[Qgis-user] Python error using OpenLayers plugin, problem with mapRenderer

[Larry Shaffer]

Hi Joshua,

On Sun, Mar 2, 2014 at 11:35 AM, Joshua Arnott <josh at snorfalorpagus.net>wrote:

>
> Hello,
>
> I'm getting the error below when I try to add a layer from the OpenLayers
> plugin.
>
> I think this is the same issue as here:
> http://lists.osgeo.org/pipermail/qgis-developer/2013-December/029682.html
>
> I'm using a version of QGIS I compiled myself (33a8b63) on OpenSUSE 12.3
> (32-bit). I've not had problems using this previously.
>
> The error seems to be coming from the mapRenderer function, as I get the
> same if I try to enter "iface.mapCanvas().mapRenderer()" in the Python
> console.
>

You are using the current 2.3-dev version, which includes the new
multi-threaded renderer. The OpenLayers plugin evidently has not been
updated to work with the new renderer setup. Please create a new issue
ticket on the plugin's tracker [0].

On Mac, using latest 2.3-dev, I actually get a segfault, but that is due (I
think) to the excessive log output crashing the app.

Debug output in Terminal (please add to ticket):

OpenlayersLayer draw
Warning: QPixmap: It is not safe to use pixmaps outside the GUI thread
src/core/qgsmessagelog.cpp: 45: (logMessage) 2014-03-02T18:25:20 Qt[1]
QPixmap: It is not safe to use pixmaps outside the GUI thread
Segmentation fault: 11

If you really need the OpenLayers plugin, try dropping back to the latest
release version, QGIS 2.2.


Regards,

Larry Shaffer
Dakota Cartography
Black Hills, South Dakota


> I have tried recompiling, but there is no change. Other than this QGIS
> functions as expected.
>
> Josh
>
> An error has occured while executing Python code:
>>
>> Traceback (most recent call last):
>>   File
>> "/home/snorf/.qgis2/python/plugins/openlayers_plugin/openlayers_plugin.py",
>> line 50, in addLayer
>>     self.__plugin.addLayer(self)
>>   File
>> "/home/snorf/.qgis2/python/plugins/openlayers_plugin/openlayers_plugin.py",
>> line 202, in addLayer
>>     self.__setMapSrsGoogle()
>>   File
>> "/home/snorf/.qgis2/python/plugins/openlayers_plugin/openlayers_plugin.py",
>> line 253, in __setMapSrsGoogle
>>     mapCanvas.mapRenderer().setProjectionsEnabled(True)
>> TypeError: C++ type 'const QgsMapLayer*' is not supported as  type
>>
>> Python version:
>> 2.7.3 (default, Apr 14 2012, 08:58:41) [GCC]
>>
>>
>> QGIS version:
>> 2.3.0-Master Master, 33a8b63
>>
>> Python path: ['/home/snorf/.qgis2/python/plugins/processing',
>> '/home/snorf/apps/share/qgis/python', u'/home/snorf/.qgis2/python',
>> u'/home/snorf/.qgis2/python/plugins',
>> '/home/snorf/apps/share/qgis/python/plugins',
>> '/usr/lib/python2.7/site-packages/elementtree-1.2.7_20070827_preview-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/Sphinx-1.2b3-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/Jinja2-2.7.1-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/docutils-0.11-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/Pygments-1.6-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/MarkupSafe-0.18-py2.7-linux-i686.egg',
>> '/usr/lib/python2.7/site-packages/sphinx_intl-0.9.3-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/polib-1.0.3-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/sphinx_bootstrap_theme-0.3.2-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/colormath-1.0.8-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/webcolors-1.4-py2.7.egg',
>> '/usr/lib/python2.7/site-packages/termcolor-1.1.0-py2.7.egg',
>> '/home/snorf/apps/share/qgis/python',
>> '/home/snorf/apps/share/qgis/python/plugins', '/home/snorf',
>> '/usr/lib/python27.zip', '/usr/lib/python2.7',
>> '/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk',
>> '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload',
>> '/usr/lib/python2.7/site-packages',
>> '/usr/local/lib/python2.7/site-packages',
>> '/usr/lib/python2.7/site-packages/gst-0.10',
>> '/usr/lib/python2.7/site-packages/gtk-2.0',
>> '/usr/lib/python2.7/site-packages/setuptools-0.6c11-py2.7.egg-info',
>> '/usr/lib/python2.7/site-packages/wx-2.8-gtk2-unicode',
>> '/home/snorf/apps/share/qgis/python/plugins/fTools/tools',
>> '/home/snorf/.qgis2/python/plugins/mmqgis/forms', '~/.qgis/python']
>>
>>
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