[Ottawa_users] Buidling Plugins in QGIS

[richard burcher]

This is fantastic Dave. Please see my thoughts/ideas below within your
email. I've been looking at QGIS plugin dev for a bit but now with my work
and our discussions here I am very excited to get going on it.

On 27 January 2012 13:13, Sampson, David <David.Sampson at nrcan-rncan.gc.ca>wrote:

> Warning, brain dump ahead. Perhaps we have a couple of starting points.
>
> 1. What do we want to cover in such a tutorial
> Some ideas include
> * Resources for building plugins
>
i think this is the starting point to consolidate resources in one place.
further to your point below about moodle, it would be great to have an area
to store/organize these resources.

> * Choosing a language (Python should be easy, Native plguins are C and
> out of scope of my knowledge base)
>
python would be the easiest. i do not know c either. might be a topic for
another time but putting some resources together around spatial
processing/programming with python using foss modules might interest
broader community.

> * Creating the appropriate directory structure
> * Creating the GUI
>        * Using QT toolkit
>        * separating logic from UI
>        * building interfaces
>        * using QT Builder
> * Licensing issues
>
i would like to see a talk about the various types at some point. i think
this is of critical importance so that users and developers know their
rights. i would certainly be up for putting together a document covering
this.

>        * python license
>        * QT License
>        * Then your own if possible
> * Classic "HELLO WORLD" plugin
>
perhaps the "hello plugin" could be a two part; load vector (prob
shapefile) & raster (geotiff) that generates some stats/summary output to
text file?

> * Configuration file
> * Packaging and distribution of plugin
> (http://hub.qgis.org/projects/quantum-gis/wiki/Python_Plugin_Repositorie
> s)
> * target audience
>
mmmm this is a tough one, my initial thoughts (correct me if you think
other wise) is to target those (myself included) that want to understand
the entire process of plugin development to develop a framework for
experimentation and further exploration.

> * related materials, resources and tutorials
>
it would be great to have a video walk through, perhaps short 5-10min vid?
Andrew R, would this be something that if existed in video that could be
posted on fosslc?

>
> 2. What type of plugin might we want to create
> Some ideas:
> * consuming data from a pupolar API like Googel Fusion Tables
>
ive got a december dump of the octranspo gtfs data on fusion tables. this
would be pretty cool to consume.

> * Consuming data from RESTful ATOM based API
> * Updating an older plugin VS creating something new
> * Some specific use cases or user stories might help (KEEP IT SIMPLE)
>
from my work it would be great to generate some basic raster derivatives
i.e. slope, aspect, twi for a dem & place into a stacked geotiff

>
> 3. What if the final output
> * a PDF, a web page or maybe a moddle based resource
> (http://moodle.org/). It would be great for OSGEO to host a moodle site
> and the community collaborates on contributing tutorials
>
agreed. this would really help facilitate community involvement

> * keeping tutorial up to date is a challenge (ask Scott).
>
certainly not the easiest but always great that people want to pass along
what they know and help others learn:)

>
> 4. I can provide SVN access to the plugin project I set up if I can find
> the password. Versioning the code will be benificial to illustrate the
> steps.
>
hopefully you can find the password.

