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

Using the Spin Box widget


The Spin Box widget is used for displaying integer values, floating-point values, and text. It applies a constraint on the user: the user cannot enter any random data, but can select only from the available options displayed through Spin Box. A Spin Box widget displays an initial value by default that can be increased or decreased by selecting the up/down button or up/down arrow key on the keyboard. You can choose a value that is displayed by either clicking on it or typing it in manually.

Getting ready

A Spin Box widget can be created using two classes, QSpinBox and QDoubleSpinBox, where QSpinBox displays only integer values, and the QDoubleSpinBox class displays floating-point values. Methods provided by QSpinBox are shown in the following list:

  • value(): This method returns the current integer value selected from the spin box.
  • text(): This method returns the text displayed by the spin box.
  • setPrefix(): This method assigns the prefix text that is prepended to the value...