Book Image

Pyside GUI Application Development- Second Edition - Second Edition

By : Venkateshwaran Loganathan, Gopinath Jaganmohan
Book Image

Pyside GUI Application Development- Second Edition - Second Edition

By: Venkateshwaran Loganathan, Gopinath Jaganmohan

Overview of this book

Elegantly-built GUI applications are always a massive hit among users. PySide is an open source software project that provides Python bindings for the Qt cross-platform UI framework. Combining the power of Qt and Python, PySide provides easy access to the Qt framework for Python developers and also acts as an excellent rapid application development platform. This book will take you through everything you need to know to develop UI applications. You will learn about installing and building PySide in various major operating systems as well as the basics of GUI programming. The book will then move on to discuss event management, signals and slots, and the widgets and dialogs available with PySide. Database interaction and manipulation is also covered. By the end of this book, you will be able to program GUI applications efficiently and master how to develop your own applications and how to run them across platforms.

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Pyside GUI Application Development- Second Edition - Second Edition
Venkateshwaran Loganathan | Gopinath Jaganmohan
Jan, 2016 | 144 pages
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Table of Contents (13 chapters)
PySide GUI Application Development Second Edition
PySide GUI Application Development Second Edition
Credits
Credits
About the Authors
About the Authors
About the Reviewer
About the Reviewer
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Getting Started with PySide
Getting Started with PySide
Introducing PySide
Hello, GUI
Setting up PySide
Installing PySide using Windows
Installing PySide using Mac OS X
Installing PySide using Linux
Building PySide on Windows
Building PySide on Linux
Building PySide
Importing PySide objects
First PySide application
Exception handling as a practice
Summary
2
Entering through Windows
Entering through Windows
Creating a simple window
Creating the application icon
Showing a tooltip
Adding a button
Centering the window on the screen
About box
Tracking time using timers
Windows style
Summary
3
Main Windows and Layout Management
Main Windows and Layout Management
Creating the main window
Status bar
Toolbar
Layout management
SDI and MDI
A simple text editor
Summary
4
Events and Signals
Events and Signals
Event management
Signals and slots
Drag and drop technique
Drawing shapes
Graphics and effects
Summary
5
Dialogs and Widgets
Dialogs and Widgets
Built-in dialogs
Custom dialogs
Widgets at a glance
Custom widget
Implementation of MDI
Summary
6
Database Handling
Database Handling
Connecting to the database
Executing SQL queries
Table and form views
Table view
Form view
Viewing relations in table views
Summary
Index
Index

Table and form views

This section is devoted to explaining the representation of data in a form view or a table view. But, before that, we can look at some examples of accessing databases through high-level model classes. The following classes are available in Qt for this purpose.

  • QSqlQueryModel: This provides a read-only data model for SQL result sets

  • QSqlTableModel: This provides an editable data model for a single database table

  • QSqlRelationalTableModel: This provides an editable data model for a single database table with foreign key support

Let's view some quick examples of each of these classes.

QSqlQueryModel

This model aims at providing a high-level interface to execute SQL queries and traverse the result set. This class is built on top of the QSqlQuery class and can be used to provide data to view classes, such as QTableView, which we are going to discuss in the forthcoming sections. A sample program using QSqlQueryModel is given as follows:

model = QSqlQueryModel()
model.setQuery(...
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