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<p>Hi Andrea,<br>
</p>
<p>could you make the groovy part write a file or to a database that
you have your students load as layer in QGIS and which will
refresh from its source automatically on map canvas interaction?
That might be a hacky but sufficient solution if I understand your
goal correctly. If you write to a WKT file for example and load
that in QGIS in watch mode, QGIS will automatically notice chances
and refresh it without any interaction necessary (at least on
Linux)!</p>
Otherwise it is very well be possible to implement a "pipe" into
QGIS / API for QGIS using various techniques (maybe even expose
iface and some nasty "exec"ing :D ). E. g. check out
<a class="moz-txt-link-freetext" href="https://github.com/gem/oq-irmt-qgis/tree/qgis3-socketserver">https://github.com/gem/oq-irmt-qgis/tree/qgis3-socketserver</a> which
uses websockets.
<p>Cheers, Hannes<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Am 10.09.21 um 14:38 schrieb andrea
antonello:<br>
</div>
<blockquote type="cite"
cite="mid:CACck5jNJkFz5Vn62YL9GYu1ZY9ODSZNGxR86PGPdKrhiw-5UsQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div>Hi Richard,</div>
<div><br>
</div>
<div class="gmail_quote">
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">> I guess you mean
QGIS Desktop, right? AFAIK the only option is to use its
Python API, which requires all the PyQGIS <<a
href="https://docs.qgis.org/3.16/en/docs/pyqgis_developer_cookbook/index.html"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://docs.qgis.org/3.16/en/docs/pyqgis_developer_cookbook/index.html</a>>
and binary libs to be available inside the environment.<br>
<br>
Just curious: but would it be possible to 'attach' your
script to a running/visible instance of QGIS?<br>
<br>
From: <a
href="https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/intro.html#python-applications"
rel="noreferrer" target="_blank" moz-do-not-send="true">https://docs.qgis.org/testing/en/docs/pyqgis_developer_cookbook/intro.html#python-applications</a><br>
<br>
So: I start QGIS, and then from some python console (NOT the
internal one), I can try to load (and show!) a shapefile in
current mapcanvas? Or pan/zoom? That would be cool for
demonstrations...<br>
</blockquote>
<div><br>
</div>
<div>I have to apologize and give a little context. I teach
geographic scripting at a local university. Students come
from the previous geomatics course with Arc. </div>
<div>Since I have no intention to teach Arc scripting, I have
been doing it for several years now happily using a
scripting environment based on Geoscript Groovy [1].</div>
<div>So we are talking about a completely different
programming language. </div>
<div>In the last year I have been able to pull some of them
over to QGIS, but the traction is low. So I was hoping to be
able to attach to some APi to load results into a running
QGIS instance. That would be really cool, surely
convince them and I would have been able to develop the
geoscript part necessary to my environment.</div>
<div><br>
</div>
<div>In the meanwhile I read Gio's comment: "Another option
could be run a "micro server" inside a pyqgis plugin and
serve an ad-hoc API from it :)"</div>
<div><br>
</div>
<div>Yes, that would have been my dream :-) </div>
<div><br>
</div>
<div>Thanks for your comments.</div>
<div><br>
</div>
<div>Andrea</div>
<div><br>
</div>
<div><br>
</div>
<div>[1] <a
href="https://jericks.github.io/geoscript-groovy-cookbook"
moz-do-not-send="true">https://jericks.github.io/geoscript-groovy-cookbook</a></div>
<div> </div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<br>
Regards,<br>
<br>
Richard Duivenvoorde<br>
<br>
<br>
</blockquote>
</div>
</div>
<br>
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