[gdal-dev] Callbacks for next-gen Python bindings

[Howard Butler]

All,

I have just committed rudimentary typemaps and support code for Python  
function callbacks and the generic GDAL TermProgress methods in the  
next-gen interface files.  This was one of the last major pieces of  
missing functionality that existed in the old-gen bindings that was  
preventing us from porting over a number of scripts in ./pymod.

Additionally, I have created a new interface file, Operations.i, and  
placed GDAL raster operations like ComputeMedianCutPCT, DitherRGB2PCT,  
and ReprojectImage in this file to de-bulk gdal.i, which was getting a  
little bit bloated after adding in the new methods.

I would like to request making a change to Driver.CreateCopy.  It is  
currently missing arguments for callback and callback_data, which  
existed in the old-gen bindings.  I propose adding them and having  
them default to NULL as is currently done.  Does anyone foresee an  
issue with doing so?

Howard