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

[Nathan Woodrow]

Hey,

QLR files are not style files  they can't be loaded like that.
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> 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>:
>
>> 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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>>> Qgis-developer at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>>>
>>>
>> --
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>> Gary Sherman
>>
>> Founder, QGIS Project
>> Consulting: geoapt.com
>> Publishing: locatepress.com
>>
>> We work virtually anywhere
>> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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>
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