[GRASS-dev] Modules

[Glynn Clements]

Michael Barton wrote:

> Your fix has made it possible (well potentially) to reinstitute automatic
> background creation from active maps in the GIS Manager layer tree. But I've
> hit a wall on how to parse multiple background maps. At first I thought it
> was TclTk. Then I realized that it wasn't possible from the command line
> either. For example...
> 
> GRASS 6.3.0-CVS-07020901 (spearfish60_test):~ > v.digit map=deleteme
> bgcmd="d.vect map=deleteme,d.rast map=aspect"
> PNG: GRASS_TRUECOLOR status: TRUE
> PNG: collecting to file:
> /Users/Shared/grassdata/spearfish60_test/PERMANENT/.tmp/cmb-MBP/6132.0.ppm,
> GRASS_WIDTH=640, GRASS_HEIGHT=471
> Illegal filename. Character <,> not allowed.
> ERROR: Vector file [deleteme,d.rast,aspect] not available
> 
> It won't parse the comma. I've tried various versions of single and double
> quotes around different parts of the expression.
> 
> Could it be that v.digit is not parsing this command correctly? Is this
> fixable or should I give up.

"v.digit --help" says:

  bgcmd   Display commands to be used for canvas backdrop (separated by ';')
                                                           ^^^^^^^^^^^^^^^^
Semicolons, not commas.

Presumably, the rationale was that individual commands might contain
commas (well, they *might* contain semicolons, but that's less
likely).

Note: I did actually test bgcmd= with multiple commands, specifically:

	v.digit fields bgcmd='d.rast fields;d.vect roads'

-- 
Glynn Clements <glynn at gclements.plus.com>