    • Oct: This option is used to display octal digits
    • Bin: This option is used to display binary digits
  • display(): This method is used to display the supplied data in LCD digit format.
  • value(): This method returns the numerical value displayed by the LCD Number widget.

We want the displayed system clock time to be updated automatically. For this, we need to implement timers.

Using Timers

Timers are used for performing repetitive tasks. A timer is an instance of the QTimer class....