Re: [Qgis-developer] How to load a QLR file with pyQGIS ?
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 ___ Qgis-developer mailing list Qgis-developer@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 =-=-=-=-=-=-=-=-=-=-=-=-=-=-= ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
[Qgis-developer] Customized VectorLayer for ArcGIS REST API Connector
Hi Devs I am currently working on the ArcGIS REST API Connector Plugin[1] trying to find a way to use QgsVectorLayer. The webservice (callef ArcGIS Feature Service) returns valid GeoJSON and the QgsVectorLayer's datasource url can point to the service that provides this GeoJSON (this is done in the current version of the plugin). The problem is that there exists no query to retrieve all features from an ArcGIS Feature Layer at once/in one service call (if there are more than 1000 features). So my approach is the following: The feature list is populated through multiple service calls and temporarily stored/cached as GeoJSON-File. The QgsVectorLayer's datasource url points to this file. The file is repopulated occasionally on request/event. Probably the best way to achieve this would be to write a CustomVectorDataProvider that inherits from VectorDataProvider and is injected into the VectorLayer. But I didn't find a way to do this with PyQGIS. I then tried to use a QgsPluginLayer as an adapter to a QgsVectorLayer. The CustomPluginLayer would hold a reference to an instance of VectorLayer and delegates all the functionality of a VectorLayer to this instance. This would allow the (re)population of the local GeoJSON file, when the layer is loaded or refreshed. But I didn't find a way to achieve this. 1. What actions are possibly needed to (re)connect? 2. Or are there methods/structures missing in the Python API wrapper to QGIS C++ API? 3. Is there a good overview/doc over the activities/instances involved when an VectorLayer is added to a map by calling QgsMapLayerRegistry.instance().addMapLayer(layer) or alternatively when a VectorLayer is created/added through iface.addVectorLayer? Any input/ideas would be very much appreciated. Kind regards Carmelo Schumacher [1] http://giswiki.hsr.ch/QGIS_ArcGIS_REST_API_Connector_Plugin http://giswiki.hsr.ch/QGIS_ArcGIS_REST_API_Connector_Plugin Carmelo Schumacher Institut für Software (IFS) Hochschule für Technik Rapperswil Oberseestrasse 10, 8640 Rapperswil, CH___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
Re: [Qgis-developer] Project on DB
Il 14/04/2015 21:44, Régis Haubourg ha scritto: Hmm, interesting idea. By now, I could deal with it with profile QGIS2.ini fine tuning. User settings also concerns all that is stored in .qgis profile (settings, GUIncustomization, processing conf and use models). What you suggest implies that QGIS can authenticate itself and register to a DB. We would need then to add some LDAP or CAS to QGIS. I'm thinking to an option, similar to --configpath, so that qgis starts authenticating itself against an existing DB, using the authentication from the system (e.g. Active Directory, etc.). I remember Larry was working on related topics. Right; Larry, what is the current state of art? Another point, I guess that we should before conclude on a long running topic, the one about refactoring qgs file so that it can store additional resources such as data stored along the project, svg resources, scripts. This would hep defining what is a full profile and what is exactly a project file. This is nice, but it can evolve in parallel: once the double option (.qgs and db) is in place, any additional info can be added to both. All the best. -- Paolo Cavallini - www.faunalia.eu QGIS PostGIS courses: http://www.faunalia.eu/training.html ___ Qgis-developer mailing list Qgis-developer@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-developer
