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QGIS Python Programming Cookbook, Second Edition

You're reading from   QGIS Python Programming Cookbook, Second Edition Automating geospatial development

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Product type Paperback
Published in Mar 2017
Publisher Packt
ISBN-13 9781787124837
Length 464 pages
Edition 2nd Edition
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Author (1):
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Joel Lawhead Joel Lawhead
Author Profile Icon Joel Lawhead
Joel Lawhead
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Table of Contents (10) Chapters Close

Preface 1. Automating QGIS FREE CHAPTER 2. Querying Vector Data 3. Editing Vector Data 4. Using Raster Data 5. Creating Dynamic Maps 6. Composing Static Maps 7. Interacting with the User 8. QGIS Workflows 9. Other Tips and Tricks

Stepping the user through a wizard

A wizard is a series of dialogs that lead the user through a sequence of steps. The information on each page of a wizard might relate in some way to the information on other pages. In this recipe, we'll create a simple three-page wizard to collect some information from the user and display it back to them.

Getting ready

Open the QGIS Python console by selecting the Plugins menu and then clicking on Python Console.

How to do it...

We will create three classes, each representing a page of our wizard. The first two pages will collect information, and the third page will display it back to the user. We will create a QWizard object to tie the page classes together. We will also use the concept of wizard fields to pass information among the pages. To do this, we need to perform the following steps:

  1. First, we import the GUI and QGIS core libraries:
            from PyQt4.QtCore import * 
            from PyQt4.QtGui import * 
    
  2. Next, we create the class for the first page...
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