>
> Thouhgts?
>
>
> -----Original Message-----
> From: ottawa_users-bounces at lists.osgeo.org
> [mailto:ottawa_users-bounces at lists.osgeo.org] On Behalf Of Regie Alam
> Sent: January 27, 2012 12:19
> To: Ottawa (Canada) Local Chapter List
> Subject: Re: [Ottawa_users] Recap of last weeks meetup
>
>
>   I am interested in this as well. I can definitely help
> compiling/organizing some sort of documentations/guide. I believe there
> are some documentations from the QGIS website but I think it would be
> better if those notes come from actual use cases.
>
>   I learned that from delving into raster suport for PostGIS. There are
> so many documentations scattered all over the web that it takes a while
> to compile the ones that actually work.
>
>   This was actually brought up because an organization was soliciting
> for interest in a regular (introductory) QGIS workshop. We thought it
> would be better to have a workshop on how to create plugins instead.
>
> Regie
>
>
>
>
>
> On 1/27/12, richard burcher <drownedfrog at gmail.com> wrote:
> > Thanks David,
> >
> > Thanks for posting, some really great stuff. I am very interested to
> > head down this road and would like to work together to get something
> > going. I'm certain others would join along in this.
> >
> > Cheers
> >
> > On 25 January 2012 09:09, Sampson, David
> > <David.Sampson at nrcan-rncan.gc.ca>wrote:
> >
> >> **
> >> I can help advise on creating QGIS plugins. I created a GeoRSS and
> >> CSW plugin a couple of years back and demo'd for local OSGEO group.
> >> They are probably broken now requiring version upgrades. By no means
> >> am I a pro but I went through the hard knocks.
> >>
> >> The plugins were both done in python (2.x) and using QT library. As I
>
> >> am now using python 3.x for all new python projects (where possible)
> >> I wonder if QGIS can use python 3 now, it has been a while
> >>
> >> Community Plugin Project page here:
> >>
> >> http://sourceforge.net/projects/qgiscommunitypl/
> >>
> >>
> >> So I can help someone put some material together however between
> >> work, running a ski school (http://freeheelers.net/) and a community
> >> non profit
> >> (http://computersforcommunities.ca/c4c/) I have no spare cycles to
> >> put together a quality tutorial.
> >>
> >> Let me know if you want to venture down this route and we can work
> >> together. I have a couple of pending QGIS plugin projects in my brain
>
> >> I might be able to collaborate on.
> >>
> >> Cheers
> >>
> >>  ------------------------------
> >> *From:* ottawa_users-bounces at lists.osgeo.org [mailto:
> >> ottawa_users-bounces at lists.osgeo.org] *On Behalf Of *richard burcher
> >> *Sent:* January 24, 2012 20:24
> >> *To:* ottawa_users_list_osgeo
> >> *Subject:* [Ottawa_users] Recap of last weeks meetup
> >>
> >>  Apologies for not getting to this sooner. I have been quite busy
> >> with my new project work.
> >>
> >> I want to first thank all those that attended. We had a great turn
> >> out and hope to see many more people next time:)
> >>
> >> Just want to give a quick overview (if I've forgotten anything please
>
> >> add to the list) for the folks who could not attend of what was
> >> discussed, covered and bantered around the table:
> >>
> >> - Some pictures courtesy of Andrew's very slick Android phone will be
>
> >> hitting the wiki page in the near future. Would like to get some
> >> newer media up there.
> >>
> >> - On Andrews phone, he mentioned an incredible multi-day battery
> >> life, installed upgraded battery. Would like to know were he got this
> from.
> >>
> >> - I gave a half-successful overview of my initial forays into using
> >> PostGIS raster and some R raster modules for visualization.Live demos
>
> >> always seem to never work.
> >>
> >> - Questions raised about the FOSS4G-NA (North American) conference.
> >> Which we know is April 10 to 12 in Washington DC.
> http://foss4g-na.org/about/.
> >> There is only ~300 spots open. Sign up and hope to see you there!
> >>
> >> - Scott offered use of his GIS lab, which is great. Thanks!. So
> >> hopefully down the road we can make use of that facility for some
> hands on stuff.
> >>
> >> - There was interest in getting some intro walk throughs around the
> >> QGIS application & a bit more advanced usage in building a Python
> >> plugin. Would anyone be interested in a short ~2-3hr intro and/or an
> >> intro to build a simple plugin? If so let me know and we can pursue
> further with the list.
> >>
> >> - I put forth the idea of looking into changing the current meet up
> >> venue (Fox & Feather) & putting it to the group to decide. Scott was
> >> saying this has been looked into in the past and the feedback from
> >> the group was that the venue is not that bad. Through it would be
> >> nice to have WiFi. I have not had time to look into this at moment
> >> due to a recent family injury. I will keep you posted on this.
> >>
> >> - I put the idea out of a monthly weekend coffee get together to drop
>
> >> by and talk geo. I hope to announce the first one next month.
> >>
> >> If I have forgotten or missed anything, please add it to the list.
> >>
> >> Have a great night folks.
> >>
> >> Cheers,
> >>
> >> Richard
> >>
> >> _______________________________________________
> >> Ottawa_users mailing list
> >> Ottawa_users at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/ottawa_users
> >>
> >>
> >
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