PyQGIS

Develop your QGIS plugin

Licencia (CC BY-SA 3.0)

III QGIS User Conference
7 August 2017 - Nødebo

Luigi Pirelli

luipir@gmail.com

~~lpirelli@boundlessgeo.com~~

@Ginetto

http://slides.com/luigipirelli/developqgisplugins-nodebo2017

Who am I

15 years working on Satellite Ground Segments for

Landsat, Cryosat, MODIS, Sentinel...

Since 2006 in QGIS/GRASS

QGIS Plugin y Core developer

Since 2015 part of Boundless Desktop Team

Commercial solution base on QGIS (and more)

Founder of GFOSS.it

Italian OSGEO Local Chapter

Coautor of "Mastering QGIS"

https://www.packtpub.com/big-data-and-business-intelligence/mastering-qgis-second-edition

Reviewer

QGIS Python Programming Cookbook

https://www.packtpub.com/application-development/qgis-python-programming-cookbook

More PyQGIS books

Beginner

Advanced

http://qgis.org/es/site/

Download

http://qgis.org/es/site/forusers/download.html

docker pull kartoza/qgis-desktop

docker pull kartoza/qgis-server

Example data: http://qgis.org/downloads/data/

QGIS

Free as Freedom - mainly GPL2

Open - Anyone can participate

Trasparent - PSC coordination list is also open

How to Participate

Issues - http://hub.qgis.org/issues

Helps - In ML o en freenode #qgis channel

Bug fix: https://github.com/qgis/QGIS/pulls

Translates - http://qgis.org/en/site/getinvolved/translate.html

other languages e.g QGIS-es: http://lists.osgeo.org/cgi-bin/mailman/listinfo/qgis-es

but best part is particpating to...

HACKMEETING

every 6 months

When your user group?

Having right vote on using QGIS funds... and more

QGIS is wrote in:

C++ (almos all)

Python (some core plugins)

Javascript (some parts in Plugin Manager)

www.openhub.net/p/qgis

C++ - http://qgis.org/api/

Python - http://qgis-python.kartoza.com/docs/

http://geoapis.sourcepole.com/qgispyapi/

https://webgeodatavore.github.io/pyqgis-samples/

Lenguages

Ask and give online help

Mailing lists
- Devs: lists.osgeo.org/mailman/listinfo/qgis-developer
- Users: lists.osgeo.org/mailman/listinfo/qgis-user
IRC
- #qgis on www.freenode.net
- WebIRC: webchat.freenode.net/?channels=#qgis
- Gitter: https://gitter.im/qgis/QGIS
StackExchange
- http://gis.stackexchange.com/?tags=qgis

Ask help to the QGIS

The core Python console

IPython Console plugin

by A.Pasotti

Exploring commands
- help(...)
- dir(...)
To test command
To test code

Help each other

>>>> https://goo.gl/GdaqY8 <<<<

Ice break

coding in python console

Plugins

95% of C++ API can be accessed by Python thanks to SIP wrappers

https://wiki.python.org/moin/SIP

PyQGIS Cookbook

http://docs.qgis.org/2.18/en/docs/pyqgis_developer_cookbook/

http://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/

The better school is to install end read plugins code

Let's build a plugin

with QGIS Plugin Builder (versión 2.16)

What we need

Python editor (vi, Atom, Eric4, Eclipse, PyCharm,...)
Optional: if we need Graphical User Interface (GUI)
- *.ui file editors (Qt Creator, Qt Designer)
- Resource builder pyrcc4 (pyqt4-dev-tools)
Optional:
- project builder "make" (build-essential)