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QGIS By Example

You're reading from   QGIS By Example Leverage the power of QGIS in real-world applications to become a powerful user in cartography and GIS analysis

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781782174677
Length 316 pages
Edition 1st Edition
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Toc

Table of Contents (12) Chapters Close

Preface 1. Handling Your Data FREE CHAPTER 2. Visualizing and Styling the Data 3. Presenting Data on a Print Map 4. Publishing the Map Online 5. Answering Questions with Density Analysis 6. Answering Questions with Visibility Analysis 7. Answering Questions with Suitability Analysis 8. Automating Analysis with Processing Models 9. Automating Analysis with Processing Scripts 10. Developing a Python Plugin – Select by Radius Index

Using Designer UI files in the plugin


Designing the GUI with the Qt Designer is the first part of the process. Now we need to use the previously created .ui files to construct our dialogs and implement the logic required for handling user actions, such as clicking on buttons, selecting items from lists, and so on.

Adding the About dialog to the plugin

We will start from the About dialog, as it is simple. To keep the plugin directory structure clean, we will store all the sources related to the plugin GUI in the gui subdirectory inside the plugin directory.

Open your text editor and create a new file with the following content:

( 1) import os
( 2) import ConfigParser
( 3)
( 4) from PyQt4 import uic
( 5) from PyQt4.QtCore import QUrl
( 6) from PyQt4.QtGui import QTextDocument, QDialogButtonBox, QPixmap
( 7)
( 8) pluginPath = os.path.split(os.path.dirname(__file__))[0]
( 9) WIDGET, BASE = uic.loadUiType(
(10)    os.path.join(pluginPath, 'ui', 'aboutdialogbase.ui'))
(11)
(12)
(13) class AboutDialog...
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