[Qgis-developer] error for QGIS tutorials in python - adding rasters to canvas

[Tim Sutton]

Hi Martin

Pete and I will be adding more examples into the unit tests under
tests/src/core/testqgsrasterlayer.cpp.

I'll let you know when they are updated. Ill be updating my c++ tuts
in the near future too.

Regards

Tim

2008/1/24, Martin Dobias <wonder.sk at gmail.com>:
> Hi Tim,
>
> thanks for the snippet. I've updated the examples accordingly, I've
> also kept the older version for those interested.
> http://blog.qgis.org/?q=node/59
>
> Beware - you need most recent SVN trunk since it now contains fixes to
> bindings which got broken by the recent merges.
>
> Is there any source of information how does the raster
> rendering/handling work now? I was unable to find anything and some of
> the terms are quite new to me...
>
> Bye
> Martin
>
> 2008/1/24 Tim Sutton <tim at linfiniti.com>:
> > Hi
> >
> > Yes the raster API is changed. I dont know the python stuff so well
> > but in the case of C++  you would do something like this:
> >
> > 117        mpRasterLayer->setDrawingStyle(QgsRasterLayer::SINGLE_BAND_PSEUDO_COLOR);
> > 118        mpRasterLayer->setColorShadingAlgorithm(QgsRasterLayer::PSEUDO_COLOR);
> > 119        mpRasterLayer->setContrastEnhancementAlgorithm(
> > 120               QgsContrastEnhancement::STRETCH_TO_MINMAX, false);
> >
> > You will need to translate that to python api but it should be quite
> > similar. Take a look at
> > http://svn.qgis.org/trac/browser/trunk/qgis/src/core/raster/qgsrasterlayer.h
> > for the different drawing styles and shading algorithms you can use.
> >
> > Regards
> >
> > Tim
> >
> > 2008/1/23, Martin Dobias <wonder.sk at gmail.com>:
> >
> > > 2008/1/23 volkan kepoglu <vkepoglu at gmail.com>:
> > > > downloaded QGIS tutorials in python, changed qgis_prefix and runned
> > > > 2_basic_main_window and 3_basic_labelling successfully,
> > > > but 4_adding_rasters_to_canvas gives the following error;
> > > >
> > > > vkepoglu at vkepoglu:~/qgis/tutorials/4_adding_rasters_to_canvas$ python
> > > > mainwindow.py
> > > > Traceback (most recent call last):
> > > >   File " mainwindow.py", line 76, in addLayer
> > > >     layer.setColorRampingType(QgsRasterLayer.BLUE_GREEN_RED)
> > > > AttributeError: setColorRampingType
> > >
> > > Ah, that will be caused by the recent refactoring of the raster classes.
> > > Peter / Tim - can you suggest how to change the code to make it working again?
> > >
> > > > how can ı fix?
> > > > or the most important than to fix this,
> > > > how can ı learn to qgis bindings to python.
> > > >
> > > > where should ı look for reference of python bindings
> > > >
> > > > http://wiki.qgis.org/qgiswiki/PythonBindings, is there any other references?
> > >
> > > Today I've updated PythonBindings wiki page with some resources
> > > (listed in top part in Using PyQGIS section). Basically it's good to
> > > look at QGIS C++ API reference, QGIS blog, tutorials ported to Python
> > > and QGIS plugins that have been done already. (all links listed there)
> > >
> > > Martin
> > > _______________________________________________
> > > Qgis-developer mailing list
> > > Qgis-developer at lists.qgis.org
> > > http://lists.qgis.org/cgi-bin/mailman/listinfo/qgis-developer
> > >
> >
> >
> > --
> > Tim Sutton
> > QGIS Project Steering Committee Member - Release  Manager
> > Visit http://qgis.org for a great open source GIS
> > openModeller Desktop Developer
> > Visit http://openModeller.sf.net for a great open source ecological
> > niche modelling tool
> > Home Page: http://tim.linfiniti.com
> > Skype: timlinux
> > Irc: timlinux on #qgis at freenode.net
> >
>


-- 
Tim Sutton
QGIS Project Steering Committee Member - Release  Manager
Visit http://qgis.org for a great open source GIS
openModeller Desktop Developer
Visit http://openModeller.sf.net for a great open source ecological
niche modelling tool
Home Page: http://tim.linfiniti.com
Skype: timlinux
Irc: timlinux on #qgis at freenode.net