[Qgis-developer] Use Georeferencer Core-Plugin with python
Felix Schmidt
felix.schmidt at uni-weimar.de
Mon May 19 13:07:13 PDT 2014
Thanks a lot for the support,
i will read your commit and talk to my team mates on Wednesday.
Felix
Am 19.05.2014 21:09, schrieb Matthias Kuhn:
> A pull request is online for review:
>
> https://github.com/qgis/QGIS/pull/1370
>
> Please post your comments there if you are interested in this
> functionality.
>
> On Mon 19 Mai 2014 18:55:54 CEST, G. Allegri wrote:
>> Of course Matthias is right if you want to interface with a plugin
>> instance running inside QGIS. That's why I said you could bind only
>> the inner logic of the Georeferencer to use it "outside" the plugin
>> instance. In case you need to control, or get work done from, the
>> Georeferencer plugin itself you have to do what Matthias is doing in
>> its commit.
>>
>> giovanni
>>
>>
>> 2014-05-19 18:33 GMT+02:00 Matthias Kuhn <matthias.kuhn at gmx.ch
>> <mailto:matthias.kuhn at gmx.ch>>:
>>
>> The python modules gui and core are exported and the "iface"
>> variable (QgisInterface) knows about their presence. But
>> QgisInterface should not have any dependencies on plugin code,
>> therefore it's harder to access this code.
>> It may not be hard if you only make use of code which you use in a
>> standalone library way (maybe that would already be enough for
>> your case). If you want to get access to a running plugin instance
>> this is a different story. You can have a look at the code in [1]
>> for an example of how this might be accomplished. Although the
>> code seems not to be working, I've got to check what's still
>> missing there, but in principle the ideas in commit [1] should work.
>>
>> Best,
>> Matthias
>>
>> [1]
>> https://github.com/m-kuhn/__QGIS/commit/__571b4fa7e6afcefb9c4911339db2c4__b7689ce6a9
>> <https://github.com/m-kuhn/QGIS/commit/571b4fa7e6afcefb9c4911339db2c4b7689ce6a9>
>>
>>
>>
>> On Mon 19 May 2014 05:34:41 PM CEST, Felix Schmidt wrote:
>>
>> @Matthias: what do you mean with:
>> Am 19.05.2014 16:41, schrieb Matthias Kuhn: "the code is not
>> exported
>> to the gui or core libraries/sip modules"?
>>
>> It will not be so easy to just write wrappers because the
>> code is not
>> exported to the gui or core libraries/sip modules.
>> I have written code that makes it possible to generate python
>> bindings for (C++) plugins and I'm considering creating a
>> pull-request for it.
>>
>> Matthias
>>
>>
>> On 05/19/2014 04:33 PM, G. Allegri wrote:
>>
>> It depends on what parts of the Georeferencer you
>> need. If you don't
>> need the GUI but only the math, you could consider
>> writing a SIP
>> wrapper around QgsGeorefTransformInterface
>> implementations [1].
>> Otherwise, if Python performance would suffice, you
>> could grab the
>> low level math from QgsGeorefTransform and
>> QgsLeastSquares [2] and
>> translate it to Python.
>>
>> giovanni
>>
>> [1]
>> https://github.com/qgis/QGIS/__blob/master/src/plugins/__georeferencer/__qgsgeoreftransform.cpp
>> <https://github.com/qgis/QGIS/blob/master/src/plugins/georeferencer/qgsgeoreftransform.cpp>
>> [2]
>> https://github.com/qgis/QGIS/__blob/master/src/plugins/__georeferencer/qgsleastsquares.__cpp
>> <https://github.com/qgis/QGIS/blob/master/src/plugins/georeferencer/qgsleastsquares.cpp>
>>
>>
>>
>> 2014-05-19 16:32 GMT+02:00 G. Allegri
>> <giohappy at gmail.com <mailto:giohappy at gmail.com>
>> <mailto:giohappy at gmail.com <mailto:giohappy at gmail.com>>>:
>>
>>
>> It depends on what parts of the Georeferencer you
>> need. If you
>> don't need the GUI but only the math, you could
>> consider writing
>> a SIP wrapper around QgsGeorefTransformInterface
>> implementations
>> [1].
>> Otherwise, if Python performance would suffice,
>> you could grab
>> the low level math from QgsGeorefTransform and
>> QgsLeastSquares
>> [2] and translate it to Python.
>>
>> giovanni
>>
>> [1]
>>
>> https://github.com/qgis/QGIS/__blob/master/src/plugins/__georeferencer/__qgsgeoreftransform.cpp
>> <https://github.com/qgis/QGIS/blob/master/src/plugins/georeferencer/qgsgeoreftransform.cpp>
>> [2]
>>
>> https://github.com/qgis/QGIS/__blob/master/src/plugins/__georeferencer/qgsleastsquares.__cpp
>> <https://github.com/qgis/QGIS/blob/master/src/plugins/georeferencer/qgsleastsquares.cpp>
>>
>>
>> 2014-05-19 16:10 GMT+02:00 Felix Schmidt
>> <felix.schmidt at uni-weimar.de
>> <mailto:felix.schmidt at uni-weimar.de>
>> <mailto:felix.schmidt at uni-__weimar.de
>> <mailto:felix.schmidt at uni-weimar.de>>>:
>>
>>
>> Hello Giovanni,
>> thanks for your answer. Do you think it is
>> easier to write
>> the Plugin for the historical border
>> extraction in c++
>> instead of python, cause of the binding
>> implementation?
>>
>> Felix
>>
>> Am 19.05.2014 14:52, schrieb G. Allegri:
>>
>> Hi Felix,
>> I fear you will have to write your own
>> bindings if you
>> want to leavarage the Georeferencer plugin
>> code. It's a
>> plugin, so it's functionality isn't
>> exposed through QGIS
>> API.
>>
>>
>>
>>
>>
>> --
>> Giovanni Allegri
>> http://about.me/__giovanniallegri
>> <http://about.me/giovanniallegri>
>> Twitter: https://twitter.com/_giohappy_
>> blog: http://blog.spaziogis.it
>> GEO+ geomatica in Italia http://bit.ly/GEOplus
>>
>>
>>
>>
>> --
>> Giovanni Allegri
>> http://about.me/__giovanniallegri
>> <http://about.me/giovanniallegri>
>> Twitter: https://twitter.com/_giohappy_
>> blog: http://blog.spaziogis.it
>> GEO+ geomatica in Italia http://bit.ly/GEOplus
>>
>>
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>>
>>
>> --
>> Giovanni Allegri
>> http://about.me/giovanniallegri
>> Twitter: https://twitter.com/_giohappy_
>> blog: http://blog.spaziogis.it
>> GEO+ geomatica in Italia http://bit.ly/GEOplus
>
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