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

Implementing a data source


For most usages of the grid control, your application must define a custom data source to provide the data on demand when the grid requests to display it. The use of a data source allows virtualizing data storage to prevent duplicating the storage of data in both the control and the backing data field. In this recipe, we will take a look at how to create a custom PyGridTableBase to use as a data source for grid.

How to do it…

Perform the following steps:

  1. First, in this recipe, we will retrieve backing data from the GitHub API, so we need to import a few extra modules from the Python standard library. We will do this as follows:

    import urllib
    import json
    import wx
    import wx.grid as gridlib
  2. Let's start by defining the custom PyGridTableBase class to provide data to the grid:

    class MyDataSource(gridlib.PyGridTableBase):
        def __init__(self):
            super(MyDataSource, self).__init__()
            
            # Github change history for wxPython
            self._RetrieveData()...