[Qgis-developer] How to load a colour table on a raster, programmatically (in python)?

[Benoit EXIGE]

Martin,

Thanks for the answers. I will test them tomorrow.

As for QgsLegendInterface the problem was that I did not know how to  
use it correctly!

Cheers,
Benoit


On 10 Aug 2010, at 21:52, Martin Dobias <wonder.sk at gmail.com> wrote:

> On Mon, Aug 9, 2010 at 11:01 PM, Benoit de Cabissole <benoit at exigesa.com 
> > wrote:
>> Colormap is given to the raster (and into the coloramp tab in the  
>> raster
>> properties). The colour ramp attribute is also reflected in the  
>> symbology
>> tab: color map combobox set to colormap. So the raster is given the  
>> correct
>> info. So far so good. But, the legend does not refresh to show the  
>> change to
>> colormap: the raster icon and raster colour bar stay grey.
>
> Use QgsLegendInterface class to refresh the symbology:
>
> iface.legendInterface().refreshLayerSymbology(layer)
>
>
>> The main raster (the only layer in my test) does not refresh either  
>> in the
>> QGIS map canvas window. Only if I move it will it refresh and  
>> display the
>> colour map.
>
> Possibly you're using caching. Make sure to clear the cached image
> before calling triggerRepaint():
>
> layer.setCacheImage(None)
>
>> The only way to refresh the legend to the correct info seems to  
>> open the
>> raster properties box and click ok. (I've tried the  
>> QgsLegendInterface, but
>> I have problems to make it work!)
>
> What probles with QgsLegendInterface did you have?
>
>
> Regards
> Martin