EXTRAS-24 - Add the capability to IDL to query/set the displayed bands and display mode of a raster layer

[tclarke]

Currently, and IDL script cannot set or query the displayed bands or display mode of a raster layer. You can however, adjust the stretch values for a specific color channel of a raster layer. This existing capability would be significantly more useful if the above capability was added.

Original Issue: EXTRAS-24
Status: Deferred
Feature Interpretation:
Allow scriptors to change raster layer properties including displayed bands and RGB/Grayscale mode.
This capability exists in the SimpleAPI but there needs to be a small amount of stub code to allow IDL to access the SimpleAPI. Adding this stub code will allow access to all of the SimpleAPI from IDL. In addition, some IDL wrapper code can be written to make this functionality easier to use from IDL.

Suggested Solution:

Actual Solution:
Added needed support functions to IDL.
Added framework for object oriented IDL access to the simple api.
Added accessors/mutators for band display info to raster layer wrappers.

Severity:
Version Control: EXTRAS-24
Environment:
Linked: