[Qgis-developer] How to load a QLR file with pyQGIS ?

[Gary Sherman]

On 4/15/15 10:55 PM, Nathan Woodrow wrote:
> Hey,
>
> QLR files are not style files  they can't be loaded like that.

OH :) My brain read QML...

> Unfortunately the API for loading a QLR is broken in 2.8.1 but will be
> fixed in 2.8.2, however the logic isn't very complex and you can
> translate it to Python from C++.  The source is here
> https://github.com/qgis/QGIS/blob/master/src/core/qgslayerdefinition.cpp#L36.
>
> If you don't need to support loading groups from the QLR you can use this:
>
> QList<QgsMapLayer*> layers = QgsMapLayer::fromLayerDefinition( doc );
> QgsMapLayerRegistry::instance()->addMapLayers( layers, True);
>
> - Nathan
>
>
> On Thu, 16 Apr 2015 at 16:51 Geo DrinX <geodrinx at gmail.com
> <mailto:geodrinx at gmail.com>> wrote:
>
>     Very strange   :(
>
>     I inserted also the    triggerRepaint()   but nothing changes.
>
>     This is my sourcecode:
>
>     https://github.com/geodrinx/smartroadsense/blob/master/smartroadsense.py
>
>
>     If I drag and drop in  QGIS  my  "srs_data.qlr"   file, it works.
>
>     Instead, from python code, the style is not applied.
>
>     Could be because my data file is a CSV?
>
>
>     2015-04-15 18:39 GMT+02:00 Gary Sherman <gsherman at geoapt.com
>     <mailto:gsherman at geoapt.com>>:
>
>         On 4/15/15 2:24 AM, Geo DrinX wrote:
>
>             Hello,
>
>
>             there is a way to load a QLR file with  pyQGIS ?
>
>             I tried using      vlayer.loadNamedStyle(__qlrFileName)
>             but it seems
>             not to work.
>
>
>             What is the correct way ?
>
>         That is the correct way. Have you done the following after
>         applying the style?:
>
>         vlayer.triggerRepaint()
>
>         You can test the result of applying the style using:
>
>         result = vlayer.loadNamedStyle(__qlrFileName)
>
>         If result if False, the style was not loaded/applied.
>
>         -gary
>
>
>             Thank you
>
>             Roberto
>
>
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>
>         --
>         =-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>         Gary Sherman
>
>         Founder, QGIS Project
>         Consulting: geoapt.com <http://geoapt.com>
>         Publishing: locatepress.com <http://locatepress.com>
>
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-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Gary Sherman

Founder, QGIS Project
Consulting: geoapt.com
Publishing: locatepress.com

We work virtually anywhere
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=