Book Image

wxPython Application Development Cookbook

By : Cody Precord
Book Image

wxPython Application Development Cookbook

By: Cody Precord

Overview of this book

wxPython is a GUI toolkit for the Python programming language built on top of the cross-platform wxWidgets GUI libraries. wxPython provides a powerful set of tools that allow you to quickly and efficiently building applications that can run on a variety of different platforms. Since wxWidgets provides a wrapper around each platform’s native GUI toolkit, the applications built with wxPython will have a native look and feel wherever they are deployed. This book will provide you with the skills to build highly functional and native looking user interfaces for Python applications on multiple operating system environments. By working through the recipes, you will gain insights into and exposure to creating applications using wxPython. With a wide range of topics covered in the book, there are recipes to get the most basic of beginners started in GUI programming as well as tips to help experienced users get more out of their applications. The recipes will take you from the most basic application constructs all the way through to the deployment of complete applications.
Table of Contents (17 chapters)
wxPython Application Development Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Processing key events


The KeyEvent events are generated in any control that accepts keyboard input when a user presses keys on a keyboard. There are three distinct events that occur for a single key press. In this recipe, we will use KeyEvents to create a custom TextCtrl control that can generate a dynamic input suggestion list similar to the suggestions that Google shows when one types into the search box.

How to do it…

You need to do the following:

  1. Firstly, for this recipe, we need to include a couple of other modules from the Python standard library, as follows:

    from urllib import urlopen
    import re
    
    from abc import ABCMeta, abstractmethod
    import wx
  2. To make the control's suggestion provider extensible, we will first define a simple interface class that will be responsible for providing suggestion options. This is defined as an abstract base class:

    class CompleterDataSource:
        __metaclass__ = ABCMeta
        
        @abstractmethod
        def getSuggestions(self, phrase):
            """return list of strings...