python – North Road

Posted on March 9, 2018January 4, 2021QGIS

Implementing an in-house “New Project Wizard” for QGIS

Recently, we were required to implement a custom “New Project Wizard” for use in a client’s internal QGIS installation. The goal here was that users would be required to fill out certain metadata fields whenever they created a new QGIS project. Fortunately, the PyQGIS (and underlying Qt) libraries makes this possibly, and relatively straightforward to do. Qt has a powerful API for creating multi-page “wizard” type dialogs, via the QWizard and QWizardPage classes. Let’s have a quick look at writing a custom wizard using these classes, and finally we’ll hook it into the QGIS interface using some PyQGIS magic. We’ll start super simple, creating a single page wizard with no settings. To do this we first create a Page1 subclass […]

Posted on July 25, 2016January 4, 20213 CommentsQGIS

The road to QGIS 3.0 – part 1

As we discussed in QGIS 3 is under way, the QGIS project is working toward the next major version of the application and these developments have major impact on any custom scripts or plugins you’ve developed for QGIS. We’re now just over a week into this work, and already there’s been tons of API breaking changes landing the code base. In this post we’ll explore some of these changes, what’s motivated them, and what they mean for your scripts. The best source for keeping track of these breaking changes is to watch the API break documentation on GitHub. This file is updated whenever a change lands which potentially breaks plugins/scripts, and will eventually become a low-level guide to porting plugins to […]

Posted on July 11, 2016January 4, 20212 CommentsQGIS

QGIS 3 is underway – what does it mean for your plugins and scripts?

With the imminent release of QGIS 2.16, the development attention has now shifted to the next scheduled release – QGIS 3.0! If you haven’t been following the discussion surrounding this I’m going to try and summarise what exactly 3.0 means and how it will impact any scripts or plugins you’ve developed for QGIS. QGIS 3.0 is the first major QGIS release since 2.0 was released way back in September 2013. Since that release so much has changed in QGIS… a quick glance over the release notes for 2.14 shows that even for this single point release there’s been hundreds of changes. Despite this, for all 2.x releases the PyQGIS API has remained stable, and a plugin or script which was […]